Comparison of DNA metabarcoding and morphological diet analysis of lumpfish (Cyclopterus lumpus) as methods of estimating sea lice cleaning efficacy inside commercial Atlantic salmon (Salmo salar) sea cages

Roy, Jessica L.; Boulding, Elizabeth G.

doi:10.1016/j.aquaculture.2024.740817

Aquaculture

2024

DOI: 10.1016/j.aquaculture.2024.740817

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Comparison of DNA metabarcoding and morphological diet analysis of lumpfish (Cyclopterus lumpus) as methods of estimating sea lice cleaning efficacy inside commercial Atlantic salmon (Salmo salar) sea cages

Jessica L. Roy,

Elizabeth G. Boulding

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Heterogeneous Weight Development of Lumpfish (Cyclopterus lumpus) Used as Cleaner Fish in Atlantic Salmon (Salmo salar) Farming

Engebretsen,

Aldrin,

Staven

et al. 2024

Fishes

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Lumpfish (Cyclopterus lumpus) are used as cleaner fish in Atlantic salmon (Salmo salar) aquaculture as one of multiple control measures against salmon lice (Lepeophtheirus salmonis). Numerous studies have documented weight as an important factor for characterising the cleaning efficacy of individual lumpfish. Hence, the efficacy of lumpfish in fish farms depends on the size at stocking and the weight development over time. Here, we aimed to quantify how weight developed over time for lumpfish deployed in salmon farming sea cages in Norway through modelling the daily growth rate. We found that the coefficient of variation for lumpfish weight increased over time, implying that the standard deviation increased more than the expected weight. The data thus showed heterogeneous growth for lumpfish in salmon farming cages, where some individuals exhibited no apparent growth, and others significant proliferation. We found that the daily growth rate was best described as bell-shaped functions of weight and temperature, consistent with a sigmoid-shaped growth curve and an optimal temperature around 10 °C. These results allow for more realistic modelling of the efficacy of lumpfish in controlling salmon lice in fish farms, as one can combine estimates of weight-dependent cleaning efficacy with weight development over time.

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Heterogeneous Weight Development of Lumpfish (Cyclopterus lumpus) Used as Cleaner Fish in Atlantic Salmon (Salmo salar) Farming

Engebretsen,

Aldrin,

Staven

et al. 2024

Fishes

View full text Add to dashboard Cite

show abstract

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Comparison of DNA metabarcoding and morphological diet analysis of lumpfish (Cyclopterus lumpus) as methods of estimating sea lice cleaning efficacy inside commercial Atlantic salmon (Salmo salar) sea cages

Cited by 1 publication

References 47 publications

Heterogeneous Weight Development of Lumpfish (Cyclopterus lumpus) Used as Cleaner Fish in Atlantic Salmon (Salmo salar) Farming

Heterogeneous Weight Development of Lumpfish (Cyclopterus lumpus) Used as Cleaner Fish in Atlantic Salmon (Salmo salar) Farming

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