Food habits of three shark species from the Mississippi Sound in the northern Gulf of Mexico
Food habits of three shark species from the Mississippi Sound in the northern Gulf of Mexico
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DOI：
10.1656/1528-7092(2003)002
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发表时间：
2003-01-01
影响因子：
0.6
通讯作者：
Parsons, GR
中科院分区：
文献类型：
--
作者：
Hoffmayer, ER;Parsons, GR
胃内容物进行了检查，从289大西洋sharpnose，Rhizoprionodon terraenoquillo，120黑鳍，Carcharhinus limbatus，和66细齿，Carcharhinus isodon，鲨鱼收集从密西西比海峡，和发生的频率（% F）的每一个猎物的项目确定为每个鲨鱼物种。陆纹齿鲨的食物多样性最高，其中硬骨鱼类（67.0%），甲壳类（37.0%），软体动物（8.0%）和板鳃类（2.5%）。Carcharhinus limbatus和C.等齿鱼主要以硬骨鱼为食，在含有猎物的胃中，分别有94%和100%的硬骨鱼出现。所有鲨鱼物种都表现出中等至高水平的食物重叠，其中C。limbatus和C.等齿线个体发育的转变，观察到的饮食习惯的R。陆地生态系统中，幼鲨主要以无脊椎动物为食（65.2%），成年鲨主要以硬骨鱼类（69.0%）和板鳃类（5.8%）为食。
Stomach contents were examined from 289 Atlantic sharpnose, Rhizoprionodon terraenovae, 120 blacktip, Carcharhinus limbatus, and 66 finetooth, Carcharhinus isodon, sharks collected from the Mississippi Sound, and the frequency of occurrence (% F) of each prey item was determined for each shark species. Rhizoprionodon terraenovae consumed the highest diversity of prey items, which included teleost fishes (67.0%), crustaceans (37.0%), mollusks (8.0%) and elasmobranchs (2.5%). Carcharhinus limbatus and C. isodon fed primarily on teleost fishes, which occurred in 94 % and 100 %, respectively, of stomachs that contained prey. All shark species exhibited a medium to high level of dietary overlap, with the highest level of overlap found between C. limbatus and C. isodon. An ontogenetic shift was observed in the dietary habits of R. terraenovae with young sharks feeding primarily on invertebrate prey (65.2%), and adult sharks feeding primarily on teleosts (69.0%) and elasmobranchs (5.8%).