Occupancy dynamics of breeding crawfish frogs in southeastern Indiana
Occupancy dynamics of breeding crawfish frogs in southeastern Indiana
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印第安纳州东南部养殖小龙虾蛙的占用动态
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发表时间：
2012
期刊：
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通讯作者：
Daryl R. Karns
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作者：
Perry J. Williams;J. Robb;Daryl R. Karns
2010年3月至2011年3月，在美国东南部印第安纳州的大橡树国家野生动物保护区，随机选取45个草地，研究了养殖小龙虾蛙（Lithobates areolatus）在208 km 2草地上的占有动态。我们开发了一套假设解释占用，检测和环境协变量之间的关系。我们适合我们的假设，使用多季入住模型，并比较它们的信息理论，模型选择框架。我们的顶级模型表明，探测概率与时间、温度和调查前24小时的降雨量呈正线性关系，与日期呈二次曲线关系，在3月19日达到峰值。我们的顶级模型支持我们的假设，即占用概率与草地大小呈正相关;较大的草地更有可能被小龙虾青蛙占用。根据我们的研究结果，我们建议管理人员保护繁殖地附近的大片草地。我们建议在印第安纳州东南部的小龙虾蛙繁殖调查在3月中下旬进行，每个呼叫点调查15分钟。我们提供了一个模型，以提高检测概率估计的呼叫调查，目标呼叫小龙虾青蛙的精度。2012年出版。本条目属于美国政府作品，在美国属于公有领域。
We studied the occupancy dynamics of breeding crawfish frogs (Lithobates areolatus )a t 45 randomly selected grasslands across 208 km 2 at Big Oaks National Wildlife Refuge, in southeastern Indiana, USA, during March 2010 and 2011. We developed a suite of hypotheses explaining the relationship between occupancy, detection, and environmental covariates. We fit our hypotheses using multiseason occupancy models, and compared them in an information-theoretic, model-selection framework. Our top model suggested that the detection probability had a positive, linear relationship with time, temperature, and the amount of rain 24 hours before the survey, and had a quadratic relationship with date, which peaked on 19 March. Our top model supported our hypothesis that occupancy probability was positively correlated with grassland size; larger grasslands were more likely to be occupied by crawfish frogs. Based on our results, we recommend that managers conserve large tracts of grasslands near breeding sites. We recommend that in southeastern Indiana crawfish frog-breeding surveys be conducted in mid- to late-March, and that each call point be surveyed for 15 minutes. We provide a model to increase the precision of detection probability estimates for call surveys that target calling crawfish frogs. Published 2012. This article is a U.S. Government work and is in the public domain in the USA.