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 6 of 6 for “"selective mortality"”.
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Yellow perch in Lake Michigan: investigating size-selective mortality and alternative estimators of age
… First, I examined size variability and size-selective mortality during the juvenile life stage of yellow perch in southwestern Lake Michigan. Second, I assessed the utility of sagittal otolith weight as a rapid and objective predictor of yellow perch age using random forest analysis. My …
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Bringing Childhood Health into Focus: Incorporating Survivors into Standard Methods of Investigation
… living population from which they were drawn. Selective mortality and hidden heterogeneity in frailty are particularly relevant when assessing childhood health in the past, as subadults are the most vulnerable group in a population and are therefore less likely to fully represent the health of …
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The Effects of Minimum Size Limit Regulations On Exploited Fish Populations off the Atlantic Coast of the Southeastern United States
… bycatch of co-occurring species, release mortality for undersize fish, and differential size-selective mortality that removes faster growing fish. Effects of size limits were investigated utilizing catches from a commercial fisherman and an individual-based model. The entire catch of a …
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Hatchdate distributions and growth rates of anchovy (Engraulis encrasicolus) in the Southern Benguela ecosystem
… distributions using age-length-keys. Mortality rates, hatch date distributions and growth rates were estimated. Instantaneous mortality rates calculated from the catch curves were 0.0353 day-1 for larvae caught in March 2000 and 0.0202 day-1 for juveniles caught in May 2000. These …
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Habitat requirements of the black bear in Dare County, North Carolina
… The population imbalance probably resulted from selective mortality engendered by excessive dog hunting. Very little evidence of reproductive attainment was noted. Reduced bear sign was recorded during winter months. Telemetry results also suggested a period of winter dormancy for Dare bears.
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Habitat use and diet preference of extralimital giraffes in the Kgalagadi Transfrontier Park
… intervention, A. haematoxylon could suffer selective mortality through the impacts of giraffe browsing, resulting in a loss of species and structural diversity of the landscape.