The feeding behaviour of starfish on Essex oyster beds
The feeding behaviour of starfish on Essex oyster beds
复制标题
埃塞克斯牡蛎床上海星的摄食行为
DOI：
10.1017/s0025315400027685
复制
发表时间：
1955
影响因子：
1.2
通讯作者：
D. Hancock
中科院分区：
文献类型：
--
作者：
D. Hancock
总结实验室和现场观察的食物和喂养的海星在埃塞克斯的河流，特别是在克劳奇河的牡蛎床作为捕食者的角色。红海星被发现最有可能与大量的Crepidula有关，Crepidula是牡蛎最严重的竞争对手。实验室的实验表明，虽然海星偶尔吃生蚝和成年牡蛎，但它的大部分食物是由牡蛎的竞争对手组成的。较小的Asterias吃大量的藤壶，偶尔会吐出牡蛎和Crepidula。较大的偶尔吃牡蛎和牡蛎吐出，但几乎总是表现出对贻贝的偏好，如果没有这些，Crepidula，有时甚至是Urosalpinx。本文对海星（Asterias）和绒毛太阳黑子（Solaster papposus）的摄食和分布方式、摄食率以及石蟹Hyas araneus的摄食行为作了一些观察。由此得出的结论是，Asterias并不像以前想象的那样是牡蛎的严重敌人，在某些条件下，它的存在可能有利于牡蛎养殖。
SUMMARY Laboratory and field observations were made on the food and feeding of the starfish in relation to its role as a predator on oyster beds in the rivers of Essex, particularly in the river Crouch. Asterias rubens was found most likely to be associated with large numbers of Crepidula, the most serious competitor of the oyster. Laboratory experiments showed that although Asterias occasionally ate spat and adult oysters, the greater part of its food was made up of organisms which are competitors of the oyster. The smaller sizes of Asterias ate large numbers of barnacles, with occasional spat of oysters and Crepidula. The larger occasionally ate oysters and oyster spat, but almost always exhibited a preference for mussels and, in the absence of these, for Crepidula, and sometimes even for Urosalpinx. Some observations were made on the method and rate of feeding and distribution of Asterias and Solaster papposus, and certain aspects of the feeding behaviour of the stone crab, Hyas araneus. It was concluded that Asterias is not such a serious enemy of the oyster as was previously supposed, and that under certain conditions, its presence may be beneficial to oyster culture.