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저층 삼중자망에 대한 동해안산 고무꺽정이 (Dasycottus setiger )의 망목 선택성

Mesh selectivity of the bottom trammel net for spinyhead sculpin Dasycottus setiger in the eastern coastal sea of Korea

박창두|배재현
한국수산해양기술학회 (The Korean Society of Fisheries and Ocean Technology)|2017.11|수산해양기술연구 (Journal of the Korean Society of Fisheries and Ocean Technology)|제53권 제4호|pp. 317-326|DOI http://dx.doi.org/10.3796/KSFT.2017.53.4.317

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참고문헌

키워드

Selectivity선택성Gill net최우법Trammel net고무꺽정이삼중자망Spinyhead sculpinDasycottus setiger
주제분류수산학

초록

동해안 울진 연안 수역에서 외망의 망목크기는 일정하고 내망의 망목 크기가 다른 저층 삼중자망을 사용하여 어획시험을 수행하고 고무꺽정이에 대한 망목선택성을 추정하였다. 고무꺽정이에 대한 삼중자망의 망목 선택성은 SELECT 모델을 사용하여 추정하였다. 망목 선택성을 표현하는 함수 모델은 종형 함수 3종류 (정규함수, 대수정규함수, 이봉성정규함수)와 S자형 Logistic 함수를 적용하였다. 각 함수 모델의 일탈도 및 AIC 비교를 통하여 최적 망목선택성 곡선으로 상대어획강도 일정의 대수정규함수가 채택되었다. 선택률 1.0을 나타내는 최적 상대 전장은 2.492로 추정되었다. 자망에 대한 고무꺽정이의 망목선택성 결과와 비교하면 선택률 1.0을 나타내는 최적 상대 전장은 차이가 적으나, 50%선택범위는 삼중자망이 홑자망에 비하여 큰 값을 나타내었다.

Abstract

Comparative fishing experiments were conducted in the eastern coastal waters near Uljin, Korea from 2002 to 2004, using the experimental trammel nets to estimate the selectivity for spinyhead sculpin Dasycottus setiger. The inner panels of the nets were made of nylon monofilament with four mesh sizes (82.2, 89.4, 104.8, and 120.2 mm) while its two outer panels were made of twisted nylon multifilament with a mesh size of 510 mm. The SELECT (Share Each Length’s Catch Total) procedure with maximum likelihood method was applied to obtain a master selection curve. The different functional models (normal, lognormal, bi-normal, and logistic model) were fitted to the catch data. The lognormal model with the fixed relative fishing intensity was chosen as the best-fitted selection curve through comparison of model deviance and AIC (Akaike’s Information Criterion). The optimum relative length (the ratio of fish total length to mesh size) with the maximum relative efficiency was obtained as 2.492.

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관련 논문AI추천

동해안 자망에 대한 고무꺽정이 (Dasycottus setiger)의 망목 선택성김인옥, 박창두, 배재현, 안희춘, 조삼광한국수산해양기술학회 · 수산해양기술연구2016 · 제52권 제4호가자미 삼중자망의 망목 선택성김성훈, 이주희한국수산해양기술학회 · 수산해양기술연구2002 · 제38권 제2호동해의 장구형 통발에 대한 빨간횟대(Alcichthys alcicornis)의 망목선택성김현영, 박창두, 박해훈, 배재현, 백철인, 안희춘, 정의철, 조삼광한국수산해양기술학회 · 수산해양기술연구2004 · 제40권 제4호저층 트롤의 끝자루 망지 형상에 따른 어획 선택성 연구 - 단일 사각 망지를 이용한 두 어종의 선택성 비교 -김성훈, 백세나한국수산해양기술학회 · 수산해양기술연구2025 · 제61권 제2호비균등한 어획노력량 및 샘플량인 경우의 SELECT 모델을 이용한 세고리물레고둥(Buccinum opisoplectum Dall)의 장구형 통발에 대한 망목선택성: 예비분석김인옥, 김현영, 박해훈, 신종근, 안희춘, 정의철, 차봉진, Russell B. Miller한국수산해양기술학회 · 수산해양기술연구2005 · 제41권 제4호우리나라 동해안 북형 통발에 대한 물레고둥(Buccinum striatissimum)의 망목 선택성에 관한 연구김병관, 김성훈, 박창두, 정성재한국수산해양기술학회 · 수산해양기술연구2020 · 제56권 제3호

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