Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Calculating growth parameters of Genidens barbus (Siluriformes, Ariidae) using length composition and age data

Calculating growth parameters of Genidens barbus (Siluriformes, Ariidae) using length composition... Summary The marine catfish Genidens barbus was once one of the most important estuarine fishery resources in the Patos Lagoon (southern Brazil), which had the largest population known for the species. However, clear signs of overfishing have been observed since the 1980s. Growth parameters for this population were estimated by combining length frequency data for juveniles and selected published data on annuli reading from adult otoliths. This methodology yielded a more realistic set of parameters using both the specialized and generalized von Bertalanffy growth model. The species growth can be described as: Lt = 118.6(1 − e−0.043(t+1.505)) or Lt = 104.6(1 −e−0.137D(t+4.013))1/D with the surface factor D = 0.542. The growth performance index ϕ′ was estimated as 2.78 for the special (classical) model. Stock rebuilding is expected to be slow, as the species is slow‐growing, has a low natural mortality rate, and mouthbreeds a small amount of large eggs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

Calculating growth parameters of Genidens barbus (Siluriformes, Ariidae) using length composition and age data

Loading next page...
 
/lp/wiley/calculating-growth-parameters-of-genidens-barbus-siluriformes-ariidae-LJLd0BuRFZ

References (19)

Publisher
Wiley
Copyright
Copyright © 2007 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0175-8659
eISSN
1439-0426
DOI
10.1111/j.1439-0426.2006.00793.x
Publisher site
See Article on Publisher Site

Abstract

Summary The marine catfish Genidens barbus was once one of the most important estuarine fishery resources in the Patos Lagoon (southern Brazil), which had the largest population known for the species. However, clear signs of overfishing have been observed since the 1980s. Growth parameters for this population were estimated by combining length frequency data for juveniles and selected published data on annuli reading from adult otoliths. This methodology yielded a more realistic set of parameters using both the specialized and generalized von Bertalanffy growth model. The species growth can be described as: Lt = 118.6(1 − e−0.043(t+1.505)) or Lt = 104.6(1 −e−0.137D(t+4.013))1/D with the surface factor D = 0.542. The growth performance index ϕ′ was estimated as 2.78 for the special (classical) model. Stock rebuilding is expected to be slow, as the species is slow‐growing, has a low natural mortality rate, and mouthbreeds a small amount of large eggs.

Journal

Journal of Applied IchthyologyWiley

Published: Feb 1, 2007

There are no references for this article.