Hormon Pemicu TKG

By Rani Rehulina Tarigan
Macam2 hormon pemacu perkembangan gonad
Menurut Crim (1991) dalam Zairin (2003) hormon yang potensial digunakan untuk merangsang ovulasi dan pemijahan pada dasarnya  dapar dibagi menjadi 3 kelompok yaitu sebagai berikut :
1. Gonadotropin
2.LHRH-a n (Luteinizing Hormone Releasing Hormone)
3. Steroid
Perkembangan gonad pada ikan membutuhkan hormon gonadotropin yang dilepaskan oleh kelenjar pituitari yang kemudian terbawa aliran darah masuk ke gonad. Gonadotropin kemudian masuk ke sel teka, menstimulir terbentuknya testosteron yang kemudian akan masuk ke sel granulosa untuk diubah oleh enzim aromatase menjadi estradiol 17β. Hormon estradiol 17β kemudian masuk ke dalam hati melalui aliran darah dan merangsang hati untuk mensintesis vitelogenin yang akan dialirkan lewat darah menuju gonad untuk diserap oleh oosit sehingga penyerapan vitelogenin ini disertai dengan perkembangan diameter telur (Sumantri 2006) dalam ( Permadi, 2009 hal 17)
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