Abstract

GALLIARI, Carlos A.  and  PARDINAS, Ulyses F. J.. Sigmodontine rodents of the Province of Misiones (Argentina): data synthesis after a decade of sporadic samplings. Ecología en Bolivia [online]. 2021, vol.56, n.1, pp.42-64. ISSN 1605-2528.

There have been only a very few collections of small mammals in the Misiones Province, Argentina, a fact that is reflected not only in a poor general knowledge of the sigmodontine rodent assemblages but also in their conservation status (i.e., many are characterized as data deficient). In this contribution, which partially follows the style of a "data paper," we summarize the results obtained through a little more than a decade of sampling, mostly undertaken in support of parasitological projects. We conducted field work in 21 localities representing several environments belonging to the Upper Paraná Atlantic forest, humid Araucaria forest, and fields and oldfields. A total of 1,026 individuals belonging to 17 species and 14 genera of sigmodontine and murine rodents were captured, after a cumulative effort of 12,662 trapping nights. Those species best represented were Akodon montensis (N = 700) and Oligoryzomys nigripes (n = 136), which typically inhabit disturbed environments. Those forms more strictly sylvan, such as Abrawayaomys chebezi, Castoria angustidens or Juliomys pictipes, were virtually absent. It is strongly recommended to expand surveys to the few better-preserved forest remnants and to have longer sampling periods as a strategy to increase species accumulation and detection of rare species. In addition, to increase trapping in the understory and canopy, which to date are lacking in systematic sampling in Misiones.

Keywords : Akodon montensis; Fields and oldfields; Humid Araucaria forest; Sigmodontinae; Upper Paraná Atlantic forest.

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