Manipulation of ovulation and spawning in fish
AssigneeIsrael Oceanographic and Limnological Research Ltd.
InventorJonathan Zohar
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Abstract
Administration into fish of gonadotropin releasing hormone (GnRH), luteinising releasing hormone (LHRH) and their analogs in a polymer based sustained release delivery system was found to induce a prolonged elevation in the fish's plasma level of gonadotropin (GtH), which leads to ovulation and spawning. Such induction of ovulation and spawning was found to occur both within the natural spawning season and outside this season. Such administration thus enables for the first time an effective means for manipulating reproduction in fish, which is a very important factor in the economic management of fish farming.
Claims9
A method for the induction and synchronization of ovulation, spawning, sperm production and spermiation in fish, which comprises administering to the fish an effective amount of an active compound selected from the group consisting of GnRH, LHRH, GnRH analogs, LHRH analogs and non-toxic salts of any of those compound, wherein said active compound is embedded in a biodegradable polymer based carrier matrix, and wherein said carrier matrix is (i) biocompatible with said fish and said active compound and (ii) confers sustained release properties on said active compound when said composition is administered to said fish.
Dependencies are inferred from the claim text.