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dc.contributor.authorYeh, S.Y.
dc.contributor.authorHui, C.F.
dc.contributor.authorTreng, T.D.
dc.contributor.authorKuo, C.L.
dc.date.accessioned2004-08-26T14:13:30Z
dc.date.available2004-08-26T14:13:30Z
dc.date.issued1996
dc.identifier.citationIOTC Proceedings, 6th Expert Consultation on Indian Ocean Tunas. p. 258-263
dc.identifier.urihttp://hdl.handle.net/1834/20
dc.descriptionResearch Group: Institute of Oceanography, National Taiwan University Taiwanen
dc.description.abstractBoth morphometric and DNA sequence analyses were applied in this study for throwing light on the stock structure of the albacore (Thunnus alalunga) resource in the Indian Ocean. A total of 144 albacore individuals, sampled from vessels fishing in 6 different localities of the Indian Ocean, were used for morphometric comparison. Two fisheries research surveys were carried out in 1990-1991 by the R/V Haikung, which belongs to the Taiwan Fisheries Research Institute, for collecting albacore specimens. Seven well-preserved muscle tissue specimens, removed from 7 albacores caught from 3 different localities of the Indian Ocean, were used for DNA sequence comparison. The results show that: 1) the first 2 eigen values absorb about 99% of the total within-character variability, it is thus advisable to use the first 2 canonical variables for comparison of morphometric samples; 2) the resultant mutual relationships drawn from morphometric analysis agree surprisingly well with those from the DNA sequence comparison: 3) albacore samples from the Indian Ocean can be categorised into 2 major groups -- those collected from the area west of 90 degree E and those from the area east of that longitude; and, 4) within-group heterogeneity is much less than between-group heterogeneity, no matter which method is applied. Based on the results so far obtained, the authors believe that it is possible to have 2 albacore stocks delimited by the 90 degree E longitude in the Indian Ocean.en
dc.format.extent393749 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherIOTC
dc.subjectTuna fisheriesen
dc.subjectStock assessmenten
dc.subjectStock identificationen
dc.subjectDNAen
dc.subjectThunnus alalungaen
dc.subjectISW, West Indian Oceanen
dc.titleIndian Ocean albacore stock structure studies by morphometric and DNA sequence methodsen
dc.typeProceedings Paper
dc.bibliographicCitation.conferencedate1996
dc.bibliographicCitation.conferencename6th Expert Consultation on Indian Ocean Tunas - IOTCen
dc.bibliographicCitation.conferenceplaceColombo, Sri Lanka
dc.bibliographicCitation.endpage263
dc.bibliographicCitation.stpage258
dc.bibliographicCitation.titleIOTC Proceedings, 6th Expert Consultation on Indian Ocean Tunasen
dc.description.statusPublisheden
refterms.dateFOA2021-01-30T18:47:33Z


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