Data/hora: 02/06/2024 14:50:10

Provedor de dados: | Zoologia
País: | Brazil
Título: | Testicular structure of three species of neotropical freshwater pimelodids (Pisces, Pimelodidae)
Autores: | Cruz,Rodrigo José Guimarães; Santos,José Enemir dos.
Data: | 2004-06-01
Ano: | 2004
Palavras-chave: | Fringed testes; Secretion; Seminal vesicle; Siluriformes; Testicular gland.
Resumo: | The testes structure of the following Siluriformes was studied: Pimelodus maculatus (Lacepède, 1803), Iheringichtys labrosus (Lütken, 1874) and Conorhynchos conirostris (Valenciennes, 1840). The testes of these species were dissected into cranial and caudal regions. The fringes of mature testes were counted and measured. Student's t-test was used to identify significant differences between fringe lengths of the two regions. To study the whole testes of each species in its resting and mature stage, testes were fixed in Bouin liquid for 6-8 hours and submitted to routine histological techniques. Standard histochemical techniques were used to detect carbohydrates and proteins. The testes of all species were paired and fringed organs. Histologically, cranial fringes of all species were spermatogenic with cells inside cysts at the same phase of development. Caudal fringes of C. conirostris were spermatogenic; while P. maculatus and I. labrosus showed caudal fringes only during secretion. Histochemically, neutral glycoproteins, acid glycoconjugates, acid carboxilates, sialomucines, and acid and sulfates glycoconjugates were detected in the caudal fringe secretions of P. maculatus; and neutral glycoproteins in I. labrosus. Significant differences between the fringe lengths of the cranial and caudal regions were found for all the species studied.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000200016
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S0101-81752004000200016
Formato: | text/html
Fonte: | Revista Brasileira de Zoologia  v.21 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess