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Age and growth determination and stock identification using statolith microstructure of Indian squid, Loligo duvauceli

Bergen Open Research Archive

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dc.contributor.author Srichanngam, Sansanee
dc.date.accessioned 2010-08-18T08:05:40Z
dc.date.available 2010-08-18T08:05:40Z
dc.date.issued 2010-05-29
dc.date.submitted 2010-05-29 en
dc.identifier.uri http://hdl.handle.net/1956/4025
dc.description.abstract Age and growth and stock identification of Indian squid, Loligo duvauceli were examined by statolith microstructure and morphological measurements. The Indian squid were sampled from the Gulf of Thailand and the Andaman Sea by otter board trawlers. The age in days after hatching for the Indian squid from the Gulf of Thailand ranged from 61 to 153 days and the Andaman Sea ranged from 76 to 270 days. The Growth Index (GI) was not significantly different between sexes for both seas. The GI of males and females were 0.959 and 1.044 mm/day for the Gulf of Thailand and 0.730 and 0.706 mm/day for the Andaman Sea. A logarithmic function was selected to describe the population growth pattern for both seas. Sexual dimorphism appeared in both two populations. The maturity pattern was more distinctly separated by DML than age for both sexes. The DML50% for males and females was 78.90 and 94.05 mm for the Gulf of Thailand and 100.69 and 91.52 mm for the Andaman Sea. These lengths are smaller than previous studies, and may show evidence of fisheries induced evolution to earlier maturation at smaller sizes. Both morphological and statolith variables were apparent for L. duvauceli stocks identification using Discriminant Analysis. en
dc.format.extent 2769269 bytes en
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher The University of Bergen en
dc.rights Copyright the author. All rights reserved en
dc.subject Loligo duvauceli en
dc.subject Statolith en
dc.subject Age en
dc.subject Growth en
dc.subject Stock identification en
dc.subject Maturity en
dc.title Age and growth determination and stock identification using statolith microstructure of Indian squid, Loligo duvauceli en
dc.type Master thesis
dc.type.degree Master i Fiskeribiologi og forvaltning en
dc.type.course FIFO en
dc.rightsHolder The author en
dc.subject.archivecode Mastergrad
dc.subject.nus 759906
dc.type.program MAMN-FIFO


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