Altered behavior of parasitized killifish increases susceptibility to predation by bird final hosts

被引:427
作者
Lafferty, KD [1 ]
Morris, AK [1 ]
机构
[1] UNIV CALIF SANTA BARBARA, DEPT SCI BIOL, SANTA BARBARA, CA 93106 USA
关键词
behavior-modification hypothesis; bird predation; differential predation; effects of parasites on host behavior; Euhaplorchis californiensis; field experiment; Fundulus; killifish; metacercariae; parasites; trematode;
D O I
10.2307/2265536
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Parasites that are transmitted from prey to predator are often associated with altered prey behavior. Although many concur that behavior modification is a parasite strategy that facilitates transmission by making parasitized prey easier for predators to capture, there is little evidence from field experiments. We observed that conspicuous behaviors exhibited by killifish (Fundulus parvipinnis) were associated with parasitism by larval trematodes. A field experiment indicated that parasitized fish were substantially more susceptible to predation by final host birds. These results support the behavior-modification hypothesis and emphasize the importance of parasites for predator-prey interactions.
引用
收藏
页码:1390 / 1397
页数:8
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