The shape of things to come: linking developmental plasticity to post-metamorphic morphology in anurans
The shape of things to come: linking developmental plasticity to post-metamorphic morphology in anurans
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DOI：
10.1111/j.1420-9101.2010.02016.x
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发表时间：
2010-07-01
影响因子：
2.1
通讯作者：
Warkentin, K. M.
中科院分区：
文献类型：
--
作者：
Gomez-Mestre, I.;Saccoccio, V. L.;Warkentin, K. M.
发展由生长和分化组成，两者可以部分解耦，并受到环境因素不同程度的影响。在两栖动物中，幼虫环境的变化影响发育并导致变质后形状的变化。我们检查了变形后的后果，形态和运动，在生长和发育的改变。本研究将红眼树蛙（Agalychnis callidryas）和非洲爪蛙（Xenopus laevis）这两种在系统发育和生态上距离较远的蛙类蝌蚪在不同温度下进行了饲养，并在恒温条件下进行了不同食物水平的饲养。低温和低食物水平都导致了幼虫期的延长。然而，低温条件下的青蛙腿相对较长，骨化程度低于温暖条件下的青蛙，而低食物条件下的青蛙腿相对较短，骨化程度高于高食物条件下的青蛙。这种异速差异对幼体的运动性能没有影响。我们的研究结果为理解anurans的生长、分化和后变质形态之间的关系提供了基础，并有助于解释先前研究中报道的许多差异。
Development consists of growth and differentiation, which can be partially decoupled and can be affected by environmental factors to different extents. In amphibians, variation in the larval environment influences development and causes changes in post-metamorphic shape. We examined post-metamorphic consequences, both morphological and locomotory, of alterations in growth and development. We reared tadpoles of two phylogenetically and ecologically distant frog species (the red-eyed treefrog Agalychnis callidryas and the African clawed frog Xenopus laevis) under different temperatures with ad libitum food supply and under different food levels at a constant temperature. Low temperature and low food levels both resulted in similarly extended larval periods. However, low temperature yielded relatively long-legged frogs with a lower degree of ossification than warm temperature, whereas low food yielded relatively short-legged frogs with a higher degree of ossification than high food levels. Such allometric differences had no effect on locomotor performance of juveniles. Our results provide a basis for understanding the relationship between growth, differentiation and post-metamorphic shape in anurans and help explain many of the discrepancies reported in previous studies.