Ecología trófica, dimorfismo sexual y parámetros reproductivos en el lagarto endémico Andino Liolaemus vallecurensis, Argentina

IF 0.5 4区生物学 Q4 ZOOLOGY Iheringia Serie Zoologia Pub Date : 2017-12-11 DOI:10.1590/1678-4766E2017046

G. Castillo, Héctor J. Villavicencio, J. Acosta, J. Marinero

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Abstract

The feeding habits, sexual dimorphism and reproductive parameters of Liolaemus vallecurensis (Pereyra, 1992) were assessed in an Andean sector of Argentina. We determined the total volume, number, and occurrence frequency of each prey item and calculated the relative importance indexes. Trophic indices (Levins) and diversity indices were applied as well. Also studied were morphological variations in 14 measurements, comparing adult males and females. The lizard L.vallecurensis feeds mostly on items from the order Hymenoptera (not Formicidae), with no differences being found between sexes or ages. Males show a tendency towards an active search strategy and a specialized diet. Females and juveniles hunt by stalking, and have a more opportunistic diet. Males are herbivores, females are omnivores and juveniles between insectivores and omnivores. Dimorphism was found between sexes for 10 morphological variables. Head length and food search mode were found to be associated. A viviparous condition is confirmed by a clutch size of three young, with parturition occurring between late December and early January. These contributions to L. vallecurensis represent the first and only biological data on this species in these harsh environments.

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阿根廷安第斯特有蜥蜴Liolaemus vallecurensis的营养生态学、性别二态性和生殖参数

食习惯,两性异形和生殖参数Liolaemus vallecurensis (Pereyra, 1992)在阿根廷的安第斯部门评估。测定各猎物的总体积、数量和发生频率，计算相对重要性指数。还采用了营养指数(Levins)和多样性指数。还研究了14个测量值的形态学变化，比较了成年雄性和雌性。L.vallecurensis蜥蜴主要以膜翅目(不是蚁科)的昆虫为食，在性别和年龄之间没有发现差异。雄性则倾向于积极的搜寻策略和专门的饮食。雌性和幼崽通过跟踪捕猎，并且有更多的机会主义饮食。雄虫为食草动物，雌虫为杂食动物，幼虫介于食虫动物和杂食动物之间。10个形态变量存在两性二态性。头部长度和寻找食物的方式有关联。胎生情况可以通过一窝三只幼崽的数量来确定，分娩时间在12月底到1月初之间。这些贡献代表了该物种在这些恶劣环境中的第一个也是唯一的生物学数据。

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来源期刊

Iheringia Serie Zoologia 生物-动物学

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Iheringia, Série Zoologia, edited by the “Museu de Ciências Naturais” of the “Fundação Zoobotânica do Rio Grande do Sul”, publishes original research findings in zoology with emphasis on taxonomy, systematics, morphology, natural history, and community or population ecology of species from current Neotropical fauna. Scientific notes will not be accepted for publication. Species lists without a taxonomic approach, or that are not the result of studies on the ecology or natural history of communities will not normally be accepted. The same applies to identification keys of groups of taxa defined by political boundaries. Authors wishing to inquire about the scope of the journal or the suitability of a particular topic are encouraged to contact the Editorial Board prior to submission. Furthermore, articles with a main focus on agronomy, veterinary, zootechny or other areas involving applied zoology will not be accepted. Its abbreviated title is Iheringia, Sér. Zool., which should be used in bibliographies, footnotes and bibliographical references and strips.