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首页> 外文OA文献 >Ecologia comportamental de tropidurus Hispidus e Tropidurus Semitaeniatus (Squamata, Tropiduridae) em Simpatria, em área de caatinga do nordeste do Brasil.
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Ecologia comportamental de tropidurus Hispidus e Tropidurus Semitaeniatus (Squamata, Tropiduridae) em Simpatria, em área de caatinga do nordeste do Brasil.

机译：在座谈会上在巴西北部森林地区举办的生态学与热带动物组（Squamata，Tropiduridae）合作。

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摘要

This study evaluated the spatial, time and alimentary niches of Tropidurus hispidus and Tropidurus semitaeniatus in sympatry in a caatinga of Rio Grande do Norte, Brazil, as well as their foraging and termoregulatory behaviors, the activity body temperature and their reproductive and fat body cycles. Monthly excursions, from October 2006 to May 2008, wereconducted at the Ecological Station of the Seridó (ESEC Seridó), Serra Negra do Norte municipality, using specific methodology for investigation of the aforementioned objectives.The two species presented similarities in space niche use, mainly in rocky habitat, however they differed in vertical microhabitat use with T. hispidus using a larger vertical microhabitat range. In the dry season the time of activity of both species was bimodal. In the wet season T. semitaeniatus showed a unimodal activity period, while T. hispidus maintained an bimodal activity period. In terms of importance in the diet, to both species, Hymenoptera/Formicidae and Isoptera predominated during the dry season. In the wet season, although Hymenoptera/Formicidae had larger importance among the prey items, lizards opportunistically predated on Lepidoptera larvae, Coleoptera larvae/adults and Orthoptera nymphs/adults. The foraging intensity revealed differences between the species, mainly in the wet season, when T. semitaeniatus was more active than T. hispidus. The mean activity body temperature of T. semitaeniatus was significantly higher than that of T. hispidus. The thermoregulatory behavior showed that during the dry season T. hispidus and T. semitaeniatus spent more time in shade or under filtered sun. In the wet season, T. hispidus did not show differences in the amount of time spent among the light exposure locations, however T. semitaeniatus spent most of their time exposed to direct sun or filtered sun. The reproductive cicle of T. hispidus and T. semitaeniatus occurred from the middle of the dry season to the beginning of the wet season. In both species, female reproductive activity was influenced by precipitation, whereas males exhibited spermatozoa in their testes throughout the year, and their reproductive activity was not related with any of the climatic variables analysed. In the two species, the fat storage varied inversely with reproductive activity, and there was no difference in fat body mass between females and males. We concluded that the segregation between T. hispidus and T. semitaeniatus in this caatinga area occurs in vertical space use, in the largest vagility of T. hispidus in microhabitat use and larger range size of their alimentary xviii items. Additionally, significant seasonal differences in relation to the activity period, body temperature, and foraging and termoregulatory behaviors between these two Tropidurus species facilitate their coexistence.
机译：这项研究评估了巴西北里奥格兰德州的一个猎豹中的拟南芥和拟南半乳的空间，时间和营养优势，以及它们的觅食和调节行为，活动体温以及它们的生殖和脂肪循环。从2006年10月至2008年5月，每月一次的旅行是在北部塞拉内格拉多市塞里多生态站（ESECSeridó）进行的，使用了专门的方法研究上述目标。这两个物种在空间生态位的利用上有相似之处，主要是在多岩石的栖息地中，然而，它们在较大的垂直微生境范围内的垂直微生境与T. hispidus的使用不同。在干旱季节，两种物种的活动时间都是双峰的。在雨季，半边形T. semitaeniatus表现出单峰活动期，而T. hispidus则保持双峰活动期。就饮食的重要性而言，在旱季，膜翅目/甲虫和等翅目对这两个物种都占主导地位。在雨季，尽管膜翅目/ Form科在猎物中更为重要，但蜥蜴的机会性先于鳞翅目幼虫，鞘翅目幼虫/成虫和直翅目若虫/成虫。觅食强度揭示了两个物种之间的差异，主要是在湿季，那时半隐花线虫比棉铃虫更活跃。 T. semitaeniatus的平均活动体温明显高于T. hispidus。体温调节行为表明，在干旱季节，T。hispidus和T. semitaeniatus在阴凉处或在阳光直射下花费更多的时间。在雨季，T。hispidus的光照时间没有显示出差异，但是，Semitaeniatus大部分时间都暴露在直射阳光或滤过阳光下。 T. hispidus和T. semitaeniatus的生殖小核从干旱季节的中部到潮湿季节的开始。在这两个物种中，雌性生殖活动都受降水影响，而雄性全年则在其睾丸中表现出精子，并且其生殖活动与所分析的任何气候变量均无关。在这两个物种中，脂肪的存储量与生殖活动成反比，雌雄之间的脂肪体重没有差异。我们得出的结论是，在此caatinga区域中，T。hispidus和T. semitaeniatus之间的隔离发生在垂直空间使用中，在微生境使用中T. hispidus的最大易变性，以及它们的食品xviii物品的较大范围大小。此外，这两个Tropidurus物种在活动时间，体温以及觅食和调节行为方面存在明显的季节性差异，这有助于它们共存。

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    Ribeiro Leonardo Barros;

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  • 年度 2010
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