• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.51 no.4
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• pp.535-544
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• 2015

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 spawning stock biomass per fishing mortality (F) and age at first capture ($t_c$) 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 $F_{35%}$ which was obtained from the new method was compared to the old method for small yellow croaker stock in Korea. The value of $F_{35%}$ 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 $F_{35%}$ 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.

• 베이커리
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• no.6 s.371
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• pp.56-59
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• 1999

• 베이커리
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• no.1 s.330
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• pp.60-62
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• 1996

• 베이커리
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• no.10 s.351
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• pp.70-71
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• 1997

• 베이커리
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• no.3 s.320
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• pp.49-49
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• 1995

• 베이커리
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• no.9 s.350
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• pp.76-77
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• 1997

• 베이커리
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• no.1 s.390
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• pp.56-57
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• 2001

• 베이커리
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• no.9 s.326
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• pp.124-126
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• 1995

• 베이커리
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• no.7 s.312
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• pp.108-110
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• 1994

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2003.04a
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• pp.39-39
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• 2003

과실류의 단맛 결정인자인 유리당의 함량을 계통별로 분석하여 생식 및 가공 식품의 원료로서 오디의 이용성을 높이고 오디의 과실화 촉진을 위한 기초자료를 제공함은 물론 오디 생산용 뽕나무 육종효율을 높이기 위하여 유전자원으로 보존 중인 뽕나무 계통에 대하여 결실 오디를 채취하여 유리당의 조성과 함량을 비교ㆍ분석하였다. 동시에 유리당의 함량이 높은 계통을 선발하여 수량, 과중, 당도 등 과실적 특성을 고려하여 오디생산용 계통으로서의 가능성을 검토하였다. (중략)