Analysis of sex-specific spawning biomass per recruit of the sailfish (Istiophorus platypterus) in the waters off eastern Taiwan
Average rating
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Star rating
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Author
Chiang, Wei-ChuanSun, Chi-Lu
Wang, Sheng-Ping
Yeh, Su-Zan
Chen, Yong
Su, Wei-Cheng
Liu, Don-Chung
Chen, Wen-Yie
Date
2009
Metadata
Show full item recordAbstract
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 were0.26/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 forfemales) which are commonly used as target reference points in fisheries management. The effects of the fishingmortality, natural mortality, and age at first capture on the estimates of biological reference points wereevaluated by using the Monte Carlo simulation. The results indicate that failure to consider the uncertainty inparameters such as natural mortality or age at first capture may lead to the improper estimation of biologicalreference points. This study indicates the possibility of current fishing mortality exceeding the target biologicalreference 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 beclosely monitoreJournal
Fishery BulletinVolume
107Issue/Article Nr
3Page Range
265-277Resource/Dataset Location
http://fishbull.noaa.gov/13/chiang.pdfCollections