Induced spawning of Pimelodus pictus with carp hypophysis extract (CHE) and Ovaprim®
Journal Title: Revista MVZ Cordoba - Year 2011, Vol 16, Issue 1
Abstract
Objective. To induce spawning on Pimelodus pictus and to evaluate the response on total ova recovered maturation and ovulation rate using two hormonal treatments. Materials and methods. Mature females were captured and immediately induced with Carp Pituitary Extract (CPE) and a mixture of an analogue of salmon Gonadotropin-releasing hormone plus domperidone (Ovaprim®). A total doses of 5.5 and 7.7 mg/kg and 0.5 and 1 ml/kg, were used. The total dose was divided into two doses and injected with an interval of 12 h (first dose: 10% and second dose: 90% respectively). Results. Females from all treatments responded with greater than 50%, to a latent time of 6 h 30±20 min at 27.4±0.2°C, the response being higher for both protocols with CPE (p<0.05). The oocyte diameter before, during, and after all treatments increased, being higher and different (p<0.05) for the treatments with Ovaprim®. Fecundity reproductive ranged from 818 to 1185 ova/female, with this variability being further discussed. Conclusions. This study demonstrates the potential of induced breeding with Pimelodus pictus as host for two hormonal inducers with the primary option being the use of CPE.
Authors and Affiliations
Elizabeth Aya B, M. Sc| Universidad de los Llanos, Instituto de Acuicultura de los Llanos (IALL), km7 vía Pto López, Villavicencio (Meta) Colombia. Correspondencia: elizaya27@yahoo.com, José Arias C, Ph. D| Universidad de los Llanos, Instituto de Acuicultura de los Llanos (IALL), km7 vía Pto López, Villavicencio (Meta) Colombia.
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