Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ?
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 th...
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ftird:oai:ird.fr:fdi:010055858 2023-05-15T15:36:14+02:00 Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ? Brehmer, Patrice Josse, Erwan Nottestad, L. 2012 http://www.documentation.ird.fr/hor/fdi:010055858 EN eng http://www.documentation.ird.fr/hor/fdi:010055858 oai:ird.fr:fdi:010055858 Brehmer Patrice, Josse Erwan, Nottestad L. Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ?. Marine Ecology. An Evolutionary Perspective, 2012, 33 (2), p. 176-182. Ecological trap fish aggregation Indian Ocean omnidirectional sonar predator-prey interaction sei whales tropical fish text 2012 ftird 2020-08-21T06:55:27Z 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 predatorprey interactions. Text Balaenoptera borealis IRD (Institute de recherche pour le développement): Horizon Indian |
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Open Polar |
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IRD (Institute de recherche pour le développement): Horizon |
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ftird |
language |
English |
topic |
Ecological trap fish aggregation Indian Ocean omnidirectional sonar predator-prey interaction sei whales tropical fish |
spellingShingle |
Ecological trap fish aggregation Indian Ocean omnidirectional sonar predator-prey interaction sei whales tropical fish Brehmer, Patrice Josse, Erwan Nottestad, L. Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ? |
topic_facet |
Ecological trap fish aggregation Indian Ocean omnidirectional sonar predator-prey interaction sei whales tropical fish |
description |
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 predatorprey interactions. |
format |
Text |
author |
Brehmer, Patrice Josse, Erwan Nottestad, L. |
author_facet |
Brehmer, Patrice Josse, Erwan Nottestad, L. |
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 ? |
publishDate |
2012 |
url |
http://www.documentation.ird.fr/hor/fdi:010055858 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Balaenoptera borealis |
genre_facet |
Balaenoptera borealis |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010055858 oai:ird.fr:fdi:010055858 Brehmer Patrice, Josse Erwan, Nottestad L. Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices : do their presence affect the processes underlying fish aggregation ?. Marine Ecology. An Evolutionary Perspective, 2012, 33 (2), p. 176-182. |
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