Time to feed： How diet, competition, and experience may influence feeding behaviour and cannibalism in wood frog tadpoles Lithobates sylvaticus
Time to feed： How diet, competition, and experience may influence feeding behaviour and cannibalism in wood frog tadpoles Lithobates sylvaticus作者机构：Department of Biology University of Saskatchewan 112 Science PI. Saskatoon SK Canada S7N 5E2 Environment Canada 11 Innovation Blvd. Saskatoon SK Canada S7N 3H5 Keith.Hobson@ec.gc.ca Department of Biology University of Saskatchewan 112 Science PI. Saskatoon SK Canada S7N 5E2 Doug.Chivers@usask.ca
出 版 物：《Current Zoology》 (动物学报（英文版）)
年 卷 期：2014年第60卷第5期
页 面：571-580页
核心收录：
学科分类：0710[理学-生物学] 090801[农学-水产养殖] 12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0908[农学-水产] 07[理学] 0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 070105[理学-运筹学与控制论] 0701[理学-数学]
基 金：approved by the University of Saskatchewan Animal Ethics Committee
主 题：竞争对手 自相残杀 启动时间 攻击行为 可能影响 蝌蚪 喂养 林蛙
摘 要：Wood frogLithobates sylvaticustadpoles develop in temporary wetlands where high population densities can force tadpoles into aggregations that intensify competition and can lead to cannibalism. However, chemical alarm cues released from injured conspecifics could also dissuade cannibalism. The purpose of this study was to test mechanisms that may influence cannibalistic behaviour. We tested whether the tendency of tadpoles to consume conspecifics would increase with the presence of competition and/or cues of profitable diets. Tadpoles placed in 1L experimental containers were tested for feeding initiation times of multiple diets, including conspecific tissues and conspecific tissues combined with chemical cues from the alternative diets (brine shrimp and cornmeal). Tadpoles were tested in the presence and absence of a competitor, and at multiple times over the course of the study. Tadpoles exhibited an altered response to diets over time; however the presence of a competitor reduced response times to all diets including conspecific tissues. Similarly, the presence of specific diets also reduced the response time of tadpoles to conspecific tissues. These results suggest competition among feeding tadpoles could result in aggressive behaviour leading to indiscriminate predation and cannibalism.
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