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首页> 外文期刊>Herpetologica >ANALYSIS OF PATTERNS OF AGGREGATION UNDER COVER OBJECTS IN AN ASSEMBLAGE OF SIX SPECIES OF SNAKES
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ANALYSIS OF PATTERNS OF AGGREGATION UNDER COVER OBJECTS IN AN ASSEMBLAGE OF SIX SPECIES OF SNAKES

机译：六种蛇组合时在覆盖物作用下的聚集规律分析

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摘要

Use of cover objects for hiding is a well developed behavior in reptiles, including snakes. Snakes sometimes aggregate under cover objects, which may reflect a shortage of suitable cover, very favorable conditions, social attraction, or simply chance. However, most studies of aggregation behavior have been conducted in the laboratory. In this study, I investigated the tendency of six species of snakes to aggregate under rocks in the field in southern Ontario, Canada. Most snakes under rocks were by themselves, but I found single- and mixed-species aggregations of up to four snakes. Although all species were involved in mixed-species aggregations, I did not find all possible combinations of species; no aggregations involved more than two species. Goodness-of-fit tests suggested that the pattern of aggregation sizes was well described by a geometric distribution, implying a nonrandom tendency toward aggregation. Nonetheless, because data were pooled over time, random occurrence of aggregation cannot be ruled out. However, aggregations were clearly nonrandom in another sense: individuals in aggregations tended to be the same size, perhaps indicating size-specific choice of rock and/or fellow snake. Careful field experimentation will be required to test these ideas.
机译：在爬行动物（包括蛇）中，使用掩盖对象进行隐藏是一种非常发达的行为。蛇有时会在遮盖物下聚集，这可能反映出适当遮盖物的缺乏，非常有利的条件，社交吸引力或偶然的机会。但是，大多数聚集行为的研究都是在实验室中进行的。在这项研究中，我调查了加拿大安大略省南部田野中六种蛇在岩石下聚集的趋势。大多数在岩石下的蛇都是靠它们自己，但我发现最多有四条蛇的单一物种和混合物种聚集。尽管所有物种都参与了混合物种聚集，但我没有找到所有可能的物种组合。没有聚集涉及两个以上的物种。拟合优度测试表明，聚集体大小的模式可以通过几何分布很好地描述，这暗示着聚集的非随机趋势。但是，由于数据是随时间合并的，因此不能排除随机发生聚合的情况。但是，从另一种意义上来说，聚集显然是非随机的：聚集中的个体往往具有相同的大小，这可能表明岩石和/或其他蛇的大小特定选择。需要仔细的现场试验来检验这些想法。

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