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 8 of 8 for “"Bycatch species"”.
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Assessment of bycatch species in the Namibia Hake directed bottom trawl fishery (1997-2014)
… management, is how to manage and mitigate bycatch caught during commercial fishing. The Namibian hake-directed bottom trawl fishery has been an important component of the Namibian fishing industry for decades. Due to the low selectivity of the bottom trawling method, bycatch has been a …
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Bycatch in the South African midwater trawl fishery for horse mackerel (Trachurus capensis) as established from observer records
… catch is taken by a single midwater trawler. The bycatch of this fishery is investigated by analysing observer records from 2004 to 2014 to report on bycatch composition, volumes and temporal and spatial patterns. Small fauna were analysed by extrapolation of sample weights and large fauna were …
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Contextualising the bycatch 'problem' in the Olifants Estuary Small-Scale Gillnet Fishery using an Ecosystem Approach to Fisheries
… with complex conservation concerns such as bycatch. Greater considerations for broader-scale and holistic approaches, as proposed by the 'Ecosystem Approach to Fisheries' (EAF) and the 'balanced harvesting approach', are beginning to challenge some of the negative misconceptions around …
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Understanding and mitigating seabird bycatch in the South African pelagic longline fishery
… and at sea by fishing fleets, as fisheries bycatch, as well as other human impacts. Seabird bycatch has negatively affected many seabird populations worldwide, with trawl, gillnet and longline fisheries considered the most destructive to seabird populations. Seabird bycatch from trawl and …
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Age, Growth, Mortality, and the Effects of Trawling on Mortality of the Longspine Porgy, <i>Stenotomus caprinus</i>
… (Longspine Porgy) is one of the most abundant bycatch species caught in trawl fisheries in the northern Gulf of Mexico (GOM). Biological data of length, weight, and abundance have been collected since 1972 on the Southeast Area Monitoring and Assessment Program (SEAMAP) surveys with a variety …
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Patterns in the landed catches and determinants of catch composition in the South African inshore trawl fishery
… (east coast sole), has the second highest bycatch rate of all South African fisheries. For over one hundred years there has been concern about the sustainability of the harvests in this fishery. To enable effective management of the many species harvested, I aim to describe patterns in the …
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Sea sparing, sea sharing, and production at least cost to the planet
… fishery using empirically informed estimates of species’ sensitivities to fishing. I find that a strategy with no-take MPAs is best for biodiversity when avoiding the local extinction of sensitive species is a priority, but that a strategy without no-take MPAs is best for the abundance of more …
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Aspects of the sustainability of creel fishing for Norway lobster, Nephrops norvegicus (L.), on the west coast of Scotland
… Nephrops, particularly if other crustacean species were inside the creel. Larger Nephrops appeared to have a greater threshold for disturbances such as and the presence of conspecifics or other species as well as reduced gear avoidance, suggesting that Nephrops creels select larger animals …