Less is more: Negative relationship between biomass density and sea lice infestation in marine salmon farmin

Nathalie Walraven; Anne  Stene; Helene Børretyen Fjørtoft

doi:10.1016/j.aquaculture.2021.736602

Less is more: Negative relationship between biomass density and sea lice infestation in marine salmon farmin

Nathalie Walraven, Anne Stene, Helene Børretyen Fjørtoft

Norwegian University of Science and Technology (NTNU)

Research output: Contribution to journal › Article › peer-review

Abstract

The relationship between biomass density and sea lice infestation is of particular interest in marine salmonid aquaculture. Data from a commercial fish farmer with parallel production of both organic and conventional salmon at the same site made it possible to study aspects of this relationship in a field situation. The maximum allowed biomass density for organically produced salmon is 10 kg/m³ and 25 kg/m³ for conventionally produced salmon. The focus of this study was to compare sea lice infestation on salmon in the two productions types and related biomass densities synchronously. Organic salmon had significantly higher levels of sea lice compared to salmon in conventional production. Mortality rate and growth rate were not significantly different between the production strategies.

Original language	English (Ireland)
Article number	736602
Journal	Aquaculture
Volume	539
DOIs	https://doi.org/10.1016/j.aquaculture.2021.736602
Publication status	Published - 30 Jun 2021
Externally published	Yes

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10.1016/j.aquaculture.2021.736602

Cite this

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title = "Less is more: Negative relationship between biomass density and sea lice infestation in marine salmon farmin",

abstract = "The relationship between biomass density and sea lice infestation is of particular interest in marine salmonid aquaculture. Data from a commercial fish farmer with parallel production of both organic and conventional salmon at the same site made it possible to study aspects of this relationship in a field situation. The maximum allowed biomass density for organically produced salmon is 10 kg/m3 and 25 kg/m3 for conventionally produced salmon. The focus of this study was to compare sea lice infestation on salmon in the two productions types and related biomass densities synchronously. Organic salmon had significantly higher levels of sea lice compared to salmon in conventional production. Mortality rate and growth rate were not significantly different between the production strategies.",

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