PREDATOR AVOIDANCE BY THE FRESH-WATER SNAIL PHYSELLA-VIRGATA IN RESPONSE TO THE CRAYFISH PROCAMBARUS-SIMULANS

被引：109

作者：

ALEXANDER, JE ^{[1
]}

COVICH, AP ^{[1
]}

机构：

[1] UNIV OKLAHOMA,DEPT ZOOL,NORMAN,OK 73019

来源：

OECOLOGIA | 1991年 / 87卷 / 03期

关键词：

PREDATOR AVOIDANCE; SNAILS; CRAYFISH; PREDATION; PREDATOR-PREY INTERACTIONS;

D O I：

10.1007/BF00634603

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

We examined predator avoidance behavior of the freshwater snail Physella (= Physa) virgata in response to the crayfish Procambarus simulans. In both laboratory and field enclosure experiments snails crawled above the waterline for 2 h or longer, then returned to the water. Physella virgata react to chemical signals given off by crayfish actively foraging on conspecific snails; they do not react to inactive crayfish. Low dissolved oxygen, crowding, and disturbance of the sediments did not elicit "crawlout" behavior. Crawling above the waterline, by reducing the probability of encounter between vulnerable, thin-shelled snails and crayfish, is an adaptive response to predation.

引用

页码：435 / 442

页数：8

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