Prey and feeding patterns of resident bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida
Prey and feeding patterns of resident bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida
复制标题
DOI：
10.2307/1383114
复制
发表时间：
1998-08-01
影响因子：
1.7
通讯作者：
Wells, RS
中科院分区：
文献类型：
--
作者：
Barros, NB;Wells, RS
对佛罗里达州中西部沿海萨拉索塔湾地区的宽吻海豚(Tursioptruncatus)群落的胃内容物进行了研究，以考察导致栖息地利用模式的潜在因素。分析了猎物的组成和大小，并将其与已知历史的单个海豚的摄食行为进行了关联。对16只搁浅海豚的胃内容物进行检查发现，它们的食物完全由鱼类(多于或等于15种)组成，其中大部分与海草有不同程度的联系。不到或等于21年的观察记录表明，23%的病例通常在浅水(2-3米)水域和海草附近摄食。海豚通常单独或以小群为食，并以非义务的猎物为食。猎物的主要种类是Sonisious，这表明被动监听在检测猎物时可能是重要的。食性观察表明，胃内容物所代表的鱼类种类与猎物栖息地的一致性很高，这表明胃内容物分析是研究海豚猎物和食性模式的合理途径。海草草甸是萨拉索塔湾地区海豚的重要栖息地之一，保护它们对保护这些动物非常重要。
Stomach contents of a resident community of bottlenose dolphins (Tursiops truncatus) from the Sarasota Bay area of the westcentral coast of Florida were studied to examine potential factors leading to patterns of habitat use. Composition and size of prey were analyzed and correlated with feeding behavior of individual dolphins of known histories. Examination of stomach contents of 16 stranded dolphins revealed a diet composed exclusively of fish (greater than or equal to 15 species), most of which were associated with seagrasses in varying degrees. Observational records for less than or equal to 21 years showed that feeding typically occurred in shallow (2-3 m) waters and in the vicinity of seagrasses in 23% of cases. Dolphins usually fed alone or in small groups and on non-obligate schooling prey. The main species of prey were soniferous, an indication that passive listening may be important in detection of prey. The close agreement between species of fishes represented in stomach contents and habitat of prey, as indicated by observations of feeding, suggests that analysis of stomach contents is a reasonable approach for studying prey and feeding patterns of dolphins. Meadows of seagrass are one of the habitats of importance to dolphins in the Sarasota Bay area, and their protection is important for conservation of these animals.