Analysis of sex-specific spawning biomass per recruit of the sailfish (Istiophorus platypterus) in the waters off eastern Taiwan

Chiang, Wei-Chuan and Sun, Chi-Lu and Wang, Sheng-Ping and Yeh, Su-Zan and Chen, Yong and Su, Wei-Cheng and Liu, Don-Chung and Chen, Wen-Yie (2009) Analysis of sex-specific spawning biomass per recruit of the sailfish (Istiophorus platypterus) in the waters off eastern Taiwan. Fishery Bulletin, 107(3), pp. 265-277.

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Abstract

Analyses of sex-specific yield per recruit and spawning stock biomass per recruit were conducted to evaluate the current status of the sailfish (Istiophorus platypterus) fishery in the waters off eastern Taiwan. Natural mortality rates estimated from Pauly’s empirical equation were 0.26/yr for females and 0.27/yr for males. The current fishing mortality rates were estimated as 0.24/yr and 0.43/yr for females and males, respectively, which are much lower than the estimated F0 .1 (0.62/yr and 0.79/yr for females and males, respectively) and FSSB40 (0.46/yr for females) which are commonly used as target reference points in fisheries management. The effects of the fishing mortality, natural mortality, and age at first capture on the estimates of biological reference points were evaluated by using the Monte Carlo simulation. The results indicate that failure to consider the uncertainty in parameters such as natural mortality or age at first capture may lead to the improper estimation of biological reference points. This study indicates the possibility of current fishing mortality exceeding the target biological reference points may be negligible for sailfish in the waters off eastern Taiwan. However, in view of the recent rapid increase in fishing effort, it is evident that the stock status and development of the fishery need to be closely monitore

Item Type: Article
Title: Analysis of sex-specific spawning biomass per recruit of the sailfish (Istiophorus platypterus) in the waters off eastern Taiwan
Personal Creator/Author:
CreatorsEmail
Chiang, Wei-Chuan
Sun, Chi-Lu
Wang, Sheng-Ping
Yeh, Su-Zan
Chen, Yong
Su, Wei-Cheng
Liu, Don-Chung
Chen, Wen-Yie
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 107
Number: 3
Page Range: pp. 265-277
Date: 2009
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8783
Depositing User: Patti M. Marraro
Date Deposited: 10 Jun 2012 08:59
Last Modified: 10 Jun 2012 08:59
URI: http://aquaticcommons.org/id/eprint/8783

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