Reproductive cycle of male matrinxa, Brycon cephalus
Braz. j. morphol. sci
;
17(2): 101-105, jul.-dez. 2000. ilus
Article
in English
| LILACS
| ID: lil-313965
RESUMO
The matrinxa (Brycon cephalus) is an abundant and economically important fish found in the Amazon river basin in Brazil. The seasonal morphological changes in the testes of this fish were studied. Captive-bred specimens were obtained from a breeding center between March 1994 and February 1996. The testes were classified as being of the tubular, unrestricted spermatogonial type, in which four phases of germ cells (spermatogonia, spermatocytes (primary as secondary), spermatids and spermatozoa) were identified. Based on the macro, and microscopic analyses of testes, and on the gonadosomatic index, four stages of germ cell development (resting, maturation, mature and regression) were identified.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Sperm Maturation
/
Spermatozoa
Limits:
Animals
Language:
English
Journal:
Braz. j. morphol. sci
Journal subject:
Anatomy
Year:
2000
Type:
Article
Affiliation country:
Brazil
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