CAJ | 학술논문

根据 1983、 1993和 1999年冬季在渤海越冬场拖网试捕采集的渔获量资料，分析研究了渤海渔业生物地方种群的种类组成、生物量指数和优势种群的年间变化。资源量呈逐年大幅度减少之势，平均网获量分别为 11 5kg/h、 3 5kg/h和 0 7kg/h，平均网获尾数则为 669尾 /h、 145尾 /h和 37尾 /h；群落结构和优势种发生了明显的变化， 1983～ 1993年的优势种群梅童和孔鳐等经济底层鱼类为安氏新银鱼所替代。捕捞过度是经济种群资源量剧减的主要原因，强化渔政管理，开展经济种群的种苗放流是保护、恢复和增殖渔业资源的主要措施和途径。
근거 1983、 1993화 1999년동계재발해월동장타망시포채집적어획량자료，분석연구료발해어업생물지방충군적충류조성、생물량지수화우세충군적년간변화。자원량정축년대폭도감소지세，평균망획량분별위 11 5kg/h、 3 5kg/h화 0 7kg/h，평균망획미수칙위 669미 /h、 145미 /h화 37미 /h；군락결구화우세충발생료명현적변화， 1983～ 1993년적우세충군매동화공요등경제저층어류위안씨신은어소체대。포로과도시경제충군자원량극감적주요원인，강화어정관리，개전경제충군적충묘방류시보호、회복화증식어업자원적주요조시화도경。
By the bottom trawl surveys in the overwintering ground of the Bohai Sea in the winter of 1983,1993 and 1999,the yearly variations of species composition,abundance index and dominant species of endemic stocks were analyzed The abundance trended to decrease dramatically,the average catch per haul was 11 5,3 5 and 0 7 kg/h,and average number of individuals per haul was 669,145 and 37 individual/h,respectively The community structure and dominant species obviously changed Those dominant species like Collichthys spp.and Raja porosa in 1983～ 1993 were replaced by Neosalanx anderssoni in 1999 Overfishing is the main cause for the sharp decrease of abundance in economic important species Strengthening fishery management,and implementing hatchery release are the main measures and approaches to conserving,rehabilitating and enhancing fishery resources in the Bohai Sea