Comparative study of the gular gland of three species of Molossidae bats (Mammalia: Chiroptera) from South America

Author:

Rodriguez Florencia Evelyn12ORCID,Olea Gabriela Beatriz23ORCID,Aguirre María Victoria1,Argoitia María Antonella24ORCID,Claver Juan5,Lombardo Daniel Marcelo25ORCID

Affiliation:

1. Laboratorio de Investigaciones Bioquímicas (LIBIM) Universidad Nacional del Nordeste, Facultad de Medicina, Instituto de Química Básica y Aplicada del NEA (IQUIBA NEA‐UNNE‐CONICET) Corrientes Argentina

2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Buenos Aires Argentina

3. Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias, Cátedra de Histología y Embriología Corrientes Argentina

4. Departamento de Biología Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura Corrientes Argentina

5. Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Cátedra de Histología y Embriología Universidad de Buenos Aires Buenos Aires Argentina

Abstract

AbstractThe gular gland is a skin gland located in the suprasternal region of adult males of some bat families. Knowledge of the morphology and functional aspects of these gland types is often limited. This study aimed to describe the structure and composition of the gular glands of three molossid species (Eumops patagonicus, Molossus fluminensis and Molossus molossus) with respect to their reproductive activity and to define the mechanism involved in secretion release. Different histological, histochemical and immunohistochemical techniques were used to achieve these goals. The results revealed that the size and composition of this gland are variable and are mostly related to the lipid content during the reproductive season. The results also documented, for the first time, the occurrence of mechanoreceptors associated with the surface of the glandular duct by detecting an S100 protein, indicating that an external stimulus activates secretion. Previous studies on other species have classified the gland using obsolete criteria; hence, we adopted a new classification of adenomeres in this study. Moreover, we investigated the gland secretion mechanism previously proposed. This study defines the implications of this gland in the reproduction of this species. Our preliminary interpretation of the function of the gular gland is that it is a cutaneous exocrine gland activated by mechanoreceptors involved in the reproductive behaviour of the Molossidae family.

Funder

Secretaría General de Ciencia y Técnica, Universidad Nacional del Nordeste

Publisher

Wiley

Subject

Ecology, Evolution, Behavior and Systematics,Histology,Biotechnology,Anatomy

Reference35 articles.

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