Relevant bibliographies by topics / Predator management

Academic literature on the topic 'Predator management'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Predator management.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Predator management"

1

Sandin, Stuart A., Beverly J. French, and Brian J. Zgliczynski. "Emerging insights on effects of sharks and other top predators on coral reefs." Emerging Topics in Life Sciences 6, no. 1 (March 8, 2022): 57–65. http://dx.doi.org/10.1042/etls20210238.

Full text
Abstract:
Predation is ubiquitous on coral reefs. Among the most charismatic group of reef predators are the top predatory fishes, including sharks and large-bodied bony fishes. Despite the threat presented by top predators, data describing their realized effects on reef community structure and functioning are challenging to produce. Many innovative studies have capitalized on natural experimental conditions to explore predator effects on reefs. Gradients in predator density have been created by spatial patterning of fisheries management. Evidence of prey release has been observed across some reefs, namely that potential prey increase in density when predator density is reduced. While such studies search for evidence of prey release among broad groups or guilds of potential prey, a subset of studies have sought evidence of release at finer population levels. We find that some groups of fishes are particularly vulnerable to the effects of predators and more able to capitalize demographically when predator density is reduced. For example, territorial damselfish appear to realize reliable population expansion with the reduction in predator density, likely because their aggressive, defensive behavior makes them distinctly vulnerable to predation. Relatedly, individual fishes that suffer from debilitating conditions, such as heavy parasite loads, appear to realize relatively stronger levels of prey release with reduced predator density. Studying the effects of predators on coral reefs remains a timely pursuit, and we argue that efforts to focus on the specifics of vulnerability to predation among potential prey and other context-specific dimensions of mortality hold promise to expand our knowledge.
APA, Harvard, Vancouver, ISO, and other styles
2

Engeman, Richard M., R. Erik Martin, Henry T. Smith, John Woolard, Carrie K. Crady, Stephanie A. Shwiff, Bernice Constantin, Margo Stahl, and John Griner. "Dramatic reduction in predation on marine turtle nests through improved predator monitoring and management." Oryx 39, no. 3 (July 2005): 318–26. http://dx.doi.org/10.1017/s0030605305000876.

Full text
Abstract:
We describe improvements to monitoring/indexing methodology for predators of marine turtle nests on the east coast of Florida, and the resulting marine turtle conservation implications from integrating the methodology into predator management. A strip transect from dune line to the shore improved an already successful design for monitoring raccoons, and was also sensitive for armadillos. The data were integrated into predator management operations to effectively and efficiently remove the species responsible for turtle nest predation. Tracking plot data also served to validate predator patterns of behavior relative to turtle nesting and improve prospects for preventive predator management strategies. Perhaps the most important finding is that predation at a beach historically suffering nearly complete losses (95%) of marine turtle nests had nest predation reduced to nominal levels (9.4%). For 2002 this predation level represents an estimated 69,000 additional hatchling turtles produced over historical predation rates, and 16,700 additional hatchlings over the previous lowest predation rate.
APA, Harvard, Vancouver, ISO, and other styles
3

Casula, Paolo, and Mauro Nannini. "Evaluating the Structure of Enemy Biodiversity Effects on Prey Informs Pest Management." ISRN Ecology 2013 (October 20, 2013): 1–15. http://dx.doi.org/10.1155/2013/619393.

Full text
Abstract:
Evaluating the structure of enemy biodiversity effects on prey in agroecosystems can provide insights into biological pest control functioning. With this aim, theoretical models that describe biological mechanisms underlying prey suppression can be developed and confronted with experimental data by means of model selection. Here, we confront multiplicative risk models to evaluate the structure of multiple predator effects on the whitefly Trialeurodes vaporariorum provided in tomatoes by two spiders (Oxyopes lineatus and Pityohyphantes phrygianus) and two mirids (Nesidiocoris tenuis and Macrolophus melanotoma). Biologically meaningful parameters retained in the best models showed that several predator traits differently affected pest control: species-specific per capita predation rates, prey use extent, different type of interactions between predators, and the response of predator species to prey density and environmental temperature. Even from a limited perspective of single-pest control and short term experiment, this study suggests that assembly of the four predator species results in predator complementarity across prey life stages and density, interactions of prey and predators with environmental conditions, and interactions between predators that do not result in whitefly control disruption. Such information about enemy biodiversity and whitefly control functioning can drive hypotheses about sustainable pest management options in local agroecosystems.
APA, Harvard, Vancouver, ISO, and other styles
4

Bannister, H., R. Brandle, and K. Moseby. "Antipredator behaviour of a native marsupial is relaxed when mammalian predators are excluded." Wildlife Research 45, no. 8 (2018): 726. http://dx.doi.org/10.1071/wr18060.

Full text
Abstract:
Context Predator-controlled environments can lead to prey species losing costly antipredator behaviours as they exploit their low-risk environment, creating a ‘predator-naïve’ population. If individuals lacking suitable antipredator behaviours are used as source populations for reintroductions to environments where predators are present, their behaviour could result in high post-release predation. In contrast, animals sourced from environments with predators (‘predator-exposed’) may show effective antipredator behaviours and thus higher survival post-release. Aims The aim was to compare the antipredator behaviour of brushtail possums (Trichosurus vulpecula) at predator-exposed and predator-naïve source populations, and then compare post-release survival after their reintroduction to a low predator environment. Methods Data were collected from possums at two sites, one with and one without mammalian predators. The behavioural responses of possums to a spotlighter, their willingness to use supplementary feeders at ‘safe’ and ‘risky’ heights, whether they avoided predator odour at traps and their general willingness to enter traps were recorded. Key results Predator-naïve possums showed weaker antipredator responses, were often found at ground level, engaged with novel objects, did not avoid predator scents and utilised different habitats regardless of associated predation risk. In contrast, predator-exposed possums had higher antipredator responses, chose connected trees, were rarely found at ground level and were generally difficult to capture. Post-translocation survival was high for both source populations. Predator-naïve-sourced female possums began to avoid predator urine (feral cat; Felis catus) 12 months after translocation. Conclusions Our research demonstrates that environmental predation risk can predict prey naïvety in brushtail possums. Some aspects of prey naïvety behaviour appear to be able to change in response to altered predation risk. Implications With many threatened species now existing only in feral predator-free areas, these results have implications for future reintroductions into unbounded areas where feral predators are present, and for the management of fenced reserves. The addition of a small number of predators to fenced reserves may aid in retaining antipredator behaviours in fenced prey populations.
APA, Harvard, Vancouver, ISO, and other styles
5

Engeman, Richard, R. Erik Martin, John Woolard, Margo Stahl, Charles Pelizza, Anthony Duffiney, and Bernice Constantin. "An ideal combination for marine turtle conservation: exceptional nesting season, with low nest predation resulting from effective low-cost predator management." Oryx 46, no. 2 (November 1, 2011): 229–35. http://dx.doi.org/10.1017/s0030605311000020.

Full text
Abstract:
AbstractWe examined impacts from effective predator management on nesting success of marine turtles in an exceptional nesting year at Hobe Sound National Wildlife Refuge, Florida, USA, a beach with a high density of nesting marine turtles that has a history of severe nest predation. Historically up to 95% of nests were predated, primarily by raccoons Procyon lotor and, more recently, armadillos Dasypus novemcinctus. Predator control was identified as the most important conservation tool for marine turtle reproduction. Predator management by refuge staff as ancillary duties typically only held predation levels to c. 50%. However, when experts in predator control were employed predation was substantially reduced. An extraordinary opportunity to evaluate the biological and economic benefits of this management approach occurred in 2008, a year with exceptionally heavy nesting. Loggerhead turtle Caretta caretta nesting resurged, green Chelonia mydas and leatherback Dermochelys coriacea turtles nested in record numbers, producing twice or more than their median number of nests, and the first Kemp’s ridley Lepidochelys kempii nest was observed. Overall predation was 14.7%, resulting in an estimated > 128,000 additional hatchlings emerging compared to estimates had no predator management been in place and historical predation rates occurred, and > 56,000 hatchlings more than expected had predator management been conducted as ancillary duties rather than by experts. The USD 12,000 investment for expert predator management equated to only USD 0.09 spent for each additional hatchling produced compared to the scenario of no predator control and only USD 0.21 compared to the scenario of predator control as ancillary duties.
APA, Harvard, Vancouver, ISO, and other styles
6

Radford, James Q., John C. Z. Woinarski, Sarah Legge, Marcus Baseler, Joss Bentley, Andrew A. Burbidge, Michael Bode, et al. "Degrees of population-level susceptibility of Australian terrestrial non-volant mammal species to predation by the introduced red fox (Vulpes vulpes) and feral cat (Felis catus)." Wildlife Research 45, no. 7 (2018): 645. http://dx.doi.org/10.1071/wr18008.

Full text
Abstract:
Context Over the last 230 years, the Australian terrestrial mammal fauna has suffered a very high rate of decline and extinction relative to other continents. Predation by the introduced red fox (Vulpes vulpes) and feral cat (Felis catus) is implicated in many of these extinctions, and in the ongoing decline of many extant species. Aims To assess the degree to which Australian terrestrial non-volant mammal species are susceptible at the population level to predation by the red fox and feral cat, and to allocate each species to a category of predator susceptibility. Methods We collated the available evidence and complemented this with expert opinion to categorise each Australian terrestrial non-volant mammal species (extinct and extant) into one of four classes of population-level susceptibility to introduced predators (i.e. ‘extreme’, ‘high’, ‘low’ or ‘not susceptible’). We then compared predator susceptibility with conservation status, body size and extent of arboreality; and assessed changes in the occurrence of species in different predator-susceptibility categories between 1788 and 2017. Key results Of 246 Australian terrestrial non-volant mammal species (including extinct species), we conclude that 37 species are (or were) extremely predator-susceptible; 52 species are highly predator-susceptible; 112 species are of low susceptibility; and 42 species are not susceptible to predators. Confidence in assigning species to predator-susceptibility categories was strongest for extant threatened mammal species and for extremely predator-susceptible species. Extinct and threatened mammal species are more likely to be predator-susceptible than Least Concern species; arboreal species are less predator-susceptible than ground-dwelling species; and medium-sized species (35 g–3.5kg) are more predator-susceptible than smaller or larger species. Conclusions The effective control of foxes and cats over large areas is likely to assist the population-level recovery of ~63 species – the number of extant species with extreme or high predator susceptibility – which represents ~29% of the extant Australian terrestrial non-volant mammal fauna. Implications Categorisation of predator susceptibility is an important tool for conservation management, because the persistence of species with extreme susceptibility will require intensive management (e.g. predator-proof exclosures or predator-free islands), whereas species of lower predator susceptibility can be managed through effective landscape-level suppression of introduced predators.
APA, Harvard, Vancouver, ISO, and other styles
7

Tsehaye, Iyob, Michael L. Jones, James R. Bence, Travis O. Brenden, Charles P. Madenjian, and David M. Warner. "A multispecies statistical age-structured model to assess predator–prey balance: application to an intensively managed Lake Michigan pelagic fish community." Canadian Journal of Fisheries and Aquatic Sciences 71, no. 4 (April 2014): 627–44. http://dx.doi.org/10.1139/cjfas-2013-0313.

Full text
Abstract:
Using a Bayesian modeling approach, we developed a multispecies statistical age-structured model to assess trade-offs between predatory demands and prey productivities, with the aim to inform management of top predators. Focusing on the Lake Michigan fish community, we assessed these trade-offs in terms of predation mortalities and productivities of alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax) and functional responses of salmonines. Our predation mortality estimates suggested that salmonine consumption has been a major driver of prey dynamics, with sharp declines in alewife abundance in the 1960s–1980s and the 2000s coinciding with increased predation rates. Our functional response analysis indicated that feedback mechanisms are unlikely to help maintain a predator–prey balance, with Chinook salmon (Oncorhynchus tshawytscha) and lake trout (Salvelinus namaycush) consumption declining only at the lowest prey densities, while the other salmonines consumed prey at a maximum rate across all observed prey densities. This study demonstrates that a multispecies modeling approach combining stock assessment methods with explicit consideration of predator–prey interactions can provide a basis for tactical decision-making from a broader ecosystem perspective.
APA, Harvard, Vancouver, ISO, and other styles
8

Hradsky, Bronwyn A. "Conserving Australia’s threatened native mammals in predator-invaded, fire-prone landscapes." Wildlife Research 47, no. 1 (2020): 1. http://dx.doi.org/10.1071/wr19027.

Full text
Abstract:
Abstract Inappropriate fire regimes and predation by introduced species each pose a major threat to Australia’s native mammals. They also potentially interact, an issue that is likely to be contributing to the ongoing collapse of native mammal communities across Australia. In the present review, I first describe the mechanisms through which fire could create predation pinch points, exacerbating the impacts of predators, including red foxes, Vulpes vulpes, and feral cats, Felis catus, on their native mammalian prey. These mechanisms include a localised increase in predator activity (a numerically mediated pathway) and higher predator hunting success after fire (a functionally moderated pathway), which could both increase native mammal mortality and limit population recovery in fire-affected landscapes. Evidence for such interactions is growing, although largely based on unreplicated experiments. Improving native mammal resilience to fire in predator-invaded landscapes requires addressing two key questions: how can the impacts of introduced predators on native mammals in fire-affected areas be reduced; and, does a reduction in predation by introduced species result in higher native mammal survival and population recovery after fire? I then examine potential management options for reducing predator impacts post-fire. The most feasible are landscape-scale predator control and the manipulation of fire regimes to create patchy fire scars. However, robust field experiments with adequate statistical power are required to assess the effectiveness of these approaches and preclude null (e.g. compensatory mortality) or adverse (e.g. mesopredator or competitor release) outcomes. Ongoing predator management and prescribed burning programs provide an opportunity to learn through replicated natural experiments as well as experimental manipulations. Standardised reporting protocols and cross-jurisdiction monitoring programs would help achieve necessary spatial and environmental replication, while multi-trophic, spatially explicit simulation models could help synthesise findings from disparate study designs, predict management outcomes and generate new hypotheses. Such approaches will be key to improving management of the complex mechanisms that drive threatened native mammal populations in Australia’s predator-invaded, fire-prone landscapes.
APA, Harvard, Vancouver, ISO, and other styles
9

Fey, Karen, Peter B. Banks, Hannu Ylönen, and Erkki Korpimäki. "Behavioural responses of voles to simulated risk of predation by a native and an alien mustelid: an odour manipulation experiment." Wildlife Research 37, no. 4 (2010): 273. http://dx.doi.org/10.1071/wr08031.

Full text
Abstract:
Context. Potential mammalian prey commonly use the odours of their co-evolved predators to manage their risks of predation. But when the risk comes from an unknown source of predation, odours might not be perceived as dangerous, and anti-predator responses may fail, except possibly if the alien predator is of the same archetype as a native predator. Aims. In the present study we examined anti-predator behavioural responses of voles from the outer archipelagos of the Baltic Sea, south-western Finland, where they have had no resident mammalian predators in recent history. Methods. We investigated responses of field voles (Microtus agrestis) to odours of native least weasels (Mustela nivalis) and a recently invading alien predator, the American mink (Mustela vison), in laboratory. We also studied the short-term responses of free-ranging field voles and bank voles (Myodes glareolus) to simulated predation risk by alien mink on small islands in the outer archipelago of the Baltic Sea. Key results. In the laboratory, voles avoided odour cues of native weasel but not of alien mink. It is possible that the response to mink is a context dependent learned response which could not be induced in the laboratory, whereas the response to weasel is innate. In the field, however, voles reduced activity during their normal peak-activity times at night as a response to simulated alien-mink predation risk. No other shifts in space use or activity in safer microhabitats or denser vegetation were apparent. Conclusions. Voles appeared to recognise alien minks as predators from their odours in the wild. However, reduction in activity is likely to be only a short-term immediate response to mink presence, which is augmented by longer-term strategies of habitat shift. Because alien mink still strongly suppresses vole dynamics despite these anti-predator responses, we suggest that behavioural naiveté may be the primary factor in the impact of an alien predator on native prey. Implications. Prey naiveté has long been considered as the root cause of the devastating impacts of alien predators, whereby native prey simply fail to recognise and respond to the novel predation risk. Our results reveal a more complex form of naiveté whereby native prey appeared to recognise alien predators as a threat but their response is ultimately inadequate. Thus, recognition alone is unlikely to afford protection for native prey from alien-predator impacts. Thus, management strategies that, for example, train prey in recognition of novel threats must induce effective responses if they are expected to succeed.
APA, Harvard, Vancouver, ISO, and other styles
10

PRASAD, K. DURGA, and SOURAV KUMAR SASMAL. "DYNAMICS OF ANTI-PREDATOR BEHAVIOR AND EFFECT OF FEAR ON PREY–PREDATOR MODEL." Journal of Biological Systems 30, no. 04 (December 2022): 887–912. http://dx.doi.org/10.1142/s0218339022500322.

Full text
Abstract:
Predator–prey interactions are the ubiquitous and natural phenomenon in an ecological system. Predators reduce the prey population’s density by direct killing, which is an essential part of any ecological system. Based on the experimental works, for overcoming predation pressure, prey uses a variety of mechanisms. With Holling type-II functional response, we examined a prey–predator system incorporating anti-predator behavior and the cost of fear into prey. Prey anti-predator activity is a counterattacking strategy in which adult prey targets adolescent predators in order to counteract the potential predation pressure. Fear of predation may disrupt the physiological state of prey species and lead to long loss of prey species. In this study, we investigated this aspect to use a dynamical modeling approach. This research finds a plethora of fascinating phenomena. The studied system exhibits a wide range of dynamics and bifurcations, including saddle-node, Hopf, homoclinic, and a Bogdanov–Takens bifurcation in co-dimension two are among the dynamics and bifurcations observed in the analyzed system. We performed some numerical simulations to investigate the effects of anti-predator behavior and fear on prey and found both affect the prey–predator dynamics significantly. Our numerical examples clearly show that as prey carrying capacity increases, so does the prey’s ability to perceive the risk of predation.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Predator management"

1

Waterworth, Rebeccah Anne. "Overcoming barriers to predation effect of alternative management practices on predator-herbivore dynamics in production nurseries /." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2936.

Full text
Abstract:
Thesis (M.S.) -- University of Maryland, College Park, 2005.
Thesis research directed by: Dept. of Entomology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
APA, Harvard, Vancouver, ISO, and other styles
2

Supriatna, Asep K. "Optimal harvesting theory for predator-prey metapopulations /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs959.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ddumba, Hassan. "Repulsive-attractive models for the impact of two predators on prey species varying in anti-predator response." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/d1010995.

Full text
Abstract:
This study considers the dynamical interaction of two predatory carnivores (Lions (Panthera leo) and Spotted Hyaenas (Crocuta crocuta)) and three of their common prey (Buffalo (Syncerus caffer), Warthog (Phacochoerus africanus) and Kudu (Tragelaphus strepsiceros)). The dependence on spatial structure of species’ interaction stimulated the author to formulate reaction-diffusion models to explain the dynamics of predator-prey relationships in ecology. These models were used to predict and explain the effect of threshold populations, predator additional food and prey refuge on the general species’ dynamics. Vital parameters that model additional food to predators, prey refuge and population thresholds were given due attention in the analyses. The stability of a predator-prey model for an ecosystem faced with a prey out-flux which is analogous to and modelled as an Allee effect was investigated. The results highlight the bounds for the conversion efficiency of prey biomass to predator biomass (fertility gain) for which stability of the three species ecosystem model can be attained. Global stability analysis results showed that the prey (warthog) population density should exceed the sum of its carrying capacity and threshold value minus its equilibrium value i.e., W >(Kw + $) −W . This result shows that the warthog’s equilibrium population density is bounded above by population thresholds, i.e., W < (Kw+$). Besides showing the occurrence under parameter space of the so-called paradox of enrichment, early indicators of chaos can also be deduced. In addition, numerical results revealed stable oscillatory behaviour and stable spirals of the species as predator fertility rate, mortality rate and prey threshold were varied. The stabilising effect of prey refuge due to variations in predator fertility and proportion of prey in the refuge was studied. Formulation and analysis of a robust mathematical model for two predators having an overlapping dietary niche were also done. The Beddington-DeAngelis functional and numerical responses which are relevant in addressing the Principle of Competitive Exclusion as species interact were incorporated in the model. The stabilizing effect of additional food in relation to the relative diffusivity D, and wave number k, was investigated. Stability, dissipativity, permanence, persistence and periodicity of the model were studied using the routine and limit cycle perturbation methods. The periodic solutions (b 1 and b 3), which influence the dispersal rate (') of the interacting species, have been shown to be controlled by the wave number. For stability, and in order to overcome predator natural mortality, the nutritional value of predator additional food has been shown to be of high quality that can enhance predator fertility gain. The threshold relationships between various ecosystem parameters and the carrying capacity of the game park for the prey species were also deduced to ensure ecosystem persistence. Besides revealing irregular periodic travelling wave behaviour due to predator interference, numerical results also show oscillatory temporal dynamics resulting from additional food supplements combined with high predation rates.
APA, Harvard, Vancouver, ISO, and other styles
4

Go, Dong-Hun. "Three Essays in Economics of Prey-Predator Relation." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7031.

Full text
Abstract:
This dissertation explores how natural ecosystem can be integrated with economic system through two case studies of multiple species interactions, or predator-prey relations. By the inclusion of biological, ecological and economic aspects, the integrated approaches aim at more clearly understanding of how regional ecosystem and economy interact with each other, given threats of resource extinction and environmental shock. I also explain strategies and policy regimes that can be considered to achieve efficient and sustainable ecosystem management in those circumstances. The first case study focuses on a predator-prey relation in the Pacific Ocean between the United States and Canada, where endangered/threatened predators feed primarily on commercially valuable species as prey. Accounting for the importance of those predators as critical natural resources for whale watching industry, this case study synthesizes the species biological and the regional economic systems, and analyzes possible management strategies for both ecosystem conservation and sustainable economic growth. A long-term drought and fragmented management has been one of the critical issues in the Great Salt Lake (GSL) ecosystem that is linked with its regional economy in Utah. For this issue, the second case study builds an integrated model for describing how the lakes main natural resources, such as water, brine shrimp, and migratory birds, are related to primary industries in the region including agriculture, mining, fishery, and recreation. With the model framework, the study presents how the prolonged drought affects both the GSL ecosystem and its rigional economy, and suggests economic management strategies for the lakes ecosystem recovery in the presence of drought.
APA, Harvard, Vancouver, ISO, and other styles
5

Söderström, Bo. "Farmland birds in semi-natural pastures : conservation and management /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5463-8.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Elswick, Samuel Taylor. "Predator Management and Colonial Culture, 1600-1741: A Study in Historical Ecology." W&M ScholarWorks, 2005. https://scholarworks.wm.edu/etd/1539626482.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Moosa, Naseera. "An updated model of the krill-predator dynamics of the Antarctic ecosystem." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25490.

Full text
Abstract:
The objective of this thesis is to update the Mori-Butterworth (2006) model of the krill-predator dynamics of the Antarctic ecosystem. Their analysis aimed to determine whether predator-prey interactions alone could broadly explain the observed population trends of the species considered in their model. In this thesis, the Antarctic ecosystem is outlined brie y and details are given of the main krill-eating predators including whales, seals, fish and penguins, together with an historical record of the human harvesting in the region. The abundances and per capita krill consumption of the krill-predators are calculated and used to determine the main krill-predators to be used in the updated model developed. These predators are found to be the blue, fin, humpback and minke whales and crabeater and Antarctic fur seals. The three main ship surveys (IDCR/SOWER, JARPA and JSV) used to estimate whale abundance, and the abundance estimation method itself (called distance sampling), are summarised. Updated estimates of abundance and trends are listed for the main krill-predators. Updated estimates for the biological parameters needed for the ecosystem model are also reported, and include some differences in approaches to those adopted for the Mori-Butterworth model. The background to the hypothesis of a krill-surplus during the mid-20th century is discussed as well as the effects of environmental change in the context of possible causes of the population changes of the main krill-feeding predators over the last century. Key features of the results of the updated model are the inclusion of a depensatory effect for Antarctic fur seals in the krill and predator dynamics, and the imposition of bounds on Ka (the carrying capacity of krill in Region a, in the absence of its predators); these lead to a better fit overall. A particular difference in results compared to those from the Mori-Butterworth model is more oscillatory behaviour in the trajectories for krill and some of its main predators. This likely results from the different approach to modelling natural mortality for krill and warrants further investigation. That may in turn resolve a key mismatch in the model which predicts minke oscillations in the Indo-Pacific region to be out of phase with results from a SCAA assessment of these whales. A number of other areas for suggested future research are listed. The updated model presented in this thesis requires further development before it might be considered sufficiently reliable for providing advice for the regulation and implementation of suitable conservation and harvesting strategies in the Antarctic.
APA, Harvard, Vancouver, ISO, and other styles
8

Gentle, Matthew Nikolai. "Factors Affecting The Efficiency Of Fox (Vulpes Vulpes) Baiting Practices On The Central Tablelands Of New South Wales." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/890.

Full text
Abstract:
The European red fox (Vulpes vulpes L.) is a well known predator of native species and domestic stock, and is recognised as one of Australia’s most devastating vertebrate pests. Current fox management relies heavily on poisoning using baits impregnated with sodium monofluoroacetate (1080). This reliance on 1080 is likely to continue given the lack of viable alternatives for controlling foxes, so that, in the meanwhile, it is important to improve the efficiency of the current techniques. Factors affecting the susceptibility of individual foxes to bait include their ability to locate it, as well as the bait’s palatability and toxicity. The economic costs associated with using different bait types, the pattern and density of their distribution will also affect the efficiency of control programs. It is essential to examine and refine all such issues to ensure efficient use of the 1080 baiting technique. This thesis focuses generally on problems associated with management of the fox in eastern Australia. More specifically, I investigate the factors affecting the efficiency of fox baiting practices on the central tablelands of New South Wales. The study was conducted largely on agricultural lands near the town of Molong (33010’ 37”S, 148087’15”E) on the central tablelands of New South Wales. This area was chosen as it is broadly representative, in terms of land use, of a large region of eastern Australia. The highly modified, predominantly agricultural landscapes near Molong are well suited to foxes, and conflict with the predominantly pastoral community means that fox management is widely undertaken. I determined the persistence of 1080 in two commonly used bait types, Foxoff® and chicken wingettes, under different climatic and rainfall conditions. The rate of 1080 degradation did not change significantly between the central tablelands and the relatively hotter and drier western slopes. Foxoff® baits remained lethal for longer than wingettes under all conditions, although their rate of degradation generally increased with increasing rainfall. I confirmed the presence of defluorinating micro-organisms in thesoils of eastern Australia for the first time, and suggest that, following removal from the bait, 1080 would not persist in the environment for long. Bait should be attractive and highly palatable to ensure that the target species will find and consume it upon discovery. Caching, where discovered food is removed but not immediately consumed, may potentially reduce the efficacy and cost-effectiveness of baiting campaigns. I quantified the caching of chicken wingette, day-old chick and Foxoff® baits by inserting transmitters into bait material and assessing whether it was eaten or cached following removal. The intensity of caching did not change significantly between seasons. Type of bait had the largest influence on caching intensity, with a greater percentage of non-toxic Foxoff® baits (66.9%) being cached than either wingettes (5.7%) or day-old chicks (4.5%). The percentage of toxic (1080) baits cached was even greater, suggesting that 1080 bait may be less palatable, and detectable to foxes. I also investigated the use of conditioned taste aversion to reduce multiple bait uptake by foxes. Levamisole, an illness-inducing chemical, was added to bait and the fate of removed bait was again monitored via radio-telemetry. Following consumption of a levamisole-treated bait, foxes avoided eating treated baits but consumed untreated baits. I concluded that a reduction in bait consumption was achieved through learned aversion to levamisole rather than via conditioned taste aversion to baits. Adding levamisole to baits, especially non-toxic bait such as rabies vaccines, could potentially be used to reduce bait monopolisation by individual foxes. Fox density and den site preferences were assessed by investigating the distribution and density of fox natal dens on one property (9.6 km2) over three consecutive years. A total of 9 natal dens were located in 2000 and 2001, declining to 6 in 2002. No preference was shown for den sites on the basis of habitat, slope or aspect, but more dens were located under, or adjacent to cover. Assuming that each natal den represents a breeding pair and that the population sex ratio did not differ from parity (1:1), the site contained a prebreeding density of 1.9 foxes/km2 in 2000 and 2001, and 1.25 foxes/km2 in 2002. Given that the mean number of cubs is 4.0, the post-breeding density was estimated at 5.6 and 3.75 foxes/km2 in 2000/2001 and 2002, respectively. The results demonstrated that high densities of foxes occur on agricultural lands. The success and likely accuracy of the technique to monitor fox density suggests that it may be used to calibrate more efficient abundance estimates that will be essential for the strategic management of foxes in future. Pest animal management strategies are traditionally assessed for their effectiveness, with less consideration being given to the efficiency or cost of achieving the desired effect. I used cost-effectiveness analyses to compare between different baiting strategies based on the longevity, palatability and handling/replacement costs associated with each bait type. The results indicated that, when measured on a total cost-per-bait-consumed basis, wingettes and day-old chicks were the most cost-effective baits for campaigns of up to 4 weeks duration. This demonstrates the importance of including the longevity, and particularly the palatability of bait, when assessing cost-effectiveness. However, it is recognised that other factors, including the consistency of dosage and uptake by nontarget species, may be equally or more important in deciding the appropriate baiting strategy. The spatial and temporal application of fox baiting in the region overseen by the Molong Rural Lands Protection Board was examined between January 1998 and December 2002 as a case study to evaluate the apparent effectiveness of cooperative management practices. Most landholders (78.8%) did not bait for foxes during this period. Based on known dispersal distances, the effect of fox immigration into baited areas was determined. The results indicated that no areas baited for foxes were separated by a sufficient buffer distance (>9.58 km) from unbaited areas to be protected from fox immigration. This suggests that, at current levels of coordination, the effectiveness of most baiting operations in eastern Australia is compromised over the long term by fox immigration. However, it is recognised that short-term reductions in fox density may sometimes be all that are required to reduce predation to acceptable levels, especially for seasonally-susceptible prey. Ultimately, the cost-effectiveness of control should be evaluated in terms of the response of the prey rather than that of the predator. This study has highlighted deficiencies in current ‘best-practice’ baiting techniques. Specific recommendations for current baiting practices, in addition to future research, are also given. In brief, these include minimising free-feed baiting, increasing the minimum distance between bait stations, and, where possible, presenting the most palatable bait. Continued research into conditioned taste aversion, aerial baiting, and techniques to reduce caching are recommended as potential techniques to improve the efficiency of baiting practices.
APA, Harvard, Vancouver, ISO, and other styles
9

Gentle, Matthew Nikolai. "Factors Affecting The Efficiency Of Fox (Vulpes Vulpes) Baiting Practices On The Central Tablelands Of New South Wales." University of Sydney, 2005. http://hdl.handle.net/2123/890.

Full text
Abstract:
Doctor of Philosophy(PhD)
The European red fox (Vulpes vulpes L.) is a well known predator of native species and domestic stock, and is recognised as one of Australia’s most devastating vertebrate pests. Current fox management relies heavily on poisoning using baits impregnated with sodium monofluoroacetate (1080). This reliance on 1080 is likely to continue given the lack of viable alternatives for controlling foxes, so that, in the meanwhile, it is important to improve the efficiency of the current techniques. Factors affecting the susceptibility of individual foxes to bait include their ability to locate it, as well as the bait’s palatability and toxicity. The economic costs associated with using different bait types, the pattern and density of their distribution will also affect the efficiency of control programs. It is essential to examine and refine all such issues to ensure efficient use of the 1080 baiting technique. This thesis focuses generally on problems associated with management of the fox in eastern Australia. More specifically, I investigate the factors affecting the efficiency of fox baiting practices on the central tablelands of New South Wales. The study was conducted largely on agricultural lands near the town of Molong (33010’ 37”S, 148087’15”E) on the central tablelands of New South Wales. This area was chosen as it is broadly representative, in terms of land use, of a large region of eastern Australia. The highly modified, predominantly agricultural landscapes near Molong are well suited to foxes, and conflict with the predominantly pastoral community means that fox management is widely undertaken. I determined the persistence of 1080 in two commonly used bait types, Foxoff® and chicken wingettes, under different climatic and rainfall conditions. The rate of 1080 degradation did not change significantly between the central tablelands and the relatively hotter and drier western slopes. Foxoff® baits remained lethal for longer than wingettes under all conditions, although their rate of degradation generally increased with increasing rainfall. I confirmed the presence of defluorinating micro-organisms in thesoils of eastern Australia for the first time, and suggest that, following removal from the bait, 1080 would not persist in the environment for long. Bait should be attractive and highly palatable to ensure that the target species will find and consume it upon discovery. Caching, where discovered food is removed but not immediately consumed, may potentially reduce the efficacy and cost-effectiveness of baiting campaigns. I quantified the caching of chicken wingette, day-old chick and Foxoff® baits by inserting transmitters into bait material and assessing whether it was eaten or cached following removal. The intensity of caching did not change significantly between seasons. Type of bait had the largest influence on caching intensity, with a greater percentage of non-toxic Foxoff® baits (66.9%) being cached than either wingettes (5.7%) or day-old chicks (4.5%). The percentage of toxic (1080) baits cached was even greater, suggesting that 1080 bait may be less palatable, and detectable to foxes. I also investigated the use of conditioned taste aversion to reduce multiple bait uptake by foxes. Levamisole, an illness-inducing chemical, was added to bait and the fate of removed bait was again monitored via radio-telemetry. Following consumption of a levamisole-treated bait, foxes avoided eating treated baits but consumed untreated baits. I concluded that a reduction in bait consumption was achieved through learned aversion to levamisole rather than via conditioned taste aversion to baits. Adding levamisole to baits, especially non-toxic bait such as rabies vaccines, could potentially be used to reduce bait monopolisation by individual foxes. Fox density and den site preferences were assessed by investigating the distribution and density of fox natal dens on one property (9.6 km2) over three consecutive years. A total of 9 natal dens were located in 2000 and 2001, declining to 6 in 2002. No preference was shown for den sites on the basis of habitat, slope or aspect, but more dens were located under, or adjacent to cover. Assuming that each natal den represents a breeding pair and that the population sex ratio did not differ from parity (1:1), the site contained a prebreeding density of 1.9 foxes/km2 in 2000 and 2001, and 1.25 foxes/km2 in 2002. Given that the mean number of cubs is 4.0, the post-breeding density was estimated at 5.6 and 3.75 foxes/km2 in 2000/2001 and 2002, respectively. The results demonstrated that high densities of foxes occur on agricultural lands. The success and likely accuracy of the technique to monitor fox density suggests that it may be used to calibrate more efficient abundance estimates that will be essential for the strategic management of foxes in future. Pest animal management strategies are traditionally assessed for their effectiveness, with less consideration being given to the efficiency or cost of achieving the desired effect. I used cost-effectiveness analyses to compare between different baiting strategies based on the longevity, palatability and handling/replacement costs associated with each bait type. The results indicated that, when measured on a total cost-per-bait-consumed basis, wingettes and day-old chicks were the most cost-effective baits for campaigns of up to 4 weeks duration. This demonstrates the importance of including the longevity, and particularly the palatability of bait, when assessing cost-effectiveness. However, it is recognised that other factors, including the consistency of dosage and uptake by nontarget species, may be equally or more important in deciding the appropriate baiting strategy. The spatial and temporal application of fox baiting in the region overseen by the Molong Rural Lands Protection Board was examined between January 1998 and December 2002 as a case study to evaluate the apparent effectiveness of cooperative management practices. Most landholders (78.8%) did not bait for foxes during this period. Based on known dispersal distances, the effect of fox immigration into baited areas was determined. The results indicated that no areas baited for foxes were separated by a sufficient buffer distance (>9.58 km) from unbaited areas to be protected from fox immigration. This suggests that, at current levels of coordination, the effectiveness of most baiting operations in eastern Australia is compromised over the long term by fox immigration. However, it is recognised that short-term reductions in fox density may sometimes be all that are required to reduce predation to acceptable levels, especially for seasonally-susceptible prey. Ultimately, the cost-effectiveness of control should be evaluated in terms of the response of the prey rather than that of the predator. This study has highlighted deficiencies in current ‘best-practice’ baiting techniques. Specific recommendations for current baiting practices, in addition to future research, are also given. In brief, these include minimising free-feed baiting, increasing the minimum distance between bait stations, and, where possible, presenting the most palatable bait. Continued research into conditioned taste aversion, aerial baiting, and techniques to reduce caching are recommended as potential techniques to improve the efficiency of baiting practices.
APA, Harvard, Vancouver, ISO, and other styles
10

Martins, de Lucena Flavia. "Species interaction in fish stock assessment and management in southern Brazil : a bio-economic approach." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327604.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Predator management"

1

Montana Outfitters & Guides Association. and Montana. Dept. of Fish, Wildlife, and Parks., eds. Predator management in Montana: Symposium proceedings. [Billings, Mont.]: Montana Fish, Wildlife & Parks, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

United States. Bureau of Land Management. Montana State Office. Environmental assessment for predator management in Montana. [Billings, Mont.?]: State Office, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

United States. Bureau of Land Management. Montana State Office., ed. Environmental assessment for predator management in Montana. [Billings, Mont.?]: U.S. Dept. of the Interior, Bureau of Land Management, Montana State Office, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bangs, Edward E. Return of a predator: Wolf recovery in Montana. Helena, MT (Federal Building, 301 S. Park, Box 10023, Helena 59626): U.S. Fish and Wildlife Service, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Predator-Prey Modeling Workshop (May 16-19, 1989 Friday Harbor, Wash. Proceedings of the Predator-Prey Modeling Workshop. Portland, Ore: Bonneville Power Administration, Division of Fish and Wildlife, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Janz, Doug. A rationale for wolf control in the management of the Vancouver Island predator-ungulate system. Victoria, B.C: Wildlife Branch, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

McNay, Mark E. Development and testing of a general predator-prey computer model for use in making management decisions. Juneau, AK (P.O. Box 25526, Juneau 99802): State of Alaska, Dept. of Fish and Game, Division of Wildlife Conservation, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

1926-, Dickie Lloyd Merlin, ed. The biomass spectrum: A predator-prey theory of aquatic production. New York: Columbia University Press, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

L, Boyd I., Wanless S, and Camphuysen C. J, eds. Top predators in marine ecosystems: Their role in monitoring and management. Cambridge, UK: Cambridge University Press, 2006.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Brunnermeier, Markus Konrad. Predatory trading. Cambridge, MA: National Bureau of Economic Research, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Predator management"

1

Santiago-Ávila, Francisco J., William S. Lynn, and Adrian Treves. "Inappropriate consideration of animal interests in predator management." In Large Carnivore Conservation and Management, 227–51. Abingdon, Oxon ; New York, NY : Routledge, 2018. | Series: Earthscan studies in natural resource management: Routledge, 2018. http://dx.doi.org/10.4324/9781315175454-12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Jacobson, Robert J. "Egg Laying Sites of Orius majusculus, a Thrips Predator, on Cucumber." In Thrips Biology and Management, 241–44. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1409-5_36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zheng, Wei-wei, and Er-dong Han. "Permanence and Extinction of Periodic Delay Predator–Prey System with Two Predators and Stage Structure for Prey." In The 19th International Conference on Industrial Engineering and Engineering Management, 1469–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38391-5_155.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Donovan, Victoria M., and Jesse N. Popp. "Linear corridors and predator movement dynamics in the Great Lakes Basin." In Biodiversity, Conservation, and Environmental Management in the Great Lakes Basin, 88–98. Milton Park, Abingdon, Oxon ; New York, NY : Routledge, 2018.: Routledge, 2017. http://dx.doi.org/10.4324/9781315268774-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pérez-Hedo, Meritxell, and Alberto Urbaneja. "The Zoophytophagous Predator Nesidiocoris tenuis: A Successful But Controversial Biocontrol Agent in Tomato Crops." In Advances in Insect Control and Resistance Management, 121–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31800-4_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Park, Mira, Wenli Yang, Zehong Cao, Byeong Kang, Damian Connor, and Mary-Anne Lea. "Marine Vertebrate Predator Detection and Recognition in Underwater Videos by Region Convolutional Neural Network." In Knowledge Management and Acquisition for Intelligent Systems, 66–80. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30639-7_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Khare, Shivani, Kunwer Singh Mathur, and Rajkumar Gangele. "Stochastic Predator-Prey Model with Disease in Prey and Hybrid Impulses for Integrated Pest Management." In Nonlinear Dynamics and Applications, 1133–48. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99792-2_96.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ibbotson, A., and C. Klee. "Impacts and Subsequent Control of an Introduced Predator: the Case of Pike, Esox Lucius, in Chew Valley Lake." In Management and Ecology of Lake and Reservoir Fisheries, 203–16. Oxford, UK: Blackwell Publishing Ltd, 2007. http://dx.doi.org/10.1002/9780470995679.ch16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Xu, Jing-hong, Tong-bing Ma, and Yun-long Yi. "Analysis and Simulation Application for Enterprise Populations M&A Based on Predator-Prey Model." In Proceedings of the 23rd International Conference on Industrial Engineering and Engineering Management 2016, 287–90. Paris: Atlantis Press, 2017. http://dx.doi.org/10.2991/978-94-6239-255-7_51.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Roy, Anja, Hans-Heinrich Krüger, and Maria Schmalz. "Management in wesentlichen Konfliktfeldern um den Fischotter – Übersicht zum aktuellen Wissensstand." In Evidenzbasiertes Wildtiermanagement, 127–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65745-4_6.

Full text
Abstract:
ZusammenfassungNach dem drohenden Aussterben des Fischotters in Mitteleuropa erholen sich seit Mitte des 20. Jahrhunderts die Bestände dieser Tierart. Aus der Rückbesiedlung in ehemalige Verbreitungsgebiete, in denen sich mittlerweile Wirtschaftsformen und Praktiken des Fischmanagements ohne die Präsenz des Topprädators Fischotter entwickelt haben, resultieren vor allem in der Fischerei Konflikte verschiedener Interessensgruppen. Der Wissensstand im aktuellen Management dieser Konflikte wird umrissen, angewandte Methoden und Einzelmaßnahmen in ihrer Wirksamkeit beschrieben und diskutiert sowie Ergebnisse einer aktuellen Umfrage in Deutschland hinzugezogen. Es bestehen deutschlandweit wesentliche Wissenslücken zu grundlegenden Populationsdaten zum Fischotter, zu sozioökonomischen Hintergründen bestehender Konflikte und zur Kausalität auftretender Rückgänge von Fischbeständen und wirtschaftlichen Verlusten in fischereilichen Betrieben. Besonders schwierig zu lösen sind Konflikte in Teichwirtschaftsgebieten. Auftretende wirtschaftliche Verluste sind hier nicht alleine dem Fischotter als Verursacher zuzuschreiben, sondern müssen in der Gesamtheit aller fischfressenden Prädatoren betrachtet werden. In Teichwirtschaften sind nur begrenzt direkte Abwehrmaßnahmen gegen den Fischotter durch Zäunungen möglich. Die Entwicklung regional angepasster Managementpakete wird durch fehlende Daten erschwert. Einzelne Lösungsansätze vor allem aus Sachsen zeigen aber, dass auch hier Konfliktbeilegungen möglich sind. Weitere Konfliktfelder in der Gewässerbewirtschaftung, der Fallenjagd und bei Freizeitaktivitäten werden angesprochen.AbstractAfter the otter was threatened with extinction in Central Europe, its populations have recovered since the middle of the 20th century. The recolonization of former habitats, where economic systems and fish management systems have developed in the meantime without the presence of this apex predator, has led to conflicts with various stakeholders, especially fisheries. This paper outlines the state of knowledge in the current management of these conflicts. Applied methods and individual measures are described, discussed and evaluated, with reference to the results of a recent survey conducted in Germany. Nationwide, there are major knowledge gaps regarding basic data on the otter population, the socio-economic background of existing conflicts, and the causal chain between fish population declines and economic losses in the fishing industry. Conflicts are particularly difficult to resolve in pond-based fisheries, where not only otters but all piscivorous predators must be considered in their entirety. In pond farms, fencing is only a limited means of directly deterring otters. The development of regionally adapted management packages is hampered by a lack of data. However, individual approaches, especially from Saxony, show that conflict resolution is possible even in such cases. Further areas of conflict in water management, trapping and recreational activities are addressed.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Predator management"

1

Yanqiu Li and Jizhang Fan. "The Predator-Prey system with √X Functional Response with random perturbation." In 2012 International Conference on Information Management, Innovation Management and Industrial Engineering (ICIII). IEEE, 2012. http://dx.doi.org/10.1109/iciii.2012.6339921.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Secretan, Jimmy, Evan Turner, and Damla Turgut. "PREDATOR: A Protocol for Ad-hoc and Brokered Dynamic Spectrum Management." In 2007 IEEE Wireless Communications and Networking Conference. IEEE, 2007. http://dx.doi.org/10.1109/wcnc.2007.475.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Djohan. "Biomagnification factors of chlorobenzenes in predator-prey systems." In INVENTING PROSPEROUS FUTURE THROUGH BIOLOGICAL RESEARCH AND TROPICAL BIODIVERSITY MANAGEMENT: Proceedings of the 5th International Conference on Biological Science. Author(s), 2018. http://dx.doi.org/10.1063/1.5050108.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bulgakova, T. "Optimum Control in a Predator-Prey Model Based on a Two-Species Exploited Ecosystem." In Ecosystem Approaches for Fisheries Management. Alaska Sea Grant, University of Alaska Fairbanks, 1999. http://dx.doi.org/10.4027/eafm.1999.16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ritz, Fabian, Felix Hohnstein, Robert Müller, Thomy Phan, Thomas Gabor, Carsten Hahn, and Claudia Linnhoff-Popien. "Towards Ecosystem Management from Greedy Reinforcement Learning in a Predator-Prey Setting." In The 2020 Conference on Artificial Life. Cambridge, MA: MIT Press, 2020. http://dx.doi.org/10.1162/isal_a_00273.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Nagurney, Anna, and Ladimer S. Nagurney. "Spatial price equilibrium and food webs: The economics of predator-prey networks." In 2011 International Conference on Business Management and Electronic Information (BMEI). IEEE, 2011. http://dx.doi.org/10.1109/icbmei.2011.5914417.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Allamano-Kessler, Renaud, Joelle Morana, Jesus Gonzalez-Feliu, Hamid Allaoui, and Luc Doyen. "Stability around the hyper-LSP in French distribution channel: a “prey-predator” modeling." In 2015 International Conference on Industrial Engineering and Systems Management (IESM). IEEE, 2015. http://dx.doi.org/10.1109/iesm.2015.7380217.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Grimm, Brian A., Brooke A. Lahneman, Peter B. Cathcart, Robert C. Elgin, Greg L. Meshnik, and John P. Parmigiani. "Autonomous Unmanned Aerial Vehicle System for Controlling Pest Bird Population in Vineyards." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89528.

Full text
Abstract:
Pest birds have long been a significant source of crop loss for grape growers, especially during the critical weeks leading up to harvest when grape sugar levels are high. In Oregon’s Willamette Valley, vineyards have seen a marked increase in crop loss in the last few years despite widespread use of intrusive gas cannons/shotguns and expensive netting systems. In order to deter this pest bird population, we have created an Unmanned Aerial Vehicle (UAV) package capable of autonomous flight, which incorporates common pest bird scare tactics into this dynamic platform. The system has been designed to launch, complete its mission waypoints, and land completely under autonomous control. By using this autonomous guidance system, we are able to employ visual, auditory, and predator mimicry pest bird control techniques in such a way as to discourage habituation. While radio controlled UAVs have been used for bird control in airport settings for many years, these systems require a trained operator to constantly guide the aircraft. The autonomous UAV system was designed for operation by an existing vineyard employee with minimal training. To capture widely accepted pest bird control techniques and management culture of Willamette Valley vineyards and gain information for design, implementation, and industry acceptance of this UAV project, we surveyed the owners of 225 local vineyards. Survey results indicated that vineyard owners are open to implementing innovative pest bird control methods that do not affect the terroir of their vineyards and that could replace the use of netting, which they do not view favorably despite its being the most effective pest bird control method to date. Results also indicated that pest birds are most damaging to a vineyard’s perimeter and that many vineyards employ someone to patrol this perimeter with a shotgun loaded with cracker shells. The UAV system is able to traverse the airspace above this perimeter without interfering with neighboring homes or beneficial predators in the area. By using proven pest bird control methods in an autonomous UAV system, we designed a device that brings an innovative solution to vineyard owners.
APA, Harvard, Vancouver, ISO, and other styles
9

Coupal, Brian, and Paula Bentham. "If You Build It, Will They Come? Caribou Habitat Restoration for Pipeline Projects." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33577.

Full text
Abstract:
The federal Recovery Strategy for the Woodland Caribou (Rangifer tarandus caribou), Boreal Population in Canada, identifies coordinated actions to reclaim woodland caribou habitat as a key step to meeting current and future caribou population objectives. Actions include restoring industrial landscape features such as roads, seismic lines, pipelines, cut-lines, and cleared areas in an effort to reduce landscape fragmentation and the changes in caribou population dynamics associated with changing predator-prey dynamics in highly fragmented landscapes. Reliance on habitat restoration as a recovery action within the federal Recovery Strategy is high, identifying 65% undisturbed habitat in a caribou range as the threshold to providing a 60% chance that a local population will be self-sustaining. In alignment with the federal Recovery Strategy, Alberta’s Provincial Woodland Caribou Policy identifies habitat restoration as a critical component of long-term caribou habitat management. Habitat restoration initiatives of Alberta’s historical industrial footprint within caribou ranges began in 2001 and have largely focused on linear corridors, including pipelines. Initiatives include revegetation treatments, access control programs and studies, and restricting the growth of plant species that are favourable to moose and deer, the primary prey for wolves. Habitat restoration for pipelines also includes pre-construction planning to reduce disturbance and create line-of-sight breaks, and construction techniques that promote natural vegetation recovery. Lessons learned from habitat restoration programs implemented on pipeline projects in northeastern Alberta will be shared as an opportunity to improve common understanding of restoration techniques, the barriers to implementation, and potential outcomes.
APA, Harvard, Vancouver, ISO, and other styles
10

Kitchell, J. K., C. H. Boggs, X. He, and C. J. Walters. "Keystone Predators in the Central Pacific." In Ecosystem Approaches for Fisheries Management. Alaska Sea Grant, University of Alaska Fairbanks, 1999. http://dx.doi.org/10.4027/eafm.1999.47.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Predator management"

1

Lundgren, Jonathan, Moshe Coll, and James Harwood. Biological control of cereal aphids in wheat: Implications of alternative foods and intraguild predation. United States Department of Agriculture, October 2014. http://dx.doi.org/10.32747/2014.7699858.bard.

Full text
Abstract:
The overall objective of this proposal is to understand how realistic strategies for incorporating alternative foods into wheat fields affect the intraguild (IG) interactions of omnivorous and carnivorous predators and their efficacy as biological control agents. Cereal aphids are a primary pest of wheat throughout much of the world. Naturally occurring predator communities consume large quantities of cereal aphids in wheat, and are partitioned into aphid specialists and omnivores. Within wheat fields, the relative abilities of omnivorous and carnivorous predators to reduce cereal aphids depend heavily on the availability, distribution and type of alternative foods (alternative prey, sugar, and pollen), and on the intensity and direction of IG predation events within this community. A series of eight synergistic experiments, carefully crafted to accomplish objectives while accounting for regional production practices, will be conducted to explore how cover crops (US, where large fields preclude effective use of field margins) and field margins (IS, where cover crops are not feasible) as sources of alternative foods affect the IG interactions of predators and their efficacy as biological control agents. These objectives are: 1. Determine the mechanisms whereby the availability of alternative prey and plant-provided resources affect pest suppression by omnivorous and carnivorous generalist predators; 2. Characterize the intensity of IGP within generalist predator communities of wheat systems and assess the impact of these interactions on cereal aphid predation; and 3. Evaluate how spatial patterns in the availability of non-prey resources and IGP affect predation on cereal aphids by generalist predator communities. To accomplish these goals, novel tools, including molecular and biochemical gut content analysis and geospatial analysis, will be coupled with traditional techniques used to monitor and manipulate insect populations and predator efficacy. Our approach will manipulate key alternative foods and IG prey to determine how these individual interactions contribute to the ability of predators to suppress cereal aphids within systems where cover crop and field margin management strategies are evaluated in production scale plots. Using these strategies, the proposed project will not only provide cost-effective and realistic solutions for pest management issues faced by IS and US producers, but also will provide a better understanding of how spatial dispersion, IG predation, and the availability of alternative foods contribute to biological control by omnivores and carnivores within agroecosystems. By reducing the reliance of wheat producers on insecticides, this proposal will address the BARD priorities of increasing the efficiency of agricultural production and protecting plants against biotic sources of stress in an environmentally friendly and sustainable manner.
APA, Harvard, Vancouver, ISO, and other styles
2

Young, Franklin R., Mark L. Wachtel, and Marc R. Petersen. Development of a System-wide Predator Control Program: Stepwise Implementation of a Predation Index, Predator Control Fisheries, and Evaluation Plan in the Columbia River Basin; Northern Pikeminnow Management Program, 1998 Annual Report. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/842469.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Young, Franklin R., Lyle G. Fox, and Jennifer Amren. Development of a System-Wide Predator Control Program: Stepwise Implementation of a Predation Index, Predator Control Fisheries, and Evaluation Plan in the Columbia River Basin; Northern Pikeminnow Management Program, 1999 Annual Report. Office of Scientific and Technical Information (OSTI), August 2003. http://dx.doi.org/10.2172/842470.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Porter, Russell G., Bryce G. Glaser, and Jennifer Amren. Development of a System-Wide Predator Control Program: Stepwise Implementation of a Predation Index, Predator Control Fisheries, and Evaluation Plan in the Columbia River Basin; Northern Pikeminnow Management Program, 2000 Annual Report. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/842471.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Porter, Russell G., Eric C. Winther, and Lyle G. Fox. Development of a System-Wide Predator Control Program: Stepwise Implementation of a Predation Index, Predator Control Fisheries, and Evaluation Plan in the Columbia River Basin; Northern Pikeminnow Management Program, 2001 Annual Report. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/842946.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Porter, Russell G., Eric C. Winther, and Lyle G. Fox. Development of a System-Wide Predator Control Program: Stepwise Implementation of a Predation Index, Predator Control Fisheries, and Evaluation Plan in the Columbia River Basin; Northern Pikeminnow Management Program, 2002 Annual Report. Office of Scientific and Technical Information (OSTI), January 2004. http://dx.doi.org/10.2172/842947.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Young, F. R. Development of a systemwide predator control program: Stepwise implementation of a predator index, predator control fisheries, and evaluation plan in the Columbia River basin (Northern Squawfish Management Program). Section 1: Implementation; Annual report 1995. Test accounts, April 1997. http://dx.doi.org/10.2172/10146957.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Porter, Russell. Report on the Predation Index, Predator Control Fisheries, and Program Evaluation for the Columbia River Basin Experimental Northern Pikeminnow Management Program, 2008 Annual Report. Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/966366.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Young, Franklin R. Development of a Systemwide Predator Control Program, Section II : Northern Squawfish Management Program Evaluation, 1995 annual report. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/11223.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Young, Franklin R. Development of a Systemwide Predator Control Program, Section II : Northern Squawfish Management Program Evaluation, 1996 annual report. Office of Scientific and Technical Information (OSTI), November 1997. http://dx.doi.org/10.2172/807818.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Predator management' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography