Efeitos da sazonalidade sobre o metabolismo energético do morcego frugívoro Sturnira lilium (Chiroptera: Phyllostomidae) em fragmento de Mata Atlântica / Effects from seasonality about energy metabolism of fruit-eating bats Sturnira lilium (Chiroptera: Phyllostomidae) in Atlantic forest fragments

AUTOR(ES)

Mirlaine Soares Barros

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

11/08/2011

RESUMO

Little is known about the seasonal variation of storage and mobilization of energy reserves during the year in neotropical bats’ species. This study aimed at evaluating the influence of seasonality on energy reserves from male and female fruiteating bats (Sturnira lilium) in captured in Atlantic Forest fragments at Minas Gerais, Brasil. Bats were collected during the dry and rainy seasons near Viçosa – MG, Brazil, using mist nets. Following capture, animal were killed and blood and tissues were collected for metabolic determinations – muscles and liver glycogen, protein and lipids, as well as carcass fatty acids and adipose tissue weight/body weight. Statistical analyses were performed using two-way factorial ANOVA followed by the Tukey test at 5% significance. Data obtained here showed that most energy reserves depots remained unaltered over the annual seasons for bats from the same sex, and no differences between gender were observed in the same season. Breast muscle lipid concentration was highly accumulated in females captured during the dry season, and this level was significantly lower in malesin rainy season. During the rainy season, the same tissue in males presented the heist levels observed for protein content, which was minimal in the liver. Taken together, our results show little energy reserves variation in dry and rainy seasons in fruit-eating bats captured in forest fragments from south-eastern Brazil. Factors as constant availability of food items in the environment and the species’ ability to explore different plant families or protein items other than their preferential fruits might be associated. In conclusion, our results indicate that S. lilum seem to have developed adaptative strategies to maintain unvarying energy reserves concentrations, despite the preferential two annual peaks for reproductive activities reported for this species.

ASSUNTO(S)

frugívoros mata atlântica metabolismo morcegos fisiologia de orgaos e sistemas frugivorous atlantic forest metabolism bats seasonality sazonalidade

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