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 20 of 82 for “"fish assemblages"”.
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Effects of habitat characteristics on cryptic fish assemblages
… structure is known to influence the abundance of fishes on temperate reefs. Biotic interactions play a major role in determining the distribution and abundance of species. The significance of these forces in affecting the abundance of fishes may hinge on the presence of organisms that either …
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Effects of Avian Predators on Stream Fish Assemblages
… chapter focuses on foraging behavior of kingfishers and great blue herons, and shows that netting and perches can be used to successfully manipulate avian predation pressure. The third chapter uses this technique to examine what effects kingfishers and wading birds are having on stream fish …
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Larval Fish Assemblages of Three Eastern South Dakota Rivers
… in eastern South Dakota, highly unpredictable. Fishes in these streams have adopted reproductive strategies that allow for rapid recolonization after frequent and sometimes intense floods and droughts. New stresses, such as the recent introduction of the invasive Bighead Carp Hypophthalmichthys …
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A Change in Fish Assemblages in the Pascagoula River, MS
… United States and have seen a change in fish assemblages over time. Examination of long-term fish assemblage data show that the mainstem Pascagoula River and its two major tributaries (mainstem Leaf and Chickasawhay Rivers) have been dominated by five abundant taxa that comprise 83% of …
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Response of barrier island fish assemblages to impacts from multiple hurricanes: assessing resilience of Chandeleur Island fish assemblages to hurricanes Ivan (2004) and Katrina (2005)
… can temporarily disrupt seasonal patterns of fish assemblage change or result in permanent changes in fish assemblages. I studied the effects of two hurricanes on fish assemblages at the Chandeleur Islands and the possible influence that storm-generated tidal channels may have on the …
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GIS habitat associations of large river fish assemblages from side-scan sonar
Access to abstract permanently restricted to Ball State community only.
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Effects of Barren Reservoir on Upstream Fish Assemblages of Barren River Tributaries
… a lentic system, dams as barriers to migratory fishes, and the influence of introduced species often stocked into reservoirs. It has not been until relatively recently that the upstream effects have been studied. The central theme here is that while the dam proper creates a barrier it is …
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Multiscale Anthropogenic Impacts on Stream Condition and Fish Assemblages in Amazonian Landscapes.
… much, if not the majority, of the freshwater fish fauna of the Amazon basin, which itself is one of the most diverse in the world. Despite the biological significance of these stream networks, the consequences of land use change for the condition of instream habitat and fish fauna remain very …
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Short and Long-term Changes in the Fish Assemblages of Bayou Lacombe, Louisiana
… around Bayou Lacombe have altered its fish assemblage. In 2005, the impact of Hurricane Katrina on southeast Louisiana presented me with a unique opportunity to explore the effects of a catastrophic storm on the Bayou. I explored the effects of natural and human disturbances on the …
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The Effects of Bridge Crossings on Fish Assemblages in a Southwest Missouri Stream
… in this region is being assessed by sampling fishes in selected streams (Bull and Swan Creek) with the goal of developing an Index of Biotic Integrity (IBI). From 1 June 2002 until 30 September 2002 I sampled fish located in the vicinity of bridge crossings in Swan Creek to determine if fish …
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Larval fish assemblages of selected estuarine and coastal systems in Kwazulu-Natal, South Africa
This study focuses describing assemblages of fish larvae occurring in potential nursery habitats and elucidating the recruitment processes of fishes in the KwaZulu-Natal region. The composition, the degree of estuarine-association of all taxa, temporal and spatial abundance patterns, developmental …
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Local effects of culverts on habitat features and fish assemblages in Blue Ridge streams
I studied environmental conditions, fish assemblages, and culvert features in 11 headwater streams (Tennessee and Conasauga river drainages) in Cherokee National Forest (Blue Ridge ecoregion), Tennessee, May-August 2008. Culvert-related effects on instream habitat and fish assemblages were measured …
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Effects of Wave Action on the Structure of Fish Assemblages Across an Exposure Gradient
… abundance, and functional ecology of estuarine fishes. If increased wave exposure is acting as a disturbance to these habitats, ecological theory (Intermediate Disturbance Hypothesis) predicts that diversity will peak at intermediate frequencies and intensities of disturbance. Fish were sampled …
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The Role of Physiography in the Relationships Between Land Cover and Stream Fish Assemblages
… related to stream habitat and stream biotic assemblages. Since the physiographic template differs among watersheds and is an important determinant of the processes being studied, it is important to account for these natural differences among watersheds so that the relationship between land …
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Long-term impacts of water quality and climate variability on Illinois River waterway fish assemblages
… These alterations have strongly affected fish assemblages within the river. In 1957, the Illinois Natural History Survey began the Long-Term Fish Population Monitoring Program to sample fish assemblages throughout the Illinois River Waterway (IRW) on a yearly basis. During the 1960s, …
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The effects of coal mining on sedimentation and fish assemblages in the Powell River, Virginia
… sedimentation (particle size < 2 mm), and fish assemblages and to derive ecological indicators for monitoring. The hydrologic (disturbance) regime of the sixth order reach was Classified. Although surface coal mining appears to have reduced flow variance, the changes were not sufficient to …
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Effects of urbanization on instream habitat and fish assemblages in the chattanooga metropolitan area, Tennessee-Georgia
… on instream environmental parameters and fish assemblages. I also investigated changes in urbanization and stream conditions at 10 sites over a 10-year period (1998-2008). Electrofishing yielded 12,329 fish, composed of 38 species from eight families. Urbanization in the study watersheds …
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Effect of riparian land use on the biotic integrity of fish assemblages in Black Creek, Chattanooga, Tennessee
… the stream's ecological health. I assessed fish assemblages (biotic integrity), water quality, instream habitat, and riparian land-use features at eight sites in Black Creek, May-June 2000. Water quality conditions (temperature, dissolved oxygen, pH, conductivity) were favorable for stream …
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Patterns of Taxonomic, Functional, and Phylogenetic Diversity, and Ecological Drivers of Stream Fish Assemblages in East Texas
… 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 ecological processes shaping biodiversity patterns and species distributions. In 2023-2024, 60 …
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Historical baselines and a century of change in the demersal fish assemblages on South Africa's Agulhas Bank
… interpretation of recent variability observed in fish populations, species compositions, distribution ranges or ecological indicators, depends on knowledge of their past dynamics and historical states. The onset of systematic fisheries data collection typically lagged decades or even centuries …
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