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| Chang, S.K.; Liu, H.C.. |
| There were about 341 deep-sea longliners operating in the Indian Ocean (small longliners operating in the northeast Indian Ocean were not included) in 1999, about the same level to 1998. The total catch made by these longliners was roughly estimated as 99,000 MT, a decrease of about 11,000 MT from 1998. The drop of yellowfin tuna by 5,700 MT was the main cause, followed by decreases of bigeye tuna by 2,600 MT and swordfish by 2,100 MT. This decrease in catch might be due to the unfavorable fishing condition around the traditional fishing grounds in the Indian Ocean. In general, the total catch of tunas and billfishes was around 93,000-110,000 MT from 1992 to the present except the relatively high catch in 1993. 'Research Group' Overseas Fisheries... |
| Tipo: Proceedings Paper |
Palavras-chave: Catch statistics Tuna fisheries Longlining Catching method ISW; Indian Ocean. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/72 |
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| Chang, S.K.; Wang, S.B.. |
| Taiwan reorganized the catch statistics compiling group in 1996, with changes proposed in its data processing system. Through joint work between ICCAT experts and Taiwanese scientists, the system was carefully reviewed and verified. During the review, the need for revising the historical catch statistics was noted. The revision of Atlantic data was proposed and accepted by ICCAT in 1997. This paper gives the revision on Indian Ocean longline statistics with brief description on the new system. Major changes in total catches were due to the re-estimation of landings of bigeye and yellowfin tunas for six years based on Japanese import information, recovery of sales records of swordfish and application of conversion factors to processed weight reported... |
| Tipo: Proceedings Paper |
Palavras-chave: Data collections Data processing Catch statistics Longlining Tuna fisheries ISW; Indian Ocean. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/53 |
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