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| Amir, O.A.; Jiddawi, N.S.; Berggren, P.. |
| Incidental catches (bycatch) in gillnet fisheries off Zanzibar (Unguja Island), as a source of mortality among several species of dolphins, were reported in a questionnaire survey conducted in 1999. As a follow-up to that survey, from January 2000 to August 2003, we monitored the incidental catches of dolphins collected from 12 fish landing sites. Six species of dolphins were recorded from 143 specimens retrieved from bycatches in drift- and bottom set gillnets. Of these, 68 (48%) were Indo-Pacific bottlenose dolphins (Tursiops aduncus), 44 (31%) spinner dolphins (Stenella longirostris), 12 (8%) Risso’s dolphins (Grampus griseus), 11 (8%) Indo-Pacific humpback dolphins (Sousa chinensis), 6 (4%) Pan-tropical spotted dolphins (Stenella attenuata) and 2 (1%)... |
| Tipo: Journal Contribution |
Palavras-chave: By catch; Distribution; Gillnets; Distribution; Http://aims.fao.org/aos/agrovoc/c_35773. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1136 |
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| Amir, O.A.; Berggren, P.; Jiddawi, N.S.. |
| The level of incidental catches of dolphins in artisanal gillnet fisheries was investigated in a questionnaire survey of 101 gillnet vessel operators from 10 villages in Unguja island of Zanzibar, representing half of all the gillnet fishing fleet in 1999. A total of 96 dolphins were reported to have been incidentally caught between 1995 and 1999; 43 Indo-Pacific bottlenose dolphins (Tursiops aduncus), 29 spinner dolphins (Stenella longirostris), 5 lndo-Pacific humpback dolphins (Sousa chinensis) and 19 unidentified dolphins. Most of these incidental catches (46) were reported in 1999. We extrapolate that 93 animals may have been incidentally caught by the entire fishing fleet (201 vessels) during 1999. This estimate represents a serious cause for concern,... |
| Tipo: Journal Contribution |
Palavras-chave: By-catch Gillnet Marine fisheries ISW; Zanzibar; Tanzania. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/37 |
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