Evaluating artificial shelter arrays as a minimally invasive monitoring tool for the hellbender Cryptobranchus alleganiensis
Evaluating artificial shelter arrays as a minimally invasive monitoring tool for the hellbender Cryptobranchus alleganiensis
复制标题
评估人工庇护所阵列作为一种微创监测工具对阿勒加隐鳃金龟的影响
DOI：
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
W. Hopkins
中科院分区：
文献类型：
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作者：
C. Jachowski;Beth E. Ross;W. Hopkins
在美国东部，隐鳃鲨是濒危的两栖动物。岩石提升被广泛用于监测hellbenders，但可以严重干扰栖息地。我们问人工避难所占用率（阵列中被占用避难所的比例）是否会作为一个代理的hellbender丰度，从而作为一个可行的替代岩石升降。我们假设，庇护所占用空间会有所不同，在响应hellbender密度，自然庇护所密度，或两者兼而有之，并会随hellbender的季节性活动模式和时间，因为庇护所部署时间。我们建立了庇护所阵列（n = 30个庇护所）在6流到达，每月监测他们长达2年。我们使用贝叶斯混合逻辑回归和模型排序标准来评估对有关避难所占用驱动因素的假设的支持。在所有地区，收容所的入住率在每年的6月至8月最高，第二年的入住率高于第一年。我们最好的支持模型表明，在一个河段的巨石和基岩（以下，自然住房）的程度介导的hellbender丰度和住房占用之间的关系。更明确地说，当天然庇护所覆盖的河段<20%时，庇护所占用率与丰度呈正相关，但当天然庇护所更丰富时，庇护所占用率与丰度无关。虽然住房占用不应被用来推断在hellbender相对丰度的变化时，基板组成各不相同的河段，我们表明，人工庇护所可以作为有价值的监测工具，当达到一定的标准，虽然定期的住房维护是至关重要的。
Hellbenders Cryptobranchus alleganiensis are critically imperiled amphibians throughout the eastern USA. Rock-lifting is widely used to monitor hellbenders but can severely disturb habitat. We asked whether artificial shelter occupancy (the proportion of occupied shelters in an array) would function as a proxy for hellbender abundance and thereby serve as a viable alternative to rock-lifting. We hypothesized that shelter occupancy would vary spatially in response to hellbender density, natural shelter density, or both, and would vary temporally with hellbender seasonal activity patterns and time since shelter deployment. We established shelter arrays (n = 30 shelters each) in 6 stream reaches and monitored them monthly for up to 2 yr. We used Bayesian mixed logistic regression and model ranking criteria to assess support for hypotheses concerning drivers of shelter occupancy. In all reaches, shelter occupancy was highest from June–August each year and was higher in Year 2 relative to Year 1. Our best-supported model indicated that the extent of boulder and bedrock (hereafter, natural shelter) in a reach mediated the relationship between hellbender abundance and shelter occupancy. More explicitly, shelter occupancy was positively correlated with abundance when natural shelter covered <20% of a reach, but uncorrelated with abundance when natural shelter was more abundant. While shelter occupancy should not be used to infer variation in hellbender relative abundance when substrate composition varies among reaches, we showed that artificial shelters can function as valuable monitoring tools when reaches meet certain criteria, though regular shelter maintenance is critical.
DOI：
10.1152/ajpregu.00752.2007
发表时间：
2008-02
期刊：
American journal of physiology. Regulatory, integrative and comparative physiology
影响因子：
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作者：
L. Romero;Cecile J Meister;Nicole E. Cyr;G. Kenagy;J. Wingfield;Romero Lm;Meister Cj;Cyr Ne;Kenagy Gj;J. Wingfield;Sea;L. Romero
通讯作者：
L. Romero;Cecile J Meister;Nicole E. Cyr;G. Kenagy;J. Wingfield;Romero Lm;Meister Cj;Cyr Ne;Kenagy Gj;J. Wingfield;Sea;L. Romero