Home range of three turtle species in Central Yucatan. A comparative study

IF 3.4 Q1 Agricultural and Biological Sciences
Ivette Enríquez-Mercado, Taggert G. Butterfield, Rafael Aguilar-Romero, Rodrigo Macip-Ríos
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引用次数: 0

Abstract

Home range is a fundamental characteristic of an animal natural history. The study of home range provides information on the sites where organisms forage for food, find shelter, or locate mates. Home range size and shape can change throughout the lifespan of an organism, during the year, or across seasons, driven by resource availability and the basic needs for each organism. For freshwater and semi-aquatic turtles, home range is greatly affected by water availability, humidity, and temperature throughout the year, nevertheless demographic factors such age and sex are also important determinants of home range size. In this study we estimated home range and dispersal movements for Kinosternon creaseri, Terrapene yucatana, and Rhinoclemmys areolata in a semi-tropical dry forest in central Yucatán. For a two-year period, turtles were surveyed using hoop traps and visual encounters. Twenty-one individuals (5–8 per species) were equipped with radio transmitters to track them across the landscape. Distances between relocations and home range were compared across species seasons, sex, and interactions of these variables. Monthly average movements were positively correlated with rain in the three species studied. Home range of R. areolata was larger than those of K. creaseri and T. yucatana. Home range of the three studied species were larger during the wet season. Home range overlap index within same species individuals was higher during the rainy than dry season, but overall overlap is low between and within species. Comparative studies of home range in sympatric organisms can shed light on how organisms partition resources to co-exist, and identify the habitat needs for each species. We compared the home range and movement of three sympatric turtle species on the Yucatan Peninsula, Mexico, a habitat characterized as semideciduous dry forest. Home range and movements differ among species and seasons. Turtles move larges distances and have larger home ranges during the rainy season, while their home range shrank during the dry season, when some species estivate, while others occupy permanent water bodies. Our results show that home range is related to season and water availability for the species studied, which used different of microhabitats, with Kinosternon creaseri used sartenejas and rock shelters, while Rhinoclemmys areolate used wooded debris and leaf litter microhabitats, finally, Terrapene yucatana was observed in rocky and woody debris microhabitats.

Abstract Image

尤卡坦半岛中部三种海龟的家园范围。比较研究
家园范围是动物自然史的一个基本特征。对家域的研究提供了有关生物觅食、寻找栖息地或交配地点的信息。受资源可用性和每种生物基本需求的影响,家园范围的大小和形状会在生物的整个生命周期、一年中或不同季节发生变化。对于淡水和半水栖龟类来说,家园范围在很大程度上受全年水源、湿度和温度的影响,然而年龄和性别等人口因素也是决定家园范围大小的重要因素。在这项研究中,我们估算了尤卡坦半岛中部半热带干旱森林中金龟子(Kinosternon creaseri)、尤卡坦海龟(Terrapene yucatana)和犀龟(Rhinoclemmys areolata)的家园范围和扩散运动。在为期两年的时间里,我们使用环形诱捕器和目测法对海龟进行了调查。21 只海龟(每个物种 5-8 只)安装了无线电发射器,以便在整个地形中跟踪它们。比较了不同物种在不同季节、不同性别以及这些变量相互作用下的迁移距离和家园范围。在所研究的三个物种中,月平均迁移量与雨量呈正相关。R.areolata的家园范围大于K.creaseri和T.yucatana。所研究的三个物种在雨季的活动范围更大。同种个体的巢区重叠指数雨季高于旱季,但种间和种内的总体重叠率较低。对同域生物的家园范围进行比较研究,可以揭示生物如何分配资源以实现共存,并确定每个物种对生境的需求。我们比较了墨西哥尤卡坦半岛上三种同域海龟的家园范围和移动情况,该栖息地的特点是半落叶干燥森林。不同物种和不同季节的家园范围和移动情况各不相同。在雨季,海龟的移动距离更远,家园范围更大;而在旱季,海龟的家园范围缩小,一些海龟在旱季迁徙,另一些则占据永久性水体。我们的研究结果表明,对所研究的物种而言,家园范围与季节和水的供应有关,这些物种使用不同的微生境,其中 Kinosternon creaseri 使用 sartenejas 和岩石庇护所,而 Rhinoclemmys areolate 使用木屑和落叶微生境,最后,Terrapene yucatana 在岩石和木屑微生境中被观察到。
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来源期刊
BMC Evolutionary Biology
BMC Evolutionary Biology 生物-进化生物学
CiteScore
5.80
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: BMC Evolutionary Biology is an open access, peer-reviewed journal that considers articles on all aspects of molecular and non-molecular evolution of all organisms, as well as phylogenetics and palaeontology.
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