Abstract
Grey mullet broodstock, maintained under a shifted photoperiod, were treated with controlled-release hormonal devices to accelerate gonadal development and subsequent spawning. The females received testosterone and a superactive GnRH analogue (GnRHa) given via slow-release devices (microspheres). The males received 17α-methyltestosterone via microspheres. Once oocytes reached the diameter of >500 μm, females were induced to spawn with GtH-calibrated carp pituitary extract followed 24 hours later by GnRHa administered via a sustained-release implant. The females were allowed to spawn in the presence of males. An average of 4.4 million eggs was obtained from each female, and the fertilization rate ranged from 20% to 98%.
Original language | English |
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Pages (from-to) | 214-221 |
Number of pages | 8 |
Journal | Israeli Journal of Aquaculture - Bamidgeh |
Volume | 49 |
Issue number | 4 |
State | Published - Dec 1997 |