Use of linear features by the common vampire bat (Desmodus rotundus) in a tropical cattle-ranching landscape
Use of linear features by the common vampire bat (Desmodus rotundus) in a tropical cattle-ranching landscape
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DOI：
10.12933/therya-19-890
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发表时间：
2019-01-01
期刊：
影响因子：
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通讯作者：
Sánchez-Gómez, Wendy S.
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文献类型：
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作者：
Ávila-Flores, Rafael;Bolaina-Badal, Ana Lucía;Sánchez-Gómez, Wendy S.
线性景观特征被许多种类的食虫蝙蝠用作飞行路线和觅食区，以及提供对环境因素和捕食的保护。然而，很少有人知道的作用，这些景观功能发挥非食虫物种。在这项研究中，我们评估了使用线性功能的常见吸血蝙蝠（Desmodus rotundus）在一个养牛场的景观在塔巴斯科州，墨西哥。我们在2014年选择了24个采样点，在2016年至2017年选择了24个独立的采样点，所有采样点都邻近三种类型的线性景观特征：森林边缘，活栅栏和溪流。我们在2014年2月至4月期间对每个站点进行了两个非连续夜晚的监测，并在2016年2月至2017年6月期间每两个月进行一次监测。我们从边缘垂直于线性特征放置了24米（2014年）或12米（2016年至2017年）的雾网。我们记录了每一个被捕获的个体的高度和离边缘的距离。我们一共抓了50个D。2014年为圆形个体，2016年至2017年为58人。2014年数据的平均飞行高度为77厘米，2016年至2017年为69厘米。根据我们的研究结果，最常用的线性特征是森林边缘，其次是活栅栏和溪流。总体而言，2014年捕获的52%和2016年至2017年捕获的62%发生在距离边缘的前2米处，捕获数量随着距离的增加而逐渐减少。本研究提供了D.在主要是开放的养牛场景观中的圆形。
Linear landscape features are used by many species of insectivorous bats as flight routes and foraging zones, as well as for providing protection against environmental factors and predation. However, very little is known about the role that these landscape features play for non-insectivorous species. In this study, we evaluated the use of linear features by the common vampire bat (Desmodus rotundus) in a cattle-ranching landscape in the state of Tabasco, Mexico. We selected 24 sampling sites in 2014 and 24 independent sites in 2016 to 2017, all adjacent to three types of linear landscape features: forest edges, live fences and streams . We monitored each site for two non-consecutive nights between February and April 2014, and every two months from February 2016 to June 2017. We placed 24 m (2014) or 12 m (2016 to 2017) of mist nets perpendicular to the linear feature from its edge. We recorded the height and distance from the edge for each individual captured. In total we captured 50 D. rotundus individuals in 2014 and 58 in 2016 to 2017. The average flight height was 77 cm for the 2014 data and 69 cm for 2016 to 2017. According to our results, the most used linear features were forest edges, followed by live fences and streams. Overall, 52 % of the 2014 captures and 62% of the 2016 to 2017 ones occurred in the first 2 m from the edge, with the number of captures gradually decreasing with increasing distance. This study provides information on the commuting patterns of D. rotundus in predominantly open cattle-ranching landscapes.