摘要:

Juvenile common carp were fed 11‐ketotestosterone for 60 days with the diet and the effect on food conversion efficiency, organ weights and protein and nucleic acids (RNA, DNA) content of the liver, kidney, brain and muscle were observed. Feeding of the steroid increased the food conversion efficiency of all the experimental groups studied as compared with controls. A decrease in weight of brain, liver and kidney in relation to body weight was noticed after 60 days of the hormone feeding. No change in the visceral weight was observed. These changes in relative weights of the organ were ameliorated 30 days after the withdrawal of the steroid from the food. The weight of the viscera decreased compared with the control weight during this time. Feeding of the hormone brought variable changes in the total proteins, RNA/DNA, protein/RNA and protein/DNA in all the organs studied. In addition to these findings, changes in the moisture, total lipid and ash contents of the muscle were also observed. The results are discussed in the light of existing knowledge of the effect of anabolic‐androgenic steroids on the growth processes of different organi

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1982.tb03898.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Levels of 11‐oxotestosterone (17 β‐hydroxyandrost‐4‐ene‐3, 11‐dione) and testosterone in the blood serum of individually marked adult male Atlantic salmon held in captivity, were measured by radioimmunoassay at approximately monthly intervals for periods of up to 18 months. In addition to peak concentrations of both hormones shown by all the maturing fish at the time to full sexual maturation during October and November, a majority of maturing fish also showed a significant elevation of 11‐oxotestosterone during the early months of the year. The possible involvement of this early elevation of 11‐oxotestosterone in controlling the mitotic multiplication of spermatogonia is discussed. Weight and length increases expressed as specific valuesGWandGLand weight to length relationships for the maturing males for each sampling period are presented and compared with those of n

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1982.tb03899.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY