Changes in tissue cholesterol and serum cortisol level during four reproductive phases of the male freshwater fish, Notopterus notopterus.
J Environ Biol
;
2005 Oct; 26(4): 701-4
Article
in English
| IMSEAR
| ID: sea-113445
ABSTRACT
The tissue cholesterol and serum cortisol changes during four reproductive phases has been studied in the freshwater fish Notopterus notopterus of male sex during four phases, preparatory (January - March), prespawning (April - May), spawning (August - September) and post spawning (November - December). The cholesterol content of the testis and liver increased during preparatory phase and maximum content of cholesterol was during spawning phase. The serum cortisol estimated by radioimmunoassay (RIA) technique which indicated that the level of the hormone was high during pre-spawning and spawning phases compared to other two phases. The increase in cholesterol during preparatory and spawning phases may be because of increase in cortisol synthesis needed for testicular growth and spermetogenesis during these phases. The gonadosomatic index (GSI) also increased during these phases.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Reproduction
/
Testis
/
Male
/
Hydrocortisone
/
Radioimmunoassay
/
Cholesterol
/
Fishes
/
Fresh Water
/
India
/
Liver
Country/Region as subject:
Asia
Language:
English
Journal:
J Environ Biol
Year:
2005
Type:
Article
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