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Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks from a Tourist Shark Feeding Site in Fiji
Shark tourism has become increasingly popular, but remains controversial because of major concerns originating from the need of tour operators to use bait or chum to reliably attract sharks. We used direct underwater sampling to document changes in bull shark Carcharhinus leucas relative abundance a...
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2011
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3029404/ https://www.ncbi.nlm.nih.gov/pubmed/21346792 http://dx.doi.org/10.1371/journal.pone.0016597 |
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author | Brunnschweiler, Juerg M. Baensch, Harald |
author_facet | Brunnschweiler, Juerg M. Baensch, Harald |
author_sort | Brunnschweiler, Juerg M. |
collection | PubMed |
description | Shark tourism has become increasingly popular, but remains controversial because of major concerns originating from the need of tour operators to use bait or chum to reliably attract sharks. We used direct underwater sampling to document changes in bull shark Carcharhinus leucas relative abundance at the Shark Reef Marine Reserve, a shark feeding site in Fiji, and the reproductive cycle of the species in Fijian waters. Between 2003 and 2009, the total number of C. leucas counted on each day ranged from 0 to 40. Whereas the number of C. leucas counted at the feeding site increased over the years, shark numbers decreased over the course of a calendar year with fewest animals counted in November. Externally visible reproductive status information indicates that the species' seasonal departure from the feeding site may be related to reproductive activity. |
format | Text |
id | pubmed-3029404 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-30294042011-02-23 Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks from a Tourist Shark Feeding Site in Fiji Brunnschweiler, Juerg M. Baensch, Harald PLoS One Research Article Shark tourism has become increasingly popular, but remains controversial because of major concerns originating from the need of tour operators to use bait or chum to reliably attract sharks. We used direct underwater sampling to document changes in bull shark Carcharhinus leucas relative abundance at the Shark Reef Marine Reserve, a shark feeding site in Fiji, and the reproductive cycle of the species in Fijian waters. Between 2003 and 2009, the total number of C. leucas counted on each day ranged from 0 to 40. Whereas the number of C. leucas counted at the feeding site increased over the years, shark numbers decreased over the course of a calendar year with fewest animals counted in November. Externally visible reproductive status information indicates that the species' seasonal departure from the feeding site may be related to reproductive activity. Public Library of Science 2011-01-27 /pmc/articles/PMC3029404/ /pubmed/21346792 http://dx.doi.org/10.1371/journal.pone.0016597 Text en Brunnschweiler, Baensch. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Brunnschweiler, Juerg M. Baensch, Harald Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks from a Tourist Shark Feeding Site in Fiji |
title | Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks
from a Tourist Shark Feeding Site in Fiji |
title_full | Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks
from a Tourist Shark Feeding Site in Fiji |
title_fullStr | Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks
from a Tourist Shark Feeding Site in Fiji |
title_full_unstemmed | Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks
from a Tourist Shark Feeding Site in Fiji |
title_short | Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks
from a Tourist Shark Feeding Site in Fiji |
title_sort | seasonal and long-term changes in relative abundance of bull sharks
from a tourist shark feeding site in fiji |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3029404/ https://www.ncbi.nlm.nih.gov/pubmed/21346792 http://dx.doi.org/10.1371/journal.pone.0016597 |
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