文章摘要
薄治礼.东海北部、黄海南部方头鱼资源调查[J].水产学报,2005,29(5):
东海北部、黄海南部方头鱼资源调查
Survey on Branchiostegus resourece in the north part of the East China Sea and in the southern part of Yellow Sea
投稿时间:2014-03-10  修订日期:2014-03-10
DOI:
中文关键词: 东海北部 黄海南部 方头鱼 资源调查
英文关键词: north part of the East China Sea southern part of Yellow Sea Branchiostegus stock survey
基金项目:浙江省海洋与渔业局资助项目
作者单位地址
薄治礼 浙江省海洋水产研究所 浙江省海洋水产研究所
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中文摘要:
      方头鱼属暖水性底层鱼类,据记载中国有4种.本文报导的是1998年8月-2004年6月在27?00′~34?00′N、128?00′E以西海域深水流网作业捕捞的日本方头鱼(Branchiostegus japonious)和白方头鱼(Branchiostegus albus)混合群体的生物学特性和资源状况.本海域方头鱼捕捞群体体长范围100~390 mm,平均体长223.9 mm.体重范围30~1470 g,平均体重231.5 g,捕捞群体1~9龄,以1~3龄为主,体长与体重关系呈幂函数曲线增长,雄鱼平均体长、体重比同龄雌鱼大,但肥满度雌鱼略高.捕捞群体雌、雄比例接近1∶1.2.浙江近海有产卵场,主要产卵期在4-8月.方头鱼属广食性肉食性鱼类,在繁殖期间不停食.本海域的日本方头鱼主群分布在126?00′E以东海域,白方头鱼主群分布在124?00′E以西海域,124?00′~126?00′E为混栖区域.方头鱼在深水流网作业渔获总重量中约占30%,居其它种类之首.目前方头鱼资源虽未见明显衰败,但与早期比较,其产量占深水流网总渔获量比重已明显下降.因此,必须合理利用,保护该种资源维持相对稳定.
英文摘要:
      Branchiostegus is a demersl fish in warm water. It is documented that there are four species of the fish in China water areas. Here are reported the biological characteristics and stock situation of Branchiostegus japonious and Branchiostegus albus mixcommunity which were captured by deep water drift net in the west of 27?00′ - 34?00′N, 128?00′E in the period ranging from Aug. 1998 to June 2004. The captured fish length was 100 - 390 mm, with the average length being 223.9 mm. Individual weight was 30 - 1470 g, with the average weight being 231.5 g. The captured fish was 1 - 9 yearling and predominant group was 1 - 3 yearling. The length was a power function of the weight. The average length and weight of male fish were greater than the female, while the female showed a little bit fatter. In the natural community, the ratio of female to male was approximately 1 : 1.2. There were spawning areas, and its period was from April through to Aug, The Branchiostegus is eury-carnivore. It would not stop taking food when breeding. The habitat areas of the main Branchiostegusjaponious were in the east of 126?00′E, while B. a/bus in the west of 124?00′E, both communities were found in 124?00′ - 126?00′E. The landing of Branchiostegus was about 30% of its total production, much more than other species. For the time being, Branchiostegus stock has not been found declining apparently. However, as compared with earlier time, its production rate in its total landing has declined a lot. Hence, it is imperative to exploit it wisely to realize sustainable development.
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