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Year 2019 - Volume 39, Number 6
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Seasonal influence on testicular morphophysiological parameters of bat Carollia perspicillata in fragments of the Atlantic Forest, northeastern Brazil, 39(6):429-433
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ABSTRACT.- Arandas M.J.G., Teixeira A.A.C., Texeira V.W., Silva F.R., Marinho K.S.N., Lima Junior N.B., Júnior F.C.A.A & Santos K.R.P. 2019. Seasonal influence on testicular morphophysiological parameters of bat Carollia perspicillata in fragments of the Atlantic Forest, northeastern Brazil. [Influência sazonal sobre os parâmetros morfofisiológicos testiculares de Carollia perspicillata (Chiroptera: Phyllostomidae) em fragmentos florestais de Mata Atlântica, Nordeste do Brasil.] Pesquisa Veterinária Brasileira 39(6):429-433. Departamento de Morfologia e Fisiologia Animal, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE 52171-900, Brazil. E-mail: julianaarandas@hotmail.com
Bats belong to the order Chiroptera, family Phyllostomidae, and present a wide diversity of reproductive strategies. However, information on the reproductive biology of male bats is scarce, mainly in the Northeast Region of Brazil. Thus, this study evaluated the seasonal testicular histomorphometry of the bat Carollia perspicillata in fragments of the Atlantic Forest in Pernambuco state. To this end, adult males were collected, euthanized for removal of the testicles, and later submitted to a routine histological technique. Histomorphometric analysis included assessment of the areas of tubular and intertubular compartment occupation, as well as quantification of spermatocytes, rounded spermatids, elongated spermatids, and Sertoli and Leydig cells. Results indicated that this bat species presents reproductive seasonality, because significantly higher averages of the testicular parameters were observed in the rainy season, which is a period of greater availability of food resources. Such inferences indicate that there is a synchrony between peak spermatogenesis and hormonal inversion in the months of high precipitation; furthermore, a higher carrying capacity of the Sertoli cells is noted. C. perspicillata males possibly present greater sperm and androgenic activity in the rainy season, associated with increased tubular area and number of spermatogenic cells, as well as with the intertubular area and number of Leydig cells, respectively. |
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