Size-sex Variation in Survival Rates and Abundance of Pig Frogs, Rana grylio, in Northern Florida Wetlands
Size-sex Variation in Survival Rates and Abundance of Pig Frogs, Rana grylio, in Northern Florida Wetlands
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DOI：
10.2307/1565206
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发表时间：
1998-12
影响因子：
0.8
通讯作者：
K. V. Wood;J. Nichols;H. F. Percival;J. Hines
中科院分区：
文献类型：
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作者：
K. V. Wood;J. Nichols;H. F. Percival;J. Hines
在1991-1993年期间，我们在佛罗里达州中北部的七个研究地点对猪蛙（Rana grylio）进行了捕获-再捕获研究。所得到的数据被用来检验关于不同大小性别的猪蛙存活率变化的假设。我们为结果数据开发了多状态捕获-再捕获模型，并使用它们来估计存活率和青蛙丰度。测试提供了强有力的证据，证明不同体型性别之间的生存差异，成年雌性的生存概率最高。成年雄蛙和幼年蛙的存活率较低，但两者相似。在大多数取样地点，成年雌虫比成年雄虫多。我们一般推荐概率捕获-再捕获模型，特别是多状态模型，用于两栖动物种群人口参数的稳健估计。
During 1991-1993, we conducted capture-recapture studies on pig frogs, Rana grylio, in seven study locations in northcentral Florida. Resulting data were used to test hypotheses about variation in survival probability over different size-sex classes of pig frogs. We developed multistate capture-recapture models for the resulting data and used them to estimate survival rates and frog abundance. Tests provided strong evidence of survival differences among size-sex classes, with adult females showing the highest survival probabilities. Adult males and juvenile frogs had lower survival rates that were similar to each other. Adult females were more abundant than adult males in most locations at most sampling occasions. We recommend probabilistic capture-recapture models in general, and multistate models in particular, for robust estimation of demographic parameters in amphibian populations.