근해 유자망에 의해 어획되는 참조기자원의 관리를 위한 가입당 산란자원량 모델의 비교분석
Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science
2
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
Yield per recruit model is the most popular method for fisheries stock assessment. However, stock assessment using yield per recruit model can lead to recruitment overfishing as this model only considers the maximum yield per recruit without spawning biomass for reproduction. For this reason, spawning biomass per recruit model which reveals variations of spawningstock biomass per fishing mortality (F) and age at first capture (tc) is considered as more proper method for stock assessment. There are mainly two methods for spawning biomass per recruit model known as age specific selectivity method and knife–edged selectivity method. In the knife–edged selectivity method, the spawning biomass per recruit has been often calculated using biomass per recruit value by multiplying the maturity ratio of the recruited age. But the maturity ratio in the previous method was not considered properly in previous studies. Therefore, a new method of the knife–edged selectivity model was suggested in this study using a weighted average of the maturity ratio for ages from the first capture to the lifespan. The optimum fishing mortality in terms of F35% which was obtained from the new method was compared to the old method for small yellow croaker stock in Korea. The value of F35% using the new knife–edged selectivity model was 0.302/year and the value using the old model was 0.349/year. However, the value of F35% using the age specific selectivity model was estimated as 0.320/year which was closer to the value from the new knife–edged selectivity model.
Abstract
Yield per recruit model is the most popular method for fisheries stock assessment. However, stock assessment using yield per recruit model can lead to recruitment overfishing as this model only considers the maximum yield per recruit without spawning biomass for reproduction. For this reason, spawning biomass per recruit model which reveals variations of spawningstock biomass per fishing mortality (F) and age at first capture (tc) is considered as more proper method for stock assessment. There are mainly two methods for spawning biomass per recruit model known as age specific selectivity method and knife–edged selectivity method. In the knife–edged selectivity method, the spawning biomass per recruit has been often calculated using biomass per recruit value by multiplying the maturity ratio of the recruited age. But the maturity ratio in the previous method was not considered properly in previous studies. Therefore, a new method of the knife–edged selectivity model was suggested in this study using a weighted average of the maturity ratio for ages from the first capture to the lifespan. The optimum fishing mortality in terms of F35% which was obtained from the new method was compared to the old method for small yellow croaker stock in Korea. The value of F35% using the new knife–edged selectivity model was 0.302/year and the value using the old model was 0.349/year. However, the value of F35% using the age specific selectivity model was estimated as 0.320/year which was closer to the value from the new knife–edged selectivity model.
참고문헌 (22)
- Beverton RJH, "On the Dynamics of Exploited Fish Populations, Fishery Investigations, Series Ⅱ, Marine Fisheries", Great Britain, Great Britain Ministry of agriculture, Fisheries and Food, 19, pp.533~ (1957)
- 조상만, "한산도 진두해역 양식 바지락의 자원생태학적 연구", The Korean Journal of Malacology, 23(1), pp.25~30 (2007), 한국패류학회
- Choi YM, "Stock assessment and management implications of chub mackerel,Scomber japonicus in Korean Waters", J Kor Soc Fish Res, 6(2), pp.90~100 (2004)
- 장성현, "담수산 어류 꺽지(Coreoperca herzi)의 자원 평가 및 관리 방안 연구: 섬진강 중∙상류 수계에서 꺽지의 자원량 및 잠재생산량 추정(2)", 생태와 환경, 44(2), pp.172~177 (2011), 한국하천호수학회
- 고준철, "가입당생산량 (yield-per-recruit) 모델을 이용한 제주 동부연안 오분자기류 (Haliotis diversicolor)의 어업관리", The Korean Journal of Malacology, 24(2), pp.143~151 (2008), 한국패류학회
- Kvamme C, "The effect of including length structure in yield–per–recruit estimates for Northeast Arcticcod", ICES J Mar Sci, 64, pp.357~368 (2007)
- 권대현, "칠게, Macrophthalmus japonicus De Haan 개체군 생태 및 자원관리", 박사, 해양생물학, pp.2010
- 권유정, "잉여생산량을 추정하는 모델과 파라미터 추정방법의 비교", 한국어업기술학회지, 49(1), pp.18~28 (2013), 한국어업기술학회
- 이재봉, "환경요인을 결합한 연령구조 재생산모델에 의한 자원량 및 가입량 예측", 한국어업기술학회지, 48(4), pp.445~451 (2012), 한국어업기술학회
- 서영일, "한국 주변해역 참조기의 자원생태학적 특성치 추정", 한국어업기술학회지, 49(4), pp.440~448 (2013), 한국어업기술학회[DOI]
- Lee MW, "Age determination and estimation of growth parameters using otoliths of small yellow croaker, Pseudosciaena polyactis Bleeker in Korean Waters", Bull. Kor Soc Fish Tech, 36, pp.222~233 (2000)
- Soo Jeong Lee, "Stock assessment of elkhorn sculpin (Alcichthys alcicornis) along the Uljin area of Korea", 석사, 수산물리학, pp.2011
- 박경동, "통영바다목장에 서식하는 조피볼락 (Sebastes schlegelii)의 자원생태", 박사, 해양생물학, pp.2008
- Park YC, "Growth and carrying capacity of pacific oyster, crassopstrea gigas, in Kamak Bay, Korea", Korean J Environ Biol, 20(4), pp.378~385 (2002)
- Pauly D., "Length–converted catch curves. A powerful tool for fisheries research in the tropic (Part 2)", ICLARM Fishbyte, 2, pp.9~10 (1984)
- Seo YI, "A Study on the multi–gear and multi–species fisheries assessment models in Korean Waters", J Kor Fish Soc, 34(4), pp.355~358 (2001)
- Ye Y, "Assessing effects of closed seasons in tropical and subtropical penaeid shrimp fisheries using a length–based yield–per–recruit model", ICES J Mar Sci, 55, pp.1112~1124 (1998)
- Zhang CI., "Fisheries Resources Ecology", pp.1~399 (1991), Woosung Publishing Co
- Zhang CI, "Fisheries Science Series #1. Marine Fisheries Resources Ecology", pp.1~561 (2010), Pukyong National University Press
- Zhang CI, Kim SA and Yoon SB, "Stock assessment and management implications of small yellow croaker in Korean Waters", Bull Kor Fish Soc, 25, pp.282~290 (1992)
- Zhang CI, "Stock assessment and management implications of horse mackerel in Korean Waters, based on the relationships between recruitment and the ocean environment", Prog. Oceanogr., 49, pp.513~537 (2001)
- Zhang CI, "A revised Alverson and Carney model for estimating the instantaneous rate of natural mortality", Trans Amer Fish Soc, 135(3), pp.620~633 (2006)