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Roles of Rice Paddies and Neighboring Biotopes with Different Hydroperiods in Providing Habitat for an Endangered Pond Frog Population in Japan
Wetlands ( IF 2 ) Pub Date : 2024-01-25 , DOI: 10.1007/s13157-024-01781-z
Risa S. Naito , Masaru Sakai , Yosihiro Natuhara , Yukihiro Morimoto

The Nagoya Daruma pond frog Pelophylax porosus brevipodus (formerly Rana porosa brevipoda) requires a wet environment year-round, but such habitats have generally been lost due to improved rice paddy drainage such that the frog populations have been decreasing. There have been attempts to create permanent pools in rice paddy areas to help the populations recover, but the basic life history patterns and population dynamics in both environments have not been well studied. We captured frogs in rice paddies and adjacent biotopes. Using capture–mark–recapture data with 816 marked individuals, we compared frog demographics and population structure using a Jolly–Seber POPAN model. Constructed biotopes had conditions favoring long-term persistence. For example, biotopes had larger frogs of both sexes than rice paddies. The ratio of juveniles to adults was lower in biotopes than rice paddies. By contrast, rice paddies were an important habitat for breeding and producing new frogs. The two habitats complemented each other to support the local frog population. Because P. p. brevipodus is now exclusively distributed in rice paddy areas, the creation of permanent pools is a feasible way to improve habitat quality, especially in modernized rice paddy areas with few permanent lentic habitats.



中文翻译:

稻田和邻近不同水文周期的生境在为日本濒临灭绝的池塘蛙种群提供栖息地方面的作用

名古屋达摩池蛙Pelophylax porosus brevipodus(以前称为Rana porosa brevipoda)需要全年湿润的环境,但由于稻田排水改善,这种栖息地普遍消失,青蛙数量不断减少。人们曾尝试在稻田地区建立永久性水池来帮助种群恢复,但两种环境中的基本生活史模式和种群动态尚未得到充分研究。我们在稻田和邻近的生境中捕获了青蛙。利用 816 个标记个体的捕获-标记-再捕获数据,我们使用 Jolly-Seber POPAN 模型比较了青蛙的人口统计数据和种群结构。构建的群落生境具有有利于长期持续存在的条件。例如,群落生境中的两性青蛙都比稻田中的大。群落生境中幼虫与成虫的比例低于稻田。相比之下,稻田是繁殖和生产新青蛙的重要栖息地。这两个栖息地相辅相成,支持了当地的青蛙种群。因为P . p短足鳅目前仅分布于稻田,建立永久性水池是改善栖息地质量的可行方法,特别是在永久水生栖息地很少的现代化稻田地区。

更新日期:2024-01-25
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