title: Morphometry and morphology of nucleus of the Sertoli and interstitial cells of the tambaqui Colossoma macropomum (Cuvier, 1881) (Pisces: Characidae) during the reproductive cycle.
abstract: This study allowed the characterization of the tambaqui Colossoma macropomum testes structural organization, emphasizing Sertoli and interstitial cells and analyzing morphometrically the Sertoli cell nucleus diameter and the interstitial tissue area during the reproductive cycle. Fragments of tambaqui testes were collected in the following reproductive cycle stages: immature, resting, maturation I and II, mature, and regression, and were histologically processed. The Sertoli cells were found at the periphery of the cysts of germinative lineage cells and the nuclei were shown to be smaller as these cells developed. The interstitial cells were better observed between the seminiferous lobules next to vessels in the interstitial tissue of maturing testes.
authors.affiliation: Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, UNESP, Via de Acesso Paulo Donato Castellane, km 05, CEP 14884-900, Jaboticabal, SP, Brazil. laurankg@fcav.unesp.br
authors.forename: L S O
authors.initials: LS
authors.lastname: Nakaghi
authors.forename: D
authors.initials: D
authors.lastname: Mitsuiki
authors.forename: H S L
authors.initials: HS
authors.lastname: Santos
authors.forename: M R
authors.initials: MR
authors.lastname: Pacheco
authors.forename: L N
authors.initials: LN
authors.lastname: Ganeco
mesh_terms: D000818:Animals; D022003:Cell Nucleus Structures; D005399:Fishes / Q000033:anatomy & histology* / Q000502:physiology; D007985:Leydig Cells / Q000648:ultrastructure*; D008297:Male; D012098:Reproduction / Q000502:physiology*; D012708:Sertoli Cells / Q000648:ultrastructure*; D013737:Testis / Q000166:cytology