Literaturdatenbank
Literaturdatenbank |
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Stoot, L. J. (2013). Sub-lethal consequences of net entrapment on freshwater turtles encountered as bycatch in commercial fisheries. Unpublished thesis , Carleton University, Ottawa, Ontario.
Added by: Admin (06 Jan 2014 18:25:24 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: anon2013.15698 View all bibliographic details  |
Categories: General Keywords: Chelydra serpentina, Chelydridae, Chrysemys picta, Emydidae, Graptemys geographica, Habitat - habitat, Kinosternidae, Nordamerika - North America, Schildkröten - turtles + tortoises, Sternotherus odoratus, Stress - stress, Technik - equipment Creators: Stoot Publisher: Carleton University (Ottawa, Ontario) |
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| Abstract |
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Freshwater bycatch is poorly documented despite the potential impact to aquatic biodiversity in a time of many other threats. As such, it is increasingly important to quantify individual consequences associated with bycatch, especially in long-lived species, where increases in adult mortality are especially likely to cause population declines. Here, I investigated the sub-lethal effects of fisheries interactions on freshwater turtles in a small-scale commercial fyke-net fishery in eastern Ontario. I experimentally exposed three frequently captured freshwater turtle species to entrapment stressors and revealed that there was evidence of physiological disturbances and behavioural impairments. Subsequently, I used fine-scale accelerometry to assess the effects of entrapment on locomotory behaviour and revealed that simulated entrapment resulted in locomotory impairment in two species over 6 hours after release. Collectively, this work will provide better insight into the sub-lethal effects associated with freshwater turtle bycatch in entrapment gear. Of these at-risk species, three are most likely to interact with commercial fishing gear: the eastern musk turtle (Sternotherus odoratus) designated as threatened, and the northern map turtle (Graptemys geographica) and common snapping turtle (Chelydra serpentina) both recognized as special concern. Painted turtles (Chrysemys picta) are also likely to interact with commercial fishing gear.
Added by: Admin |