Delayed effects of larval predation risk and food quality on anuran juvenile performance

被引:41
作者
Nicieza, A. G. [1 ]
Alvarez, D. [1 ]
Atienza, E. M. S. [1 ]
机构
[1] Univ Oviedo, Dept Biol Organ & Sistemas, Unidad Ecol, E-33006 Oviedo, Spain
关键词
developmental stress; diet quality; Discoglossus galganoi; energetic constraint; fluctuating asymmetry; ontogenetic trade-off; predation risk;
D O I
10.1111/j.1420-9101.2006.01100.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Metamorphosis can disrupt the correlation structure between juvenile and adult traits, thus allowing relatively independent evolution in contrasting environments. We used a multiple experimental approach to investigate how diet quality and larval predation risk affected the rates of growth and development in painted frogs (Discoglossus galganoi), and how these changes influence post-metamorphic performance. A high-energy diet entailed growth advantages only if predation risk did not constrain energy acquisition, whereas diet quality affected primarily the extension of the larval period. Predation risk influenced juvenile shape, most likely via the effects on growth and differentiation rates. Juvenile frogs emerging from predator environments had shorter legs and longer bodies than those from the nonpredator tanks. However, these morphological changes did not translate into differences in relative jumping performance. Neither size-adjusted lipid storage nor fluctuating asymmetry was significantly influenced by food quality or predation risk. Our data suggest that the post-metamorphic costs of predator avoidance during the larval phase are mostly a consequence of small size at metamorphosis.
引用
收藏
页码:1092 / 1103
页数:12
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