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dc.contributor.authorBeguelini, Mateus R. [UNESP]
dc.contributor.authorTaboga, Sebastião R. [UNESP]
dc.contributor.authorMorielle-Versute, Eliana [UNESP]
dc.date.accessioned2014-05-27T11:30:46Z
dc.date.available2014-05-27T11:30:46Z
dc.date.issued2013-10-01
dc.identifierhttp://dx.doi.org/10.1002/jemt.22264
dc.identifier.citationMicroscopy Research and Technique, v. 76, n. 10, p. 1035-1049, 2013.
dc.identifier.issn1059-910X
dc.identifier.issn1097-0029
dc.identifier.urihttp://hdl.handle.net/11449/76679
dc.description.abstractMyotis nigricans is an endemic species of vespertilionid bat, from the Neotropical region, that resembles temperate zone bats in their reproductive cycle; presenting an annual reproductive cycle with two periods of testicular regression, which are not linked to the apoptotic process and seems to be not directly linked to any seasonal abiotic variation. Thus, this study aimed to ultrastructurally evaluate their reproductive cycle. The process of testicular regression could be divided into four periods: active; regressing; regressed and recrudescence; with all presenting distinct characteristics. The active period was similar to that of other bats, presenting the complete occurrence of spermatogenesis, with three main types of spermatogonia (Ad, Ap, and B) and 12 steps in spermatid differentiation; however, it differed in having the outer dense fibers 1, 5, 6, and 9 larger than the others. These three types of spermatogonia undergo considerable morphologic changes from regressing to the regressed period, and in the recrudescence, they return to the basic morphology, which reactivates spermatogenesis. In conclusion, our study described the process of spermatogenesis, the ultrastructure of the spermatozoa and the distinct morphologic variations in the ultrastructure of the testicular cells of M. nigricans during the four different periods of its annual reproductive cycle. Microsc. Res. Tech., 76:1035-1049, 2013. © 2013 Wiley Periodicals, Inc.en
dc.format.extent1035-1049
dc.language.isoeng
dc.relation.ispartofMicroscopy Research and Technique
dc.sourceScopus
dc.subjectMyotis nigricans
dc.subjectSpermatogenesis
dc.subjectSpermiogenesis
dc.subjectTesticular regression
dc.titleUltrastructural characteristics of the spermatogenesis during the four phases of the annual reproductive cycle of the black myotis bat, Myotis nigricans (Chiroptera: Vespertilionidae)en
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationDepartment of Biology UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, 15054-000
dc.description.affiliationDepartment of Zoology and Botany UNESP - Univ. Estadual Paulista, São José do Rio Preto, 15054-000, São Paulo
dc.description.affiliationUnespDepartment of Biology UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, 15054-000
dc.description.affiliationUnespDepartment of Zoology and Botany UNESP - Univ. Estadual Paulista, São José do Rio Preto, 15054-000, São Paulo
dc.identifier.doi10.1002/jemt.22264
dc.identifier.wosWOS:000325009900008
dc.rights.accessRightsAcesso restrito
dc.identifier.scopus2-s2.0-84884815847
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt
dc.identifier.orcid0000-0002-0970-4288
unesp.author.orcid0000-0002-0970-4288[2]
dc.relation.ispartofjcr1.087
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