Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation?
Abstract Evidence of the presence of a group of sei whales ( Balaenoptera borealis ) detected around drifting fish aggregating devices (FADs) was provided by omnidirectional multi‐beam sonar during a survey off the Seychelles (Indian Ocean). The short visit by the sei whales produced a significant c...
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crwiley:10.1111/j.1439-0485.2011.00478.x 2024-06-02T08:03:55+00:00 Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? Brehmer, Patrice Josse, Erwan Nøttestad, Leif 2011 http://dx.doi.org/10.1111/j.1439-0485.2011.00478.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1439-0485.2011.00478.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1439-0485.2011.00478.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Ecology volume 33, issue 2, page 176-182 ISSN 0173-9565 1439-0485 journal-article 2011 crwiley https://doi.org/10.1111/j.1439-0485.2011.00478.x 2024-05-03T10:52:31Z Abstract Evidence of the presence of a group of sei whales ( Balaenoptera borealis ) detected around drifting fish aggregating devices (FADs) was provided by omnidirectional multi‐beam sonar during a survey off the Seychelles (Indian Ocean). The short visit by the sei whales produced a significant change in the behaviour of the fish assemblage associated with the FAD. There was first a significant increase in fish density when the whales approached the FAD, then a marked decrease after the whales had moved away from the FAD. Furthermore, the fish density was still low, 3 h after the whales had left the FAD. We assume that the presence and behaviour of the sei whales led some of the fish initially associated with the FAD to move away from it. There has been a considerable increase in the use of drifting artificial FADs in the Indian Ocean in recent decades. The frequency of cetacean visits to drifting FADs in the Indian Ocean is unknown, but they may have a major impact on assemblages of pelagic fish species around FADs. The effect of marine mammals on FAD‐associated fish could be relevant to the ecological trap theory (FAD acting as a trap for their associated fish) because of their impact on the dynamics of fish aggregation processes, through commensalism and/or predator–prey interactions. Article in Journal/Newspaper Balaenoptera borealis Wiley Online Library Indian Marine Ecology 33 2 176 182 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Evidence of the presence of a group of sei whales ( Balaenoptera borealis ) detected around drifting fish aggregating devices (FADs) was provided by omnidirectional multi‐beam sonar during a survey off the Seychelles (Indian Ocean). The short visit by the sei whales produced a significant change in the behaviour of the fish assemblage associated with the FAD. There was first a significant increase in fish density when the whales approached the FAD, then a marked decrease after the whales had moved away from the FAD. Furthermore, the fish density was still low, 3 h after the whales had left the FAD. We assume that the presence and behaviour of the sei whales led some of the fish initially associated with the FAD to move away from it. There has been a considerable increase in the use of drifting artificial FADs in the Indian Ocean in recent decades. The frequency of cetacean visits to drifting FADs in the Indian Ocean is unknown, but they may have a major impact on assemblages of pelagic fish species around FADs. The effect of marine mammals on FAD‐associated fish could be relevant to the ecological trap theory (FAD acting as a trap for their associated fish) because of their impact on the dynamics of fish aggregation processes, through commensalism and/or predator–prey interactions. |
format |
Article in Journal/Newspaper |
author |
Brehmer, Patrice Josse, Erwan Nøttestad, Leif |
spellingShingle |
Brehmer, Patrice Josse, Erwan Nøttestad, Leif Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
author_facet |
Brehmer, Patrice Josse, Erwan Nøttestad, Leif |
author_sort |
Brehmer, Patrice |
title |
Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
title_short |
Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
title_full |
Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
title_fullStr |
Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
title_full_unstemmed |
Evidence that whales ( Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
title_sort |
evidence that whales ( balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1111/j.1439-0485.2011.00478.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1439-0485.2011.00478.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1439-0485.2011.00478.x |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Balaenoptera borealis |
genre_facet |
Balaenoptera borealis |
op_source |
Marine Ecology volume 33, issue 2, page 176-182 ISSN 0173-9565 1439-0485 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1439-0485.2011.00478.x |
container_title |
Marine Ecology |
container_volume |
33 |
container_issue |
2 |
container_start_page |
176 |
op_container_end_page |
182 |
_version_ |
1800748519563198464 |