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Open Access STATUS REPRODUKSI IKAN GABUS, Channa striata Blkr (Reproduction status snakehead, Channa striata)

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Research aimed to evaluate the reproduction status of snakehead in concrete tank  and in natural swamp aquatic. Seven indicators can be made by knowing the snakehead status indicator reproduction so that breeding manipulation in concrete tank can be done. The seven indicators were gonadosomatic indexs, hevatosomatic indexs, body weight, liver weight, gonade weight, egg diameter, fecundity and estradiol-17β concentrations. Result measurement of the gonadosomatic indexs of the snakehead in natural swamp aquatic show in Agust month was 3,3 ± 0.09 and hevatosomatic indexs was 1,1 ± 0.05 in Agust month. For gonadosomatic indexs and  hevatosomatic indexs in concrete tank in April month was 3.6 ± 0.09 and Januari month was 1.0 ± 0.08, respectively. Result of measurement the fecundity and egg diameter of the snakehead in concrete tank in Pebruary month was 2978.3 ± 7.64 and 1.3 ± 0.00 mm respectively, The fecundity and egg diameter of the snakehead in natural swamp aquatic in Januari month was 3080.0 ± 7.91 and Nopember and December was 1.5 ± 0.04 mm respectively. The estradiol-17β concentration of the snakehead in swamp aquatic show the higest concentration in natural aquatic. Average concentration estradiol-17β in natural aquatic in Juni month was 85.3 ± 9.37 pg/ml until December was 169.2 ± 6.22 pg/ml. In concrete tank from 80.5 ± 5.17 pg/ml in Juli until  118.3 ± 6.78 pg/ml in April. In general it is concluded that the reproduction status of snakehead was similar  between in concrete tank and natural swamp aquatic. Enviroment ”trigger” was the limited factor in finally gonade maturation.
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Document Type: Research Article

Publication date: January 1, 2017

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