Monitoring of Eptesicus furinalis d’Orbigny & P. Gervais, 1847 maternity shelter in an area of mixed rain forest

Authors

DOI:

https://doi.org/10.37002/biodiversidadebrasileira.v15i2.2344

Keywords:

Banding , roost fidelity , sex proportion , bats

Abstract

Long-term studies enable understanding of the hitherto little known natural history of neotropical bat species. Monitoring shelters used by these animals for long periods and marking individuals can reveal aspects of their biology, ecology, and behavior that are essential to further scientific knowledge and to support activities targeting conservation of species.  In general, conservation units have relatively preserved natural environments and shelters used by bats that are protected from vandalism. The objectives of this study were to monitor a maternity colony of insectivorous bats of the species Eptesicus furinalis living in a stable roost and to test metal rings with flaps as a safe marking method to allow long-term studies. The roof of a wooden house with asbestos-cement tiles located in the São Francisco de Paula National Forest, Rio Grande do Sul, served as a roost for insectivorous bats Eptesicus furinalis. Bats were monitored by capture and banding of individuals leaving the shelter at nightfall from October 2010 to March 2014. Captured bats were weighed, had their body measurements taken, and their sex and reproductive status were recorded, before being marked with numbered metal lipped bands and were returned to shelter the same night. A total of 220 bats were banded, 109 of which were recaptured from one to six times each. Fifty-eight individuals were loyal to the shelter, being recaptured over more than one year. The sex proportion was 178 females and 42 males (4.24 females per male). Pregnancy was observed in November and December. Suckling occurs in December and January and juveniles are recruited from January to March. There is apparent reproductive inactivity from April to September. The metal lipped bands were effective for marking of individuals and enabled roost fidelity to be verified.

 

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Published

2025-06-02