科创中国

Time to feed: How diet, competition, and experience may influence feeding behaviour and cannibalism in wood frog tadpoles Lithobates sylvaticus

原文链接：万方

• 作者：

  Dale M. JEFFERSON,Keith A. HOBSON,Douglas P. CHIVERS

• 摘要：

  Wood frog Lithobates sylvaticus tadpoles 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 can- nibalistic 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 comrneal). 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 re- sponse 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 [Current Zoology 60 (5): 571-580, 2014 ].

• 关键词：

  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

• 作者单位：

  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

• 来源期刊：

  动物学报(英文版)

• 年，卷(期)：

  2014005