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Mating strategies of Pampean mouse males

机译：Pampean小鼠雄性的交配策略

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Patterns of space use and sexual dimorphism are frequently used to infer mating systems. We examined body size and home range size and intra- and intersexual overlap degree in order to elucidate mating strategy of Akodon azarae males. We studied spacing patterns using 113 and 129 home ranges established by males and females, respectively, in four 0.25 ha enclosures during the breeding season. Significant differences between sexes in home range size and overlap degree were found. Male home ranges were always larger than those of females. We observed exclusive space use among males and among females. Considering only those males that shared their home ranges with females, average intersexual overlap value was about 50%. Males mainly overlap their home ranges with home ranges of two or three females. Significant differences in body size were found between males and females, with males being larger. We concluded that space use and sexual dimorphism in this species is consistent with patterns characteristic of polygynous rodents, and we propose a polygynous system in A. azarae.
机译：空间使用和性二态性的模式经常用于推断交配系统。我们研究了体型和家庭范围的大小以及雌性和雌性之间的重叠程度，以阐明Akodon azarae雄性的交配策略。在繁殖季节，我们分别使用雄性和雌性分别建立的113个和129个居家范围研究间隔模式，在四个0.25公顷的圈地中。发现家庭范围大小和重叠程度之间的性别之间存在显着差异。男性的房屋范围总是大于女性的范围。我们观察到男性和女性之间对空间的独占使用。仅考虑那些与女性共享住所的男性，平均两性重叠值约为50％。男性主要与两个或三个女性的家庭范围重叠。男性和女性之间的体型差异显着，男性更大。我们得出的结论是，该物种的空间利用和有性二态性与多雌性啮齿动物的模式特征相一致，并且我们提出了A. azarae中的多雌性系统。

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