EFFECTS OF 17α-ETHINIL ESTRADIOL ON FEMINIZATION OF RAINBOW TROUT (ONCORHYNCHUS MYKISS)

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NAJI TAHEREH; NEJATKHAH MANAVI PARISA; RAZMI KOMEYL

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Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY Year:2009 | Volume:11 | Issue:3 (42) Page(s): 295-302

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Title

EFFECTS OF 17α-ETHINIL ESTRADIOL ON FEMINIZATION OF RAINBOW TROUT (ONCORHYNCHUS MYKISS)

Author(s)

NAJI TAHEREH | NEJATKHAH MANAVI PARISA | RAZMI KOMEYL | Issue Writer Certificate

Keywords

ONCORHYNCHUS MYKISSQ2

FEMINIZATIONQ3

SEX REVERSALQ3

17α-ETHINIL ESTRADIOLQ3

IMMERSIONQ3

Abstract

This study aimed at assessing the effects of 17a-ethinil estradiol on FEMINIZATION of rainbow trout in the stage of yolk-sac absorption and the relationship between period of IMMERSION and SEX REVERSAL percentage.To this end, 400 sac fry larvae were divided equally in 4 separate treatments. The investigation was performed in one stage and in different time periods in a bath containing 400μg/lit 17a-ethinil estradiol using IMMERSION method. Treatment 1 for 1 hour, treatment 2 for 2 hours, treatment 3 for 4 hours, and treatment 4 for 8 hours were exposed to this hormone. Treatment 5 was used as the control group. In treatment 4, the mortality started after two days and all (100%) of the larvae died after one month, in treatment 3, mortality started after one week and after 40 days, 100% of the larvae died. It is necessary to mention that in both treatments, the larvae absorbed the yolk-sac later that those of the control group. The results indicated that 74.3% of the fish in treatment 1 and 94.4% in treatment 2 were female. The comparison of the results with the sex ratio in the control group that consisted of 35% female fish and 65% male fish showed that immersing sac fry larvae in the bath containing 17a-ethinil estradiol hormone could cause the SEX REVERSAL in this group of fish. The mortality rates in both treatments 1 and 2 were completely normal, and similar to the mortality rate in the control group. In all hormone-treated groups, a significant difference in mean weight and length was observed as compared with the control group (p<0.05).

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APA: Copy

NAJI, TAHEREH, NEJATKHAH MANAVI, PARISA, & RAZMI, KOMEYL. (2009). EFFECTS OF 17α-ETHINIL ESTRADIOL ON FEMINIZATION OF RAINBOW TROUT (ONCORHYNCHUS MYKISS). JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 11(3 (42)), 295-302. SID. https://sid.ir/paper/87239/en

Vancouver: Copy

NAJI TAHEREH, NEJATKHAH MANAVI PARISA, RAZMI KOMEYL. EFFECTS OF 17α-ETHINIL ESTRADIOL ON FEMINIZATION OF RAINBOW TROUT (ONCORHYNCHUS MYKISS). JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY[Internet]. 2009;11(3 (42)):295-302. Available from: https://sid.ir/paper/87239/en

IEEE: Copy

TAHEREH NAJI, PARISA NEJATKHAH MANAVI, and KOMEYL RAZMI, “EFFECTS OF 17α-ETHINIL ESTRADIOL ON FEMINIZATION OF RAINBOW TROUT (ONCORHYNCHUS MYKISS),” JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, vol. 11, no. 3 (42), pp. 295–302, 2009, [Online]. Available: https://sid.ir/paper/87239/en

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