Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/76617
Título: Influence of Hormonal Induction and Broodstock Nutrition on Reproductive Performance and Spawning Quality of Greater Amberjack (Seriola Dumerili, Risso, 1810)
Autores/as: Sarih, Samira 
Director/a : Fernández Palacios, Hipólito 
Izquierdo López, María Soledad 
Clasificación UNESCO: 310502 Piscicultura
Fecha de publicación: 2020
Proyectos: Exploring The Biological And Sociio-Economic Potential Of New/Emerging Candidate Fish Species For The Expansion Of The European Aquaculture Industry 
Resumen: Greater amberjack Seriola dumerili is an excellent candidate marine fish species for European aquaculture. To date, the aquaculture production of this species has been very limited, due to the reproductive dysfunctions in captivity and the poor spawning quality. The main objective of the present thesis was to examine the Influence of hormonal induction and broodstock nutrition on spawning quality. In this sense, four specific objectives were established, in order to (1) compare the quality of spontaneous spawn with those obtained by either GnRHa injection or GnRHa implant protocols; (2) examine the effects of supplemental protein, histidine, and taurine in broodstock diets on eggs quality; (3) evaluate the effects of increasing dietary n-3 LC-PUFA levels on spawning performance and egg quality; and (4) investigate the effects of increased ARA levels in broodstock diets on reproductive performance. This thesis showed for the first time that it is possible to obtain very high-quality spontaneous spawn in greater amberjack, in relation to adequate tank size, environmental conditions, and broodstock nutrition. Weekly treatments with the GnRHa injections lead to spawns with similar egg and larval quality than spontaneous spawning and better than in previous studies. Raising histidine contents in broodstock diets from 1 to 1.5% optimized the reproductive performance of greater amberjack, particularly to improve fecundity and fertilization rates. Additionally, Increase in n-3 LC-PUFA levels up to 1.7% in broodstock diet improved the spawning quality in terms of fecundity, fertilization rate, egg viability at 24 h, hatching and larval survival rates. Finally, increase in ARA dietary level up to 3.2 g / kg of feed improved the reproductive performance of the broodfish as well as egg and larval quality.
Descripción: Programa de Doctorado en Acuicultura Sostenible y Ecosistemas Marinos por la Universidad de Las Palmas de Gran Canaria
URI: http://hdl.handle.net/10553/76617
Colección:Tesis doctoral
miniatura
Adobe PDF (5,45 MB)
Vista completa

Google ScholarTM

Verifica


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.