Comparison of the diets of sympatric dugongs and green turtles on the Orman Reefs, Torres Strait, Australia
Comparison of the diets of sympatric dugongs and green turtles on the Orman Reefs, Torres Strait, Australia
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DOI：
10.1071/wr04015
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发表时间：
2005-01-01
影响因子：
1.9
通讯作者：
Lawler, IR
中科院分区：
文献类型：
--
作者：
André, J;Gyuris, E;Lawler, IR
本研究调查的饮食儒艮（儒艮，Dugongidae）和绿色海龟（Chelonia mydas，Cheloniidae）的奥尔曼礁在托雷斯海峡，澳大利亚和巴布亚新几内亚之间，其中大量的这些动物共域生活。对在当地渔场捕获的儒艮和绿色海龟的胃内容物进行了检查。儒艮专门以海草为食（主要是Thalassia hemprichii，Cymopera spp.和异叶丁香），而海龟则食用这两种海草（尤其是T. hemprichii和Enhalusacoroides）和藻类（主要是沙菜属，凹顶藻属和蕨藻属（Caulerpa spp.）。两种草食动物在资源利用上除海草T外没有重叠。hemprichii，这是丰富的饲养区。这两个物种似乎都有选择性地进食，而不仅仅是消耗最容易获得的食物。这些结果提示儒艮和绿色海龟之间的食物资源分配，但完整的解释需要更详细的，同时，食物资源和动物的运动研究。
This study investigated the diet of dugongs ( Dugong dugon, Dugongidae) and green turtles ( Chelonia mydas, Cheloniidae) on the Orman Reefs in Torres Strait, between Australia and Papua New Guinea, where large numbers of these animals live sympatrically. The stomach contents of dugongs and green turtles caught in an indigenous fishery were examined. Dugongs fed exclusively on seagrasses ( mainly Thalassia hemprichii, Cymodocea spp. and Syringodium isoetifolium) whereas turtles consumed both seagrasses ( especially T. hemprichii and Enhalus acoroides) and algae ( mainly Hypnea spp., Laurencia spp. and Caulerpa spp.). The two herbivores showed no overlap in resource use except for the seagrass T. hemprichii, which was abundant in the feeding area. Both species appeared to feed selectively and did not just consume the most available food items. These results are suggestive of partitioning of food resources between dugongs and green turtles but a full explanation requires more detailed, and concurrent, study of the food resources and the animals' movements.