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Master Thesis

Effet de l’enrichissement physique sur une polyculture de sandre (Sander lucioperca) et d’esturgeon du Danube (Acipenser ruthenus) en circuit recirculé

Abstract : The physical enrichment is the deliberate addition of physical structures – rock, plant, sand, artificial objects- in the rearing unit to make the environment more suitable for fish in order to potentially improve their growth. The objective of this study is to evaluate the effect of vertically suspended rod arrays and an opaque tank cover on the land use and the growth performance of a polyculture of pikeperch (Sander lucioperca) and sterlet (Acipenser ruthenus) in Recirculating Aquaculture Systems (RAS). After analysis, this type of physical enrichment has significantly affected the land use of the two species but there was no significant difference for the 10 studied zootechnic parameters. Then, this type of enrichment is not an interesting option for fish farmers to improve the rearing performances. This study is the first one in this domain so future studies should evaluate other parameters as experiment’s duration, fish density or using other types of physical enrichment. It could validate or refute the physical enrichment as a solution to improve growth conditions in a polyculture in RAS.
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Master Thesis
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Submitted on : Wednesday, November 20, 2019 - 9:22:26 AM
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Jean-Gabriel Reynaud. Effet de l’enrichissement physique sur une polyculture de sandre (Sander lucioperca) et d’esturgeon du Danube (Acipenser ruthenus) en circuit recirculé. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02371713⟩

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