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Environmental Salinity Affects Growth and Metabolism in Fingerling Meagre (Argyrosomus Regius)

1
Department of Biology, Faculty of Marine and Environmental Sciences, Instituto Universitario de Investigación Marina (INMAR), Campus de Excelencia Internacional del Mar (CEI-MAR) University of Cadiz, 11510 Puerto Real, Cádiz, Spain
2
Departamento de Producción, IFAPA Centro El Toruño, Junta de Andalucía, E-11500 El Puerto de Santa María, Cádiz, Spain
3
Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 18 December 2018 / Revised: 29 January 2019 / Accepted: 30 January 2019 / Published: 5 February 2019
(This article belongs to the Special Issue Diversification of Aquaculture with New Fish Species)
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Abstract

The meagre (Argyrosomus regius), a farmed fish in Mediterranean countries, seasonally migrates from offshore areas to estuaries for reproduction. During the first two years of life, the meagre evidences a certain grade of euryhalinity by staying in brackish waters close to the shore. The aim of the present study was to establish if fingerling growth in brackish water is improved compared to seawater, where current culture procedures are conducted. Three-month-old fingerlings were maintained for 45 days under two different salinity regimens (12 and 39 ppt). Several growth parameters as well as osmoregulatory and metabolic variables were assessed. Specific growth rate and hepatosomatic index values revealed that fingerlings performed better in brackish waters (12 ppt) compared to 39 ppt. This study contributes to optimizing meagre rearing conditions, thereby supporting the role of A. regius in aquaculture diversification. View Full-Text
Keywords: Argyrosomus regius; fingerling; growth; meagre; osmoregulation; salinity Argyrosomus regius; fingerling; growth; meagre; osmoregulation; salinity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ruiz-Jarabo, I.; Tinoco, A.B.; Vargas-Chacoff, L.; Martos-Sitcha, J.A.; Rodríguez-Rúa, A.; Cárdenas, S.; Mancera, J.M. Environmental Salinity Affects Growth and Metabolism in Fingerling Meagre (Argyrosomus Regius). Fishes 2019, 4, 6.

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