胶南近海金乌贼生长特性、资源分布及增殖放流效果初步评价

发布时间：2018-01-22 12:50

本文关键词： 金乌贼增殖放流时空分布生长分子标记胶南资源密度　出处：《中国海洋大学学报(自然科学版)》2017年07期 　论文类型：期刊论文

【摘要】：根据2015年8—10月开展的4次金乌贼跟踪回捕调查,对灵山湾及胶南近海金乌贼的生长、分布、资源密度及增殖放流效果进行了初步评价。研究显示:在金乌贼群体资源生物量密度和尾数密度方面,8月28日平均生物量和尾数最低,10月4日平均尾数密度最高,10月26日平均生物量最高,且灵山岛西南海域的相对资源密度显著高于灵山湾海域,各航次幼乌贼出现频率均为100%;伴随幼乌贼的生长,资源高密度区由灵山湾向灵山岛西南海域的深水区逐步偏移。调查期间幼乌贼生长迅速,胴长(ML)总平均增长率为0.46mm/d,体重(TW)总平均增长率为0.46g/d,胴长-体重关系式为TW=8.0×10~(-4) ML~(2.6642),胴长、体重与日龄均呈S型曲线关系。分子检测结果表明,在随机抽测的4个航次共288只回捕个体中,有14只个体在6个微卫星位点上可找到与其对应的亲本,判定为放流苗种,占随机抽测的回捕个体的比例约4.86%,放流初期金乌贼增殖效果显著。本研究为金乌贼增殖放流提供了基础数据,为放流后金乌贼资源的科学养护、合理开发提供了科学依据,有助于金乌贼增殖放流管理策略的制定。
[Abstract]:According to the investigation of four times of the tracking and back arrest of the cuttlefish in 2015, the growth and distribution of the squid in Lingshan Bay and the coastal waters of Jiaonan were studied. The results showed that in August 28th, the average biomass and Mantissa density of the population were the lowest in terms of resource density and Mantissa density. The average Mantissa density was the highest in October 4th and the highest in October 26th, and the relative resource density in the southwest of Lingshan Island was significantly higher than that in Lingshan Bay. Along with the growth of juvenile squid, the resource high density area gradually shifted from Lingshan Bay to the deep water area in the southwest of Lingshan Island. During the investigation, the juvenile squid grew rapidly, and the average growth rate was 0.46 mm / d. The average growth rate of TW was 0.46g / d, and the relationship between mantle length and body weight was TW=8.0 脳 10 ~ (-4) MLT _ (2.6642). The results of molecular detection showed that out of 288 individuals sampled randomly, 14 individuals could find their parents at 6 microsatellite loci. It was determined that it was a seeding species, which accounted for about 4.86% of the randomly sampled individuals, and the effect of multiplication was remarkable in the early stage of release. This study provided the basic data for the proliferation and release of the squid. It provides a scientific basis for the scientific conservation and rational development of golden squid resources after release, and is helpful to the formulation of the management strategy for the proliferation and release of golden cuttlefish.
【作者单位】：海水养殖教育部重点实验室(中国海洋大学);
【基金】：国家自然科学基金项目(41676153) 国家海洋公益性行业科研专项(201405010;201305043)资助~~
【分类号】：S917.4;S931
【正文快照】： 金乌贼(Sepia　esculenta)隶属于软体动物门(Mol-流数量达到60余万只。其中,青岛灵山湾是山东省金lusca)头足纲(Cephalopoda)乌贼目(Sepioidea)乌贼科乌贼最主要的增殖放流区。(Sepiidae)乌贼属(Sepia),主要分布于日本北海道以目前,国内外部分学者相继开展了金乌贼的形态南、

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