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Density and pond habitat affect survival and growth rates in larval Columbia spotted frogs (Rana luteiventris)

机译:密度和池塘栖息地影响幼虫哥伦比亚斑点青蛙的生存和增长率(Rana Luteiventris)

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摘要

Juvenile survival and growth are critical determinants of evolutionary fitness in most organisms. However, specific effects of population density and habitat quality on survival and growth of larvae vary widely among amphibian species. The Columbia spotted frog (Rana luteiventris), like many amphibians in the arid western United States, is a species of conservation concern, especially in the southern part of its range. To determine how density and habitat affect vital rates of Columbia spotted frog during the larval period, we performed a controlled experiment. Larval growth and survival in the Columbia spotted frog are determined by density of conspecifics and pond habitat. Density of conspecifics is the most important determinant of larval growth, and pond habitat type is the most important determinant of larval survival. Recommendations for repatriation efforts include starting populations with intermediate densities of larvae to optimize the size-versus-number trade-off.
机译:少年存活和生长是大多数生物中进化健康的关键决定因素。 然而,种群密度和栖息地质量对幼虫生存和生长的特异性效果在两栖物种中广泛变化。 哥伦比亚发现青蛙(Rana Luteiventris),如美洲美国的许多两栖动物,是一个保护令人担忧的物种,特别是在其范围的南部。 为了确定如何在幼虫期间如何影响哥伦比亚斑点青蛙的重要率,我们进行了受控实验。 哥伦比亚斑点斑点幼虫的幼虫生长和生存率由Conspecifics和Pond栖息地的密度决定。 消费密度是幼虫生长最重要的决定因素,池塘栖息地是幼虫生存的最重要的决定因素。 遣返努力的建议包括与幼虫中间密度的起始群体,以优化规模 - 与数量的权衡。

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