Distribution, body length, and abundance of blue shark and shortfin mako offshore of northeastern Japan, as determined from observed pelagic longline data, 2000–2014
Distribution, body length, and abundance of blue shark and shortfin mako offshore of northeastern Japan, as determined from observed pelagic longline data, 2000–2014
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根据 2000 年至 2014 年观测到的中上层延绳钓数据确定的日本东北部近海大青鲨和短鳍灰鲭鲨的分布、体长和丰度
DOI：
10.1111/fog.12149
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发表时间：
2016
影响因子：
2.6
通讯作者：
K. Yokawa
中科院分区：
文献类型：
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作者：
S. Ohshimo;Y. Fujinami;K. Shiozaki;M. Kai;Y. Semba;N. Katsumata;D. Ochi;H. Matsunaga;H. Minami;M. Kiyota;K. Yokawa
2000 年至 2014 年，使用包租的商业延绳钓船在西北太平洋进行了延绳钓调查。每年四月中旬至六月中旬，日本东北部近海都会进行两次巡航。对于调查期间设置的每条延绳钓，船上的科学家收集了有关捕获物种的详细生物学信息，例如大小和性别，并记录了所有物种的捕获数量。蓝鲨 (Prionace glauca) 和短鳍灰鲭鲨 (Isurus oxyrinchus) 具有广温分布，但广义相加模型 (GAM) 的应用表明，短鳍灰鲭鲨阳性捕捞地点的海面温度 (SST) 比蓝鲨的海面温度更高。根据 GAM，两种鲨鱼出现的概率因大小类别而异：小鲨鱼的海温范围比大鲨鱼窄。这两种鲨鱼的捕获量大部分都是幼鲨，大青鲨的名义捕获率是短鳍灰鲭鲨的10倍以上。两个物种的单位努力标准化捕获量 (CPUE) 是使用具有负二项式误差的广义线性模型 (GLM) 或 delta 对数正态 GLM 计算的。蓝鲨第二季度标准化CPUE在2000年代中期达到峰值，随后下降，但自2012年以来一直在上升。短鳍灰鲭鲨第二季度CPUE总体呈上升趋势，但有波动。
Longline surveys have been conducted in the Northwest Pacific Ocean from 2000 to 2014 using chartered commercial longline vessels. Each year, two cruises were conducted offshore of northeastern Japan from mid-April to mid-June. For each longline set during the surveys, onboard scientists collected detailed biological information about the species caught, such as the size and sex, and recorded the catch numbers for all species. Blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) have eurythermal distributions, but the application of a generalized additive model (GAM) showed that the sea surface temperatures (SSTs) at catch sites positive for shortfin mako were warmer than those for blue shark. On the basis of the GAM, the probabilities of occurrence of both sharks differed by size category: small sharks had a narrower SST range than that of large sharks. Most catches of both sharks were juveniles, and the nominal catch rate of blue shark was more than 10 times that of shortfin mako. The standardized catch per unit effort (CPUE) for both species was calculated using a generalized linear model (GLM) with negative binomial errors, or a delta-lognormal GLM. The standardized CPUE for blue shark in the second quarter of the year peaked in the mid-2000s and then decreased, but it has been increasing since 2012. The CPUE for shortfin mako in the second quarter generally increased, with fluctuations.
北太平洋西部过渡区的蓝鲨 (Prionace glauca) 和鲑鲨 (Lamna ditropis) 的食性
DOI：
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发表时间：
2007
期刊：
Reviews in Fish Biology and Fisheries 17(2-3)
影响因子：
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作者：
Kubodera;T.;Watanabe;H. and Ichii;T.
通讯作者：
T.
Takahashi, K.：“印度洋东南部现代颗石藻生物地理学的环境控制”海洋微古生物学。
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