TY  - SER
AU  - Sanico,Avelino Fruta
TI  - Effects of 17a -Ethynyltestosterone and Estrone on sex ratio and growth of Tilapia Aurea (Steindachner)
SN  - 2672-2836
PY  - 1971///
CY  - Quezon City, Philippines
PB  - Bureau of Fisheries and Aquatic Resources
KW  - AGROVOC
KW  - Tilapia culture
KW  - LCHS
KW  - Fishes
KW  - Sex ratio
KW  - Growth
KW  - Tilapia aurea
KW  - Oreochromis aureus
KW  - Androgens
KW  - Estrogen
N1  - Includes bibliographical references
N2  - Tilapia aurea (Steindachner) were fed androgen (17a –ethynyl-testosterone) or estrone (estrone) at 30ug/gm or 100 ug/gm of diet respectively, for 22 days in steel troughs. Daily feeding was Purina Trout Chow, 12% of body weight divided into three equal portion. Untreated Purina Trout Chow at 12% of body weight divided into three equal portions. Untreated Purina Trout Chow at 10% of body weight was fed in rearing trials in both concrete tanks and earthen ponds once a day, six days a week. One hundred percent males were produced with the androgen in Trial I and 90.3% males in Trial II. Estrogen did not produce a significant effect on sex ratio. Fish treated with androgen had significantly (P<0.005) greater at four months of age, after having been reared in earthen ponds. There was no significant difference (P<0.005) in weight when the fish were sampled at 2 months of age. Estrogen at the dosage level of 100 ug/gm of diet had no effect on sex ratio in T. aurea
ER  -