Evaluation of the effectiveness and cost of different hormones in stimulating the spawning of thin lipped grey mullet, Liza ramada

Morphological study of larval development and the transition to juvenile stage in thin-lipped mullet, Liza ramada

“…After induced spawning with hormonal and environmental stimulation [22] and obtaining of Liza ramada larvae, the newly hatched larvae were stocked at a density of 20 individuals (ind) L-1 in glass aquaria (three aquaria; 50 L capacity each). The aquaria contain sterilized sea-water (32‰ salinity) at a temperature of 21±2°C; under different feeding regimes [23] for three periods.…”

“…Despite the successes in artificial propagation of the mullet, by artificial spawning [1,21,22] , there is still a need to refine further techniques of larval rearing particularly for practical and commercial applications. In our previous limited study [1] , we described the newly hatched larvae of thinlipped mullet, Liza ramada only until 5 days post-hatching.…”

Biochemical evaluation of the carp hypophyseal homogenate as spawning stimulator in teleosts

“…Recently, with the increase in the prices of synthetic hormones, the tendency to use the pituitary gland extract has witnessed a great increase as a stimulator for spawning in fish (Mehdi & Ehsan, 2011;Mousa et al, 2018a). However, disadvantages have been detected with respect to this method, such as the lack of knowledge about the contents of different hormones extracted from the pituitary gland, which depend on the stage of fish maturity from which the gland is extracted (Mousa et al, 2018a).…”

“…Hormones of ACTH, GH, and PRL have a key role in the adaptation of fish to different salinities (Mousa et al, 2015). In addition, ACTH plays a major role in the stress response in spawned fish (Pickering, 1981;Leloup-Hatey, 1985;Balm et at., 1994;Mousa et al, 2015;Mousa et al, 2018a). Notedly, the gonadotropins (I, II), similar to the hormone (LH, FSH) in mammals, are the basis for stimulating the gonads in the secretion of sex hormones for the development and maturation of the gonads (Swanson, 1991;Prat et al, 1996).…”

“…Most of the previous studies used the hypophysis of common carp and avoidedother carp species. In our recent work, we used the hypophysis of silver carp which gave higher rate of ovulation in L. ramada compared to those of common carp hypophysis or human chorionic gonadotropin (Mousa et al, 2018a).…”