Estimated distribution and movement of hairtail Trichiurus lepturus in the Aru Sea, based on the logbook records of trawlers
Estimated distribution and movement of hairtail Trichiurus lepturus in the Aru Sea, based on the logbook records of trawlers
复制标题
根据拖网渔船的航海日志记录估计带鱼在阿鲁海的分布和活动
DOI：
10.1046/j.1444-2906.2001.00192.x
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发表时间：
2001
影响因子：
1.9
通讯作者：
C. Ho
中科院分区：
文献类型：
--
作者：
Chao;T. Kawasaki;Kuo;C. Ho
摘要：利用四艘台湾商业拖网渔船的航海日志资料，对阿汝海带鱼种群的分布和运动进行了调查。讨论了种群数量、种群密度指数以及单位努力渔获量(CPUE)和捕捞努力量的分布。利用考虑捕捞月份、捕捞面积和带鱼大小类别的广义线性模型对CPUE数据进行了标准化处理。捕捞季节可分为3个阶段：3-4月间聚集，5-6月间分散，7-12月间再次聚集。带鱼种群数量的季节双峰型分布反映了聚集-分散的格局。5-6月的第一个高峰可以用带鱼的越冬迁徙来解释。10月至12月的第二个高峰可能是产卵聚集的结果。
SUMMARY: The distribution and movement of the hairtail Trichiurus lepturus stock in the Aru Sea were investigated using logbook data from four Taiwanese commercial otter trawlers. Fluctuations in population size, population density index and the distribution of catch per unit effort (CPUE) and fishing effort are discussed. The CPUE data were standardized by using the generalized linear model (GLM) in which fishing month, fishing area and size category of the hairtail were taken into account. The fishing season could be divided into three episodes: aggregation between March and April, dispersion between May and June, and aggregation again between July and December. A seasonal two-peak distribution of the population size of hairtail reflects the aggregation–dispersion pattern. The first peak in May–June can be explained in terms of the hairtails' overwintering migration. The second peak in October–December is likely to be the result of spawning aggregation.