Eficacia de la inducción hormonal con distintas dosis de GnRHa en corvina (Argyrosomus regius)

[EN]The objective of this experiment was to determine the efficacy of different GnRHa doses for the induction of the spawning in meagre broodstock born in captivity. Five experimental groups were established, and one control group that was not injected. Fish were acclimated in six 10 m3 tanks, and in each tank there was 3? and 4? with an average weight of 8.33±0.97 and 8.47±1.09 kg respectively. Throughout the experimental period (April 14- June 2 of 2009), broodstock were induced on a weekly basis. Each time one female and two males from each of the five experimental groups were induced with an injection of GnRHa at the doses of 10, 20, 30, 40 and 50 ?g.kg-1 respectively. No significant differences were found in any of the controlled parameters: % of injected females with spawning, latency period and % of spawns. Although the highest spawning ratio was obtained with the lower doses, a statistically significant negative correlation between the doses and percentage spawning was found.

Eficacia de la inducción hormonal, con distintas dosis de GnRHa, en reproductores de corvina (Argyrosomus regius) : efecto sobre la producción y la calidad de las puestas

Máster Oficial en Cultivos Marinos. Trabajo presentado como requisito parcial para la obtención del Título de Máster Oficial en Cultivos Marinos, otorgado por la Universidad de Las Palmas de Gran Canaria (ULPGC), el Instituto Canario de Ciencias Marinas (ICCM), y el Centro Internacional de Altos Estudios Agronómicos Mediterráneos de Zaragoza (CIHEAM)

Eficacia de la inducción hormonal con GCH y GnRHa en reproductores de corvina (Argyrosomus regius).

[EN]Eighteen mature meagre (Argyrosomus regius) broodstock, born in captivity, were divided in 3 experimental groups in ratios of 3 ♀ and 3 ♂ each. One group was inducted by injections of hCG, the other with GnRHa and the last group with implants of GnRHa. In all three treatments all females responded positively to the hormonal treatment. Statistically differences were found, in the number of spawns per induction, of females induced with hCG with the GnRHa treatments. Latency period was longer in spawns from GnRHa implants, and showed statistically differences with the other two treatments.