Effect of Stocking Density on Survival and Growth of Brown Meagre Sciaena umbra (L.) Larvae - Sciences pour l'Environnement Access content directly
Journal Articles Fishes Year : 2024

Effect of Stocking Density on Survival and Growth of Brown Meagre Sciaena umbra (L.) Larvae

Rémi Millot
Mikaël Demolliens
Jean-José Filippi
Sally Pugliese
  • Function : Author
Alban Delmas
  • Function : Author
Alizée Boussard
  • Function : Author
Loriane Alonso
Adeline Suchel
Emilie Poletti
  • Function : Author
Jean-Franço Luca
Reda Hayoun
  • Function : Author
Laura Gutierrez
  • Function : Author
Alexandre Vela
  • Function : Author
Romain Bastien
  • Function : Author

Abstract

Successful aquacultural production of juvenile fish requires that the optimal rearing conditions be applied. However, for many fish species, there is a significant knowledge gap concerning these conditions. In this study, we evaluated the effects of stocking density on the survival and growth of brown meagre, Sciaena umbra (L.), during rearing trials in an experimental hatchery. This research forms part of a feasibility project to improve the aquacultural production of brown meagre. Four initial larval density treatments (5, 10, 30, and 70 larvae per L) were established. At 0, 9, 17, 22, and 25 days post-hatching, we measured the total length, coefficient of variation in length, and specific growth rate. The physicochemical water parameters remained at satisfactory levels for fish culture throughout the experiment. Lower densities promoted better growth in terms of total length, specific growth rate, and survival. We observed a significant negative correlation between larval density and length growth/survival. Thus, the low larval density treatment yielded the highest survival (48.5% ± 3.46%), growth in final total length (11.9 ± 1.09 mm), and specific growth rate (5.13% ± 0.39% per day). Increased stocking density therefore negatively affects growth and survival, reduces homogeneity, but increases the production of S. umbra larvae. This study helps identify optimal aquaculture conditions for maximizing the production of juvenile S. umbra for ecological restoration.
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hal-04583962 , version 1 (22-05-2024)

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Rémi Millot, Mikaël Demolliens, Jean-José Filippi, Sally Pugliese, Alban Delmas, et al.. Effect of Stocking Density on Survival and Growth of Brown Meagre Sciaena umbra (L.) Larvae. Fishes, 2024, 9 (6), pp.190. ⟨10.3390/fishes9060190⟩. ⟨hal-04583962⟩
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