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Population biology, natural history and conservation of two endangered high elevation Neotropical butterflies
Journal of Insect Conservation ( IF 1.9 ) Pub Date : 2020-04-27 , DOI: 10.1007/s10841-020-00242-2
Augusto H. B. Rosa , Danilo B. Ribeiro , André V. L. Freitas

The southeastern Brazilian highlands harbor a high number of endemic and threatened species of animals and plants, including two species of Pampasatyrus butterflies (Satyrinae: Pronophilina). As for many other threatened Brazilian butterflies, there is virtually no biological information available for these butterflies. A mark-recapture study was carried out for two consecutive years (2017 and 2018) to study population parameters, movement, natural history and threats for the two Pampasatyrus species. The results showed that population parameters of both species are similar to those of satyrine butterfly species from temperate regions, including a single flight season, short adult lifespan and a typical pattern of protandry (adult males flying before females). Moreover, adults were shown to have high habitat fidelity, being restricted to natural grassland, and are mostly sedentary. Both studied species are seriously threatened by human-caused impacts, including urban expansion, presence of non-native large grazing animals, uncontrolled tourism and natural and man-made fires. Although none of these impacts have been directly measured, a fire that consumed more than 70% of the study area in the winter of 2017 did not cause the extinction of the populations of both species, as evidenced by population numbers in 2018. The present study contributes important data on the population biology and ecology of these two threatened butterflies, providing information that can be used for future management plans of these species and their habitats.

中文翻译:

两种濒危高海拔新热带蝴蝶的种群生物学、自然历史和保护

巴西东南部高地栖息着大量地方性和受威胁的动植物物种,包括两种 Pampasatyrus 蝴蝶(Satyrinae:Pronophilina)。至于许多其他受威胁的巴西蝴蝶,几乎没有这些蝴蝶的生物学信息。连续两年(2017 年和 2018 年)进行了一项标记重新捕获研究,以研究这两种 Pampasatyrus 物种的种群参数、运动、自然历史和威胁。结果表明,这两个物种的种群参数与温带地区的沙丁蝶物种相似,包括单一的飞行季节、较短的成虫寿命和典型的前突模式(成年雄性先于雌性飞行)。此外,成年人被证明具有较高的栖息地保真度,仅限于天然草原,大多久坐不动。这两个研究物种都受到人为影响的严重威胁,包括城市扩张、非本地大型放牧动物的存在、不受控制的旅游业以及自然和人为火灾。尽管这些影响都没有直接测量过,但 2017 年冬天的一场大火烧毁了研究区域的 70% 以上,并没有导致这两个物种的种群灭绝,正如 2018 年的种群数量所证明的那样。 本研究提供有关这两种受威胁蝴蝶的种群生物学和生态学的重要数据,提供可用于这些物种及其栖息地未来管理计划的信息。包括城市扩张、非本地大型放牧动物的存在、不受控制的旅游业以及自然和人为火灾。尽管这些影响都没有被直接测量过,但 2017 年冬天的一场大火烧毁了研究区域 70% 以上的面积,并没有导致这两个物种的种群灭绝,正如 2018 年的种群数量所证明的那样。 本研究提供有关这两种受威胁蝴蝶的种群生物学和生态学的重要数据,提供可用于这些物种及其栖息地未来管理计划的信息。包括城市扩张、非本地大型放牧动物的存在、不受控制的旅游业以及自然和人为火灾。尽管这些影响都没有被直接测量过,但 2017 年冬天的一场大火烧毁了研究区域 70% 以上的面积,并没有导致这两个物种的种群灭绝,正如 2018 年的种群数量所证明的那样。 本研究提供有关这两种受威胁蝴蝶的种群生物学和生态学的重要数据,提供可用于这些物种及其栖息地未来管理计划的信息。
更新日期:2020-04-27
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