Seasonal Reproductive Biology and Artificial Propagation of Female African Catfish (Clarias gariepinus) After Hormonal Stimulation

Abstract

The use of exogenous hormones to induce final oocyte maturation, ovulation, and spawning has become commonplace in the reproductive protocols for many species. In the present study, African catfish (Clarias gariepinus) were monthly collected from January to December 2011 for studying their monthly reproductive biology. Also, hormonal stimulation was done using ovaprim, human chorionic gonadotropin (hCG), and salmon gonadotropin releasing hormone analog (GnRHa). However, fish (337.2 -718.0 g) were divided into seven groups (each group contained four females and four males) and injected into the dorsal musculature by 0.4, 0.5 ml kg -1 Ovaprim, 1000, 3000 IU kg -1 hCG, and 0.75, 1 ml kg -1 GnRHa. The control group was injected by 0.9% saline. At the dosage tested, gonado-somatic index (GSI), absolute fecundity, ovulation index, egg diameter, fertilization rate were significantly affected in all stimulated groups. It was found that the hormonal treatments are a useful method for commercial African catfish breeders to ensure the continuity of access larvae. However, the best reproductive performance was obtained at 0.5 ml kg -1 ovaprim, 3000 IU kg -1 hCG, and 0.75 ml kg -1 GnRHa.

Enhancing the supply and self-sufficiency of animal protein for local population through artificial propagation of African sharptooth catfish Clarias gariepinus (Burchell, 1822)

“…The males and females of C. gariepinus are easily distinguishable during the adult stage on the basis of genital papillae, which are rounded and protruding in the females while males have long pointed genital papillae. 61 Mature females typically have a swollen and soft belly which is often full of eggs that are released at the slightest abdominal pressure (Figure 2B). These characteristics are good signs of sexual maturity and were therefore used to choose females for the artificial reproduction.…”

Female maturation and rematuration acceleration of Mutiara strain catfish (Clarias gariepinus) using combination of oocyte developer hormone and astaxanthin addition diet

“…However, North African catfish production has been marked by scarcity of the seeds problems, caused by the gap between increased market demands which was not followed by increased in seeds supply because the seeds production is still very low. This is because North African catfish are like other tropical fish that breeding seasonally (Saadony et al, 2014), and only breeding during the rainy season (Dadebo et al, 2011).…”

MATURASI IKAN LELE MUTIARA Clarias gariepinus BETINA DENGAN ESTRADIOL-17? MELALUI PAKAN

“…Produksi benih lele mutiara rendah dikarenakan waktu matang gonad pertama kalinya tergolong lama yaitu pada saat umur 10 bulan dan siklus pemijahannya yaitu setiap 1,5 bulan sekali (Iswanto et al, 2016). Ikan lele seperti ikan tropis lainnya hanya memijah musiman yang dipelihara di wadah budidaya (Nguenga et al, 2004), serta spesies lele masuk dalam kelompok ikan yang pemijahannya hanya satu kali dalam musim pemijahan dan hanya memijah pada musim hujan (Saadony et al, 2014). kuning telur pada tahap akhir (Mylonas dan Zohar, 2001), yang keduanya merupakan pusat pengontrol proses hormon steroid (Lubzens et al, 2010).…”