Essays about: "seals and fishery"
Found 4 essays containing the words seals and fishery.
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1. Do potentially seal-safe pingers deter harbour porpoises (Phocoena phocoena) in the vicinity of gillnets and thereby reduce bycatch?
University essay from Linköpings universitet/BiologiAbstract : Incidental bycatch in gillnets is a substantial threat to small cetaceans. Using Acoustic Deterrent Devices, “pingers”, have successfully reduced bycatch of harbour porpoises in gillnets. READ MORE
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2. Analysing the seal-fishery conflict in the Baltic Sea and exploring new ways of looking at marine mammal movement data
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : A comprehensive analysis of the available data reveals that there is currently not enough information for making informed management decisions regarding the seal-fishery conflict in the Baltic Sea. Knowledge of hidden and visual damages is limited, which means that the actual cost to the fishing industry from damages is not known. READ MORE
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3. Attack behavior and presence of grey seals around pots : a search for seal-safe cod-pots in the Baltic sea
University essay from SLU/Dept. Of Aquatic ResourcesAbstract : The seals and the fishery are forced to share the role as top-predators in the Baltic waters since they both depend on the same fish stocks, which leads to an unavoidable competition. Seals are raiding traps, leading not only to costly damaged fishing gears and loss in fish catch but also to the seals themselves getting caught and drowned in the gears as by-catch. READ MORE
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4. Explaining catch efficiency of cod pots using in situ behavioural studies
University essay from SLU/Dept. Of Aquatic ResourcesAbstract : The seal populations in the Baltic have been growing since the 1980s causing great eco-nomic losses for the fisheries since seals are using fishing gear as easy food sources. One solution to the seal and fishery conflict is the development of seal safe fishing gear. Pots are a possible solution in the cod (Gadus morhua) fishery. READ MORE