Castro Adela V, Porrini Darío P, Cicchino Armando C
Laboratorio de Artrópodos, GENEBSO-INBIOTEC-Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata, Buenos Aires, Argentina
Laboratorio de Artrópodos, GENEBSO-INBIOTEC-Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, 7600 Mar del Plata, Buenos Aires, Argentina.
J Insect Sci. 2014 Jan 1;14. doi: 10.1093/jisesa/ieu114. Print 2014.
The aim of this study was to describe the annual activity cycle, the sex ratio, and the relationship between the weather variables and activity density of the 16 most abundant carabid species of a typical southeastern region of Pampasia, Argentina. The study focused on the southernmost Celtis ehrenbergiana (Klotzsch) Liebmann ( = C. tala Guillies ex Planch) native forest of the region, from March 2008 to March 2009, a period during which there was a marked draught associated with the La Niña phenomenon. Forty-five pitfall traps were emptied once every 2 wk, and the occurrence of larvae, tenerals, and subtenerals was recorded. Photoperiod, temperature, and precipitations explained 35% of the total variation in the catch. Total carabid activity was high in early autumn and late spring. Eight species reached their maximum activity in spring, five in winter, two in summer, and one in autumn. Possible reproductive strategies, the influence of different variables involved in the life cycles of the species, and the sex ratio and their limitations are discussed.
本研究旨在描述阿根廷潘帕斯草原一个典型东南部地区16种最常见步甲物种的年度活动周期、性别比例，以及天气变量与活动密度之间的关系。该研究聚焦于该地区最南端的原生森林——埃伦贝格朴树（Celtis ehrenbergiana (Klotzsch) Liebmann，即塔拉朴树C. tala Guillies ex Planch），研究时间为2008年3月至2009年3月，在此期间发生了与拉尼娜现象相关的显著干旱。每两周清空一次45个陷阱，并记录幼虫、刚羽化的成虫和接近羽化的成虫的出现情况。光周期、温度和降水量解释了捕获量总变化的35%。步甲的总活动量在初秋和晚春较高。8个物种在春季达到活动高峰，5个在冬季，2个在夏季，1个在秋季。文中还讨论了可能的繁殖策略、物种生命周期中不同变量的影响、性别比例及其局限性。
