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 758 for “"fishes"”.
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Physiological Diversity of Centrarchid Fishes
… physiological diversity of centrarchid fishes (freshwater sunfish), and examining how this variation shapes their conservation needs. To evaluate inter-specific physiological diversity, an integrated field and laboratory study was used to quantify the energetic costs (intensity and …
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Systematics of the macrourid fishes
The systematics of rattail fishes (Teleostei: Gadiformes, Macrouridae) is reexamined focussing on the $\textit{Coryphaenoides}$ group of genera, including $\textit{Albatrossia, Lionurus, Chalinura and Nematonurus}$. The data matrix consists of 69 osteological characters based on personal …
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The behavioral physiology of labroid fishes
… of this family, and they are one of the few fishes that remain in New England waters throughout the year. In the winter, the cunner enters a state of "torpor" which has previously been described based solely on behavioral observations. The present study showed that cunner undergo …
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Growth Correlates of Several Lotic Fishes
Relationships between growth rates of three fish species and stream morphology, riparian type, and fish community structure were examined in South Dakota wadeable streams during summer 2002 and 2003. Study sites represented all physiographic provinces in South Dakota and a variety of riverine …
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Fishes of the Big Sioux River
An understanding of the fishes and limnology of a river is essential to the effective management of the river. The climate, soils, and agricultural practices in eastern South Dakota create unusual characteristics in rivers draining that area. One of the principal rivers of the area is the Big Sioux …
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The origin of alternative phenotypes in fishes
A basic aim of evolutionary biology is to explain the enormous diversity among animal and plant species. But also within species there is often large genetic and phenotypic variation, and such variation is necessary for evolution to create new reproductively isolated species. The present thesis is …
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The Evolution of Reproductive Complexity in Fishes
… both macro- and microevolutionary lenses. I use fishes, the most diverse group of vertebrates, comprising over 30,000 species, as a model to study the evolution of these traits.</p> <p>In Chapter 1, I introduce the evolution of parental behaviors in fishes. I present a systematic review of …
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Antifreeze Peptides and Glycopeptides in Polar Fishes
… of osmoregulation and reproduction in polar fishes. Polar fishes, like many marine teleosts, have serum osmolalities which are lower than that of sea water. As a result of being hypoosmotic to sea water, marine fishes are faced with a continuous osmotic loss of water. To replace osmotic and …
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Higher interrelationships of recent and fossil gonorynchiform fishes.
… of recent and fossil gonorynchiform fishes.
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Molecular Evolution of Visual System Genes in Fishes
… refractory power. My studies focus on teleost fishes, because teleost visual ecology is exceptionally diverse and because gene duplication is common in this group. In Chapter One, I outline the relevance of protein variation to organismal evolution and describe the analytical methods employed …
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Parasites of fishes from the San Joaquin Delta
… investigations of the San Joaquin area fishes. This study did not deal with a specific group of fish or parasite, but rather all groups of fishes and parasites encountered. As the amount of work done in California has not been extensive, more research will contribute to our understanding …
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Factors Affecting Mercury Accumulation in South Dakota Fishes
Mercury (Hg) contamination in South Dakota fishes has become an important issue. In recent years, several lakes in South Dakota have been found to contain fish with elevated Hg concentrations and fish consumption advisories have been issued for Bitter Lake (Day County), Twin Lake complex (Highway …
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Various aspects of reproductive control in freshwater fishes
Male and female guppies (Poecilia reticulata) were treated with either methyl testosterone, cyproterone acetate (CA) (an antiandrogen) or a combination of the two steroids to determine effects on behavior, coloration, and gametogenesis. The antiandrogen did not fully block the effects of endogenous …
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Genetic Marker-Assisted Management of Virginia Sport Fishes
… Walleye Sander vitreus, are widely sought gamefishes in the Commonwealth of Virginia. Striped Bass along the Atlantic Coast and within the Roanoke River drainage exhibit low genetic variation. Screening 12 microsatellite DNA markers across the range to define population genetic structure, I …
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