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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50117

Title: CPUE STANDARDIZATION OF SAILFISH (ISTIOPHORUS PLATYPTERUS) FOR THE CHINESE TAIPEI DISTANT-WATER LONGLINE FISHERY IN THE ATLANTIC OCEAN
Authors: Nan-Jay Su
Chi-Lu Sun
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: CPUE standardization
abundance index
sailfish
longline
GLM
Date: 2017-08
Issue Date: 2018-09-17T01:53:54Z
Publisher: ICCAT Collective Volume of Scientific Papers
Abstract: Abstract: Catch and effort data of sailfish (Istiophorus platypterus) were collected and analyzed for the
Taiwanese distant-water tuna longline fishery in the Atlantic Ocean. Nominal CPUE based on
catch records in logbooks or that estimated using catch ratio of sailfish over the two species
(sailfish and spearfish Tetrapturus pfluegeri) were standardized using generalized linear models
(GLMs). Two separate eastern and western stocks of sailfish were considered in the analysis,
with information on operation type (i.e. hooks per basket) being included as a potential effect.
Relative abundance indices showed similar and consistent trends for the two assumed scenarios
on catch data. The standardized CPUE of eastern Atlantic sailfish increased from 2009 to a
higher level but then dropped in recent two years (2014-2015), while for the western stock the
CPUE showed a decreasing trend during 2010 and 2014, with a slightly increase in 2015.
Relation: 73(5) pp.1824-1839
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50117
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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