태평양 대구(Gadus macrocephalus)의 계군분석과 서식처 이용 양상 파악을 위한 이석의 미량화학 이용

Title
태평양 대구(Gadus macrocephalus)의 계군분석과 서식처 이용 양상 파악을 위한 이석의 미량화학 이용
Alternative Title
Use of otolith microchemistry to investigate the habitat use patterns and stock separation of fish population of Pacific Cod, Gadus macrocephalus
Author(s)
황선완; 홍지민; 이은경; 장요순
KIOST Author(s)
Hwang, Sunwan(황선완)Lee, Eun Kyung(이은경)
Publication Year
2017-11-09
Abstract
We analyzed trace elements in sagittal otoliths to examine the habitat use patterns and for stock separation of fish populations of Pacific Cod, Gadus macrocephalus. The samples were caught by commercial fishing gears from three marine fishery grounds in the coast of Korea (Daejin in the East Sea, Baekryeong-do in the Yellow Sea, and the Jinhae Bay in the South Sea) in December 2015 and January 2016. Trace elements in the otoliths were analyzed using LA-ICPMS of the Korea Basic Science Institute. The average ratio was 3.75 ± 0.94 × 10-3 (mean ± SD) in the core of the otolith. The otolith Sr/Ca ratios ranging from 0.61 × 10-3 to 13.97 × 10-3. We conclude from the otolith Sr/Ca ratios that G. macrocephalus spawns and grows in brackish water during the early part of its life cycle, and inhabited a broad range of salinities, including seawater and brackish water, during their lifetime. nMDS analysis with 7 elements/Ca ratios in the otolith in each specimens showed that there might be two different stocks (Yellow Sea cod and East/South Sea cod) and more than two different spawning stocks in the coast of Korea. The findings of our study offer useful new information on the habitat use and stock separation of G. macrocephalus, allowing more sustainable use of the species.ery grounds in the coast of Korea (Daejin in the East Sea, Baekryeong-do in the Yellow Sea, and the Jinhae Bay in the South Sea) in December 2015 and January 2016. Trace elements in the otoliths were analyzed using LA-ICPMS of the Korea Basic Science Institute. The average ratio was 3.75 ± 0.94 × 10-3 (mean ± SD) in the core of the otolith. The otolith Sr/Ca ratios ranging from 0.61 × 10-3 to 13.97 × 10-3. We conclude from the otolith Sr/Ca ratios that G. macrocephalus spawns and grows in brackish water during the early part of its life cycle, and inhabited a broad range of salinities, including seawater and brackish water, during their lifetime. nMDS analysis with 7 elements/Ca ratios in the otolith in each specimens showed that there might be two different stocks (Yellow Sea cod and East/South Sea cod) and more than two different spawning stocks in the coast of Korea. The findings of our study offer useful new information on the habitat use and stock separation of G. macrocephalus, allowing more sustainable use of the species.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23593
Bibliographic Citation
Korean Federation of Fisherise Science and Technology Societies International Conference 2017, pp.404, 2017
Publisher
한국수산과학총연합회
Type
Conference
Language
English
Publisher
한국수산과학총연합회
Related Researcher
Research Interests

Fish ecology,Eggs & larval fish identification,어류 생태연구,난자치어 형태분류

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