초록

AI-Helper

1991년부터 1994년 사이에 한국 근해에서 대형선망에 어획된 수산생물의 종조성, 어획량, 분포의 계절 및 연 변동 양상을 파악하였다. 조사 기간 중 전체의 0.1%이상을 차지하는 주요 종은 19종이 출현하였으며, 그중 고등어(Scomber japonicus)가 전체 생체량의 54.7%, 정어리 (Sardinops melanostictus) 20.4%, 전갱이 (Trachurus japonicus) 9.1% 그리고 삼치(Scomberomorus niphonius) 6.2%로 이들 부어류 4종이 전체의 90% 이상을 차지하였다. 어획노력량은 봄부터 높아져 여름에 최고였고 가을철까지 높았으나, 단위노력당 어획량은 가을부터 높아져 겨울에 최고를 보였고 봄까지 높게 나타났다. 이는 산란과 섭이를 위해 남북 이동을 하여 여름동안 분산되었던 부어류가 겨울철에는 월동장으로 회유하여 위집됨으로써 어획률이 높았기 때문으로 판단된다.

Abstract ▼ AI-Helper

Spatio-temporal variation in species composition, abundance and distribution of fisheries resources caught by large purse seine off Korea from 1991 to 1994 was analysed. Out of 19 species, Scomber japonicus (54.7%), Sardinops melanostictus (20.4%), Trachurus japonicus (9.1%), and Scomberomorus nipho...

Spatio-temporal variation in species composition, abundance and distribution of fisheries resources caught by large purse seine off Korea from 1991 to 1994 was analysed. Out of 19 species, Scomber japonicus (54.7%), Sardinops melanostictus (20.4%), Trachurus japonicus (9.1%), and Scomberomorus niphonius (6.2%) were predominated in catch. These 4 pelagic fishes occupied 90% of total catch. Major pelagic fishes caught by large purse seine were dispersed to northward from spring to summer, and migrated to the southern wintering ground during winter. Fishing effort (number of haul) was high in summer, but catch per unit effort showed a peak in winter. The high CPUE in winter seemed to be related to aggregation of the pelagic fish to the wintering ground in the southern sea. After spawning, they were widely dispersed for feeding in warm months.