About


I do research to drive more sustainable use of the coastal marine environment. I’m currently a postdoctoral research fellow splitting my time between the SALTT lab at the University of Melbourne (Australia) and the Animal Welfare research group at the Institute of Marine Research (Norway). I’ve also recently been a visiting researcher at The Nature Conservancy.

Theme 1: Ecologically beneficial aquaculture
Aquaculture modifies coastal marine environments by providing structure and food and altering nutrient dynamics. A better understanding of these effects can help achieve more positive outcomes, mitigate negative impacts, and provide a net enhancement of ecosystem services for coastal communities.
Recent research: Barrett et al. 2022

Theme 2: Fish health in salmon farming
Intensive salmon farming has brings economic benefits, but also problems. Salmon farms amplify pathogens and parasites, especially sea lice. Severe louse outbreaks cause welfare issues in farmed salmon and threaten their relatives in wild (we estimate that around 99% of salmon lice in Norway originate from salmon farms). New methods are needed to prevent, monitor and treat infestations without compromising animal welfare standards.
Recent research: Barrett et al. 2020

Theme 3: Rocky reef ecology, conservation and restoration
Seaweed and kelp habitats are diverse and productive, but have come under threat from multiple stressors including eutrophication, sedimentation and overgrazing. I’m interested in the conservation of seaweed habitats in degraded coastal areas, including the role of invasive macroalgae as surrogate habitat and strategies to manage overabundant sea urchins and allow recovery of kelp ecosystems.
Recent research: Barrett et al. 2019


Publications


  1. Barrett LT, Oldham T, Kristiansen TS, Oppedal F, Stien LH (2022) Declining size-at-harvest in Norwegian salmon aquaculture: lice, disease, and the role of stunboats. Aquaculture. Open access.

  2. Oppedal O, Stien LH, Bui S, Oldham T, Barrett LT (In press) Physical prevention and control of sea lice. Book chapter in: Sea Lice Biology and Control (edited by J Treasurer et al.). 3m Publishing. email for pdf

  3. Wilson S, Fulton C, Graham N, Abesamis R, Berkström C, Coker D, Depczynski M, Evans R, Fisher R, Goetze J, Hoey A, Holmes T, Kulbicki M, Noble M, Robinson J, Bradley M, Åkerlund C, Barrett LT, Birt M, Bucol A, Chacin D, Chong-Seng K, Eggertsen L, Eggertsen M, Ellis D, Leung P; Lam P; van Lier J; Matis P, Pérez-Matus A, Piggott C, Radford B, Tano S, Tinkler P (In Press) The contribution of macroalgal associated fishes to small-scale tropical reef fisheries. Fish and Fisheries. email for pdf

  4. McIntosh P, Barrett LT, Warren-Myers F, Coates A, Macaulay G, Szetey A, Robinson N, White C, Samsing F, Oppedal F, Folkedal O, Klebert P, Dempster T (2022) Supersizing salmon farms in the coastal zone: a global analysis of changes in farm technology and location from 2005 to 2020. Aquaculture. email for pdf

  5. Barrett LT, Theuerkauf SJ, Rose JM, Alleway HK, Bricker SB, Parker M, Petrolia DR, Jones RC (2022) Sustainable growth of non-fed aquaculture can generate valuable ecosystem benefits. Ecosystem Services. Open access.

  6. Swearer SE, Morris RL, Barrett LT, Sievers M, Dempster T, Hale R (2021) An overview of ecological traps in marine ecosystems. Frontiers in Ecology and the Environment. email for pdf

  7. Macaulay G, Warren-Myers F, Barrett LT, Oppedal F, Føre M, Dempster T (2021) Tag use to monitor fish behaviour in aquaculture: a review of benefits, problems, and solutions. Reviews in Aquaculture. email for pdf

  8. Dempster T, Overton K, Bui S, Stien LH, Oppedal F, Karlsen Ø, Coates A, Phillips BL, Barrett LT (2021) Farmed salmonids drive the abundance, ecology and evolution of parasitic salmon lice in Norway. Aquaculture Environment Interactions. Open access.

  9. Theuerkauf SJ, Barrett LT, Alleway HK, Costa-Pierce B, St. Gelais A, Jones R (2021) Habitat value of bivalve shellfish and seaweed aquaculture for fish and invertebrates: pathways, synthesis, next steps. Reviews in Aquaculture. Open access.

  10. Barrett LT, Swearer SE, Dempster T (2020) Native predator limits the capacity of an invasive seastar to exploit a food-rich habitat. Marine Environmental Research. pdf

  11. Barrett LT, Oppedal F, Robinson N, Dempster T (2020) Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture. Reviews in Aquaculture. pdf

  12. Bui S, Geitung L, Oppedal F, Barrett LT (2020) Salmon lice survive the straight shooter: efficacy of laser delousing in commercial sea cages. Preventive Veterinary Medicine. Open access.

  13. Bui S, Oppedal F, Nola V, Barrett LT (2020) Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages. Journal of Fish Diseases. Open access.

  14. Fulton CJ, Berkström C, Wilson SK, Abesamis RA, Bradley M, Åkerlund C, Barrett LT, Bucol AA, Chacin DH, Chong-Seng KM, Coker DJ, Depczynski M, Eggertsen L, Eggertsen M, Ellis D, Evans RD, Graham NAJ, Hoey AS, Holmes TH, Kulbicki M, Leung PTY, Lam PKS, van Lier J, Matis PA, Noble MM, Pérez-Matus A, Piggott C, Radford BT, Tano S, Tinkler P (2020) Macroalgal meadow habitats support fish and fisheries in diverse tropical seascapes. Fish and Fisheries. pdf

  15. Barrett LT, Overton K, Stien LH, Oppedal F, Dempster T (2020) Effect of cleaner fish on sea lice in Norwegian salmon aquaculture: a national scale data analysis. International Journal for Parasitology. pdf

  16. Overton K, Barrett LT, Oppedal F, Kristiansen TS, Dempster T (2020) Sea lice removal by cleaner fish in salmon aquaculture: a review of the evidence base. Aquaculture Environment Interactions. Open access.

  17. Hassell K, Barrett LT, Dempster T (2020) Impacts of human-induced pollution on wild fish welfare. Book chapter in: The Welfare of Fish (edited by T Kristiansen et al.). Springer

  18. Barrett LT, Bui S, Oppedal F, Bardal T, Olsen RE, Dempster T (2020) Ultraviolet-C light suppresses reproduction of sea lice but has adverse effects on host salmon. Aquaculture. pdf

  19. Barrett LT, Pert CG, Bui S, Oppedal F, Dempster T (2020) Sterilization of sea lice eggs with ultraviolet C light: towards a new preventative technique for aquaculture. Pest Management Science. pdf

  20. Barrett LT, Dempster T, Swearer SE (2019) A nonnative habitat-former mitigates native habitat loss for endemic reef fishes. Ecological Applications. pdf

  21. Barrett LT, Swearer SE, Dempster T (2019) Impacts of marine and freshwater aquaculture on wildlife: a global meta-analysis. Reviews in Aquaculture. pdf

  22. Barrett LT, Swearer SE, Harboe T, Karlsen Ø, Meier S, Dempster T (2018) Limited evidence for differential reproductive fitness of wild Atlantic cod in areas of high and low salmon farming density. Aquaculture Environment Interactions. Open access.

  23. Barrett LT, de Lima A, Goetze JS (2018) Evidence of a biomass hotspot for targeted fish species within Namena Marine Reserve, Fiji. Pacific Conservation Biology. pdf

  24. Dempster T, Arechavala-Lopez P, Barrett LT, Fleming IA, Sanchez-Jerez P, Uglem I (2018) Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild. Reviews in Aquaculture. pdf

  25. Barrett LT, Evans JP, Gasparini C (2014) The effects of perceived mating opportunities on patterns of reproductive investment by male guppies. PLoS ONE. Open access.


In the media


Sustainable growth of non-fed aquaculture can generate valuable ecosystem benefits

Wild fish and invertebrates use shellfish and seaweed farms as habitat

Should we be tagging fish for aquaculture research?

Sea lice prevention is better than cure

Automated laser technology doesn’t work yet (in snorkel cages)

Variable and short-lived effects of cleaner fishes when viewed at national scale

The use of cleaner fishes in salmon farming is based on weak evidence

UVC light for sterilisation of sea louse eggs

Recapturing fish that escape from farms does not work: what are the alternatives?

An introduction to ecological traps


Education


2018: PhD | Marine Ecology
University of Melbourne
Habitat preferences and fitness consequences for fauna associated with novel marine environments

2013: BSc (Honours) | Zoology and Marine Biology
University of Western Australia
Effect of expected future mating opportunities on patterns of reproductive investment by male guppies




Page built using a modified template from the postcards package for R.

Luke T Barrett



About


I do research to drive more sustainable use of the coastal marine environment. I’m currently a postdoctoral research fellow splitting my time between the SALTT lab at the University of Melbourne (Australia) and the Animal Welfare research group at the Institute of Marine Research (Norway). I’ve also recently been a visiting researcher at The Nature Conservancy.

Theme 1: Ecologically beneficial aquaculture
Aquaculture modifies coastal marine environments by providing structure and food and altering nutrient dynamics. A better understanding of these effects can help achieve more positive outcomes, mitigate negative impacts, and provide a net enhancement of ecosystem services for coastal communities.
Recent research: Barrett et al. 2022

Theme 2: Fish health in salmon farming
Intensive salmon farming has brings economic benefits, but also problems. Salmon farms amplify pathogens and parasites, especially sea lice. Severe louse outbreaks cause welfare issues in farmed salmon and threaten their relatives in wild (we estimate that around 99% of salmon lice in Norway originate from salmon farms). New methods are needed to prevent, monitor and treat infestations without compromising animal welfare standards.
Recent research: Barrett et al. 2020

Theme 3: Rocky reef ecology, conservation and restoration
Seaweed and kelp habitats are diverse and productive, but have come under threat from multiple stressors including eutrophication, sedimentation and overgrazing. I’m interested in the conservation of seaweed habitats in degraded coastal areas, including the role of invasive macroalgae as surrogate habitat and strategies to manage overabundant sea urchins and allow recovery of kelp ecosystems.
Recent research: Barrett et al. 2019


Publications


  1. Barrett LT, Oldham T, Kristiansen TS, Oppedal F, Stien LH (2022) Declining size-at-harvest in Norwegian salmon aquaculture: lice, disease, and the role of stunboats. Aquaculture. Open access.

  2. Oppedal O, Stien LH, Bui S, Oldham T, Barrett LT (In press) Physical prevention and control of sea lice. Book chapter in: Sea Lice Biology and Control (edited by J Treasurer et al.). 3m Publishing. email for pdf

  3. Wilson S, Fulton C, Graham N, Abesamis R, Berkström C, Coker D, Depczynski M, Evans R, Fisher R, Goetze J, Hoey A, Holmes T, Kulbicki M, Noble M, Robinson J, Bradley M, Åkerlund C, Barrett LT, Birt M, Bucol A, Chacin D, Chong-Seng K, Eggertsen L, Eggertsen M, Ellis D, Leung P; Lam P; van Lier J; Matis P, Pérez-Matus A, Piggott C, Radford B, Tano S, Tinkler P (In Press) The contribution of macroalgal associated fishes to small-scale tropical reef fisheries. Fish and Fisheries. email for pdf

  4. McIntosh P, Barrett LT, Warren-Myers F, Coates A, Macaulay G, Szetey A, Robinson N, White C, Samsing F, Oppedal F, Folkedal O, Klebert P, Dempster T (2022) Supersizing salmon farms in the coastal zone: a global analysis of changes in farm technology and location from 2005 to 2020. Aquaculture. email for pdf

  5. Barrett LT, Theuerkauf SJ, Rose JM, Alleway HK, Bricker SB, Parker M, Petrolia DR, Jones RC (2022) Sustainable growth of non-fed aquaculture can generate valuable ecosystem benefits. Ecosystem Services. Open access.

  6. Swearer SE, Morris RL, Barrett LT, Sievers M, Dempster T, Hale R (2021) An overview of ecological traps in marine ecosystems. Frontiers in Ecology and the Environment. email for pdf

  7. Macaulay G, Warren-Myers F, Barrett LT, Oppedal F, Føre M, Dempster T (2021) Tag use to monitor fish behaviour in aquaculture: a review of benefits, problems, and solutions. Reviews in Aquaculture. email for pdf

  8. Dempster T, Overton K, Bui S, Stien LH, Oppedal F, Karlsen Ø, Coates A, Phillips BL, Barrett LT (2021) Farmed salmonids drive the abundance, ecology and evolution of parasitic salmon lice in Norway. Aquaculture Environment Interactions. Open access.

  9. Theuerkauf SJ, Barrett LT, Alleway HK, Costa-Pierce B, St. Gelais A, Jones R (2021) Habitat value of bivalve shellfish and seaweed aquaculture for fish and invertebrates: pathways, synthesis, next steps. Reviews in Aquaculture. Open access.

  10. Barrett LT, Swearer SE, Dempster T (2020) Native predator limits the capacity of an invasive seastar to exploit a food-rich habitat. Marine Environmental Research. pdf

  11. Barrett LT, Oppedal F, Robinson N, Dempster T (2020) Prevention not cure: a review of methods to avoid sea lice infestations in salmon aquaculture. Reviews in Aquaculture. pdf

  12. Bui S, Geitung L, Oppedal F, Barrett LT (2020) Salmon lice survive the straight shooter: efficacy of laser delousing in commercial sea cages. Preventive Veterinary Medicine. Open access.

  13. Bui S, Oppedal F, Nola V, Barrett LT (2020) Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages. Journal of Fish Diseases. Open access.

  14. Fulton CJ, Berkström C, Wilson SK, Abesamis RA, Bradley M, Åkerlund C, Barrett LT, Bucol AA, Chacin DH, Chong-Seng KM, Coker DJ, Depczynski M, Eggertsen L, Eggertsen M, Ellis D, Evans RD, Graham NAJ, Hoey AS, Holmes TH, Kulbicki M, Leung PTY, Lam PKS, van Lier J, Matis PA, Noble MM, Pérez-Matus A, Piggott C, Radford BT, Tano S, Tinkler P (2020) Macroalgal meadow habitats support fish and fisheries in diverse tropical seascapes. Fish and Fisheries. pdf

  15. Barrett LT, Overton K, Stien LH, Oppedal F, Dempster T (2020) Effect of cleaner fish on sea lice in Norwegian salmon aquaculture: a national scale data analysis. International Journal for Parasitology. pdf

  16. Overton K, Barrett LT, Oppedal F, Kristiansen TS, Dempster T (2020) Sea lice removal by cleaner fish in salmon aquaculture: a review of the evidence base. Aquaculture Environment Interactions. Open access.

  17. Hassell K, Barrett LT, Dempster T (2020) Impacts of human-induced pollution on wild fish welfare. Book chapter in: The Welfare of Fish (edited by T Kristiansen et al.). Springer

  18. Barrett LT, Bui S, Oppedal F, Bardal T, Olsen RE, Dempster T (2020) Ultraviolet-C light suppresses reproduction of sea lice but has adverse effects on host salmon. Aquaculture. pdf

  19. Barrett LT, Pert CG, Bui S, Oppedal F, Dempster T (2020) Sterilization of sea lice eggs with ultraviolet C light: towards a new preventative technique for aquaculture. Pest Management Science. pdf

  20. Barrett LT, Dempster T, Swearer SE (2019) A nonnative habitat-former mitigates native habitat loss for endemic reef fishes. Ecological Applications. pdf

  21. Barrett LT, Swearer SE, Dempster T (2019) Impacts of marine and freshwater aquaculture on wildlife: a global meta-analysis. Reviews in Aquaculture. pdf

  22. Barrett LT, Swearer SE, Harboe T, Karlsen Ø, Meier S, Dempster T (2018) Limited evidence for differential reproductive fitness of wild Atlantic cod in areas of high and low salmon farming density. Aquaculture Environment Interactions. Open access.

  23. Barrett LT, de Lima A, Goetze JS (2018) Evidence of a biomass hotspot for targeted fish species within Namena Marine Reserve, Fiji. Pacific Conservation Biology. pdf

  24. Dempster T, Arechavala-Lopez P, Barrett LT, Fleming IA, Sanchez-Jerez P, Uglem I (2018) Recapturing escaped fish from marine aquaculture is largely unsuccessful: alternatives to reduce the number of escapees in the wild. Reviews in Aquaculture. pdf

  25. Barrett LT, Evans JP, Gasparini C (2014) The effects of perceived mating opportunities on patterns of reproductive investment by male guppies. PLoS ONE. Open access.


In the media


Sustainable growth of non-fed aquaculture can generate valuable ecosystem benefits

Wild fish and invertebrates use shellfish and seaweed farms as habitat

Should we be tagging fish for aquaculture research?

Sea lice prevention is better than cure

Automated laser technology doesn’t work yet (in snorkel cages)

Variable and short-lived effects of cleaner fishes when viewed at national scale

The use of cleaner fishes in salmon farming is based on weak evidence

UVC light for sterilisation of sea louse eggs

Recapturing fish that escape from farms does not work: what are the alternatives?

An introduction to ecological traps


Education


2018: PhD | Marine Ecology
University of Melbourne
Habitat preferences and fitness consequences for fauna associated with novel marine environments

2013: BSc (Honours) | Zoology and Marine Biology
University of Western Australia
Effect of expected future mating opportunities on patterns of reproductive investment by male guppies




Page built using a modified template from the postcards package for R.