摘要
Three different treatment methods, including topical application method, injection method and immersion method were employed to treat 17or - hydroxyprogesterone, so as to investigating its effect on ovarian development red swamp crayfish （Procambarus clarkii）. The results showed that all the three differ- ent methods could facilitate the synchronous ovarian development of red swamp crayfish at different degree, with the degree of maturity of 10% high compared with the control group. The highest maturity degree was 50% that was observed in immersion treatment group. The effect was determined as in order immersion method 〉 injection method 〉 topical apphcation method 〉 control group. The immersion method and the injection method could facilitate synchronization spawning of red swamp crayfish, with the order of immersion method 32.5%, injection method 20%, topical application 17.5% and the control group 17.5 %. Taking the synchro- nization spawning rate, final spawning rate and mortality into account, the order was the immersion method 〉 injection method 〉 topical application method 〉 control group.
Three different treatment methods, including topical application method, injection method and immersion method were employed to treat 17or - hydroxyprogesterone, so as to investigating its effect on ovarian development red swamp crayfish （Procambarus clarkii）. The results showed that all the three differ- ent methods could facilitate the synchronous ovarian development of red swamp crayfish at different degree, with the degree of maturity of 10% high compared with the control group. The highest maturity degree was 50% that was observed in immersion treatment group. The effect was determined as in order immersion method 〉 injection method 〉 topical apphcation method 〉 control group. The immersion method and the injection method could facilitate synchronization spawning of red swamp crayfish, with the order of immersion method 32.5%, injection method 20%, topical application 17.5% and the control group 17.5 %. Taking the synchro- nization spawning rate, final spawning rate and mortality into account, the order was the immersion method 〉 injection method 〉 topical application method 〉 control group.
