光诱罩网沉降性能对鸢乌贼渔获率的影响  

Relationship between sinking performance of light falling-net and catch rate of Sthenoteuthis oualaniensis

作　　者：晏磊[1] 李杰[1] 杨炳忠[1] 张鹏[1] YAN Lei;LI Jie;YANG Bingzhong;ZHANG Peng(Key Laboratory of Open-Sea Fishery Development,Ministry of Agricultur;Key Laboratory of South China Sea Fishery ResourcesExploitation ＆Utilization,Ministry of Agricultur;South China Sea Fisheries Research Institute,Chinese Academy FisherySciences,Guangzhou 510300,China)

机构地区：[1]中国水产科学研究院南海水产研究所农业部外海渔业开发重点实验室农业部南海渔业资源开发利用重点实验室,广东广州510300

出　　处：《南方水产科学》2018年第4期10-16,共7页South China Fisheries Science

基　　金：国家科技支撑计划项目(2013BAD13B06);农业部财政重大专项(NFZX2013);中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助(2016TS27)

摘　　要：根据2013—2016年南海光诱罩网船68个网次的作业数据,利用广义加性模型(generalized additive model,GAM)和Logistic回归模型,分析了沉降性能与鸢乌贼(Sthenoteuthis oualaniensis)渔获率之间的关系。结果表明,网具最大沉降深度的范围为53.53~103.10 m,平均沉降速度的范围为0.188~0.421 m·s^(–1),不同年份间最大沉降深度和平均沉降速度差异显著(P<0.05),2015年和2016年的最大沉降深度和平均沉降速度明显高于2013年和2014年;鸢乌贼渔获率及投网成功率均与最大沉降深度关系密切(P<0.1),而与平均沉降速度关系不显著(P>0.1)。渔获率整体上是随着最大沉降深度的增加而增大。为达到80%以上的投网成功率,建议最大沉降深度增加至90 m以上。Based on 68 sets of fishing data by light falling-net vessels in the South China Sea from 2013 to 2016, we analyzed the relationship between the sinking performance and catch rate of Sthenoteuthis oualaniensis by generalized additive model （GAM） and Logistic regression model. The results show that the range of the maximum sinking depth （D） and average sinking speed （S） were 53.53-103.10 m and 0.188-0.421 m· s^-1, respectively. The maximum sinking depth and average sinking speed varied significantly in different years （P〈0.05）, and these indicators in 2015 and 2016 were significantly higher than those in 2013 and 2014. GAM model and Logistic regression model show that the catch rate and successful fishing rate were related to the maximum sinking depth significantly （P〈0.1）, but were not related to the average sinking speed significantly （P〉0.1）. The catch rate increased with the maximum sinking depth in general. In order to reach 80% rate of successful fishing, it is suggested that the maximum sinking depth should be increased to 90 m or more.

关 键 词：鸢乌贼 罩网 沉降深度 沉降速度 渔获率 

分 类 号：S932.4[农业科学—渔业资源] S973.4[农业科学—水产科学]