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dc.contributor.authorMamhot, Jinnie R.
dc.contributor.authorVerceles, E. R.
dc.contributor.editorBagarinao, Teodora, U.
dc.date.accessioned2018-02-22T07:18:48Z
dc.date.available2018-02-22T07:18:48Z
dc.date.issued2007
dc.identifier.citationMamhot, J. R., & Verceles, E. R. (2007). Diet and sexual maturity of yellowfin and skipjack tuna taken by hand lines from fish-aggregating 'payaw' off northwestern Luzon. In T. U. Bagarinao (Ed.), Research Output of the Fisheries Sector Program (Vol. 2. Reports on Fisheries and Aquaculture, pp. 25-27). Quezon City, Philippines: Bureau of Agricultural Research, Department of Agriculture.en
dc.identifier.isbn9718511776
dc.identifier.urihttp://hdl.handle.net/10862/3261
dc.description.abstractSkipjack tuna Katsuwonus pelamis and yellowfin or albacore tuna Thunnus albacares taken by hand lines from the 'payaw' off La Union and Ilocos Sur were sampled from April 1994 until August 1995. Skipjack ranged from 28 cm to 59 cm in fork length and from 0.35 to 4.2 kg in weight. Yellowfin ranged 24–67 cm and 0.25–6.4 kg. The common size landed was about 40 cm for both species. Size at first maturity of skipjack was about 41 cm in males and 42 cm in females. The yellowfin tuna taken by hand lines were almost all immature except two mature males about 60 cm long. About 18 prey species were identified in the stomachs of skipjack, and about 25 prey species in yellowfin. The preferred prey were mantis shrimps and squids. Small fishes and other invertebrates were also eaten. Mesopelagic lanternfish were eaten by yellowfin and epipelagic jellyfish were eaten by skipjack.en
dc.language.isoenen
dc.publisherBureau of Agricultural Research, Department of Agricultureen
dc.subjecttunaen
dc.subjectKatsuwonus pelamisen
dc.subjectThunnus albacaresen
dc.subjectPhilippinesen
dc.titleDiet and sexual maturity of yellowfin and skipjack tuna taken by hand lines from fish-aggregating 'payaw' off northwestern Luzonen
dc.typeBook chapteren
dc.citation.spage25en
dc.citation.epage27en
dc.citation.bookTitleResearch Output of the Fisheries Sector Programen
dc.subject.asfatuna fisheriesen
dc.subject.asfahandliningen
dc.subject.asfafish aggregating devicesen
dc.subject.asfasexual maturityen
dc.subject.asfadieten
dc.subject.asfastomach contenten
dc.subject.asfapredationen


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