东黄海带鱼资源变动的统计研究

发布时间：2018-03-07 08:22

本文选题：带鱼　切入点：资源变动　出处：《浙江海洋大学》2016年硕士论文　论文类型：学位论文

【摘要】：带鱼Trichiurus lepturus是中国的主要经济鱼类之一,从北海道以南的日本各地沿岸海域到东海、朝鲜半岛西岸及黄渤海均有分布,而且同属于日本海·东海带鱼群系。日本在东黄海海域对带鱼的捕获以大底拖网渔业、大中型围网渔业和近海底拖网渔业为主。本文根据日本水产厅1981年到2009年间的日本海·东海带鱼群系渔获量和单位努力量渔获量(CPUE)数据,对东黄海海域带鱼资源变动进行了统计研究,主要利用年龄结构产量模型(Age-structured production model,ASPM)评估了该海域带鱼群系的资源尾数和生物量,描述了带鱼的资源变动情况和发展趋势。结果表明,该海域带鱼群系的资源尾数持续下降,从1981年的1.7×107尾降至2009年的0.8×107尾。至于年龄组成,4到8龄的资源尾数急剧下降,从1997年开始几乎没有高年龄组资源。从1981年到1985年,带鱼种群生物量急剧减少,从7万吨降至不足3万吨。从2003年开始,种群生物量维持在一个较低的水平,低于1981年的10%。参数敏感性测试表明,相较于其他参数,陡度系数h和自然死亡系数M对模型的影响较大。当M的值越小时,评估的资源尾数越小;当h的值越大时,资源尾数下降的速率越慢,即补充的速率越快。
[Abstract]:Trichiurus lepturus is one of the major economic fishes in China, ranging from the coastal waters of Japan south of Hokkaido to the East China Sea, the West Bank of the Korean Peninsula and the Yellow Sea and Bohai Sea. In addition, they belong to the Sea of Japan / East China Sea belt fish formation. Japan catches the belt fish in the East Huang Hai sea area with a large bottom trawling fishery. The large and medium-sized purse seine fishery and the near seabed trawl fishery are the main ones. Based on the data of catch and catch per unit effort of the Sea of Japan / East China Sea tracheid from 1981 to 2009 by Japan Fisheries Agency, In this paper, the variation of tracheid resources in the eastern Huang Hai sea area was studied. The mantissa and biomass of the tubfish formation in the area were evaluated by Age-structured production model (ASPM), an age-structured yield model. This paper describes the resource variation and development trend of the tubfish in this area. The results show that the resource mendings of the tubfish formation in this area have continued to decrease, from 1.7 脳 10 ~ 7 in 1981 to 0.8 脳 10 ~ 7 in 2009. As for the age composition, the resource mendings of the 4th to 8th instar decreased sharply. Since 1997, there have been few resources for the higher age group. From 1981 to 1985, the biomass of the tubfish population decreased sharply, from 70,000 tons to less than 30,000 tons. Since 1985, the biomass of the population has remained at a relatively low level. The parameter sensitivity test shows that the steepness coefficient h and the natural death coefficient M have greater influence on the model than other parameters. The smaller the value of M is, the smaller the resource Mantissa is, and when the value of h is larger, The slower the decrease of resource Mantissa, the faster the rate of replenishment.
【学位授予单位】：浙江海洋大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：S932.4

【相似文献】