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 8 of 8 for “"egg survival"”.
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Exotic Armored Catfishes in Texas: Reproductive Biology, and Effects of Foraging on Egg Survival of Native Fishes (Etheostoma fonticola, Endangered and Dionda diaboli, Threatened)
… affect native species through dietary overlap, egg predation, and other factors. This study focused on two related topics: 1. the reproductive biology of Hypostomus in the San Marcos River, Texas; and 2. the potential effect of the foraging activities of the exotic on the egg survival of two …
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Predicting water quality effects on bay anchovy (Anchoa mitchilli) growth and production in Chesapeake Bay: linking water quality and individual-based fish models
… of changes in nutrient loadings on anchovy survival and growth. An individual-based predation model was statically linked to Patuxent River watershed land-use and water quality models, and used to simulate the effects of changes in watershed land-use, Chesapeake Bay boundary condition …
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Field and laboratory studies suggest that recruitment of the invasive common carp is controlled by native fish in Stable Lakes of the Upper Mississippi Basin.
… We tested this hypothesis by comparing the survival of carp eggs and larvae in the presence and absence of native predatory fishes in three experiments. First, we sampled fish diets and carp egg abundance on a daily basis in lakes where wild carp had spawned to identify fish predators and …
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Aspects of the ecology of Scolypopa australis (Walker) (Homoptera:Ricaniidae) and its parasite Centrodora scolypopae (Valentine) (Hymenoptera: Aphelinidae)
… vine hopper, Scolypopa australis Walker, and its egg parasite, Centrodora scolypopae Valentine, were studied in a bracken and blackberry filled gully near Hamilton, New Zealand, from 1980-85. The S. austral is egg population was estimated using a height frequency vegetation sampling method and the …
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Piping plover population dynamics and effects of beach management practices on piping plovers at West Hampton Dunes and Westhampton Beach, New York
… and estimated reproductive and nest and chick survival rates. We monitored plover management efforts and determined causes of nest loss when possible. We monitored piping plover behaviors and obtained an index to plover food supply. We estimated area of plover habitats and defined areas …
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Thermal impacts on the early life history of Sauger (Sander canadensis)
… advanced to explain the observed variable egg survival was that river temperatures leading up to and during the spawn were outside of optimal ranges. Our research explored how temperature affects multiple stages in reproduction including adults, embryos, and prolarvae. Specifically, we …
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Interannual Variation in Larval Yellow Perch Abundance in Eastern South Dakota Glacial Lakes and Relation to Sympatric Walleye Populations
… that would induce mortality of yellow perch eggs, 2) investigate the relation between climatological variables and larval perch abundance in six eastern South Dakota glacial lakes, and 3) relate long-term larval perch abundance to walleye growth and condition in six eastern South Dakota …
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Vector-borne Disease Risk Assessment in Times of Climate Change: The Ecology of Vectors and Pathogens
… occur. Here, the low-temperature threshold for egg survival was experimentally tested for post-diapause and non-diapause European eggs of Aedes albopictus and non-diapausing eggs of Aedes aegypti. Hatching success after the cold treatment was significantly increased in European eggs which have …