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한국 연근해 고등어(Scomber japonicus)의 성숙 및 산란 특성

Maturity and Spawning of the Chub Mackerel Scomber japonicus in the Korean Waters

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주제분류수산학

초록

We investigated the maturity and spawning dynamics of chub mackerel Scomber japonicus in Korean waters using samples collected by a large purse seine fishery from January 2013 to December 2017. We analyzed sex ratio, monthly maturity stage, gonadosomatic index (GSI), Fulton’s condition factor (K), and fork length at 50% group maturity. Spawning occurred from March to June, with a peak in May. We detected a significant difference in sex ratio (χ2 test, P<0.05). The relationship between fork length and body weight was expressed as BW=0.0025FL3.4693. We estimated 50% group maturity at a female fork length of 29.3 cm.

Abstract

We investigated the maturity and spawning dynamics of chub mackerel Scomber japonicus in Korean waters using samples collected by a large purse seine fishery from January 2013 to December 2017. We analyzed sex ratio, monthly maturity stage, gonadosomatic index (GSI), Fulton’s condition factor (K), and fork length at 50% group maturity. Spawning occurred from March to June, with a peak in May. We detected a significant difference in sex ratio (χ2 test, P<0.05). The relationship between fork length and body weight was expressed as BW=0.0025FL3.4693. We estimated 50% group maturity at a female fork length of 29.3 cm.

참고문헌 (38)

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