The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus)
Reducing shark bycatch and depredation (i.e., damage caused by sharks to gear, bait, and desired fish species) in pelagic longline fisheries targeting tunas and swordfish is a priority. Electropositive metals (i.e., a mixture of the lanthanide elements lanthanum, cerium, neodymium, and praseodymium)...
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1556 2024-06-23T07:57:32+00:00 The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) Brill, Richard Bushnell, Peter Smith, Leonie Speaks, Coley Sundaram, Rumya Wang, John 2009-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/555 https://scholarworks.wm.edu/context/vimsarticles/article/1556/viewcontent/brill.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/555 https://scholarworks.wm.edu/context/vimsarticles/article/1556/viewcontent/brill.pdf VIMS Articles Rare-Earth-Metal Longline Fishery Pacific Halibut Spiny Dogfish Electroreception Atlantic Collapse Bycatch Growth Ocean Fisheries Science Peer-Reviewed Articles Aquaculture and Fisheries text 2009 ftwilliammarycol 2024-06-05T03:31:54Z Reducing shark bycatch and depredation (i.e., damage caused by sharks to gear, bait, and desired fish species) in pelagic longline fisheries targeting tunas and swordfish is a priority. Electropositive metals (i.e., a mixture of the lanthanide elements lanthanum, cerium, neodymium, and praseodymium) have been shown to deter spiny dogfish (Squalus acanthias, primarily a coastal species) from attacking bait, presumably because of interactions with the electroreceptive system of this shark. We undertook to determine the possible effectiveness of electropositive metals for reducing the interactions of pelagic sharks with longline gear, using sandbar sharks (Carcharhinus plumbeus, family Carcharhinidae) as a model species. The presence of electropositive metal deterred feeding in groups of juvenile sandbar sharks and altered the swimming patterns of individuals in the absence of food motivation (these individuals generally avoided approaching electropositive metal closer than similar to 100 cm). The former effect was relatively short-lived however; primarily (we assume) because competition with other individuals increased feeding motivation. In field trials with bottom longline gear, electropositive metal placed within similar to 10 cm of the hooks reduced the catch of sandbar sharks by approximately two thirds, compared to the catch on hooks in the proximity of plastic pieces of similar dimensions. Electropositive metals therefore appear to have the potential to reduce shark interactions in pelagic longline fisheries, although the optimal mass, shape, composition, and distance to baited hooks remain to be determined. Text spiny dogfish Squalus acanthias W&M ScholarWorks Pacific |
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W&M ScholarWorks |
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ftwilliammarycol |
language |
unknown |
topic |
Rare-Earth-Metal Longline Fishery Pacific Halibut Spiny Dogfish Electroreception Atlantic Collapse Bycatch Growth Ocean Fisheries Science Peer-Reviewed Articles Aquaculture and Fisheries |
spellingShingle |
Rare-Earth-Metal Longline Fishery Pacific Halibut Spiny Dogfish Electroreception Atlantic Collapse Bycatch Growth Ocean Fisheries Science Peer-Reviewed Articles Aquaculture and Fisheries Brill, Richard Bushnell, Peter Smith, Leonie Speaks, Coley Sundaram, Rumya Wang, John The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
topic_facet |
Rare-Earth-Metal Longline Fishery Pacific Halibut Spiny Dogfish Electroreception Atlantic Collapse Bycatch Growth Ocean Fisheries Science Peer-Reviewed Articles Aquaculture and Fisheries |
description |
Reducing shark bycatch and depredation (i.e., damage caused by sharks to gear, bait, and desired fish species) in pelagic longline fisheries targeting tunas and swordfish is a priority. Electropositive metals (i.e., a mixture of the lanthanide elements lanthanum, cerium, neodymium, and praseodymium) have been shown to deter spiny dogfish (Squalus acanthias, primarily a coastal species) from attacking bait, presumably because of interactions with the electroreceptive system of this shark. We undertook to determine the possible effectiveness of electropositive metals for reducing the interactions of pelagic sharks with longline gear, using sandbar sharks (Carcharhinus plumbeus, family Carcharhinidae) as a model species. The presence of electropositive metal deterred feeding in groups of juvenile sandbar sharks and altered the swimming patterns of individuals in the absence of food motivation (these individuals generally avoided approaching electropositive metal closer than similar to 100 cm). The former effect was relatively short-lived however; primarily (we assume) because competition with other individuals increased feeding motivation. In field trials with bottom longline gear, electropositive metal placed within similar to 10 cm of the hooks reduced the catch of sandbar sharks by approximately two thirds, compared to the catch on hooks in the proximity of plastic pieces of similar dimensions. Electropositive metals therefore appear to have the potential to reduce shark interactions in pelagic longline fisheries, although the optimal mass, shape, composition, and distance to baited hooks remain to be determined. |
format |
Text |
author |
Brill, Richard Bushnell, Peter Smith, Leonie Speaks, Coley Sundaram, Rumya Wang, John |
author_facet |
Brill, Richard Bushnell, Peter Smith, Leonie Speaks, Coley Sundaram, Rumya Wang, John |
author_sort |
Brill, Richard |
title |
The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
title_short |
The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
title_full |
The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
title_fullStr |
The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
title_full_unstemmed |
The Repulsive And Feeding-Deterrent Effects Of Electropositive Metals On Juvenile Sandbar Sharks (Carcharhinus Plumbeus) |
title_sort |
repulsive and feeding-deterrent effects of electropositive metals on juvenile sandbar sharks (carcharhinus plumbeus) |
publisher |
W&M ScholarWorks |
publishDate |
2009 |
url |
https://scholarworks.wm.edu/vimsarticles/555 https://scholarworks.wm.edu/context/vimsarticles/article/1556/viewcontent/brill.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
spiny dogfish Squalus acanthias |
genre_facet |
spiny dogfish Squalus acanthias |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/555 https://scholarworks.wm.edu/context/vimsarticles/article/1556/viewcontent/brill.pdf |
_version_ |
1802651222113517568 |