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来源类型Article
规范类型其他
DOI10.1098/rspb.2011.1290
Juvenile exposure to predator cues induces a larger egg size in fish.
Segers FHID; Taborsky B
发表日期2012
出处Proceedings of the Royal Society B: Biological Sciences 279 (1731): 1241-1248
出版年2012
语种英语
摘要When females anticipate a hazardous environment for their offspring, they can increase offspring survival by producing larger young. Early environmental experience determines egg size in different animal taxa. We predicted that a higher perceived predation risk by juveniles would cause an increase in the sizes of eggs that they produce as adults. To test this, we exposed juveniles of the mouthbrooding cichlid Eretmodus cyanostictus in a split-brood experiment either to cues of a natural predator or to a control situation. After maturation, females that had been confronted with predators produced heavier eggs, whereas clutch size itself was not affected by the treatment. This effect cannot be explained by a differential female body size because the predator treatment did not influence growth trajectories. The observed increase of egg mass is likely to be adaptive, as heavier eggs gave rise to larger young and in fish, juvenile predation risk drops sharply with increasing body size. This study provides the first evidence that predator cues perceived by females early in life positively affect egg mass, suggesting that these cues allow her to predict the predation risk for her offspring.
主题Evolution and Ecology (EEP)
关键词Early environment Egg size Fish Maternal effects Phenotypic plasticity Predation
URLhttp://pure.iiasa.ac.at/id/eprint/9983/
来源智库International Institute for Applied Systems Analysis (Austria)
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资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/129564
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GB/T 7714
Segers FHID,Taborsky B. Juvenile exposure to predator cues induces a larger egg size in fish.. 2012.
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