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基于水下摄像的渔山列岛厚壳贻贝资源评估与分析

发布时间:2019-05-24 09:57
【摘要】:厚壳贻贝是我国东部沿海重要的经济贝类之一,自然环境中栖息范围不甚明确。本文于2014年7月间利用水下摄像的手段,调查和分析了渔山列岛不同断面上厚壳贻贝的自然分布特征。结果表明:渔山列岛潮下带5条断面的生态类型差异显著,不同断面栖息的优势种也不相同;断面间厚壳贻贝的栖息密度均值为37.04~185.80ind/m2,其中断面A的栖息密度最低,断面E的栖息密度最高,断面C和断面D的栖息密度相差不大,但是不同调查样方内厚壳贻贝的栖息密度从0~388.89ind/m2不等;厚壳贻贝主要分布在水深3~9m的水层中,其中以水深5~8m的水层中最为密集,约占总栖息密度的90%以上;在水深8m的区带上,厚壳贻贝的栖息密度为160.19ind/m2,当水深小于1m和大于11m时,厚壳贻贝分布极少;经双因素方差分析表明,厚壳贻贝栖息密度在不同断面(F=57.011,P0.01)和不同水层(F=66.495,P0.01)中的差异均极显著,断面和水层的交互作用(F=10.483,P0.01)对厚壳贻贝的自然分布也有极显著差异;经检验,厚壳贻贝栖息密度(A)的自然分布与水深(D)呈正态分布,可以用高斯方程拟合,R2的取值范围为0.875 3~0.999 7;利用聚类分析发现,调查样方被明显的分为3组,体现了水深在厚壳贻贝自然分布中的显著作用。
[Abstract]:Mussel is one of the important economic shellfish in the eastern coast of China, and the range of habitat in the natural environment is not very clear. In this paper, the natural distribution characteristics of mussel with thick shell on different sections of Yushan Islands were investigated and analyzed by means of underwater camera in July 2014. The results showed that the ecological types of 5 sections in the subtidal zone of Yushan Islands were significantly different, and the dominant species of habitat in different sections were also different. The average habitat density of thick shell mussel between sections was 37.04 脳 185.80 ind / m2, in which the habitat density of section A was the lowest, that of section E was the highest, and there was no significant difference between section C and section D. However, the habitat density of mussel with thick shell varied from 0~388.89ind/m2 to different samples. The thick shell mussel is mainly distributed in the water layer with a depth of 3 鈮,

本文编号:2484772

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