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 9 of 9 for “"Fish Reproduction"”.
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A Standardized Ultrasonography Classification for Channel Catfish Ovarian Development
… in genetic improvement programs for channel catfish Ictalurus punctatus. A literature review on the use of ultrasonography in fish reproduction generated a comprehensive reference data set intended to benefit existing and potential users. It exposed the need for reporting of instrument control …
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Epigenetic effects of benzo(a)pyrene in Fundulus heteroclitus and Danio rerio
… toxicant exposures. Our goal was to use two fish models, Fundulus heteroclitus and Danio rerio (zebrafish), to study the benzo(a)pyrene (BaP) effects on DNA methylation status and whether the alterations could contribute to BaP-mediated reproductive and developmental toxicities. Initially, we …
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Towards an understanding of seasonal ecophysiology in north-temperate fish
… motivated strategies in northern freshwater fishes remains quite limited, regardless of its potential utility for predicting responses to shifting seasonal environments. In this dissertation, I investigated how fish respond to the highly seasonal energetic demands associated with reproduction …
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Differential stability of spawning microhabitats of warmwater stream fishes
… stability in spawning microhabitats of warmwater fishes in the upper Roanoke River, Virginia. Spawning microhabitats used by four reproductive guilds (egg-clusterers, mound-builders, egg-buriers, and pit-builders) were identified and ranges of 15 microhabitat variables used by each guild were …
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Occurrence and Impact of the Asian Fish Tapeworm Bothriocephalus acheilognathi in the Rio Grande (Rio Bravo del Norte)
… Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic …
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Occurrence and Impact of the Asian Fish Tapeworm Bothriocephalus acheilognathi in the Rio Grande (Rio Bravo del Norte)
… Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic …
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Applying edge-core theory of intraspecific life-history variation to the control of invasive silver carp (hypophthalmichthys molitrix)
… molitrix) are an invasive cyprinid fish that were introduced to North America in the 1970s and have since spread throughout the Mississippi River Basin. During the 2000s, silver carp invaded the Illinois River and began advancing towards the Laurentian Great Lakes, making them a …
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Maturation, spawning and fertility of hybrid striped bass (Morone chrysops x Morone saxatilis) exposed to 6- and 9-month photothermal cycles
This thesis is aimed at improving techniques for induced maturation and artificial fertilization of Morone. Chapter 1 is a study of hybrid bass (n = 73) exposed to 6- or 9-month photothermal cycles which were formed by excising summer or summer and fall photothermal conditions from an annual …