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 366 for “"reproductive success"”.
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Reproductive success in Antarctic marine invertebrates
… coupled with the seasonal food supply, e.g. reproductive periodicity and food storage. Therefore, Antarctic marine animals are likely to be amongst the most vulnerable species worldwide to environmental modifications and can be regarded as highly sensitive barometers for change. Reproductive …
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Effects of black flies on wild turkey reproductive success
Reproductive success is an important driver of population dynamics in wild avian populations. Establishing what factors influence reproductive success is necessary for informing management strategies that ultimately aid in sustaining populations. For game species (i.e., those that are hunted) …
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Individual variation in reproductive success in the wandering Albatross
… for individual-level variation in long-term reproductive success. I examined current breeding characteristics that might explain past reproductive performance amongst experienced breeders.
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Canopy Characteristics Affecting Avian Reproductive Success: The Golden-cheeked Warbler
… Thus, multi-scale studies on bird abundance and reproductive success is necessary for evaluating the effects of habitat alterations. The golden-cheeked warbler (Dendroica chrysoparia) is a Neotropical migrant songbird that breeds exclusively in central Texas. In 1990, the U.S. Fish and Wildlife …
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Regulation of reproductive success in the biennial plant, Hydrophyllum appendiculatum
… and environmental sources of variation in reproductive success in Hydrophyllum appendiculatum (Hydrophyllaceae), a biennial, self-compatible, outcrossing, insect-pollinated, forest understory herb. Observations conducted in two populations over three flowering seasons (1987-1989) revealed …
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CMV Infection Affects Bumblebee Pollination Behaviour and Plant Reproductive Success
… if CMV infection of tomato plants affects plant reproductive success, I carried out a series of bumblebee pollination experiments. Bumblebees pollinate tomato by ‘buzzing’ (sonicating) the flowers, which releases pollen and enhances self-fertilization and seed production as well as pollen export. …
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Piping plover breeding biology and reproductive success on Assateague Island
… tides, and a drawn down waterfowl impoundment. Reproductive rates were lower than two recent estimates of the level necessary to maintain a stable population. The primary problem was poor nest success and the leading cause of nest loss was nest predation by red foxes (Vulpes vulpes) and raccoons …
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Mate choice and reproductive success in the speckled bushcricket, Leptophyes punctatissima
… that body asymmetry has any effect on mating success for either sex. Males on a protein-supplemented diet do not produce larger spermatophores than males whose diet is not supplemented, but they do mate more often, possibly as a result of female choice but more likely because diet affects the …
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Breeding Behavior and Reproductive Success of Chipping Sparrows in Northwestern Minnesota
<p>The reproductive biology of Chipping Sparrows (Spizella passerina) was studied during 2 breeding seasons at the University of Minnesota Forestry and Biology Station, Itasca State Park, Minnesota. Reproductive success was determined primarily by the incidence of nest predation. Parasitism by …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… in Fish: Biological Predictors and Impact on Reproductive Success Thesis Abstract Cognitive abilities underpin almost every animal behaviour and allow them to gather, store, process, and use information essential for survival and reproduction. Great variation in cognitive abilities exists not …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… in Fish: Biological Predictors and Impact on Reproductive Success Thesis Abstract Cognitive abilities underpin almost every animal behaviour and allow them to gather, store, process, and use information essential for survival and reproduction. Great variation in cognitive abilities exists not …
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Reproductive success and survival of the Common Grackle in central Illinois
… 0.09) for published studies. My estimate of nest success was 62.2% (SE = 3.7%), far above the average of 26.7% (N = 6, p = 0.01) for other studies. Post-fledging survival for Common Grackles had not been estimated before, but the estimate of 61.7% (SE = 7.5%) was comparable to post-fledging …
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Habitat influences on avian diversity and reproductive success in western aspen forests
… The presence of conifers may also affect the reproductive success of birds through changes in vegetation density and structural complexity around nest sites or the addition of conifer-dependent nest predators. We examined the effects of conifer encroachment on the diversity and reproductive …
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Habitat influences on avian diversity and reproductive success in western aspen forests
… The presence of conifers may also affect the reproductive success of birds through changes in vegetation density and structural complexity around nest sites or the addition of conifer-dependent nest predators. We examined the effects of conifer encroachment on the diversity and reproductive …
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Understanding the reproductive biology of giant pandas: predictive biomarkers for reproductive success
… there are still many unknowns regarding their reproductive physiology. Giant pandas are monoestrus with a variably timed Spring estrus. Following, there is a variable-length embryonic diapause and a short period of true gestation. Giant pandas undergo pseudopregnancy, and currently there is no …
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Consequences of plant population size for pollinator visitation and plant reproductive success
… the effect of population size on plant reproductive success and insect visitation in 8 populations of two common species in the island of Lesvos, Greece (Mediterranean Sea), Echium plantagineum and Ballota acetabulosa, and of a rare perennial shrub endemic to north-central Italy, Ononis …
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