Cephalopods in the diet of swordfish (Xiphias gladius) caught off the west coast of Baja California, Mexico
Cephalopods in the diet of swordfish (Xiphias gladius) caught off the west coast of Baja California, Mexico
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DOI：
10.1353/psc.2005.0011
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发表时间：
2005-01-01
期刊：
影响因子：
0.7
通讯作者：
Hochberg, F. G.
中科院分区：
文献类型：
--
作者：
Markaida, Unai;Hochberg, F. G.
对1988 ~ 1996年在墨西哥下加利福尼亚西海岸捕获的175条剑鱼胃内容物中1,318个头足类动物的下喙进行了分析。共鉴定出20种条虫、4种章鱼和1种吸血虫。头足类的重量和长度是根据吻部的长度估计的。Ommastrephid鱿鱼，主要是不同成熟大小的巨型鱿鱼Dosidicus gigas，占60%的数量和82%的估计重量。生殖腺有三种，占总数的22%。一种未鉴定的Argonauta是最丰富的喙足类，占喙总数的5.8%。在加州海流中首次发现勒氏钩手线虫。讨论了头足类在加州海流中的分布及其在其他海洋捕食者食物中的大小。箭鱼的饮食主要是中型至大型肌肉鱿鱼物种，可能是吃表面沃茨在夜间。
The lower beaks of 1,318 cephalopods from the stomach contents of 175 swordfish, Xiphias gladius, caught off the west coast of Baja California, Mexico, between 1988 and 1996 were analyzed. In total, 20 species of teuthoids, 4 octopods, and one vampyromorph were identified. Weights and lengths of cephalopods were estimated from the lower rostral lengths. Ommastrephid squids, primarily jumbo squid Dosidicus gigas of different maturing sizes, composed 60% by number and 82% by estimated weight. Three species of gonatids were identified and represented 22% by number. An unidentified species of Argonauta was the most abundant octopod, with 5.8% of the beak total. Ancistrocheirus lesueurii is recorded for the first time in the California Current. Distribution of cephalopods in the California Current and their size in the diet of other marine predators are discussed. The diet of swordfish was dominated by medium to large muscular squid species that probably are eaten in surface waters at night.