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 17 of 17 for “"Harvest rates"”.
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Assessing variability in standardised harvest rates from shore-based recreational fishing surveys
… with more than 50% of recreational catches being harvested from the shore, the development of an index of harvest rates from shore-based recreational fishing would be a valuable addition to stock assessments for some species. However, the large spatio-temporal scope of this fishery poses …
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Reproduction, Survival, and Denning Ecology of Black Bears in Southwestern Virginia
… female mortalities (<u>n</u> = 6). Annual harvest rates for males in 1995 and 1996 were 36.1% and 45.5%, respectively; corresponding harvest rates for females were 0.0%, and 5.9%. Annual survival rates estimated with Kaplan-Meier for adult females, juvenile females, and cubs were 100.0%, …
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Movements, Resource Selection, And Risk Analyses For Parasitic Disease In An Expanding Moose Population In The Northern Great Plains
… tenuis</em> transmission. I estimated moose harvest rates, investigated climate trends, and compared moose population trends to climate for three areas. Finally, I created a risk map for <em>P. tenuis</em> infection that incorporated climate, deer density and habitat.</p> <p>Home ranges (F1 = …
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The value of Mopane worms: quantifying ecosystem services in terms of nutrient cycling in semi-arid regions of Limpopo
… birrea, among others. The caterpillars are harvested for consumption and sale, thus crucial for rural livelihoods. Due to their importance to the livelihood of people and the rise in the human population, coupled with poverty, there is growing concern about harvest rates which might pose a …
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Recreational use, social and economic characteristics of the Smith River and Philpott Reservoir fisheries, Virginia
… counts to estimate angler effort, catch and harvest rates, and total catch and total harvest. On the Smith River, angling pressure per km was most intense in the special management area, with most use occurring on weekend days. Anglers harvested approximately 90% of the rainbow trout they …
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Non-Linear Density Dependence in a Stochastic Wild Turkey Harvest Model
… turkey (<I>Meleagris gallopavo silvestris</I>) harvest models assume density-independent population dynamics despite indications that populations are subject to a form of density dependence. I suggest that both density-dependent and independent factors operate simultaneously on wild turkey …
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Mechanization of the selective harvest of broccoli
… made of concepts for mechanizing the selective harvest of broccoli. Selective harvesting has advantages over once-over harvesting because of greater yield and reduced handling requirements. Results of a preliminary experiment measuring broccoli stalk cutting forces indicated that the blade speed …
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Impact of localized harvest on the population of smallmouth bass (Micropterus dolomieu) of Lake Moomaw, Virginia
… where they are vulnerable to a shore-based, harvest-oriented fishery. The extent of this fishery and resulting effects on the small mouth bass population were analyzed by means of a creel survey in the headwaters area during the spring spawning seasons of 1995 and 1996. Effort, catch, and …
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Evaluation of Bobcat (Lynx rufus) Survival, Harvest, and Population Size in the West-Central Region of South Dakota
… objectives were to: 1) estimate annual survival rates; 2) determine cause-specific mortality; 3) estimate a population size for the western prairie region of South Dakota; 4) estimate home range size of individually marked bobcats; 5) evaluate reproductive status; and 6) build a population model. …
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Survival of Male Merriam's Wild Turkeys in the Northern Black Hills of South Dakota
… led to questions regarding the potential over-harvest of adult male turkeys in the Black Hills. In response to these concerns, the present study was initiated to determine survival rates for Merriam’s turkeys in the northern Black Hills, SD. Adult and juvenile male wild turkeys (n = 137) were …
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Angler satisfaction and management preferences in the southern Lake Michigan fishery
… salmonid anglers having the highest total harvest rates, and yellow perch anglers having the highest harvest of their target species. All anglers were less satisfied with catch-related factors than non-catch related factors. Catch-related factors were also more strongly correlated with …
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Bluegill Seasonal Habitat Selection, Movement, and Relationship to Angler Locations in a South Dakota Glacial Lake
… conditions, 2) examine changes in movement rates and core home range size across a full year, and 3) compare spatial distributions and habitat fished by bluegill anglers to habitat use by bluegills across seasons. Radio telemetry was used to examine seasonal habitat use and movement patterns …
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Fishery, population dynamics and stock assessment of geelbek (Atractoscion aequidens), a commercially important migrant fish species off the coast of South Africa
… current stock-specific fisheries mortality rates and the spawner biomass depletion. These estimates were used as input into the stochastic age-structured simulation model and calibrated using available commercial catch data (1987 - 2011). The stochastic operating model was used to predict …
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Estimating Black Bear Population Size, Growth Rate, and Minimum Viable Population Using Bait Station Surveys and Mark-Recapture Methods
… visitation (black bear visitation) to black bear harvest and mast surveys 1999 = 2002. The mean bait station visitation rate during 1999 - 2002 was 15.3% (SE = 2.89, n = 4). The number of bears harvested in the 3 counties that also had bait station surveys was 48 (31 males, 17 females), 59 (44 …
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Investigation into possible factors affecting the recruitment of Rocky Mountain elk on the Valles Caldera national preserve
… A serological survey was conducted on hunter-harvested elk from the VCNP during the 2010 and 2011 fall hunting seasons. We tested 119 (2010, n =74; 2011, n = 45) for brucellosis, bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis (IBR), bluetongue (BT), epizootic hemorrhagic …
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Seasonal Distributions, Movements, and Habitat use of Adult Yellow Perch in a Simple Basin
… were to 1) compare the distributions, movement rates, and habitat use of adult yellow perch among seasons, lengths groups, and sexes, 2) use telemetry data and associated habitat characteristics to develop a predictive model of yellow perch occurrence, and 3) compare prey density and …
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Temporal, Spatial, and Environmental Influences on the Demographics and Harvest Vulnerability of American Black Bears (Ursus americanus ) in Urban Habitats in New Jersey, Pennsylvania and West Virginia
… black bear space use, habitat selection, and harvest vulnerability. I assessed the harvest vulnerability, home range size, and spatial ecology of black bears in New Jersey, Pennsylvania, and West Virginia in collaboration with the New Jersey Division of Fish and Wildlife, Pennsylvania Game …