The use of lumpfish (Cyclopterus lumpus L.) to control sea lice (Lepeophtheirus salmonis Krøyer) infestations in intensively farmed Atlantic salmon (Salmo salar L.)

Imsland, Albert K.; Reynolds, Patrick; Eliassen, Gerhard; Hangstad, Thor Arne; Foss, Atle; Vikingstad, Erik; Elvegård, Tor Anders

doi:10.1016/j.aquaculture.2013.12.033

Cited by 195 publications

(132 citation statements)

References 12 publications

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“…Lumpfish Cyclopterus lumpus L. 1758 is an ocean fish that relies on a healthy visual system for fitness, to hunt prey, or, in the case of aquaculture, to see and eat pelleted aquaculture diets. Cyclopterus lumpus eggs are harvested for human consumption and C. lumpus have more recently been used as a biological delousing agent in aquaculture (Imsland et al ., ). Post‐hatch C. lumpus are visually guided predators and feed on shrimp, crustaceans, jellyfish, worms and other fish (Ingólfsson et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Novel characteristics of the cultured Lumpfish Cyclopterus lumpus eye during post‐hatch larval and juvenile developmental stages

Ahmad

Paradis

Boyce

et al. 2019

Journal of Fish Biology

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We systematically analysed the characteristics of the Cyclopterus lumpus eye and retina during cultured post‐hatch developmental stages using gross observations, histology, immunohistochemistry, microscopy, fundus imaging and spectral domain optical coherence tomography retinal imaging. Post‐hatch developing cultured C. lumpus eye and retinal tissues share a number of features typically conserved in other teleost fish. However, cultured C. lumpus possess some novel ocular and retinal features different from previous descriptions of other teleosts, including a prominent retractor lentis pigmented tissue closely associated with the vascular rete mirabile, peripherally located lobes of separate retinal tissue containing proliferative cells, extensive tapetum material of varying thickness, prominent fundus stripes and an elongated rod‐shaped optic nerve stalk. Post‐hatch developing cultured C. lumpus also developmentally regulate a protein homologous to alpha smooth‐muscle actin in strikingly dense continuous bands in the plexiform layers of the retina. The novel features of the eye and retina of cultured C. lumpus described here could contribute to our understanding of fitness and survival of C. lumpus in a widely ranging habitat.

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Section: Introductionmentioning

confidence: 99%

Novel characteristics of the cultured Lumpfish Cyclopterus lumpus eye during post‐hatch larval and juvenile developmental stages

Ahmad

Paradis

Boyce

et al. 2019

Journal of Fish Biology

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“…Lumpfish ( Cyclopterus lumpus L ) are emerging as a commercially relevant ocean fish species for use as cleaner fish for delousing farmed Atlantic salmon ( Salmo salar L ) and as a source of roe for human consumption (Imsland et al, ; Powell et al, ). Lumpfish require a healthy visual system in both wild and cultured habitats.…”

Section: Introductionmentioning

confidence: 99%

Ocular tissue changes associated with anterior segment opacity in lumpfish (Cyclopterus lumpus L) eye

Paradis

Ahmad

McDonald

et al. 2019

Journal of Fish Diseases

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Lumpfish use their vision to hunt prey or, in the case of aquaculture, to see and eat pelleted diets. A common anterior ocular opacity abnormality designated in the literature as “cataract” described in both farmed and wild lumpfish has not yet been characterized in detail at the pathobiological level. We describe here lens tissue changes associated with cataract in cultured and domesticated lumpfish. Methodology included gross observations, ophthalmoscopy and histology. Young adult cultured animals approaching 400 days post‐hatch presented a range of anterior segment opacities associated with lenticular abnormalities observable at a histological level. Wild aged domesticated animals also displayed cataracts characterized mainly by abnormalities of the lens observed by both ophthalmoscopy and histology. Dysplastic lesions of the lens in one aged domesticated lumpfish were accompanied with both retinal and optic nerve degeneration. These novel naturally occurring anatomical changes in lumpfish present both commonalities and unique features associated with cataract in young adult cultured animals versus aged domesticated broodstock animals.

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“…Lice skirts are perhaps the most common of several technological adaptions aimed at limiting contact between salmon and infestive copepodites in the upper water column, and several studies show reduction of salmon lice on salmon when the method is used (Grøntvedt & Kristoffersen, ; Stien et al, ; Stien, Lind, Oppedal, Wright, & Seternes, ). Rearing cleaner fish together with salmon is also reported to reduce the salmon lice numbers on salmon (Imsland et al, ). Two groups of cleaner fish are used in Norway: wrasse ( Labridae spp) and lumpfish (C yclopterus lumpus Linnaeus, 1758).…”

Section: Introductionmentioning

confidence: 99%

How are the salmon lice (Lepeophtheirus salmonis Krøyer, 1837) in Atlantic salmon farming affected by different control efforts: A case study of an intensive production area with coordinated production cycles and changing delousing practices in 2013–2018

Jevne

Reitan

2019

Journal of Fish Diseases

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The aims of the present study were to describe the salmon lice (Lepeophtheirus salmonis Krøyer, 1837) situation in an intensive salmon production area in mid‐Norway and to consider implications of changing practices of how salmon lice infestation can be controlled. The results in this study suggest that there are steps that can be carried out to keep salmon lice under control even during years when the temperature facilitates a quick salmon lice development. The present work indicates that the use of cleaner fish can delay the time it takes adult female lice to reach 0.1 per salmon in the beginning of a production cycle. It suggests that the timing of cleaner fish deployment into salmon cages can influence its effectiveness in controlling salmon lice. It also gives caution to letting salmon lice develop unchecked, even at levels far below the current lice limit, because of the difficulties to control salmon lice when the external infection pressure is too high. This study took place during a rapid change in delousing methods, in an area with coordinated salmon production. Despite its exploratory nature, this study offers insights into the salmon lice fluctuations in relation to efforts aimed at controlling it.

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The use of lumpfish (Cyclopterus lumpus L.) to control sea lice (Lepeophtheirus salmonis Krøyer) infestations in intensively farmed Atlantic salmon (Salmo salar L.)

Cited by 195 publications

References 12 publications

Novel characteristics of the cultured Lumpfish Cyclopterus lumpus eye during post‐hatch larval and juvenile developmental stages

Novel characteristics of the cultured Lumpfish Cyclopterus lumpus eye during post‐hatch larval and juvenile developmental stages

Ocular tissue changes associated with anterior segment opacity in lumpfish (Cyclopterus lumpus L) eye

How are the salmon lice (Lepeophtheirus salmonis Krøyer, 1837) in Atlantic salmon farming affected by different control efforts: A case study of an intensive production area with coordinated production cycles and changing delousing practices in 2013–2018

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