Comparisons of monthly and geographical variations in abundance and size composition of Pacific saury between the high-seas and coastal fishing grounds in the northwestern Pacific
Comparisons of monthly and geographical variations in abundance and size composition of Pacific saury between the high-seas and coastal fishing grounds in the northwestern Pacific
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DOI：
10.1007/s12562-009-0196-8
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发表时间：
2010-01-01
影响因子：
1.9
通讯作者：
Huang, Wen-Bin
中科院分区：
文献类型：
--
作者：
Huang, Wen-Bin
根据2000-2005年台湾渔业资料，比较了西北太平洋公海和沿海渔场秋刀鱼的月、地理丰度和大小组成。大型秋刀鱼占主导地位（44.3-71.4%的渔获量）在渔期开始，而中型秋刀鱼其次，占主导地位，从9月到渔期结束（70.1-92.4%的渔获量）。在公海，单位努力量的总渔获量（CPUE）（约为沿海平均值的71.2%）和大型（约55.0%）和中型秋刀鱼CPUE（约81.8%）均明显小于沿海沃茨。在公海捕捞量中，大型和中型秋刀鱼的平均比例分别约为沿海值的86.6%和107.0%。CPUE的总渔获量和渔获量的中型秋刀鱼变化高度一致的方式。总CPUE和中型CPUE与海水温度呈负相关。当温度相同时，总CPUE和中型CPUE在渔场的向岸、向南和较浅的沃茨较大，而大型CPUE在渔场的向岸沃茨较大。
The monthly and geographical abundances and size compositions of Pacific saury were compared between the high-seas and coastal fishing grounds in the northwestern Pacific during 2000-2005 based on Taiwanese fishery data. The large-sized saury was dominant (44.3-71.4% of the catch) in the beginning of the fishing season, while the medium-sized saury followed and dominated from September to the end of the fishing season (70.1-92.4% of the catch). In the high seas, the total catch per unit effort (CPUE) (about 71.2% of the mean coastal value) and both the large- (about 55.0%) and medium-sized saury CPUEs (about 81.8%) were significantly smaller than those in the coastal waters. The mean proportions of the large- and medium-sized saury in the high-seas catch were about 86.6 and 107.0% of the coastal values, respectively. CPUEs for the total catch and the catch of medium-sized saury varied in a highly consistent way. The total and medium-sized CPUEs were negatively correlated with the sea-water temperature. When the temperature was held the same statistically, the total and medium-sized CPUEs were larger in the shoreward, southward, and shallower waters of the fishing grounds, while the large-sized CPUE was larger in the shoreward waters.