Gotowe bibliografie tematyczne / Fish populations

Gotowa bibliografia na temat „Fish populations”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 29 lipca 2024

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Artykuły w czasopismach na temat "Fish populations"

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CUSHING, D. H. "Understanding fish populations". Journal of Biogeography 25, nr 3 (maj 1998): 610–11. http://dx.doi.org/10.1046/j.1365-2699.1998.25306093.x.

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Simpson, S. D., I. Barber i I. J. Winfield. "Understanding fish populations". Journal of Fish Biology 92, nr 3 (marzec 2018): 563–68. http://dx.doi.org/10.1111/jfb.13574.

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Minto, Coilín, Ransom A. Myers i Wade Blanchard. "Survival variability and population density in fish populations". Nature 452, nr 7185 (marzec 2008): 344–47. http://dx.doi.org/10.1038/nature06605.

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Chilcote, M. W., K. W. Goodson i M. R. Falcy. "Reduced recruitment performance in natural populations of anadromous salmonids associated with hatchery-reared fish". Canadian Journal of Fisheries and Aquatic Sciences 68, nr 3 (marzec 2011): 511–22. http://dx.doi.org/10.1139/f10-168.

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We found a negative relationship between the reproductive performance in natural, anadromous populations of steelhead trout ( Oncorhynchus mykiss ), coho salmon ( O. kisutch ), and Chinook salmon ( O. tshawytscha ), and the proportion of hatchery fish in the spawning population. We used intrinsic productivity as estimated from fitting a variety of recruitment models to abundance data for each population as our indicator of reproductive performance. The magnitude of this negative relationship is such that we predict the recruitment performance for a population composed entirely of hatchery fish would be 0.128 of that for a population composed entirely of wild fish. The effect of hatchery fish on reproductive performance was the same among all three species. Further, the impact of hatchery fish from “wild type” hatchery broodstocks was no less adverse than hatchery fish from traditional, domesticated broodstocks. We also found no support for the hypothesis that a population's reproductive performance was affected by the length of exposure to hatchery fish. In most cases, measures that minimize the interactions between wild and hatchery fish will be the best long-term conservation strategy for wild populations.
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Hindar, Kjetil, Nils Ryman i Fred Utter. "Genetic Effects of Cultured Fish on Natural Fish Populations". Canadian Journal of Fisheries and Aquatic Sciences 48, nr 5 (1.05.1991): 945–57. http://dx.doi.org/10.1139/f91-111.

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This paper addresses the genetic consequences of aquaculture on natural fish populations. The study is motivated by rapidly increasing numbers of intentionally and accidentally released fish and is based on empirical observations reported in the literature. A wide variety of outcomes, ranging from no detectable effect to complete introgression or displacement, has been observed following releases of cultured fish into natural settings. Where genetic effects on performance traits have been documented, they always appear to be negative in comparison with the unaffected native populations. These findings are consistent with theoretical considerations of the implications of elevated levels of gene flow between cultured and locally adapted natural populations; they raise concerns over the genetic future of many natural populations in the light of increasing numbers of released fish. Strategies for the genetic protection of native populations from the effects of aquaculture are outlined including more secure containment, the use of sterilized fish, and modifying the points of rearing and release. We recommend strong restrictions on gene flow from cultured to wild populations and effective monitoring of such gene flow.
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Šunderić, Miloš, Dragana Robajac, Nikola Gligorijević, Goran Miljuš, Olgica Nedić, Katarina Smilkov, Darinka Gjorgieva Ackova, Vesna Rudić-Grujić i Ana Penezić. "Is There Something Fishy About Fish Oil?" Current Pharmaceutical Design 25, nr 15 (19.08.2019): 1747–59. http://dx.doi.org/10.2174/1381612825666190705185800.

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Background: Fish is consumed as food worldwide and is considered as a rich source of essential nutrients required for a healthy life. Supplementation with fish oil has been adopted as a solution to prevent or cure many pathophysiological states and diseases by both the professionals and the civil population. The beneficial effects are, however, being questioned, as some controversial results were obtained in clinical and population studies. Methods: Critical evaluation of studies regarding known effects of fish oil, both in favour of its consumption and related controversies. Results: From the literature review, contradictory allegations about the positive action of the fish oil on human health emerged, so that a clear line about its beneficial effect cannot be withdrawn. Conclusion: Scientific results on the application of fish oil should be taken with caution as there is still no standardised approach in testing its effects and there are significantly different baselines in respect to nutritional and other lifestyle habits of different populations.
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Le Cam, Sabrina, Charles Perrier, Anne-Laure Besnard, Louis Bernatchez i Guillaume Evanno. "Genetic and phenotypic changes in an Atlantic salmon population supplemented with non-local individuals: a longitudinal study over 21 years". Proceedings of the Royal Society B: Biological Sciences 282, nr 1802 (7.03.2015): 20142765. http://dx.doi.org/10.1098/rspb.2014.2765.

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While introductions and supplementations using non-native and potentially domesticated individuals may have dramatic evolutionary effects on wild populations, few studies documented the evolution of genetic diversity and life-history traits in supplemented populations. Here, we investigated year-to-year changes from 1989 to 2009 in genetic admixture at 15 microsatellite loci and in phenotypic traits in an Atlantic salmon ( Salmo salar ) population stocked during the first decade of this period with two genetically and phenotypically distinct source populations. We detected a pattern of temporally increasing introgressive hybridization between the stocked population and both source populations. The proportion of fish returning to the river after a single winter at sea ( versus several ones) was higher in fish assigned to the main source population than in local individuals. Moreover, during the first decade of the study, both single-sea-winter and multi-sea-winter (MSW) fish assigned to the main source population were smaller than local fish. During the second decade of the study, MSW fish defined as hybrids were lighter and smaller than fish from parental populations, suggesting outbreeding depression. Overall, this study suggests that supplementation with non-local individuals may alter not only the genetic diversity of wild populations but also life-history traits of adaptive significance.
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Tyler, A. V. "Dynamics of Marine Fish Populations". Transactions of the American Fisheries Society 117, nr 1 (1.01.1988): 95–101. http://dx.doi.org/10.1577/1548-8659-117.1.95.

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Crisp, D. T., i W. R. C. Beaumont. "Fish populations in Plynlimon streams". Hydrology and Earth System Sciences 1, nr 3 (30.09.1997): 541–48. http://dx.doi.org/10.5194/hess-1-541-1997.

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Abstract. In Plynlimon streams, brown trout (Salmo trutta L.) are widespread in the upper Wye at population densities of 0.03 to 0.32 fish m-2 and show evidence of successful recruitment in most years. In the upper Severn, brown trout are found only in an area of c. 1670 -2 downstream of Blaenhafren Falls at densities of 0.03 to 0.24 fish -2 and the evidence suggests very variable year to year success in recruitment (Crisp & Beaumont, 1996). Analyses of the data show that temperature differences between afforested and unafforested streams may affect the rates of trout incubation and growth but are not likely to influence species survival. Simple analyses of stream discharge data suggest, but do not prove, that good years for recruitment in the Hafren population were years of low stream discharge. This may be linked to groundwater inputs detected in other studies in this stream. More research is needed to explain the survival of the apparently isolated trout population in the Hafren.
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González-de-Canales, M. L. "Saprolegniasis In Wild Fish Populations". Ciencias Marinas 27, nr 1 (1.02.2001): 125–37. http://dx.doi.org/10.7773/cm.v27i1.373.

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Rozprawy doktorskie na temat "Fish populations"

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Durrant, Christopher. "Effects of metal contamination on fish populations". Thesis, King's College London (University of London), 2010. http://kclpure.kcl.ac.uk/portal/en/theses/effects-of-metal-contamination-on-fish-populations(cd690b4f-265d-48cd-805e-c561e411b370).html.

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Nicol, Elizabeth. "Long-term effects of oestrogenic effluent exposure on wild fish populations". Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10826.

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Freshwater streams in the developed world are becoming increasingly dominated by treated wastewater. Continually discharged into most surface waters, these effluents contain a suite of bioactive man-made chemicals, including steroid and non-steroid oestrogens, which have been found to feminise male fish, skew sex ratios, and cause reproductive failure. However, the consequences of reproductive disruption remain poorly explored at the population level. This thesis was initiated to evaluate how oestrogenic contaminants might influence the population ecology of a common cyprinid, the roach (Rutilus rutilus). An investigation encompassing population structure, multigenerational exposure and the role of additional drivers of fish population dynamics was undertaken to contextualise the effects of oestrogenic effluents on wild fish populations. Population genetic analysis of UK roach found they exhibit moderately high levels of genetic diversity and significant intra-river genetic structure. Genetically differentiated local subpopulations indicate little interbreeding and limited gene flow, consistent with a typical metapopulation that has not been homogenised by restocking. Similarly, my thesis demonstrates no significant relationship between effluent exposure and Ne (effective population size) or genetic diversity of roach populations, albeit a 65% reduction in Ne is possible at highly polluted sites. River stretches contaminated with high levels of effluent can support breeding populations, which recruit successfully with minimal immigration from less contaminated sites. Multigenerational effects of effluent exposure on roach were also evaluated experimentally using reproductive success from breeding adults over three generations. Lifelong exposure to 100% treated effluent resulted in feminised phenotypes (ovarian cavities and intersex condition) in males but no observable effect on females. Additionally, despite gonadal disruption in males and effluent exposure of their mothers, I found no detrimental effect on their ability to compete with control fish. Instead, reproductive success was primarily determined by body size. A novel approach considering additional fish population drivers suggests that genetic diversity and species diversity decline in parallel with an increasing presence of disturbed land, when combined with geographical isolation. In conclusion, group assemblage and genetic structure of fish populations appears multi-causal and cannot be disaggregated, such that a single environmental characteristic can be shown to drive patterns of population success.
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Taylor, Ryan James. "Applications of fish scale analysis to understand growth dynamics of fish populations". Thesis, University of Hull, 2012. http://hydra.hull.ac.uk/resources/hull:5771.

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The use of hard structures to derive ecological information about fish populations is a fundamental tool in fisheries assessment, specifically the back-calculation of fish lengths. This study highlights the potential errors associated with correction factors (c) because of poor sampling and provides a validation of (c) values. In addition, classical fisheries assumptions about the relationship between scale radius and fish body length were tested. As a result, variability or error of correction factors can be reduced by having a minimum of 30 samples with at least 4 age classes represented. Alternatively the (c) provided can be used as a standard (c) factor for each species, eliminating the variance caused by poor sampling. Finally, the development of standard intercept values (based on observation of juvenile fish) should be promoted to replace or validate mathematically derived (c). The ability to accurately determine the age and growth of fish is an important tool in fishery biology and therefore it is fundamental to this work that all steps should be taken to increase the accuracy of back-calculated length-at-age data and account for size when fish lay down scales. To account for potential error associated with a correction factor, larval fish were routinely sampled to identify patterns of squamation, providing preliminary reference data for correction factors used in back-calculation of fish length-at-age. Determination of the length at squamation for more specimens will allow for the derivation of standard correction factors for each species that can be used across the species’ distribution. Geometric morphometric (GM) analysis of fish scales has been shown to be a good discriminator of genera using a fixed landmark approach. However, freshwater fish scales are often irregular in shape; therefore it is not possible to identify identical locations on all individuals. This study provides evidence that scale morphology can be used to discriminate riverine fish species. The analysis of fish scale morphology is inexpensive, quick, non-destructive, and informative and could easily be added to existing monitoring programmes. This study highlights the potentially important and opportunistic information that can be gained from the GM analysis of fish scales. It is therefore anticipated that this study will be fundamental in shaping future fish population assessments. It is recognised amongst scientists that fish growth rates vary across a catchment, with species typically achieving greater growth rates in their ‘preferred’ habitats. Similarly, previous authors have identified that growth variation exists for different species and populations. This study has found that the geographic location of a river/region influences the growth rates of freshwater fishes commonly found in England. The method of constructing regional growth curves and subsequent statistical analysis discussed in this study should be adopted by fisheries scientists, because current national growth rates may be unachievable in specific regions. Furthermore, current national curves are inappropriate for growth and population analysis because they may be biased by an individual river and/or region. This study is one of the few studies to examine the differences between regional recruitment success, and found similarities and differences at both the regional and national level. With recruitment success a key requirement of monitoring fish populations under the WFD, it is hoped the information provided here will aid fisheries scientists to understand the factors affecting regional and national recruitment success. Studies on the impact of climate change on fish populations have typically focused on suggesting, rather than predicting, the effects on lentic species rather than lotic species. Furthermore, these studies often deal with American rather than European ecosystems. To address this, predicted changes in the climate of the UK were used to model likely influences on fish populations, expressed as the length of young of year (YOY) fish achieved by the end of the first growth period (May-September), juvenile and adult growth (annual growth increment, AGI) and recruitment success (year class strength, YCS), for three cyprinid fish. This study found that climate change is likely to increase the propensity for cyprinid fish to thrive, although the exact mechanism will depend on inter-annual variability in temperature rises and the timing of flow events. Notwithstanding the limitations of this study, it provides ecologists with a greater understanding of climate change and its potential impact on European, lotic fish populations.
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Sapp, Shawn A. "Population trends of major near-shore fish species in Indiana waters of Lake Michigan". Virtual Press, 1999. http://liblink.bsu.edu/uhtbin/catkey/1125023.

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The purpose of this research was to determine population trends of major nearshore fish species in Indiana waters of Lake Michigan from 1984 to 1998 to gain insight into species dynamics. Index trawl samples were collected twice monthly from June through August at three locations. Trends of catch-per-unit-effort (CPUE) were investigated for the most abundant species: yellow perch (Perca flavescens), alewife (Alosa pseudoharengus), spottail shiner (Notropis hudsonius), rainbow smelt (Osmerus mord iz), and bloater (Coregonus hoyi). Trawl catch of yellow perch, alewife, and spottail shiners at sites M, K, and G were strongly correlated suggesting similar fluctuations. Young-of-the-year trawl catch revealed that insight to population dynamics of species was not always reliable. Trawl CPUE of > age 1 fish provided insight to dynamics of the major species at all sample locations with strong trend similarities between sites. No strong major species interactions were found using simple linear correlations.
Department of Biology
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Lebepe, Jeffrey. "Assessment of the effects of environmental contaminants on feral fish populations in the Olifants river system". Thesis, University of Limpopo, 2018. http://hdl.handle.net/10386/2450.

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Thesis (Ph.D (Zoology)) --University of Limpopo, 2018
Freshwater ecosystems are the most threatened systems globally, suffering from channel modification, over extraction of water and, of particular concern, pollution. In South Africa, Olifants River is categorised as the third most polluted river system. Acid mine drainage seeping from derelict and abandoned mines has been described as the primary stressor in the upper Olifants catchment. The increase of metal concentration in the water, sediment and fish tissues has been evident over the past few decades. As a result, there has been an increasing concern regarding the effects of increased metal concentrations on the health of fish and the safety of communities consuming fish from the polluted Olifants River system. This study used enzymatic and histopathologic biomarkers to assess the physiological response of Oreochromis mossambicus and Labeo rosae to environmental contaminants. The study further investigated the metal accumulation trend of across different fish tissues and assessed the edibility of O. mossambicus and L. rosae from Loskop and Flag Boshielo dams. Water, sediment and fish samplings were carried out concurrently during low flow and high flow seasons in 2014. Water and sediment sampling were done at the inflow, middle and dam wall. A minimum of 10 fish specimens for each species were collected from Loskop and Flag Boshielo dams during each sampling. For bioaccumulation analysis, liver, gill and muscle tissues were dissected out, wrapped with aluminium foil and frozen. Frozen samples were sent to SANAS accredited laboratory for metal analysis. For Histopathology, tissues were fixed in 10% neutral buffered formalin prior processing. Tissue processing was done at the Pathology laboratory of the University of Pretoria, Onderstepoort campus. For biomarker analysis, liver and brain tissues were fixed in liquid nitrogen in the field and transferred to the -80°C biofreezer at the University of Limpopo, Biotechnology Unit laboratory. Metal concentrations in the muscle tissue were used to calculate hazard quotient for human health risk assessment which was based on the assumptions that an adult weighting 70 kg consume 150 g portion once per week. Alkaline pH was observed in the water throughout the study. Most water constituents were within the guidelines at both dams. The water at Flag Boshielo Dam was oligotrophic with Loskop Dam showing mesotrophic conditions. Concentrations were below detection level for most metals; however, significant concentrations were recorded in the bottom sediment. Although Loskop Dam is being described as a repository for pollutants from the upper Olifants catchment, no significant differences (p>0.05) were observed for metal concentrations in sediment between the two dams. Coinciding with sediment metal concentrations, liver, gills and muscle have shown notable concentrations for both species at Loskop and Flag Boshielo dams. The common trend of liver accumulating higher metal concentration followed by gill and muscle (liver>gills>muscle) was observed for most metals on O. mossambicus and L. rosae at both dams. In contrast, lead, strontium and manganese showed higher concentrations in the gills. Muscle exhibited lowest concentrations for most metals. Remarkable trends on the activities of biomarkers, lactate dehydrogenase (LDH), glucose-6-phosphate dehydrogenase (G6PDH), glutathione-S-transferase (GST) and acetylcholinesterase (AChE) were detected for both species at Loskop and Flag Boshielo dams. Labeo rosae population have shown a significantly high (p<0.05) LDH activities at Loskop Dam and no significant difference (p>0.05) was observed for Oreochromis mossambicus. Glucose-6-phosphate dehydrogenase activities exhibited no significant difference (p>0.05) for both species between the two dams. Labeo rosae have shown a significantly high (p<0.05) GST activities at Loskop Dam whereas Oreochromis mossambicus exhibited no significant difference (p>0.05) between the two dams. Acetylcholinesterase (AChE) has shown no significant difference (p>0.05) for both species between the Loskop and Flag Boshielo dams. LDH, G6PDH and GST activities have shown relationship with metal concentrations, which makes them good biomarkers of metal exposure.The condition factor indicated that overall conditions of O. mossambicus and L. rosae from Loskop and Flag Boshielo dams were good. Hepatosomatic index results were not conclusive. Most histopathological alterations were recorded on both species at both dams, but with different magnitude of severity. Regressive changes were more prominent in the liver and gills of both species at Loskop and Flag Boshielo dams followed by progressive change. Gills of Oreochromis mossambicus exhibited moderate modifications (score >20) at Loskop Dam and slight modification (score <20) at Flag Boshielo Dam. Labeo rosae populations have shown slight modifications (score <20) in the gills at both dams. Both species have shown significant difference (p<0.05) on the gill index between the two dams. Liver index has also exhibited significant difference (p<0.05) for each species between Loskop and Flag Boshielo dams. Slight modifications (score <20) were observed in the liver for both species at Loskop and Flag Boshielo dams. Both species have shown to accumulate metals within their tissues with liver accumulating higher concentration for most metals, followed by gills and muscle, respectively. Although muscle showed to accumulate lesser metal concentrations, it still raise a serious concern as it is the tissue consumed by human. Lead, chromium, cobalt and antimony concentrations have been the only metals of concern in this river system over the past few years; nevertheless, the present study has shown that other metals viz. arsenic, silver and selenium have exceeded international levels for safe consumption. Given the metal concentration trend reported over the past two decade in fish tissues, there is a need for urgent intervention to address the acid mine drainage problem to ensure sustainable development of the Olifants River and safety of communities depending on it for their livelihood.
NRFand RAD
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Franckowiak, Ryan Patrick. "Temporal dynamics of genetic variation within the Escanaba Lake walleye population : implications for managing the genetic resources of naturally recruiting walleye populations /". Link to Full-text, 2005. http://epapers.uwsp.edu/thesis/2006/Franckowiak.pdf.

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Dux, Andrew Martin. "Distribution and population characteristics of lake trout in Lake McDonald, Glacier National Park implications for suppression /". Thesis, Connect to this title online, 2005. http://etd.lib.montana.edu/etd/2005/dux/DuxA1205.pdf.

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Thesis (M.S.)--Montana State University--Bozeman, 2005.
Title from PDF t.p. (viewed on Mar. 30, 2008). Chairperson, Graduate Committee: Christopher S. Guy. Includes bibliographical references (p. 67-76).
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White, William T. "Aspects of the biology of elasmobranchs in a subtropical embayment in Western Australia and of chondrichthyan fisheries in Indonesia /". Access via Murdoch University Digital Theses Project, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040510.154948.

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Markovsky, W. Coult. "The role of the Cape Fear River discharge plume in fisheries production : aggregation and trophic enhancement /". Electronic version (Microsoft Word), 2004. http://dl.uncw.edu/etd/2004/markovskyw/wcoultmarkovsky.doc.

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Mohamed, A. R. M. "A study of fish populations in Abberton Reservoir". Thesis, University of Essex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374718.

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Książki na temat "Fish populations"

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Criddle, Keith R. Modeling dynamic fish populations. Seattle, WA: Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 1991.

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Weaver, Thomas M. Fisheries habitat and fish populations. Kalispell, Mont. (723 5th Ave. E., Kalispell 59901): Flathead Basin Commission, 1991.

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MacCall, Alec D. Dynamic geography of marine fish populations. Seattle: Washington Sea Grant Program, 1990.

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Symposium on Climatic Change and Northern Fish (1992 Victoria, B.C.). Climate change and northern fish populations. Ottawa: National Research Council of Canada, 1994.

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Weatherley, A. H. The biology of fish growth. London: Academic Press, 1987.

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Tennessee Valley Authority. River Basin Operations. i Tennessee Valley Authority. Water Resources., red. Hydroacoustic estimates of fish abundance. Chattanooga, Tenn: Tennessee Valley Authority, Resource Group, River Basin Operations, Water Resources, 1992.

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Tennessee Valley Authority. River Basin Operations i Tennessee Valley Authority. Water Resources, red. Hydroacoustic estimates of fish abundance. Chattanooga, Tenn: Tennessee Valley Authority, Resource Group, River Basin Operations, Water Resources, 1991.

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Paragamian, Vaughn L. Fish populations of Iowa rivers and streams. [Des Moines, Iowa]: Iowa Dept. of Natural Resources, 1990.

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Hurkett, Brad. Abundance and distribution of migratory bull trout in the Upper Oldman River Drainage, 2007-2010. [Lethbridge, Alta.]: Alberta Conservation Association, 2011.

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Skaugstad, Calvin. Comparative catch per unit of effort of resident and stocked species of fish test netted in Harding Lake, 1992. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1993.

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Części książek na temat "Fish populations"

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Hilborn, Ray, i Carl J. Walters. "Observing fish populations". W Quantitative Fisheries Stock Assessment, 159–94. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3598-0_5.

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Roux, A. L., i G. H. Copp. "Fish populations in rivers". W The Fluvial Hydrosystems, 167–83. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1491-9_8.

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Fogarty, Michael J., i Loretta O'Brien. "Recruitment in Marine Fish Populations". W Fish Reproductive Biology, 9–49. Oxford, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781118752739.ch1.

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Rose, Kenneth A., Jeffrey A. Tyler, Dennis SinghDermot i Edward S. Rutherford. "Multispecies modeling of fish populations". W Computers in Fisheries Research, 194–222. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8598-9_8.

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Persson, L. "Asymmetries in Competitive and Predatory Interactions in Fish Populations". W Size-Structured Populations, 203–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-74001-5_14.

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Reynolds, Joel Howard, i William David Templin. "Detecting specific populations in mixtures". W Genetics of Subpolar Fish and Invertebrates, 233–43. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-0983-6_19.

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Cowx, Ian G., Jonathan P. Harvey, Richard A. Noble i Andrew D. Nunn. "Monitoring Fish Populations in River SACs". W Biological Monitoring in Freshwater Habitats, 53–62. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9278-7_6.

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Wohlfarth, Giora W. "Genetic Management of Natural Fish Populations". W Genetic Conservation of Salmonid Fishes, 227–30. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2866-1_19.

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Whitfield, Alan K., Bronwyn M. Gillanders i Kenneth W. Able. "Climate Change Effects on Fish Populations". W Climate Change and Estuaries, 475–506. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003126096-26.

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Villwock, W. "On Micropopulations in Fish and Their Effects on Differentiation and Speciation". W Minimum Animal Populations, 51–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78214-5_5.

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Streszczenia konferencji na temat "Fish populations"

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Papanicolaou, A., i M. Elhakeem. "Creating Wet Acres in the Missouri River for Fish Populations". W World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)186.

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Elhakeem, M., i A. N. Papanicolaou. "Creating Wet Acres in the Missouri River for Fish Populations". W World Environmental and Water Resources Congress 2007. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40927(243)352.

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Crepis, Oleg, Dumitru Bulat, Elena Zubcov, Marin Usatii, Denis Bulat, Nicolae Saptefrati i Aureliu Cebanu. "Dezvoltarea unui complex mobil pentru reproducerea ecologo- industrial a speciilor pelagofile de pești în condiții de fluvii și lacuri". W Simpozion "Modificări funcționale ale ecosistemelor acvatice în contextul impactului antropic și al schimbărilor climatice". Institute of Zoology, Republic of Moldova, 2021. http://dx.doi.org/10.53937/9789975151979.13.

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The populations of most fish species in the Republic of Moldova reproduce naturally, however, as a result of the increasing anthropogenic impact on aquatic ecosystems, the conditions for their natural reproduction have deteriorated significantly. In this context, one of the research objectives for 2020 was the development of efficient technological principles for conservation and rational use of local fish stock. It was revealed the ensuring of the development of the most vulnerable stages in the ontogenesis of fish in controlled environmental conditions is one of the basic principles of productivity management of Danube mackerel populations. In order to put into practice the principles of managing the productivity of breeding stocks, a mobile installation has been developed for the reproduction of pelagophilous fish species.
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Garlov, P. E., N. B. Rybalova, T. A. Nechaeva, S. U. Temirova, V. S. Turitsin i S. F. Marasaev. "Biotechnical management system for artificial reproduction of fish populations based on a complex of innovative developments: Fish reproduction management". W MODERN APPROACHES IN ENGINEERING AND NATURAL SCIENCES: MAENS-2021. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0144965.

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Boavida, Isabel, José Maria Santos, Maria João Costa, Renan Leite, Anthony Merianne, Maria Manuela Portela, Francisco Godinho i in. "EcoPeak4Fish: A Multidisciplinary Project Targeting the Protection of Fish Populations Affected by Hydropeaking". W SIBIC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/blsf2022013085.

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Branco, Paulo, Pedro Segurado, José Maria Santos, Susana D. Amaral, Gonçalo Duarte, Filipe Romão, Tamara Leite, António Pinheiro i Maria T. Ferreira. "River Network Connectivity—An Holistic Approach to Improve the Sustainability of Fish Populations". W SIBIC 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/blsf2022013105.

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Maina, John, Geraldine Kavembe, Michael Papah, Atli Mashiteng, Christopher Wood, Adalto Bianchini, Lucas Bianchini i in. "Sex ratios and condition factors of the fragmented populations of the Lake Magadi cichlid fish, Alcolapia grahami: A fish living on edge". W Annual International Conference on Advances in Veterinary Science Research (VETSCI 2016). Global Science & Technology Forum (GSTF), 2016. http://dx.doi.org/10.5176/2382-5685_vetsci16.9.

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Caruso, C., J. Idjadi, K. Lagueux i J. Mandelman. "Impacts of offshore liquid natural gas (LNG) terminals on local fish populations in Mass Bay". W 2010 OCEANS MTS/IEEE SEATTLE. IEEE, 2010. http://dx.doi.org/10.1109/oceans.2010.5664530.

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Dogadova, O. V., Yu A. Mitrofanov i V. A. Kochetova. "The variability in the features in some wild and fish hatchery populations of Pacific salmon". W Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492). IEEE, 2003. http://dx.doi.org/10.1109/oceans.2003.178080.

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Boavida, Isabel, José Maria Santos, Maria João Costa, Renan Leite, Maria Manuela Portela, Francisco Godinho, Pedro Leitão, Rui Mota, Jeffrey Tuhtan i António Pinheiro. "The EcoPeak4Fish project: an integrated approach to support self-sustaining fish populations downstream hydropower plants". W Proceedings of the 39th IAHR World Congress From Snow to Sea. Spain: International Association for Hydro-Environment Engineering and Research (IAHR), 2022. http://dx.doi.org/10.3850/iahr-39wc2521711920221160.

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Raporty organizacyjne na temat "Fish populations"

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Dolloff, C. Andrew, David G. Hankin i Gordon H. Reeves. Basinwide Estimation of Habitat and Fish Populations in Streams. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1993. http://dx.doi.org/10.2737/se-gtr-083.

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Dolloff, C. Andrew, David G. Hankin i Gordon H. Reeves. Basinwide Estimation of Habitat and Fish Populations in Streams. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1993. http://dx.doi.org/10.2737/se-gtr-83.

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Zentner, D., D. Shoup i Shannon K. Brewer. Effects of sucker gigging on fish populations in Oklahoma scenic rivers. U.S. Fish and Wildlife Service, sierpień 2023. http://dx.doi.org/10.3996/css88211970.

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Benoit-Bird, Kelly J. A Novel Technique to Detect Epipelagic Fish Populations and Map their Habitat. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2009. http://dx.doi.org/10.21236/ada531620.

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Benoit-Bird, Kelly J. A Novel Technique to Detect Epipelagic Fish Populations and Map Their Habitat. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2007. http://dx.doi.org/10.21236/ada541456.

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Bryant, M. D. Past and present aquatic habitats and fish populations of the Yazoo-Mississippi Delta. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 2010. http://dx.doi.org/10.2737/srs-gtr-130.

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Bryant, M. D. Past and present aquatic habitats and fish populations of the Yazoo-Mississippi Delta. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station, 2010. http://dx.doi.org/10.2737/srs-gtr-130.

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Axenrot, Thomas, i Erik Degerman. Ontogenetic variation in lacustrine European smelt (Osmerus eperlanus) populations as a response to ecosystem characteristics : an indicator of population sensitivity to environmental and climate stressors. Department of Aquatic Resources, Swedish University of Agricultural Sciences, 2024. http://dx.doi.org/10.54612/a.5qdiolcgj2.

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Smelts play a key role in the pelagic ecosystem of large lakes in northern Europe and North America. In numbers, they often dominate the open water. In large lakes in Scandinavia (including Finland), European smelt (Osmerus eperlanus L.), a cold-water glacial relict, is commonly the most important prey for piscivorous fish species, but also acts by ontogenetic shifts as a predator on zoo-plankton, small crustaceans, fish larvae, mysids and occasionally – with increasing size - fish. Furthermore, the large numbers of smelt in the open water are important competitors to other planktivorous fish. Due to the diverse life histories and biological interactions of smelt in large lakes, its role in the food-web structure is expected to be variable. Smelt population dynamics, recruitment, size and age structure, growth, life history and mortality were analysed and compared for five Swedish lakes that varied in size, depth, morphology, trophic status and latitude to understand the varying life histories and roles in lake food-webs. The results showed that in shallow, eutrophic lakes smelt stayed small and short-lived, and populations experienced high mortality. In deeper, colder and less nutrient-rich lakes, smelts grew larger and older, and might shift to a piscivorous trophic level. By ontogenetic adaptions smelt seems to uphold high abundance and recruitment over a wide range of ecosystems, but in shallow lakes without cold water refuges smelt populations run the risk of collapsing on the occasion of extremely warm summers with drastic consequences for their predators and lake ecosystems.
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Axenrot, Thomas, Erik Degerman i Anders Asp. Seasonal variation in thermal habitat volume for cold-water fish populations : implications for hydroacoustic survey design and stock assessment. Department of Aquatic Resources, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.5i05rb1iu1.

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For accurate stock assessment, survey design must consider fish behavior and ecology. Yearlings and older individuals of the commercially exploited cold-water species vendace (Coregonus albula) are found below the metalimnion through periods of thermal stratification. These stratification periods generally last for 3-4 months, from the middle of summer to early autumn. In lakes with heterogeneous distribution of depths, the habitat volume for vendace vary drastically within and across years, which affects the distribution and population densities. Variable thermal habitat volumes, with food and oxygen depletion in the hypolimnion through the period of stratification, may act as a population size-regulating factor. Using hydroacoustics in combination with trawl data and temperature profiles, we examined the distribution of vendace through annual periods of thermal stratification. We found that yearling and older vendace these periods were confined to cold-water habitat volumes representing less than 10 % of the total water volume of Lake Mälaren, the third largest lake in Sweden. By introducing stratification to the design of hydroacoustic surveys supported by midwater trawling, seasonal aggregations of fish in temporally restricted thermal habitat volumes can be used to lower survey effort and improve the precision in estimates of population size. Temporally restricted habitat volumes may induce risks for the populations to over-fishing and sensitivity to environmental changes that potentially may call for directed management.
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Zydlewski, Gayle B., i Sean Casey. Evaluation of Fish Movements, Migration Patterns and Populations Abundance with Streamwidth PIT Tag Interrogation Systems, Final Report 2002. Office of Scientific and Technical Information (OSTI), luty 2003. http://dx.doi.org/10.2172/828278.

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