Translator Disclaimer
1 July 2019 Age, Growth and Mortality of the Goldlined Seabream Rhabdosargus sarba in Waters off Southwestern Taiwan
Shoou-Jeng Joung, Yu-Yung Shyh, Kwang-Ming Liu, Shyh-Bin Wang
Author Affiliations +
Abstract

Age, growth and mortality of the goldlined seabream, Rhabdosargus sarba, were estimated based on 593 and 6516 specimens that were collected in waters off southwestern Taiwan from September 2015 to August 2016, and April 2015 to December 2017, respectively. The body weight (BW) and total length (TL) relationship (all data-pooled) was expressed as: BW = 0.01511 TL3.0346 (r2 = 0.95; n = 593). Growth rings (identified as opaque and translucent zones) were counted on 447 sectioned sagittal otoliths using a microscope under transmitted light and were counted up to 8 (42.0 cm TL) for both sexes. Edge analysis indicated that growth rings in otoliths were deposited once per year, and the opaque zone was formed in December. The von Bertanlanffy growth function (VBGF) best fit the observed length at age data for R. sarba. The growth parameters (±standard error) of VBGF for R. sarba (all data-pooled) were estimated as: L = 53.94 ± 3.71 cm TL, k = 0.217 ± 0.033 yr-1, t0 = –0.182 ± 0.167 yr (n = 447). Total mortality estimated from a length converted catch curve was 0.655 yr-1, age-specific natural mortality and fishing mortality were estimated as 0.789–0.293 yr-1 and 0.109–0.365 yr-1, respectively. The exploitation rate was estimated to be 0.440.

© 2019 by University of Hawai‘i Press. All rights reserved.
Shoou-Jeng Joung, Yu-Yung Shyh, Kwang-Ming Liu, and Shyh-Bin Wang "Age, Growth and Mortality of the Goldlined Seabream Rhabdosargus sarba in Waters off Southwestern Taiwan," Pacific Science 73(3), 389-402, (1 July 2019). https://doi.org/10.2984/73.3.6
Accepted: 1 April 2019; Published: 1 July 2019
JOURNAL ARTICLE
14 PAGES


Share
SHARE
KEYWORDS
catch curve
edge analysis
otolith
tag and recapture
von Bertalanffy growth function
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top