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 97 for “"prey availability"”.
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The effects of prey availability on the endangered bank cormorant Phalacroxorax neglectus
… level in relation to the spatial distribution of prey surrounding the various colonies, foraging behaviour and breeding success. First, I tested the response of the bank cormorant ’ s population dynamics in relation to the availability of West Coast rock lobster Jasus lalandii in different spatial …
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Shorebird migration in western Kentucky: phenology, habitat use, and possible effects of prey availability
… and also examined possible relationships between prey availability and habitat selection by migrating shorebirds. To mitigate wetland loss, the Kentucky Department of Fish and Wildlife Resources (KDFWR) constructed four moist-soil units on Ballard, Sloughs, and Peabody Wildlife Management Areas …
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Linkages between Marsh Fragmentation, Prey Availability, and Blue Crab (<i>Callinectes sapidus</i>) Abundance and Mortality
… between habitat type, SAV cover, benthic prey availability, and blue crab abundance and mortality due to predation. In different habitat types and across a gradient of marsh fragmentation, crab pots and throw traps were used to conduct monthly crab abundance surveys and benthic cores …
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Linked Changes in Prey Availability and Population Structure: Using Antarctic Fur Seals to Sample Marine Systems
… female Antarctic fur seals, to the abundance and availability of Antarctic krill, where the mean length of krill consumed is used a proxy of krill availability. Over six years, 1568 foraging trips were measured for 178 individual seals, foraging from Bird Island, South Georgia. The relationships …
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BREEDING SEASON AVIAN COMMUNITY COMPOSITION AND PREY AVAILABILITY IN EUCALYPTUS AND SLASH PINE PLANTATIONS OF SOUTHWESTERN LOUISIANA
… richness, and diversity as an indicator of prey availability for breeding birds in eucalyptus plantations. I compared these results to slash pine (<em>Pinus elliottii</em>) plantations of similar age and also of similar height in southwestern Louisiana during bird breeding seasons of 2014 …
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The effect of prey availability on metabolism and activity in the tarantula <i>phormictopus cancerides</i> (araneae: theraphosidae)
… differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture …
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TROPHIC ECOLOGY OF SAILFISH LARVAE IN THE GULF OF MEXICO: AN ANALYSIS OF DIET, PREY AVAILABILITY, PREY QUALITY, AND INFLUENCES ON LARVAL GROWTH
… was compared to environmental, spatial, diet, prey availability, and fatty acid metrics using data collected from near-surface waters in the northern Gulf of Mexico (2017 - 2019). Larvae exhibited a highly selective feeding strategy in early development and expanded their feeding niche to …
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EPIBENTHIC INVERTEBRATES AND JUVENILE CHUM SALMON (ONCORHYNCHUS KETA) PREY AVAILABILITY ALONG AN ECO-ENGINEERED SHORELINE: A CASE STUDY AT THE SEAWALL IN SEATTLE, WASHINGTON
… Elliott Bay waterfront have shown that common prey of migrating juvenile salmon, small epibenthic crustaceans such as amphipods and harpacticoid copepods, are negatively impacted by pier shading, presumably due to the reduced light intensity necessary to support primary production, and that …
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A mathematical model for simulating the bioenergetics and growth of largemouth bass (Micropterus salmoides)
… annual temperature regime and relative levels of prey availability. Interaction among temperature, prey availability, and individual size are examined with the model in terms of their influence on growth. Preliminary tests with the model produced an exponential long term growth pattern which is …
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The ecology of larval and juvenile fishes in lowland rivers, with particular emphasis on foraging
… of which are poorly understood. The role of food availability during critical life stages is one of these factors that may determine the growth and survival of 0+ fishes, and ultimately their recruitment to adulthood. Until the main factors affecting recruitment of cyprinid fishes are better …
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Seasonal Differences in Diet of Two Predatory Fishes in Relation to Reef Type in the Inshore Northern Gulf of Mexico
… ubiquitous distribution may be influenced by prey availability rather than reef profile. Diet composition was analyzed by a PERMANOVA, HMD, MDS, and SIMPER analysis. Between the main terms, only season was significant for both species while the interaction was only significant for Spotted …
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Carnivore ecology and conservation : implications for tiger conservation and management in Nepal /
… developed a novel model to estimate prey abundance, assessed intraguild interaction between tigers and leopards in response to prey and disturbance factors, and evaluated sustainable financing mechanisms for tiger conservation programs. The success of carnivore conservation relies on …
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Patterns in Gray Wolf Pup Survival and Recruitment in Northern Minnesota
… of decline coincided with periods of reduced prey availability and increased energetic demands of dependent wolf pups. This indicates that starvation due to reduced prey availability is likely a primary cause of mortality among wolf pups and the driving force behind intra-annual patterns of …
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Using stable isotopes as a tool to understand the trophic relationships and movement of seabirds off Southern Africa
… gannets apparently feed on more live natural prey whereas males take more fishery discards, although the sex-based difference was confounded by colony effect. Marked inter-colony variation probably results from regional differences in oceanic conditions between, prey availability and among …
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The population status, breeding success and diet of Subantarctic Skuas two decades after the feral cat eradication on Marion Island
Prey availability is often the driver behind predator population trends, diet and breeding success. Changes in predator abundance and breeding success represent numerical responses to changes in prey abundance, whereas dietary shifts can be classified as functional responses. Invasive mammals …
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Habitat Mapping and Predator-Prey Dynamics in Ohio Resevoirs
… explicit information about temperature, prey availability, depth, slope, and substrate to predict saugeye habitat use. Using telemetry we mapped saugeye locations to assess factors that influence saugeye habitat use. Saugeye were tagged with a radio tag for location. Hydroacoustics were …
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Winter flounder Pseudopleuronectes americanus stock enhancement in New Hampshire: Developing optimal release strategies
… determine optimal release size, the predator-prey size relationship between winter flounder and the green crab, Carcinus maenas, was examined. The number of flounder killed per day was significantly higher (31%) in winter flounder <20 mm compared to all other larger fish size classes (4--8% …
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Food Habits of Larval Ringed Salamanders, Ambystoma Annulatum
… diet were probably affected most by changes in prey availability. The larvae fed mostly on plankton and added benthos to their diet as they grew larger. Also, larger larvae ate more prey items than smaller larvae and were able to feed on larger prey items. However, larger prey items were not …
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