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http://dx.doi.org/10.35399/ISK.31.3.3

Spawning Season, and Factors Influencing Allometric Growth Pattern and Body Condition of Walleye Pollock Gadus chalcogrammus in the Middle East Sea, Korea  

Lee, Chung Il (Department of Marine Bioscience, Gangneung-Wonju National University)
Han, Moon Hee (Department of Marine Bioscience, Gangneung-Wonju National University)
Jung, Hae Kun (Department of Marine Bioscience, Gangneung-Wonju National University)
Park, Hyun Je (Department of Marine Bioscience, Gangneung-Wonju National University)
Park, Joo Myun (Dokdo Research Center, East Sea Research Institute, Korean Institute of Ocean Science & Technology)
Publication Information
Korean Journal of Ichthyology / v.31, no.3, 2019 , pp. 141-149 More about this Journal
Abstract
This study presents data on spawning season, weight-length relationships (WLRs) and condition factor of Gadus chalcogrammus inhabiting the middle East Sea, Korea. Monthly changes in the gonadosomatic index (GSI) revealed that the spawning period was from December to March. Overall value of the exponent b, estimated by nonlinear least squares from weight and length data was 2.806, ranging from 2.778 for female fishes to 2.985 for immature group. The b values were similar between spawning and non-spawning, and between female and male fishes, but it was significantly higher for immature than mature fishes. The condition factors were significantly higher for immature than mature groups, and during non-spawning than spawning periods, but it was not significant between male and female fishes.
Keywords
Gadus chalcogrammus; GSI; weight-length relationship(WLR); condition factor; East Sea;
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