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Luteinizing Hormone - Releasing Hormone analogue (LHRHa) is a solution that is applied as either an intraperitoneal (IP) or intramuscular (IM) injection. LHRHa is only available for purchase through Syndel USA. The use of hormones to induce spawning in fish is critical to the success of many aquatic programs that needs hormone treatment to complete final gamete maturation to ensure spawning. The primary goal of field studies conducted under INAD #8061 is to generate data to help determine appropriate LHRHa treatment regimens for inducing gamete maturation in a variety of cultured and wildstock finfish species. Fish may be treated at a dose range of 5 to 120 microgram (µg) LHRHa per kilogram (kg) body weight with single or multiple IP or IM injections. Multiple injections will generally consist of a single “priming dose,” followed by a single “resolving dose.” Fish may be immediately released for human food use. Note: if SYNCAINE or Aqui-S® 20E is used at time of injection, then the withdrawal time for the anesthetic must be followed. To participate in the INAD Program for LHRHa visit the  data collecting site.

Please read the Study Protocol prior to any treatments.  It contains the protocol, SDS, and a copy of the forms to be used as a guide for collecting data that will be entered into the online INAD database. The FDA authorization letter(s) for this INAD is currently only available by emailing Bonnie Johnson.