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.

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This study was supported by the Project AQUACOR (PROMAR 31-03-05FEP-003) and FCT-‘Ciência 2008 program’.
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Soares, F., Ribeiro, L., Gamboa, M. et al. Comparative analysis on natural spawning of F1 meagre, Argyrosomus regius, with wild broodstock spawns in Portugal. Fish Physiol Biochem 41, 1509–1514 (2015). https://doi.org/10.1007/s10695-015-0103-4
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DOI: https://doi.org/10.1007/s10695-015-0103-4

