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Showing 1 to 18 of 18 for “"Fish Diversity"”.
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Exploring Fish Diversity as a Determinant of Ecosystem Properties in Aquatic Food Webs
… the effect of common carp across a gradient of fish richness in mesocosms. The invader reduced native fish production and the effect was reduced with increasing fish richness. The invertebrate community was modified by a top-down effect from the richness treatment, whereas the invader had a …
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Association of Lead and Zinc on Fish Diversity in the Spring River Basin, Missouri
… of this thesis project was to determine if fish diversity and community integrity were associated with zinc and lead contamination in the Spring River Basin, southwest Missouri. Sampling sites were located in the Tri-State mining district where zinc and lead were once heavily mined, and from …
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The impacts of voluntary private lands programs on stream fish diversity in the Kaskaskia River Basin, Illinois
Freshwaters support over 40% of fish species diversity, as well as one-third of all vertebrate species, yet remain one of the most threatened habitats globally. Anthropogenic disturbances have caused many negative impacts throughout history, and continue to do so today. After the dust bowl we began …
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Influences of watershed urban development on habitat heterogeneity and native fish diversity in a ridge and valley stream in Southeastern Tennessee
… with instream environmental conditions and fish assemblage attributes in a third-order Ridge and Valley stream in the Chattanooga, Tennessee area. Stream water quality, habitat, and fish assemblages were sampled in May-June 2005 at seven sites (drainage areas <17 km2) in the Mountain Creek …
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Empirical evaluation of the effectiveness of South Africa's marine protected area network in representing fish communities
In this study, fish community structure as sampled by shore angling, trawling, boat-based line-fishing and seine netting was compared across the EEZ of South Africa, including sites in designated MPAs. Multivariate statistics were used to assess the extent to which MPAs represent the full range of …
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Remotely operated vehicle exploring ichthyofauna association with habitat from shore-shelf, in an endemism hotspot in South Africa
… because it was no longer an area of commercial fishing importance. A remotely operated vehicle (ROV) explored the regions’ fish and benthic habitats and investigated their associations. This study’s results provide quantitative information on fish and habitat diversity in the intermediate depths …
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Quantitative fish survey of the submarine canyons of the iSimangaliso Wetland Park
There have been no quantitative studies of fish species associated with the submarine canyons of the north east coast of South Africa. These canyons offer protection to coelacanths Latimeria chalumnae, fish of commercial importance, and a number of protected and endemic species. A fish survey was …
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Patterns of Taxonomic, Functional, and Phylogenetic Diversity, and Ecological Drivers of Stream Fish Assemblages in East Texas
… in East Texas contain a rich freshwater biodiversity, with the Neches and Sabine River basins supporting some of the greatest freshwater fish diversity in the state. Given the heterogeneity of habitats and species diversity, these rivers serve as excellent natural systems for examining the …
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Characterizing spatial and temporal trends in fish community diversity in the inland lakes of Isle Royale, MI, USA
… impact, providing an opportunity to explore how fish diversity has natural shifted with minimal confounding effects. I analyzed fish assemblages of 23 lakes sampled in the 1920s, 1990s, and 2020s to 1) assess temporal shifts in species richness and composition 2) identify lakes and species …
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Taxonomic Revision of the Pirate Perches (Percopsiformes: Aphredoderidae) Reveals Three New Species and Elevates Two Subspecies
… United States is home to exceptionally high fish diversity among temperate latitudes. Species richness and endemism in this region is commonly attributed to historic biogeographic processes dating back to the Pliocene or earlier, and influences of sea levels through a relatively old though …
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Investigating the larval/juvenile notothenioid fish species assemblage in Mcmurdo Sound, Antarctica using phylogenetic reconstruction
… 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 notothenioid fishes collected …
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Integrating morphological data from fossil and living species and the early evolution of ray-finned fishes (Actinopterygii)
… the tools to name and organize the colossal diversity of living things on Earth. We estimate that there are between 3 and 100 million species on Earth, approximately 1.2 million of which have been named. However, living species comprise perhaps 1 percent or less of all the species that have …
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Habitat utilisation by juvenile fishes in Mhlathuze Estuary and Richards Bay Habour
… Africa are important nursery areas for many fish species, but this role has been threatened by habitat degradation due to anthropogenic impacts, especially in KwaZulu-Natal systems. This has emphasised the importance of harbours in the province for juvenile estuarine fishes, but as areas of …
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Patterns in Fish Community Structure in a Regulated River
… the abundance, composition, and distribution of fish communities in the lower Roanoke River, a hydropeaking system in North Carolina. Fishes were sampled at before and after peaking events over three years; 2007 to 2009. I evaluated trends in species richness, diversity, and assemblage …
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The Influence of Livestock Watering Ponds (Dugouts) on Native Stream Fishes, Especially the Endangered Topeka Shiner (Notropis topeka)
… mosaic of aquatic habitats important to stream fishes. Livestock watering holes (i.e., dugouts) are constructed in floodplains, yet the influence of these manmade wetlands on native stream fishes is unknown. Such information is important for the management of native stream fishes, such as the …
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Comparisons of Fish Species Inside and Outside of Marine Protected Areas off the South Central Coast of California
<p>COMPARISONS OF FISH SPECIES INSIDE AND OUTSIDE OF MARINE PROTECTED AREAS OFF THE SOUTH CENTRAL COAST OF CALIFORNIA</p> <p>David E. Rasmussen</p> <p>From 2004-2008 and 2008-2009 Cal Poly University researchers conducted two separate tag and recapture studies of nearshore fish populations along …
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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 …