Ovarian development in the Amazonian red discus, Symphysodon discus Heckel (Osteichthyes: Cichlidae).
Braz J Biol
; 65(4): 609-16, 2005 Nov.
Article
em En
| MEDLINE
| ID: mdl-16532184
The Neotropical red discus fish, Symphysodon discus, originates from the Amazonian basin and has a discoid body. Although this species is popularly used in aquaria and is exported as an ornamental fish, it has not been intensively studied. The purpose of this work was to study the morphological and histological aspects of the ovarian development in the red discus. Forty females of S. discus of varying body sizes and different stages of gonadal development were used in this study. The ovaries were weighed and examined macroscopically in order to observe the maturation stages. Histological staining of hematoxilin-eosin was used for microscopic observations of the ovaries. Macroscopic observations showed immature, maturing, mature and partially spent stages of ovarian development. Microscopic examination of the ovaries revealed five stages and five phases of ovarian development. The ovaries of the mature females showed all the different phases of oocyte development, indicating the multiple spawning habit of this species.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ovário
/
Maturidade Sexual
/
Ciclídeos
Limite:
Animals
Idioma:
En
Revista:
Braz J Biol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil