Gotowe bibliografie tematyczne / Foraging habitat

Gotowa bibliografia na temat „Foraging habitat”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 20 lutego 2023

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Artykuły w czasopismach na temat "Foraging habitat"

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Rambaldini, D. A., i R. M. Brigham. "Pallid bat (Antrozous pallidus) foraging over native and vineyard habitats in British Columbia, Canada". Canadian Journal of Zoology 89, nr 9 (wrzesień 2011): 816–22. http://dx.doi.org/10.1139/z11-053.

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Optimal foraging theory predicts organisms will forage in habitats providing the most profitable prey. Human alterations to ecosystems may affect predators’ foraging activity by changing landscape features, prey types, and prey availability. Assessing the selection of foraging habitats in a heterogeneous landscape can provide data to improve land management and conservation policies. In Canada, the pallid bat ( Antrozous pallidus (LeConte, 1856); Vespertilionidae) is listed as threatened partly because of loss or modification of shrub–steppe habitat. Our purpose was to determine if vineyards provide a suitable surrogate for foraging habitat relative to native habitat. We used pitfall traps to compare prey abundance in each habitat and analyzed faeces to assess diet composition. Over 24 nights, we surveyed both habitats for foraging bats. Bats foraged over vineyards, but we recorded significantly more foraging activity over native habitat. We collected over 2000 arthropods in pitfall traps and found significantly more in native habitat compared with vineyards. Species eaten by pallid bats were present in both habitats. Scarab beetles (Coleoptera: Scarabidae) and Jerusalem crickets (Orthopthera: Stenopelmatidae) represented the principal prey. The use of vineyards by pallid bats for foraging suggests that while they are adapting to a changing landscape, reduced prey abundance in vineyards may negatively affect them over the long term.
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Wei, Zhenhua, Meng Zheng, Lizhi Zhou i Wenbin Xu. "Flexible Foraging Response of Wintering Hooded Cranes (Grus monacha) to Food Availability in the Lakes of the Yangtze River Floodplain, China". Animals 10, nr 4 (27.03.2020): 568. http://dx.doi.org/10.3390/ani10040568.

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Wetlands are disappearing or degrading at an unprecedented rate due to the increase in human encroachment and disturbance, eventually leading to habitat loss for waterbirds, which is the primary cause of the decline in the Hooded Crane (Grus monacha) population. The Hooded Cranes have to constantly adjust their foraging strategies to survive to cope with this situation. In order to study how cranes respond to food resources in mosaic habitat, we surveyed a total of 420 food quadrats and 736 behavioral samples from three habitats during three wintering periods in Shengjin Lake and Caizi Lake. We measured temporal and between-habitat differences in foraging time budget, foraging frequency, and foraging success rate. Akaike’s information criterion was selected between the models of food abundance and availability. The results indicated that the wintering cranes spent the majority of their time (66.55%) foraging and shifted their foraging behaviors based upon food abundance and availability in different habitats. Our analyses also indicated that cranes were willing to forage more food with poor sediment penetrability in sub-optimal habitats. Foraging time budget was based on the food depth, and the foraging frequency and foraging success rate were based on food abundance. Cranes adopted flexible foraging strategies in response to the alternative food resources in mosaic wetland habitats, as it could mitigate the negative impacts of habitat loss and facilitate survival.
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Kuhn, C. E., R. R. Ream, J. T. Sterling, J. R. Thomason i R. G. Towell. "Spatial segregation and the influence of habitat on the foraging behavior of northern fur seals (Callorhinus ursinus)". Canadian Journal of Zoology 92, nr 10 (październik 2014): 861–73. http://dx.doi.org/10.1139/cjz-2014-0087.

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Central place foraging by colonial breeders can lead to depleted prey resources around breeding areas. Segregation of foraging areas both within and between large colonies may act as a mechanism to reduce competition for prey resulting in increased foraging success. We reassessed horizontal (spatial) foraging habitat segregation for northern fur seals (Callorhinus ursinus (L., 1758)) within and between colonies on the Pribilof Islands, Alaska (St. Paul and St. George islands), after the population declined by approximately 40%. Additionally, we examined vertical habitat segregation, where foraging ranges overlapped, and describe the influence of different foraging habitats on northern fur seal dive behavior. Spatial habitat segregation in northern fur seal foraging areas occurred between islands but was variable within islands, which is similar to the pattern previously described. There was no evidence for vertical habitat segregation when fur seals from different rookeries on St. George Island used the same foraging area. Additionally, fur seals from St. Paul Island rookeries that foraged in similar habitats showed fewer differences in dive behavior, indicating that foraging habitat plays a significant role in shaping dive behavior. The use of multiple foraging strategies within the Pribilof Island fur seal population could indicate that a complex management and conservation strategy may be necessary to stop the continuing decline of this population.
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Putera, Alexander Kurniawan Sariyanto, Dyah Perwitasari-Farajallah, Yeni Aryati Mulyani, Stanislav Lhota, Riki Herliansyah i Sodikin Sodikin. "Waterbird Foraging Habitat Selection in Balikpapan Bay: Water Depth and Patch Area as Important Factors". HAYATI Journal of Biosciences 28, nr 4 (29.09.2021): 312–24. http://dx.doi.org/10.4308/hjb.28.4.312-324.

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Balikpapan Bay is one of the wetlands providing potential foraging habitat for waterbirds in Indonesia. Potential habitat loss due to oil industry expansion, recent waterbird occurrence, and co-occurrence of two closely related species with similar foraging characteristics led to habitat selection. Habitat selection could be affected by food as an intrinsic factor and extrinsic factor, for example, accessibility to the physical and biological components of the habitat. This study aimed to measure the foraging habitat selection, identify significant habitat quality parameters for the habitat selection and predict the foraging habitat selection model. We used one-zero sampling for collecting foraging habitat selection data, corer sampling for prey data, and collecting the abiotic environment, and Generalized Linear Modelling (GLM) to build the model. We identified four species as the migrant Little Egret (Egretta garzetta), Great Egret (Ardea alba), Purple Heron (Ardea purpurea), and Lesser Adjutant (Leptoptilos javanicus). All species, except Purple Heron, selected foraging habitats. A simple mathematic model of foraging habitat selection was significantly affected by two factors: water depth and patch area. A large patch area may provide primary prey abundance for waterbirds, while a low water depth level may give easy access to the prey.
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Lombardini, Katia, Robert E. Bennetts i Christophe Tourenq. "Foraging Success and Foraging Habitat Use by Cattle Egrets and Little Egrets in the Camargue, France". Condor 103, nr 1 (1.02.2001): 38–44. http://dx.doi.org/10.1093/condor/103.1.38.

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Abstract We examined habitat use by Little Egrets (Egretta garzetta) and Cattle Egrets (Bubulcus ibis) that nest together in mixed-species colonies in the Camargue of southern France. We explored the relative use of seven habitat types in relation to their availability and tested the hypothesis that selection of habitat types was related to foraging success, with the prediction that increased foraging success in a given habitat corresponded with increased use of that habitat type. Ricefields and other agricultural habitats were used more than expected by Cattle Egrets, an invasive species in southern Europe; whereas Little Egrets, which are native to the Camargue, tended to select natural freshwater marshes and lagoons. Results were consistent with the hypothesis that increasing use of habitats corresponded with higher foraging success for both species. However, when this analysis was restricted to habitats with sufficient numbers of birds to enable estimates of biomass intake, the association was no longer apparent for Little Egrets.
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BUIJ, RALPH, NIKIE VAN DORST, HENRIËTTE F. SALOMONS, BARBARA M. CROES, MAURINE W. DIETZ i JAN KOMDEUR. "Response to habitat modification by foraging Dark-chanting Goshawks Melierax metabates in a West African savanna". Bird Conservation International 25, nr 3 (11.12.2014): 335–52. http://dx.doi.org/10.1017/s0959270914000112.

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SummaryAnthropogenic habitat alteration has probably contributed significantly to the decrease of raptor populations in West African savannas. To evaluate the impact of habitat degradation on foraging by sedentary Afrotropical raptors, we investigated the differences in microhabitat selection, foraging effort and energy returns between Dark-chanting Goshawks Melierax metabates inhabiting natural and transformed savannas in Cameroon. We expected that the agro-ecosystems in the transformed savannas have become unprofitable for Dark-chanting Goshawks due to scarcity of food resources. In both savanna types we radio-tracked six mated, adult males during the non-breeding season and determined foraging effort, by time spent at each perch and distance covered between perches, and energy intake through estimation of the energy value of prey items. Goshawks in natural habitats had smaller home-ranges and exploited their range more intensively than Goshawks in transformed habitats. In both natural and transformed habitats, Goshawks selected foraging patches with comparatively tall trees, underlining their importance to foraging Goshawks. The extent of shrub and herbaceous layer cover, agriculture cover, and tree density were other important predictors of foraging patch use, but their importance differed between habitats. The extent of shrub, herbaceous layer and agriculture cover were positively associated with foraging patch use in transformed habitats, suggesting that cultivated fields and ground vegetation support important prey resources for Goshawks in agro-ecosystems. The composition of broad prey categories to the diet, foraging effort and returns were comparable between habitats. However, we found indications that the proportion of heavy-bodied lizard species among reptile prey items was higher in natural than transformed habitats, whereas on average smaller lizards were more commonly caught in the latter. Mean herbaceous layer height and tree density within home ranges, both higher in natural habitat, were negatively related to prey capture rates. Tree clearance and livestock grazing thus favored greater prey capture rates in transformed habitat, offsetting a lower meal energy value compared to natural habitat. We conclude that foraging Dark-chanting Goshawks may cope with moderate land transformation, but practices focused on conservation of tall trees and ground vegetation cover would be beneficial by maintaining important prey resources and their exploitability under growing land pressure.
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Kirk, Molly K., Daniel Esler i W. Sean Boyd. "Foraging effort of Surf Scoters (Melanitta perspicillata) wintering in a spatially and temporally variable prey landscape". Canadian Journal of Zoology 85, nr 12 (grudzień 2007): 1207–15. http://dx.doi.org/10.1139/z07-105.

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We monitored foraging effort of radio-tagged Surf Scoters (Melanitta perspicillata (L., 1758)) in three different habitats: (1) shellfish farm structures with high densities of mussels and strong seasonal prey depletion, (2) soft-bottom clam beds with more stable but less available prey, and (3) rocky intertidal beds with moderate mussel densities and depletion rates. We predicted that foraging effort would vary uniquely by habitat, with effort increasing more where depletion was strongest. However, variation in both hourly and daily foraging efforts was best explained by date only. Effort per hour was lowest in early December (presumably owing to very high prey abundance), increased until mid-February as prey declined, and then decreased again in March (probably owing to increased daylight time for foraging). Foraging effort estimated over a full day increased steadily from December to March as prey were depleted. Temporal patterns of effort did not vary by habitat after accounting for seasonal effects. Instead of increasing foraging effort in habitats with strong depletion, Surf Scoters redistributed to habitats with lower degrees of prey reduction as the season progressed. We suggest that Surf Scoters respond to variation in prey by adjusting both foraging effort and habitat selection as the prey landscape changes.
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Groff, Luke A., Aram J. K. Calhoun i Cynthia S. Loftin. "Amphibian terrestrial habitat selection and movement patterns vary with annual life-history period". Canadian Journal of Zoology 95, nr 6 (czerwiec 2017): 433–42. http://dx.doi.org/10.1139/cjz-2016-0148.

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Identification of essential habitat is a fundamental component of amphibian conservation; however, species with complex life histories frequently move among habitats. To better understand dynamic habitat use, we evaluated Wood Frog (Lithobates sylvaticus (LeConte, 1825)) habitat selection and movement patterns during the spring migration and foraging periods and described the spatiotemporal variability of habitats used during all annual life-history periods. We radio-tracked 71 frogs in Maine during 2011–2013 and evaluated spring migration, foraging activity center (FAC), and within-FAC habitat selection. Telemetered frogs spent the greatest percentage of each field season in hibernacula (≥54.4%), followed by FACs (≥25.5%), migration habitat (≥16.9%), and breeding sites (≥4.5%). FACs ranged 49 – 1 335 m2 (568.0 ± 493.4 m2) and annual home ranges spanned 1 413 – 32 165 m2 (11 780.6 ± 12 506.1 m2). During spring migration, Wood Frogs exhibited different movement patterns (e.g., turn angles), selected different habitat features, and selected habitat features less consistently than while occupying FACs, indicating that the migration and foraging periods are ecologically distinct. Habitat-use studies that do not discriminate among annual life-history periods may obscure true ecological relationships and fail to identify essential habitat necessary for sustaining amphibian populations.
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Moe, T. F., J. Kindberg, I. Jansson i J. E. Swenson. "Importance of diel behaviour when studying habitat selection: examples from female Scandinavian brown bears (Ursus arctos)". Canadian Journal of Zoology 85, nr 4 (kwiecień 2007): 518–25. http://dx.doi.org/10.1139/z07-034.

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The goal of habitat selection studies is to identify important habitats for a particular species. However, most studies using radiotelemetry have focused on habitat-selection patterns using daytime positions only. We used 24 h data from six female brown bears ( Ursus arctos L., 1758) equipped with GPS–GSM collars and activity loggers to analyse variations in habitat selection related to diel variations in activity (foraging and resting). We found that the bears rested mainly during the daylight hours and foraged mainly during the crepuscular and nocturnal hours. The bears selected habitats differently when they were resting than when they were foraging. We found no selection for tall coniferous forest using all data, but this habitat was selected by resting bears and avoided by foraging bears. Thus, for studies of habitat selection, our results show the importance of obtaining data from all 24 h and dividing these data into relevant categories based on the diel activity pattern of the studied species.
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Robinson, D. "Habitat use and foraging behaviour of the scarlet robin and the flame robin at a site of breeding-season sympatry". Wildlife Research 19, nr 4 (1992): 377. http://dx.doi.org/10.1071/wr9920377.

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The habitat selection and foraging ecology of scarlet robins (Petroica multicolor) and flame robins (Petroica phoenicea) were observed for three years at a site of breeding-season sympatry in order to examine seasonal patterns of foraging behaviour, habitat and resource use, and the significance of competition for food as a cause of interspecific aggression. Both species occupied habitats with open ground layers of grass or bark, and a sparse shrub-and-sapling layer. Flame robins occupied more mesic habitats; scarlet robins occurred in drier habitats. Seven habitat variables provided 73% separation between habitats occupied by the two species of robin. Both species foraged mostly on the ground during the cooler months. In summer and autumn, scarlet robins became snatchers of arthropods from bark and foliage substrates, and flame robins hawked for flying insects close to the ground. High overlap between their use of available foraging space, especially vertical foraging space, probably caused interspecific competition for food and space, leading to interspecific aggression and territorial behaviour. Such competition, in conjunction with the flame robin's interspecific dominance and apparently greater resilience to practices such as timber harvesting, may cause long-term changes to the distribution and relative abundance of each species. Recommendations for habitat management are considered briefly.
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Rozprawy doktorskie na temat "Foraging habitat"

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Dalla, Rosa Luciano. "Modeling the foraging habitat of humpback whales". Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/23486.

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Knowing how species will respond to environmental variability and climate change requires understanding the factors that influence their distribution and movement patterns. I investigated the processes that drive individuals to concentrate in specific areas of their home range by modeling encounter rates of humpback whales (Megaptera novaeangliae) in relation to environmental variables using GIS tools, generalized additive models, and remote sensing and in situ data. I conducted this work at two foraging areas: the coastal waters of British Columbia, Canada, and the Bransfield and Gerlache Straits, Antarctica. Humpback whales in British Columbia were strongly associated with latitude and bathymetric features. The relationships with remotely sensed variables reflecting primary productivity were not consistent, but higher numbers of whales seemed to be associated with higher productivity. In fact, the highest concentrations of humpback whales appeared to reflect areas where concentration and retention processes lead to higher biological productivity, including south Dixon Entrance, middle and southwestern Hecate Strait and off Juan de Fuca Strait. Humpback whales in the Southern Ocean also preferred areas of enhanced biological productivity. In Gerlache Strait, humpback whales were associated with areas of higher chlorophyll-a concentration in the central and northern sections of the strait, which also corresponded to relatively higher temperatures and shallower mixed layer depths for the in situ data. In Bransfield Strait, humpback whales appeared to prefer the near-frontal zones and the deep basins, where surface waters are influenced by the Bransfield Current. Interannual variability in both humpback and minke whale encounter rates in Gerlache Strait was correlated with the Oceanic Niño Index, the oceanic component of ENSO. In addition to investigating species-habitat relationships with statistical models, I conducted the first study to describe the satellite-monitored movements of humpback whales on their feeding grounds along the Antarctic Peninsula. Results showed considerable individual variation in direction, speed and range of movements, and an overall pattern characterized by short- and long-distance movements between presumed foraging areas with relatively short residency times. All told, the results of my research show that humpback whale distribution within foraging habitat is influenced by physical and biological variables that enhance biological productivity.
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Gilbert, Andrew. "The Foraging and Habitat Ecology of Black Terns in Maine". Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/GilbertAT2001.pdf.

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Convery, Ken M. "Assessing Habitat Quality for the Endangered Red-cockaded Woodpcker". Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/10136.

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This project had 2 major objectives. The first objective was to assess how well the revised U.S. Fish and Wildlife Service Foraging Habitat Guidelines depict good quality habitat for the red-cockaded woodpecker (Picoides borealis) at Camp Lejeune, NC. To accomplish this, I used multiple linear and logistic regression to examine the relationships between fitness, habitat use, home range size, and habitat characteristics described in the guidelines. I assumed that habitat characteristics that confer quality were related to higher fitness, greater habitat use, and reduced home range size. To a large extent, the guidelines are validated. Red-cockaded woodpeckers responded favorably to habitat that mimics the historical, mature, and fire-maintained pine forests of the southeastern U.S., characterized by high densities of large pines, low densities of small and medium pines, and a lush herbaceous groundcover. Variables positively associated with habitat use and fitness were associated with reduced home range size, and those negatively associated with habitat use and fitness with increased home range size. Percent herbaceous groundcover was a significant regressor indicative of quality in every model. The second objective was to assess how well USFWS foraging partitions represent habitat used by red-cockaded woodpeckers. I conducted home range follows of 23 groups of red-cockaded woodpeckers and estimated the percentage of each home range encompassed by partitions of varying radii. The percentage of the actual home range included in the partition increased as a function of partition radius. The standard 800 m circular partition, on average, included 91% of the home range, but significant variation existed between groups.
Master of Science
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Convery, Ken. "Assessing Habitat Quality for the Endangered Red-cockaded Woodpcker". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/10136.

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This project had 2 major objectives. The first objective was to assess how well the revised U.S. Fish and Wildlife Service Foraging Habitat Guidelines depict good quality habitat for the red-cockaded woodpecker (Picoides borealis) at Camp Lejeune, NC. To accomplish this, I used multiple linear and logistic regression to examine the relationships between fitness, habitat use, home range size, and habitat characteristics described in the guidelines. I assumed that habitat characteristics that confer quality were related to higher fitness, greater habitat use, and reduced home range size. To a large extent, the guidelines are validated. Red-cockaded woodpeckers responded favorably to habitat that mimics the historical, mature, and fire-maintained pine forests of the southeastern U.S., characterized by high densities of large pines, low densities of small and medium pines, and a lush herbaceous groundcover. Variables positively associated with habitat use and fitness were associated with reduced home range size, and those negatively associated with habitat use and fitness with increased home range size. Percent herbaceous groundcover was a significant regressor indicative of quality in every model. The second objective was to assess how well USFWS foraging partitions represent habitat used by red-cockaded woodpeckers. I conducted home range follows of 23 groups of red-cockaded woodpeckers and estimated the percentage of each home range encompassed by partitions of varying radii. The percentage of the actual home range included in the partition increased as a function of partition radius. The standard 800 m circular partition, on average, included 91% of the home range, but significant variation existed between groups.
Master of Science
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Walsh, Allyson Louise. "Foraging habitat, weather and the conservation of bats in Britain". Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294573.

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Nelson, Josiah. "Habitat Use and Foraging Ecology of Bats in North Dakota". Diss., North Dakota State University, 2016. http://hdl.handle.net/10365/25849.

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Habitat use is a key component to understanding the conservation needs of species. While an array of quantitative analyses for studying fine-scale habitat use and selection have been developed, such methods have rarely been applied to bat species, with most work focused at a broad scale or using qualitative methods. Insectivorous bat communities face major threats from habitat conversion, exploitation of natural resources, and the impending spread of white-nose syndrome. Hence, detailed knowledge of their habitat needs is critical for developing effective management plans. In North Dakota, little was known about local bat populations prior to 2009, with essentially no knowledge of habitat associations and preferences of bat species. The overall objective of this research was to survey habitats across North Dakota to document species occurrences within key ecological regions and to assess the influence of fine-scale habitat characteristics on community diversity and foraging patterns. We further aimed to assess the foraging habitat selection of little brown bats, Myotis lucifugus, a species of conservation concern. Our specific objectives were to: 1) assess species? occurrence and distributions within North Dakota; 2) assess the influence of habitat and the availability of water resources on species diversity and community-level foraging activity; 3) identify habitats associated with areas of high foraging activity; 4) identify indicator species that characterize key habitats; 5) assess foraging habitat selection of female M. lucifugus; 6) and assess individual variation in habitat selection of M. lucifugus. From 2009 to 2012, mist netting and acoustic surveys were conducted to document species occurrence at 68 sites. From 2012 to 2015, targeted acoustic surveys were conducted at 37 sites to assess foraging activity levels in variable habitats. In 2014 and 2015, data-logging telemetry receivers were used to assess foraging habitat selection of M. lucifugus. The presence of 11 species was confirmed in the state. We found that bat community diversity and foraging activity were influenced by fine-scale habitat characteristics. M. lucifugus selected for edge habitats and nearby water sources. These results will be valuable for the conservation and management of bats and provide baseline information for future research on habitat use of bats.
North Dakota Game and Fish Department
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Berkelman, James. "Habitat Requirements and Foraging Ecology of the Madagascar Fish-Eagle". Diss., Connect to this title online, 1997. http://scholar.lib.vt.edu/theses/available/etd-5852152749721461/.

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Hall, Anna Marie. "Foraging behaviour and reproductive season habitat selection of northeast pacific porpoises". Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37218.

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Behavioural observations are fundamental to understanding and defining the habitat needs of animals. I compiled the behavioural repertoires reported for harbour (Phocoena phocoena) and Dall’s porpoise (Phocoenoides dalli) by classifying the life processes of phocoenids into 12 descriptive categories. This range-wide review revealed complex sexual and social behaviours, similar foraging behaviours and breeding site fidelity, as well as differences in habitat selection between these two northern hemisphere species. I also conducted a fine-scale field study of harbour porpoise foraging behaviour at two sites in Juan de Fuca Strait (British Columbia) using point transect survey data (2007–2008), and platforms of opportunity data (1995–1996, 1998–2008) to determine the physical conditions under which harbour porpoise foraged and the extent to which they displayed specialised behaviours. I examined harbour porpoise presence, density and group sizes relative to tidal currents, tidal variation, lunar phase, lunar position, solar position, diurnality, seasonality and presence of conspecifics—and found that greater numbers of harbour porpoise occurred on the ebb current during the spring tides. Numbers of porpoise increased three-fold between April and October, when calves and high-energy behaviours were also more prevalent. To identify porpoise breeding habitat in the inland waters of southern British Columbia and northwestern Washington, I used systematically and opportunistically collected sightings of harbour and Dall’s porpoise (1991–2008), and compared group sizes and frequency of occurrences for both species relative to bathymetry and tidal speeds. Overall, I found that both species selected bathymetrically differentiated habitats that were characterized by high rates of tidal mixing (with harbour porpoise preferring regions ≤100 m, and Dall’s porpoise preferring 151 – 250 m). Spatial analysis identified two separate areas that may be species-specific breeding habitats—the first to be identified for either species in this region. In summary, harbour porpoise maintained stable group sizes and used tidally well-mixed foraging sites on a temporary but predictable basis. Dall’s porpoise were associated with these same areas, but habitat partitioning associated with differences in bathymetry occurred in important breeding areas that may account for the coastal parapatric distribution of these two high trophic level predators.
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Vaughan, Nancy. "Partitioning of foraging habitat resources among bats (Chiroptera) in Great Britain". Thesis, University of Bristol, 1996. http://hdl.handle.net/1983/5dae8611-bacc-4ff5-a3dc-49f7e3d1131f.

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Ribeiro, Emanuel Ferreira. "Seasonal variation in foraging habitat preferences in Lesser Kestrel Falco naumanni". Master's thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/720.

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Conhecer as preferências de habitat de uma espécie é crucial para a definição e implementação de medidas com objectivos de conservação. Neste estudo analisamos a preferência de habitat de caça de uma espécie ameaçada, e a maneira como estas preferências se alteram ao longo da época de reprodução. A disponibilidade de cada tipo de habitat varia consoante as actividades agrícolas, como sementeiras, aragem ou ceifas. Os resultados evidenciam que esta espécie selecciona diferentes tipos de habitat de acordo em cada fase do ciclo reprodutor. No início da época de reprodução, a espécie, prefere caçar em terrenos arados enquanto que no final prefere campos de cereais já ceifados nesta fase, e onde apenas há restolhos. As diferenças observadas não seriam detectadas caso não se considerassem as alterações de habitat inerentes às actividades agrícolas. Os Francelhos preferem caçar em habitats com vegetação baixa e pouco densa provavelmente devido à maior disponibilidade de presas neste tipo de habitats. Machos e fêmeas não apresentam diferenças significativas em parâmetros de caça como a taxa de êxito ou o tempo de caça necessário para capturar uma presa. A taxa de êxito foi mais elevada em restolhos e no período incubação e mais baixa em terrenos arados e durante o período de pré-incubação. As aves despendem menos tempo para efectuar um primeiro ataque em cereal e do que em plantações de algodão. Em plantações de cereais é necessário menos tempo para capturar uma presa enquanto que nos algodoais é necessário um maior esforço de caça. O número de ataques por minuto de observação não é significativamente diferente entre biótopos.
Knowing the habitat preference of a species is of crucial importance in order to sketch measures with conservational purposes. In this study we analyse the foraging habitat preferences of a threatened species and how they change through the breeding season. Habitat availability varies due to changes in agricultural activities such as ploughing, sowing, or harvesting. Our results evidence that this species select different habitat types according to breeding season stage. In the beginning of the season prefer to forage in ploughed fields while during chick rearing and post-fledging prefer cotton fields and cereal stubbles. Thus changes in agricultural activities must be considered in habitat selection studies. Lesser kestrels prefer to forage in low height and sparse cover, probably because of higher prey availability in this kind of habitats. Males and females don’t show significant differences in several hunting parameters. Success rate was higher in cereal stubble and during incubation and lower in ploughed fields and in the pre-incubation period. Lesser kestrels take less time to make a strike in cereal stubble and more in cotton plantations. In cereals prey capture takes less time while in cotton takes more hunting effort. The number of strikes per minute of observation didn’t varied significantly between habitats.
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Książki na temat "Foraging habitat"

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Hooper, Robert G. Forest stands selected by foraging red-cockaded woodpecker. Asheville, NC: U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1986.

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Hooper, Robert G. Forest stands selected by foraging red-cockaded woodpeckers. [Asheville, N.C.]: U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1986.

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Johnson, Joshua B. Notes on foraging activity of female Myotis leibii in Maryland. Newtown Square, PA: U.S. Dept. of Agriculture, Forest Service, Northern Research Station, 2009.

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Uresk, Daniel W. Vegetative characteristics of swift fox denning and foraging sites in southwestern South Dakota. Fort Collins, CO: Rocky Mountain Research Station, 2003.

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Esque, Todd C. Nutrition and foraging ecology of the desert tortoise: FY 1989 annual report. Fort Collins, Colo: U.S. Fish and Wildlife Service, National Ecology Research Center, 1990.

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Esque, Todd C. Nutrition and foraging ecology of the desert tortoise: FY 1990 annual report. Fort Collins, Colo: U.S. Fish and Wildlife Service, National Ecology Research Center, 1991.

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Beatley, Timothy. Taming the wild mushroom: A culinary guide to market foraging. Austin: University of Texas Press, 1993.

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Feasting and foraging in Costa Rica: A comprehensive food and restaurant guide. Costa Rica: Café Britt, 2008.

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Leonard, Jerome Patrick. Nesting and foraging ecology of band-tailed pigeons in western Oregon. 1998.

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Blakely, Kevin L. Foraging ecology of California quail and response of key foods to habitat manipulations in western Oregon. 1989.

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Części książek na temat "Foraging habitat"

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Uetz, G. W. "Habitat structure and spider foraging". W Habitat Structure, 325–48. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3076-9_16.

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Meire, P. M. "Foraging Behavior of Some Wintering Waders: Prey-Selection and Habitat Distribution". W Foraging Behavior, 215–37. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1839-2_6.

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Cassini, Marcelo, Mariela Borgnia, Yanina Arzamendia, Verónica Benítez i Bibiana Vilá. "Sociality, Foraging and Habitat Use by Vicuña". W The Vicuña, 35–48. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-09476-2_4.

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Burger, Joanna, i Michael Gochfeld. "Global Warming, Sea Level Rise, and Suitable Nesting and Foraging Habitat". W Habitat, Population Dynamics, and Metal Levels in Colonial Waterbirds, 197–226. Boca Raton : Taylor & Francis, 2016. | Series: CRC marine science series ; 36: CRC Press, 2016. http://dx.doi.org/10.1201/9780429159435-9.

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Wells, Randall S. "Common Bottlenose Dolphin Foraging: Behavioral Solutions that Incorporate Habitat Features and Social Associates". W Ethology and Behavioral Ecology of Odontocetes, 331–44. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16663-2_15.

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Barbaro, Luc, Laurent Couzi, Vincent Bretagnolle, Julien Nezan i Fabrice Vetillard. "Multi-scale habitat selection and foraging ecology of the eurasian hoopoe (Upupa epops) in pine plantations". W Topics in Biodiversity and Conservation, 149–63. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-90-481-2807-5_8.

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Barreto, Guillermo R., i Rúben D. Quintana. "Foraging Strategies and Feeding Habits of Capybaras". W Capybara, 83–96. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4000-0_4.

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Delaplane, Keith S. "What makes a good pollinator?" W Crop pollination by bees, Volume 1: Evolution, ecology, conservation, and management, 25–39. Wyd. 2. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781786393494.0003.

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Abstract This chapter discusses pollinator efficiency; pollination performance (from the perspective of the bee); pollinator dependency (from the perspective of the plant), including topics on breeding systems, as well as flower and fruit morphology; and pollinator performance (from the perspective of foraging ecology), including the taxon-based differences in bee flight distance, morphological considerations, and forager behaviour in rich and poor habitats.
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Chapman, M. G. "Variability of foraging in highshore habitats: dealing with unpredictability". W Life at Interfaces and Under Extreme Conditions, 75–87. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4148-2_7.

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Janssen, Marco A., i Kim Hill. "An Agent-Based Model of Resource Distribution on Hunter-Gatherer Foraging Strategies: Clumped Habitats Favor Lower Mobility, but Result in Higher Foraging Returns". W Computational Social Sciences, 159–74. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31481-5_3.

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Streszczenia konferencji na temat "Foraging habitat"

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Maurer, Corina, Laura Bosco, Elisabeth Klaus, Franziska Arnold, Beatrice Schranz, Raphael Arlettaz i Alain Jacot. "Effects of habitat fragmentation on bumblebee foraging trip duration and colony fitness". W 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107356.

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Trounce, Krista, Orla Robinson, Alex MacGillivray, David Hannay, Jason Wood, Dominic Tollit i Ruth Joy. "The effects of vessel slowdowns on foraging habitat of the southern resident killer whales". W 2019 International Congress on Ultrasonics. ASA, 2019. http://dx.doi.org/10.1121/2.0001230.

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Gundersen, Knute. "Effects of habitat enhancement on bumble bee (Bombus spp.) foraging preferences and common eastern bumble bee (Bombus impatiens) population density". W 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113846.

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Lalitha, S., i Aniruddha Bhattacharya. "Risk-informed security constrained optimal power flow inspired by the foraging habits of social spiders". W 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT). IEEE, 2016. http://dx.doi.org/10.1109/iceeot.2016.7755382.

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Raporty organizacyjne na temat "Foraging habitat"

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McKellar, Ann E., Dylan C. Kesler, Robert J. Mitchell, David K. Delancy i Jeffrey R. Walters. Range-Wide Meta-Analysis of Red-Cockaded Woodpecker Foraging Habitat Suitability. Fort Belvoir, VA: Defense Technical Information Center, grudzień 2013. http://dx.doi.org/10.21236/ada595002.

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Baumann-Pickering, Simone, John A. Hildebrand i Tina Yack. Modeling of Habitat and Foraging Behavior of Beaked Whales in the Southern California Bight. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2012. http://dx.doi.org/10.21236/ada573309.

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Baumann-Pickering, Simone, John A. Hildebrand, Tina Yack i Jeffrey E. Moore. Modeling of Habitat and Foraging Behavior of Beaked Whales in the Southern California Bight. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2013. http://dx.doi.org/10.21236/ada598666.

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Baumann-Pickering, Simone, John A. Hildebrand, Tina Yack i Jeffrey E. Moore. Modeling of Habitat and Foraging Behavior of Beaked Whales in the Southern California Bight. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2014. http://dx.doi.org/10.21236/ada618169.

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Arnould, John P. Using Animal-Borne Cameras to Quantify Prey Field, Habitat Characteristics and Foraging Success in a Marine Top Predator. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2010. http://dx.doi.org/10.21236/ada541895.

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Arnould, John P. Using Animal-Borne Cameras to Quantify Prey Field, Habitat Characteristics and Foraging Success in a Marine Top Predator. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2012. http://dx.doi.org/10.21236/ada573143.

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Arnould, John P. Using Animal-Borne Cameras to Quantify Prey Field, Habitat Characteristics and Foraging Success in a Marine Top Predator. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2011. http://dx.doi.org/10.21236/ada598114.

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Geisthardt, Eric, Burton Suedel i John Janssen. Monitoring the Milwaukee Harbor breakwater : an Engineering With Nature® (EWN®) demonstration project. Engineer Research and Development Center (U.S.), marzec 2021. http://dx.doi.org/10.21079/11681/40022.

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The US Army Corps of Engineers (USACE) maintains breakwaters in Milwaukee Harbor. USACE’s Engineering With Nature® (EWN®) breakwater demonstration project created rocky aquatic habitat with cobbles (10–20 cm) covering boulders (6–8 metric tons) along a 152 m section. A prolific population of Hemimysis anomala, an introduced Pontocaspian mysid and important food source for local pelagic fishes, was significantly (p < .05) more abundant on cobbles versus boulders. Food-habits data of alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax) provided evidence that H. anomala were a common prey item. Night surveys and gill netting confirmed O. mordax preferred foraging on the cobbles (p < .05) and consumed more H. anomala than at the reference site (p < .05). H. anomala comprised a significant portion of the diets of young-of-the-year (YOY) yellow perch (Perca flavescens), YOY largemouth bass (Micropterus salmoides), and juvenile rock bass (Ambloplites rupestris) caught on the breakwater. The natural features’ construction on the breakwater increased the available habitat for this benthopelagic macroinvertebrate and created a novel ecosystem benefiting forage fish and a nursery habitat benefiting nearshore game fish juveniles. These data will encourage the application of EWN concepts during structural repairs at other built navigation infrastructure.
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Nowacek, Douglas P., Louis St. Laurent, David J. Moretti i Patrick N. Halpin. Prey Fields and Habitat of Deep Divers: 3D Characterization and Modeling of Beaked and Sperm Whale Foraging Areas in the Tongue of the Ocean. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2009. http://dx.doi.org/10.21236/ada531174.

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Nowacek, Douglas P., Louis St. Laurent, David J. Moretti i Patrick N. Halpin. Prey Fields and Habitat of Deep Diving Odontocetes: 3D Characterization and Modeling of Beaked and Sperm Whale Foraging Areas in the Tongue of the Ocean. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2012. http://dx.doi.org/10.21236/ada573676.

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