title: Comparative analysis on natural spawning of F1 meagre, Argyrosomus regius, with wild broodstock spawns in Portugal.
abstract: The purpose of this study was to describe and compare the reproductive success and egg and larvae quality between wild and first-generation (F1) breeders of Argyrosomus regius. Wild broodstock were adapted to captivity, and good-quality spawns were obtained in 2009-2010, after GnRH treatment. In 2012, the F1 meagre (3 years old) spawned naturally at IPMA's Aquaculture Research Station facilities. From each spawning event, the following parameters were determined: number of floating and non-floating eggs, egg size, hatching success and larval total length. Eggs size and percentage of hatching obtained from F1 breeders (1.04 ± 0.10 mm and 90.5 ± 6.4%) were significantly higher when compared with wild breeders (0.97 ± 0.13 mm and 17.0 ± 12.7%). Although wild breeder spawns exhibited 2.7 ± 0.2 mm for larval total length, F1 breeder spawns presented 2.6 ± 0.2 mm. The wild and F1 breeder spawns exhibit a good egg and larval quality, indicating a promising starting point for a successful meagre hatchery production.
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal. fsoares@ipma.pt.
authors.forename: Florbela
authors.initials: F
authors.lastname: Soares
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Laura
authors.initials: L
authors.lastname: Ribeiro
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Margarida
authors.initials: M
authors.lastname: Gamboa
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Sílvia
authors.initials: S
authors.lastname: Duarte
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Ana Candeias
authors.initials: AC
authors.lastname: Mendes
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Sara
authors.initials: S
authors.lastname: Castanho
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Marisa
authors.initials: M
authors.lastname: Barata
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Tânia Margarida
authors.initials: TM
authors.lastname: Lourenço
authors.affiliation: IPMA - Portuguese Institute for the Sea and Atmosphere/EPPO - Aquaculture Research Station, Av. 5 de Outubro s/n, 8700-305, Olhão, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Pousão-Ferreira
mesh_terms: D000818:Animals; D017756:Aquaculture / Q000379:methods*; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage; D007814:Larva / Q000502:physiology; D010063:Ovum / Q000502:physiology; D010473:Perciformes / Q000502:physiology*; D011174:Portugal; D012098:Reproduction
chemical_list: D007987:Gonadotropin-Releasing Hormone
keywords: Eggs quality; Hormonal induction; Meagre; Natural spawn; Reproduction