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Showing 1 to 20 of 36 for “"reproductive condition"”.
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Assessment of Indiana bat reproductive condition, recapture trends, and temperatures of artificial roosts in Kentucky
… require population growth. I assessed reproductive capability of the endangered Indiana bat (Myotis sodalis) in Kentucky, where WNS was first detected in hibernacula in April 2011. Due to loss of fat reserves associated with WNS infection, coupled with the energetic expenditures …
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Factors Influencing Ectoparasitism on Western Fence Lizards (Sceloporus occidentalis): Host Sex, Testosterone, Reproductive Condition, and Behavior
… of parasitism include host sex, hormonal state, reproductive condition, and behavior. It has been observed in several vertebrate taxa that males have higher ectoparasite intensities than females and males with increased testosterone have increased ectoparasite intensities. One potential reason …
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The Influence of Reproductive Condition and Roost Type on Thermoregulation and Foraging in Big Brown Bats (Eptesicus Fuscus)
… and foraging patterns vary among reproductive stages in big brown bats (Eptesicus fuscus) that switched between building and tree roosts. I equipped pregnant and lactating bats with temperature sensitive radio-transmitters in southwest Saskatchewan, Canada. While transmitters were …
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Variation in Defensive Behaviors of the Western Cottonmouth (Agkistrodon Piscivorus) as a Result of Temperature, Size, and Reproductive Condition
… influenced by temperature, sex, body size, and reproductive state. In response to human antagonists, the cottonmouth (Agkistrodon piscivorus) exhibits a flight response followed by a range of defensive displays which increase with the level of predatory threat. I utilized field and laboratory …
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Patterns of intersex prevalence, vitellogenin, and reproductive condition in two commercially harvested fish along a pollution gradient in the Illinois River complex
… of male gonadal tissue in fish (i.e. intersex condition), elevated levels of the blood lipoprotein vitellogenin (VTG), and decreased reproduction. However, assessments of the prevalence and distribution of VTG and intersex in wild fish populations are necessary and few have been performed on …
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Lake Sturgeon (Acipenser fulvescens) Population Attributes, Reproductive Structure, and Distribution in Namakan Reservoir, Minnesota and Ontario
… by quantifying age, growth, mortality, and reproductive structure, and 2) to examine the influence of gender and reproductive condition on seasonal distribution and movement patterns of lake sturgeon in the Namakan Reservoir. I evaluated year class strength and reproductive structure of lake …
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Factors Influencing Travel Order as Proxy for Leadership and Trade-offs in Activity Budgets in Lactating and Nonlactating African Savanna Elephants
… needs of female mammals depend upon size or reproductive investment and shape individual activity budgets and behavioral patterns. To maximize nutritional and energetic intake females may increase time allocated to foraging or access resources through risk-prone behaviors, represented as …
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Thermoregulation and behavior of a peripheral population of evening bats (<i>nycticeius humeralis</i>)
… of insects, roost type, number of roost-mates, reproductive condition, and age did not. An analysis of individuals roosting in the same tree on the same day suggested that additional factors might determine exactly how low and for how long bats adjust their body temperatures. I also recorded …
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Reproductive ecology of Vestimentifera (Polychaeta: Siboglinidae) from hydrothermal vents and cold seeps
… contrasting physical and chemical conditions of hydrothermal vents and cold seeps are reflected in the life history patterns of the different species of vestimentiferans. Image analysis of histological sections show that vestimentiferans from hydrothermal vents have significantly …
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Patterns of Chemosensory Behavior in a Closed Population of Wild African Elephants (Loxodonta Africana)
… signals may contain important information about reproductive state, identity, status, or location of conspecifics. Elephants are a long-lived species and males reproduce at a much later age than females, which provides a protracted developmental period for males. This study examined chemosensory …
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Spatial Patterns and Multi-Scale Habitat Selection of the Mudsnake (Farancia Abacura) at the Northern Limits of Its Range
… differed marginally between sexes and with reproductive condition. Males moved greater distances in spring, which is suggestive of mate searching efforts. Non-gravid females moved greater distances mid to late summer suggesting a "capital breeding” style, while the sole gravid female …
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Population Dynamics of Copepoda and Cladocera in an Iowa farm pond, Summer 1973
… keeping records of species numbers, sex, and reproductive condition. Abiotic factors were also measured and recorded. Findings. The greatest concentration of organisms was always located at the 2.5 meter depth. Species' densities did fluctuate directly with primary productivity after a certain …
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The Ontogeny of Spatial Ecology and Habitat Use in a Population of Cottonmouths (Agkistrodon Piscivorus) in Southwest Missouri
… is evidence that ontogeny, along with sex and reproductive condition, may play a large role in spatial distribution within snake populations. I tracked eight juvenile cottonmouths (Agkistrodon piscivorus) during the summer and fall of 2008 to determine how their home ranges, rates and …
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Variation in Behavior of Different Populations and Sex Classes of Paedomorphic Oklahoma Salamanders
… differences in body size, age, sex, and reproductive status can contribute to behavioral variation among conspecifics. Environmental influences include predation pressure, resource availability, and abiotic variables such as temperature. I examined paedomorphic Oklahoma salamanders …
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The Influence of Weather and Geographic Location on Reproduction and Nightly Activity of Bats in Missouri
Understanding the influence of weather on reproductive events is critical for documenting population demographics and developing appropriate conservation and management strategies. Variations in timing of parturition may be due to changes in the ambient weather which affect the available insect …
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Effects of Season, Size and Parasitism by the Acanthocephalan, Profilicollis altmani, on the Carotenoid Concentration and Composition of the Pacific Mole Crab, Emerita analoga
… of parasite infection, body size, season and reproductive condition on tissue carotenoids. We also analyzed <em>P. altmani</em> cystacanths for carotenoids to determine if parasite acquisition of host carotenoids was possible. Infection by <em>P. altmani</em> did not affect the carotenoid …
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Cheating and Selfishness in Reproductive Interactions among Nest Associative Cyprinids
… I utilized gonadosomatic index (GSI) to compare reproductive condition among the bluehead chub Nocomis leptocephalus and its putative nest associates in Catawba Creek, Virginia. GSI of potentially obligate associates tracked host GSI more closely than weak associates, while weak associates …
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Avian determinants of rocky intertidal community structure in South Africa
… of algal production and of the growth, density, reproductive condition and mortality of the dominant intertidal herbivore, Patella granularis.The rate of intertidal algal production was enhanced on shores washed by nutrient-rich waters, and the growth rates and life-history patterns of …
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Assessment Of Natural Roost Availability And Artificial Roost Preference By Indiana Bats In Scott County, Kentucky
… roost types and determine the effects of reproductive condition on roost type and canopy closure selection. I also characterized the forest overstory composition and determined the quantity and quality of Indiana bat roosting habitat across the landscape. My field site was Veterans …
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Reproductive success in Antarctic marine invertebrates
… input has a profound ecological effect. These conditions have developed over several millions of years and have resulted in an animal physiology that is highly stenothermal and sometimes closely coupled with the seasonal food supply, e.g. reproductive periodicity and food storage. Therefore, …
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