Browsing Bergen Open Research Archive by Author "Reynolds, Patrick"
Now showing items 1-16 of 16
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Causes of Mortality and Loss of Lumpfish Cyclopterus lumpus
Reynolds, Patrick; Imsland, Albert; Boissonnot, Lauris Jeannine Ernestine (Journal article; Peer reviewed, 2022)Data from research and commercial use of lumpfish were collected from the research facilities of Gifas (Inndyr, Northern Norway, 67.0° N, 14.0° E). The data were sourced from 12 main lumpfish groups subdivided into 66 ... -
Comparison of diet composition, feeding, growth and health of lumpfish (Cyclopterus lumpus L.) fed either feed blocks or pelleted commercial feed
Imsland, Albert; Reynolds, Patrick; Jonassen, Thor Magne; Hangstad, Thor Arne; Adron, John; Elvegård, Tor Anders; Urskog, Tonje Cecilie; Hanssen, Anna; Mikalsen, Bjørn (Peer reviewed; Journal article, 2019)Two duplicate groups of individually tagged lumpfish (mean initial weight: 21.5 ± 3.2 g) were fed either a commercially available lumpfish feed or feed blocks for a period of 123 days. The aim was to evaluate and compare ... -
Comparison of diet composition, feeding, growth and health of lumpfish (Cyclopterus lumpus L.) fed either feed blocks or pelleted commercial feed
Imsland, Albert; Reynolds, Patrick; Jonassen, Thor Magne; Hangstad, Thor Arne; Adron, John; Elvegård, Tor Anders; Urskog, Tonje Cecilie; Hanssen, Anna; Mikalsen, Bjørn (Peer reviewed; Journal article, 2019)Two duplicate groups of individually tagged lumpfish (mean initial weight: 21.5 ± 3.2 g) were fed either a commercially available lumpfish feed or feed blocks for a period of 123 days. The aim was to evaluate and compare ... -
Consumption of sea lice by lumpfish (Cyclopterus lumpus): qPCR quantification and use of a non-destructive sampling method
Imsland, Albert; Micallef, Giulia; Korsnes, Kjetil; Reynolds, Patrick (Peer reviewed; Journal article, 2019)In the present study, it was attempted to quantify sea lice grazing in lumpfish by using a recently published qPCR assay. This method utilizes a small aliquot (10 μL) of the stomach fluid of the lumpfish which can be ... -
Effects of different feeding frequencies on growth, cataract development and histopathology of lumpfish (Cyclopterus lumpus L.)
Imsland, Albert; Reynolds, Patrick; Jonassen, Thor Magne; Hangstad, Thor Arne; Elvegård, Tor Anders; Urskog, Tonje Cecilie; Hanssen, Anna; Mikalsen, Bjørn (Peer reviewed; Journal article, 2019)Three duplicate groups of individually tagged lumpfish (mean initial weight: 22.3 ± 2.5 g) were fed either daily (7DW); four days per week (4DW) or three days per week (3DW) at a feeding rate of 2% body weight day−1 for a ... -
Effects of different feeding regimes on growth, cataract development, welfare, and histopathology of lumpfish (Cyclopterus lumpus L.)
Imsland, Albert; Reynolds, Patrick; Boissonnot, Lauris Jeannine Ernestine (Journal article; Peer reviewed, 2024)To develop specific recommendations on the feeding strategies for farmed lumpfish, four duplicate groups (n = 70; N = 280) of lumpfish with a mean ± SD start weight of 30.4 ± 5.3 g were distributed among eight sea cages ... -
Exploring the effects of acute stress exposure on lumpfish plasma and liver biomarkers
Lopes, Tiago; Costas, Benjamín; Ramos-Pinto, Lourenço; Reynolds, Patrick; Imsland, Albert; Fernandes, Jorge Manuel de Oliveira (Journal article; Peer reviewed, 2023-11-23)This study aimed to expand knowledge on lumpfish stress physiology by investigating the effects of acute stress on primary (i.e., cortisol) and secondary (e.g., metabolites) stress responses, as well as oxidative stress ... -
Genomic Signatures of Local Adaptation under High Gene Flow in Lumpfish—Implications for Broodstock Provenance Sourcing and Larval Production
Maduna, Simo; Jónsdóttir, Ólöf Dóra Bartels; Imsland, Albert; Gíslason, Davíð; Reynolds, Patrick; Kapari, Lauri Teemu; Hangstad, Thor Arne; Meier, Kristian; Hagen, Snorre (Journal article; Peer reviewed, 2023-09-26)Aquaculture of the lumpfish (Cyclopterus lumpus L.) has become a large, lucrative industry owing to the escalating demand for “cleaner fish” to minimise sea lice infestations in Atlantic salmon mariculture farms. We used ... -
In lumpfish We Trust? The Efficacy of Lumpfish Cyclopterus lumpus to Control Lepeophtheirus salmonis Infestations on Farmed Atlantic Salmon: A Review
Imsland, Albert; Reynolds, Patrick (Journal article; Peer reviewed, 2022)In this review, we have systematized current knowledge about the effect of stocking lumpfish (Cyclopterus lumpus) as cleaner fish to control Lepeophtheirus salmonis infestations on farmed Atlantic salmon (Salmo salar L.). ... -
Lack of population genetic structure of lumpfish along the Norwegian coast: A reappraisal based on EST-STRs analyses
Jónsdóttir, Ólöf Dóra Bartels; Gíslason, Davíð; Ólafsdóttir, Guðbjörg; Maduna, Simo; Hagen, Snorre; Reynolds, Patrick; Sveinsson, Sæmundur; Imsland, Albert (Journal article; Peer reviewed, 2022)Lumpfish is now the single most important cleaner fish species to date and there is an extensive lumpfish translocation along the Norwegian coast. A reliable baseline information about the population genetic structure of ... -
Lumpfish physiological response to chronic stress
Lopes, Tiago; Costas, Benjamín; Ramos-Pinto, Lourenço; Reynolds, Patrick; Imsland, Albert; Aragao, Claudia; Fernandes, Jorge Manuel de Oliveira (Journal article; Peer reviewed, 2024)In this study, we explored the effects of chronic stress on lumpfish (Cyclopterus lumpus) physiological, immune response, health, and plasma free amino acids. 3 groups of lumpfish were exposed to 1-minute air exposure. 1 ... -
Possible use of lumpfish to control Caligus elongatus infestation on farmed Atlantic salmon: A mini review
Imsland, Albert; Remen, Mette; Bloch-hansen, karin; Sagerup, Kjetil; Mathisen, Remi; Myklebust, Elisabeth A.; Reynolds, Patrick (Journal article; Peer reviewed, 2020)In this mini review, we systematized current knowledge about the number of Caligus elongatus on farmed Atlantic salmon in relation to the use of lumpfish as cleaner fish. The review was prompted by reports of an unusually ... -
Quantification of grazing efficacy, growth and health score of different lumpfish (Cyclopterus lumpus L.) families: possible size and gender effects
Imsland, Albert; Reynolds, Patrick; Hangstad, Thor Arne; Kapari, Lauri Teemu; Maduna, Simo; Hagen, Snorre B.; Jónsdóttir, Ólöf Dóra Bartels; Spetland, Frank; Lindberg, Ken Ståle (Journal article; Peer reviewed, 2021)To investigate the possible family influence on sea lice grazing of lumpfish on Atlantic salmon, ten families of lumpfish (N = 480) with a mean (± SD) weight of 54.8 ± 9.2 g were distributed among ten sea cages (5 × 5 × 5 ... -
Temperature and size-dependency of lumpfish (Cyclopterus lumpus) oxygen requirement and tolerance
Remen, Mette; Nes, Armand Moe; Hangstad, Thor Arne; Geraudie, Perrine; Reynolds, Patrick; Urskog, Tonje Cecilie; Hanssen, Anna; Stefansson, Sigurd Olav; Imsland, Albert (Journal article; Peer reviewed, 2022)Lumpfish are currently produced and utilized as cleaner fish, to control sea lice infestation rates in salmon net pens, but information on environmental requirements is still limited. This study aimed to determine the zone ... -
Towards better lumpfish: Changes in size variation, cataract development, behaviour and sea lice grazing through selective breeding
Imsland, Albert; Reynolds, Patrick; Kapari, Lauri Teemu; Maduna, Simo; Hagen, Snorre; Hanssen, Anne; Jónsdóttir, Ólöf Dóra Bartels (Journal article; Peer reviewed, 2024)The aim of this study was to evaluate whether sea lice grazing efficiency, behaviour, size variation and cataract development can be improved through selective breeding of lumpfish. A series of studies was conducted over ... -
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus
Imsland, Albert; Hangstad, Thor Arne; Jonassen, Thor Magne; Stefansson, Sigurd Olav; Nilsen, Tom Ole; Hovgaard, Peter; Elvegård, Tor Anders; Lindberg, Ken Ståle; Mikalsen, Bjørn; Urskog, Tonje Cecilie; Norberg, Birgitta; Andersson, Eva; Spetland, Frank; Reynolds, Patrick (Peer reviewed; Journal article, 2019)In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January 2017 to July 2018. One group was reared under simulated natural ...