National Taiwan Ocean University Institutional Repository:Item 987654321/25257
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 27273/39116
Visitors : 2440932      Online Users : 42
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25257

Title: Estimate of reproductive value of the big eye Priacanthus macracanthus in the north-eastern waters off Taiwan
Authors: Kwang-Ming LIU;Kuo-Yau HUNG;Shoou-Jeng JOUNG
Contributors: NTOU:Institute of Marine Affairs and Resource Managemen
國立臺灣海洋大學:海洋事務與資源管理研究所
Keywords: demographic analysis;fecundity;north-eastern Taiwan;Priacanthus macracanthus;reproductive value
Date: 2002-06
Issue Date: 2011-10-20T08:21:53Z
Publisher: Fisheries Science
Abstract: abstract:The reproductive value and population status of the big eye in the north-eastern Taiwan waters was estimated by demographic analysis using available life-history parameters. Life-history tables were constructed using estimates of natural mortality (M) of 10.4920/year for age 0 and 0.3256/year for ages 1–9, with a maximum age of 9. Age-specific batch fecundity (Fe) was from Fe = 1391.34e0.1782FL. The age-specific proportion of maturity was estimated from the relationship between the proportion of female maturity (Pr) and fork length (FL): Pr = 1/(1 + e15.081−0.796FL). Females mature at age 3 and mature females reproduce every year. The population increase rate (λ) was estimated to be 20.5% per year and the generation time (G) was 6.25 years without exploitation. The net reproductive value (R0), generation time and intrinsic rate of natural increase (r) decreased with increased fishing mortality. For fixed fishing mortality, when F = 1.2/year and fishing started at age 3, R0 was estimated to be 1.0 and the population was considered to be in equilibrium. For age-specific fishing mortality, when fishing started at age 3, R0 was estimated to be 0.96/year, G being 6.18 years, and the population decreased 0.7% per year. The big eye population had a strong resilience as long as F < = 1.3/year started at an age that was older than the age at maturity (i.e. 3 years old) but would decline when intensive fishing (F > = 1.2/year) started at age 2 or younger. Sensitivity analysis indicated that the mortality of age 0 is the most sensitive parameter in demographic analysis.
Relation: 68(3), pp.523-528
URI: http://ntour.ntou.edu.tw/handle/987654321/25257
Appears in Collections:[Institute of Marine Affairs and Resource Managemen] Periodical Articles

Files in This Item:

File Description SizeFormat
index.html0KbHTML230View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback