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 7 of 7 for “"indices of abundance"”.
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Analyses of Indices of Abundance for Important Groundfish Species in the Northern Gulf of Mexico from 1987-2009, Relative to Shrimp Bycatch; with Age and Growth of Three Sciaenid Species
<p>Bycatch in the shrimp fishery became of particular concern in the 1980s during the peak of shrimp harvest in the northern Gulf of Mexico. Shrimp bycatch is of major importance because the majority of catch in the fishery is not intended target species of commercial shrimp, and most of the …
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Stock assessment of the Chokka Squid : Loligo vulgaris reynaudii
The primary aim of the study was to assess the status and productivity of chokka squid. Main hypotheses examined are the following: that the sharp decline in the trawl fishery catch per unit effort (CPUE) data in the early 1980s, reflects a real decline in the trawlers catch rate; that the decline …
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Distribution, Abundance, and Trophic Ecology of Anguilliform Leptocephali in the Northern Gulf of Mexico
<p>All species of anguilliform eels have pelagic leptocephalus larval stages, which provides a means of monitoring the population dynamics of these otherwise cryptic and hard to study species. The goals of this study were to: 1) describe the distribution and abundance of anguilliform eel …
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Evaluating population estimates of mountain goats based on citizen science
… made from data collected by volunteers to professionally collected data. In Glacier National Park (GNP), Montana, I assessed whether citizen science is a useful method to monitor mountain goat (Oreamnos americanus) populations. I compared estimates of mountain goat abundance by volunteers at …
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Evaluating population estimates of mountain goats based on citizen science
… made from data collected by volunteers to professionally collected data. In Glacier National Park (GNP), Montana, I assessed whether citizen science is a useful method to monitor mountain goat (Oreamnos americanus) populations. I compared estimates of mountain goat abundance by volunteers at …
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The impact of bias in length frequency data on an age structured fisheries stock assessment model
… allowing them to incorporate a larger variety of fisheries data. These typically include information regarding annual fishery yields, indices of abundance and catch composition data, which reflect the distribution of ages in the harvested population each year. In some fisheries, age composition …
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The implementation of a management procedure approach to set catch limits for the Southern Bluefin Tuna and the Atlantic Bluefin Tuna
The aim of this thesis is to develop, test and evaluate candidate management procedures (CMPs) for the implementation of the Management Procedure (MP) approach to set catch limits for two bluefin tuna species: Southern bluefin tuna (SBT - Thunnus maccoyii ) and Atlantic bluefin tuna (ABFT - Thunnus …