CAJ | 학술논문

根据2007年12月～2008年3月采集的热带大西洋(05°37′～12°01′N、29°00′～36°51′W)金枪鱼延绳钓渔获物数据,分析了金枪鱼延绳钓兼捕鲨鱼的种类组成、渔获量、渔获率及其与表温的关系.本次调查共捕获鲨鱼8种,隶属3目7科7属, 总渔获尾数为633 ind,总渔获量达26 837.4 kg, 其中大青鲨为主要兼捕种类.各种鲨鱼渔获率平均值在0.003～1.524 ind/1 000 hooks之间, 其中大青鲨最高, 其值为1.524 ind/1 000 hooks,大眼砂锥齿鲨最低,其值为0.003 ind/1 000 hooks.各种鲨鱼渔获率月变化不明显(ANOVA, P=0.901).鲨鱼总渔获率和大青鲨渔获率与表温都呈显著性负相关.大青鲨主要出现渔场的表温范围为24.6～25.8 ℃.
근거2007년12월～2008년3월채집적열대대서양(05°37′～12°01′N、29°00′～36°51′W)금창어연승조어획물수거,분석료금창어연승조겸포사어적충류조성、어획량、어획솔급기여표온적관계.본차조사공포획사어8충,대속3목7과7속, 총어획미수위633 ind,총어획량체26 837.4 kg, 기중대청사위주요겸포충류.각충사어어획솔평균치재0.003～1.524 ind/1 000 hooks지간, 기중대청사최고, 기치위1.524 ind/1 000 hooks,대안사추치사최저,기치위0.003 ind/1 000 hooks.각충사어어획솔월변화불명현(ANOVA, P=0.901).사어총어획솔화대청사어획솔여표온도정현저성부상관.대청사주요출현어장적표온범위위24.6～25.8 ℃.
Based on catch data collected in the tropical Atlantic Ocean (05°37′N-12°01′N, 29°00′W-36°51′W) from December 2007 to March 2008, the species composition, catch, catch rate of bycatch sharks captured by tuna longline fishery and their relationship with sea surface temperature (SST) are analyzed. Altogether 633 individuals of fish are captured, which belong to 3 orders, 7 families, 7 genera and 8 fish species. The total weight of bycatch sharks is 26837.4kg. And the dominant bycatch shark is blue shark ( Prionace glauca ). Average catch rate of bycatch sharks is 0.003-1.524 individual per 1 000 hooks, of which blue shark is the highest, 1.524 individual per 1 000 hooks, and bigeye sand shark( Odontaspis noronhai ) lowest, 0.003 individual per 1 000 hooks. Catch rate of bycatch sharks shows no obvious monthly fluctuation (ANOVA, P=0.901). An obvious negative correlation is found between SST and catch rate of total bycatch shark and blue shark. The range of SST in the dominant fishing ground where blue sharks appear is 24.6-25.8℃.