cher ami, sur la liste anglophone, il y a quelques jours, Will demandait à Dr El-Sayed de l'informer sur l'état de la situation de la production de tilapia monosexe et la réponse est que l'utilisation de l'hormone 17-alpha-methyl-testostérone y est interdite. Je suis étonné de voir que dès vous puissiez vous en procurer à partir de l'Egypte. Ci-joint du courrier de réponse de Dr El-Sayed, Cordialement, G. Delincé Sujet: [Sarnissa] Monosex tilapia in Egypt Date : Wed, 11 Apr 2012 23:11:32 +0200 De : Abdel-fattah El-Sayed <afmelsayed(a)gmail.com> Pour : William Leschen <william.leschen(a)stir.ac.uk>uk>, sarnissa-african-aquaculture(a)lists.stir.ac.uk Dear colleagues I was asked by Will to update him and SARNISSA forum -- on the current position legally and also actually in practice on the ground -- regarding monosex tilapia production in Egypt using Methyltestosterone hormone (?-17MT). Let me first provide you with a quick overview about the magnitude of this important sector in Egypt. Aquaculture production amounted 919585 mt in 2010, contributing 70.5% to total fish production, and making Egypt among the top 10 aquaculture producing countries in the world. Nile tilapia, which is the only tilapia species cultured in Egypt, contributed 557049 mt in 2010, representing 60.6% of total aquaculture production. This huge amount of tilapia has made the prices of fish, particularly tilapia, stable in local fish market for over a decade. Most of produced tilapia are sex-reversed (all-male) using ?-17MT. Officially, ?-17MT is banned in Egypt. It has been prohibited for many years. But, there is different story on the ground. This hormone is very widely used. Most of large-scale tilapia hatcheries use this technique and sell all-male tilapia all over the country. Even small-scale farmers- particularly educated farmers who have some knowledge about this know-how- produce their own monosex tilapia. Unfortunately, monitoring the use of this hormone in the production of monosex tilapia by the government is very weak and not effective at all. In fact, there has been a dialogue for years between the scientific community and stakeholders on one hand, and the government on the other, on whether the current prohibition on use of ?-17MT must be fully supported and applied on scientific basis and precautions or lifted. Hope this information helps Abdel-Fattah M. El-Sayed Le 12/04/2012 17:19, Geovanne NZIENGUI a écrit :