Chinese Journal of Oceanology and Limnology

, Volume 31, Issue 2, pp 327–333

Relationship between trawl selectivity and fish body size in a simulated population

  • Peng Sun (孙鹏)
  • Zhenlin Liang (梁振林)
  • Liuyi Huang (黄六一)
  • Yanli Tang (唐衍力)
  • Xin He (何鑫)
Article

DOI: 10.1007/s00343-013-2254-4

Cite this article as:
Sun, P., Liang, Z., Huang, L. et al. Chin. J. Ocean. Limnol. (2013) 31: 327. doi:10.1007/s00343-013-2254-4

Abstract

Trawl is a main fishing gear in Chinese fishery, capturing large fish and letting small ones at large. However, long-term use of trawl would result in changes of phenotypic traits of the fish stocks, such as smaller size-at-age and earlier age-at-maturation. In this study, we simulated a fish population with size characteristics of trawl fishing and the population produces one generation of offspring and lives for one year, used trawl to exploit the simulated fish population, and captured individuals by body size. We evaluated the impact of the changes on selectivity parameters, such as selective range and the length at 50% retention. Under fishing pressure, we specified the selectivity parameters, and determined that smaller selection rates and greater length at 50% retention were associated with an increased tendency towards miniaturization.

Keyword

selectivity parameters trawl selectivity simulated population 

Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Peng Sun (孙鹏)
    • 1
  • Zhenlin Liang (梁振林)
    • 2
  • Liuyi Huang (黄六一)
    • 1
  • Yanli Tang (唐衍力)
    • 1
  • Xin He (何鑫)
    • 1
  1. 1.College of FisheriesOcean University of ChinaQingdaoChina
  2. 2.College of MarineShandong University at WeihaiWeihaiChina

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