Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"juvenile fishes"”.
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Habitat utilisation by juvenile fishes in Mhlathuze Estuary and Richards Bay Habour
… the importance of harbours in the province for juvenile estuarine fishes, but as areas of ongoing development the future ecological value of harbours is not guaranteed. Descriptions of shallow water estuarine habitats and an assessment of their utilisation by juvenile fishes is important if fish …
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Microplastic Abundance, Distribution and Impacts on Sargassum-Associated Juvenile Fishes in the Gulf of Mexico
… an important habitat for larval and juvenile stages of many fish species, is found in large surface aggregations, and may provide complex structure in which microplastics become trapped. This could lead to greater risk of microplastic ingestion by fish early life stages associated …
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The ecology of larval and juvenile fishes in lowland rivers, with particular emphasis on foraging
FEEDING ECOLOGY OF 0+ FISHESThere are numerous biotic and abiotic factors that affect the abundance of cyprinid fish stocks in rivers, many of which are poorly understood. The role of food availability during critical life stages is one of these factors that may determine the growth and survival of …
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Assessing the Nursery-Role Function of Pelagic Sargassum for Juvenile Fishes in the Northern Gulf of Mexico
… for a diverse community of invertebrates and fishes. <em>Sargassum</em> is a presumed nursery habitat for juvenile stages of commercially- and recreationally-targeted fishery species. In this study, I estimated the standardized abundances of juvenile fishes, fish assemblages, and diets of …
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Early Life History of <i>Prognichtys occidentalis</i> and <i>Caranx crysos</i> Associated With <i>Sargassus</i> Habitat in the Northcentral Gulf of Mexico
… and often provide enhanced prey densities for juvenile fishes. The present study examined the influence that this habitat has on the growth, feeding, and condition of larval and young juvenile blue runner Caranx crysos and bluntnose flyingfish Prognichthys occidentalis. Neuston tows were taken …
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Impact of hypercarbia on juvenile fish physiology, behavior, performance, and acclimation potential
Asian carp are non-native invasive fishes that have quickly become the most abundant fishes in many portions of the Midwestern United States. While Asian carp are currently contained within the Mississippi River basin by a pair of electrified barriers, these fish have the potential to negatively …
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Ichthyoplankton Composition in the Loop Current and Sargassum Habitats in the Northern Gulf of Mexico
… brown algae that is habitat for many larval and juvenile obligate and associated fishes. The objectives of this study were to characterize the density and community composition of ichthyoplankton within these habitats using multivariate analysis. I identified three unique assemblages of …
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Influence of stream connectance and network spatial position on fish assemblage structure in the Kansas River basin, USA
… by their connectance to larger mainstem rivers. Fishes in the Kansas River basin varied along a gradient of stream size and longitude, and after controlling for these effects, there was evidence that connectivity to a larger river influenced species richness and assemblage structure. In 1st order …
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Differences in Fish Abundance Among Habitat Types in a Warmwater Stream; The James River, South Dakota
… simple habitats (934 fish/hectare). Patterns in juvenile density were not distinct between complex and simple habitats, and seemed to be more dependent on temporal changes than habitat conditions. Some juvenile fishes appeared to be restricted to certain habitats, possibly due to strict food …
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Investigating the larval/juvenile notothenioid fish species assemblage in Mcmurdo Sound, Antarctica using phylogenetic reconstruction
… species found within the little-known larval and juvenile notothenioid fish assemblage of McMurdo Sound, Antarctica, and to compare this assemblage to the well-studied local adult community. Location: McMurdo Sound, Antarctica. Methods: We extracted genomic DNA from larval and juvenile …
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Yellow perch in Lake Michigan: investigating size-selective mortality and alternative estimators of age
Understanding the recruitment dynamic of fishes is a critical component of fisheries research and management. However, the interplay of both biotic (i.e. spawning stock biomass and predation) and abiotic (i.e. water temperature and currents) factors throughout pre-recruit life stages makes …
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IMPROVING LARVAL SUNSHINE BASS PRODUCTION THROUGH SUPPLEMENTATION OF FEMALE WHITE BASS BROODSTOCK DIETS WITH LONG-CHAIN POLYUNSATURATED FATTY ACIDS
… Nutritional requirements for somatic growth of juvenile fishes differ from nutritional requirements of mature fishes and are largely species-specific. Broodstock nutritional research has focused primarily on lipid and fatty acid requirements and their effects on reproductive conditioning due to …
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Predation Vulnerability and Trophic Interactions of Pallid Sturgeon Scaphirhynchus albus
… too low to sustain the population. Mortality of juvenile fishes is often greatest during their first year of life, and may have large implications for recruitment dynamics of a species. Predation and starvation are the two primary mechanisms of mortality among age-0 fishes, and can play an …
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Biotic Impacts in Shallow Water Bodies of South Dakota Resulting From Common Carp Invasion
… alterations in ecosystem functioning affect fishes at higher trophic levels has been insufficiently studied in natural systems, with the exception of effects on relative abundances of sport fishes. Thus, the objectives of this study were to determine the effects of carp on water quality, …
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Seasonal Use of Missouri River Reservoir Deltas by Fishes
… that these habitats are important to native fishes and support greater fish diversity than other reservoir habitats. As water resources engineers evaluate sediment management techniques, it is important that fisheries biologists understand the use of these habitats by fishes and the potential …
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The responses of subtropical nearshore fishes to climate change
… ecosystems serve as critical habitat for juvenile fishes (e.g., schoolmaster snapper, yellowfin mojarra) and function as foraging grounds for adults (e.g., bonefish, checkered puffer), yet it is unclear how nearshore fishes will respond to forecasted increases in temperature and pCO2. To …