文章摘要
环境与摄食对山东省近海鱼礁区不同体长许氏平鲉分布的影响
Effects of Environment and Feeding Factors on the Distribution of Different Body Lengths of Sebastes schlegeli in the Reef Areas of Shandong Province
投稿时间:2019-05-24  修订日期:2019-07-25
DOI:
中文关键词: 许氏平鲉  体长  分布  环境因子  摄食  典范对应分析
英文关键词: Sebastes schlegeli  body length  distribution  environmental factors  feeding  canonical correspondence Analysis
基金项目:山东省海洋与渔业科技创新项目(2017HYCX007);山东省海洋与渔业厅“人工鱼礁区渔业资源调查”项目资助
作者单位E-mail
唐衍力 中国海洋大学水产学院 tangyanli@ouc.edu.cn 
解涛 中国海洋大学水产学院  
于浩林 中国海洋大学水产学院  
虎琦 中国海洋大学水产学院  
刘岳 中国海洋大学水产学院  
张萌萌 中国海洋大学水产学院  
方光杰 中国海洋大学水产学院  
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中文摘要:
      为研究环境与摄食因素对人工鱼礁区许氏平鲉Sebastes schlegeli分布的影响,本文采用2017 - 2018年山东省近岸3处鱼礁区环境和渔业资源的调查数据,利用变异系数CV均值将样本的体长分为10组,每组体长间隔为33 mm,并使用Bray-Curtis相似性指数比较不同海域许氏平鲉体长组成的相似性;运用去趋势对应分析(DCA)、典范对应分析(CCA)分析各环境要素对不同体长组许氏平鲉分布的影响;运用胃含物分析法分析许氏平鲉的食物组成。结果显示:西霞口与长岛鱼礁区样本体长组成相似性指数为70.66%,前三岛鱼礁区与西霞口和长岛礁区的相似性指数较低,分别为54.94%和59.46%;较大体长(299-365mm)的许氏平鲉的分布与水深、WQI和化学需氧量(COD)相关性较大,喜好水深较深,富营养的水域,小体长(35 - 200 mm)的许氏平鲉喜好水深较浅,水质好的水域;大体长(200-365 mm),高龄(2-3龄)的个体主要摄食鱼类、虾类和蟹类,优势饵料为鱼类(IRI,%=65.94),小体长(35-200 mm),低龄(0-1龄)的个体主要摄食虾类和蟹类,优势饵料为虾类(IRI,%=45.69)。经过本文研究得出结论,在浅水区域投放幼鱼保护型鱼礁,为幼鱼提供庇护所;将捕捞集中在深水区,减少对许氏平鲉小体长个体的兼捕,可以达到针对性增殖保护许氏平鲉资源的目的。
英文摘要:
      In order to study the impact of environmental and feeding factors on the distribution of rockfish Sebastes schlegeli in artificial reefs, using survey data on the environment and fishery resources of three reef areas in Shandong Province from 2017 to 2018. Using the mean of the coefficient of variation to divide the body length of the sample into 10 groups, each with a length of 33 mm, and using the Bray-Curtis similarity index to compare the similarity of the body length composition of rockfish in different regions; using detrended correspondence Analysis (DCA) and canonical correspondence Analysis (CCA) to describe The effects of environmental factors on the rockfish distribution of different body length groups; the composition of the food of rockfish was analyzed by using the stomach contents analyses . The results showed that the body length composition similarity index of Xixiakou and Changdao artificial reef area was 70.66%, Compared with Xixiakou and Changdao, the Qiansandao artificial reef area has a low similarity index with them, which is 54.94% and 59.46% respectively.; the distribution of rockfish with larger body type (299-365 mm) is more correlated with depth, WQI and chemical oxygen demand (COD), prefers live in a deep, nutrient-rich environment, small body type (35 - 200 mm) rockfish prefers environment with shallow depth and good water quality; small body length (200-365 mm), older (2-3 years old), mainly consume fish, shrimp and crabs, and the dominant bait is fish (IRI, %=65.94), small body length (35-200 mm), younger (0-1 year old) individuals mainly feed on shrimp and crab, the dominant bait is shrimps (IRI, %=45.69). According to the research in this paper, it is concluded that the application of juvenile-fish-protected artificial reefs in shallow water can provide shelter for juvenile fish; the concentration of fishing in deep water can reduce the bycatch of juvenile fish,then rockfish resources can be proliferated and protected.
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