Effects of 17a -Ethynyltestosterone and Estrone on sex ratio and growth of Tilapia Aurea (Steindachner) / Avelino Fruta Sanico

By:

Sanico, Avelino Fruta

Material type: Article

ArticlePublisher: Quezon City, Philippines : Bureau of Fisheries and Aquatic Resources , 1971Content type:

text

Media type:

computer

Carrier type:

online resource

ISSN:

2672-2836 (Online)

Subject(s):

In: Philippines. The Philippine Journal of Fisheries Volume 13, Issue no. 1 & 2 (1975), page 1-17Abstract: 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.

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Holdings
Item type	Current library	Collection	Call number	Vol info	Status	Date due	Barcode
Journal Article	NFRDI Central Office NFRDI KMRC Indexed Materials Collection	Electronic		Volume 13, Issue no. 1 & 2 (1975), page 1-17	Available		IMC000103
Journal	NFRDI Central Office NFRDI KMRC Institutional Repository Collection	Electronic	SH 1 .B9524 1975 vol. 13 no. 1 & 2 (Browse shelf(Opens below))	Volume 13, No. 1 & 2 (1975)	Available		IRC00018

Includes bibliographical references

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.

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