Skip to main content Accessibility help
×
Home

Artificial light improves escapement of fish from a trawl net

  • Lucy K. Southworth (a1), Frances C. Ratcliffe (a1) (a2), Isobel S. M. Bloor (a1), Jack Emmerson (a1), Dan Watson (a3), David Beard (a4) and Michel J. Kaiser (a1) (a5)...

Abstract

The elimination of unwanted catch in mixed species fisheries is technically challenging given the complexity of fish behaviour within nets. Most approaches to date have employed technologies that modify the nets themselves or use physical sorting grids within the gear. There is currently increasing interest in the use of artificial light to either deter fish from entering the net, or to enhance their escapement from within the net. Here, we evaluated the differences in catch retained in a standard otter trawl, relative to the same gear fitted with a square mesh panel, or a square mesh panel fitted with LEDs. We found that the selectivity of the gear differed depending on water depth. When using a square mesh panel in shallow depths of 29–40 m the unwanted bycatch of whiting and haddock was reduced by 86% and 58% respectively. In deep, darker water (45–95 m), no change in catch was observed in the square-mesh panel treatment, however when LEDs were added to the square-mesh panel, haddock and flatfish catches were reduced by 47% and 25% respectively. These findings demonstrate the potential to improve the performance of bycatch reduction devices through the addition of light devices to enhance selectivity. The results also highlight species-specific and site-specific differences in the performance of bycatch reduction devices, and hence a more adaptive approach to reduce bycatch is probably required to maximize performance.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Artificial light improves escapement of fish from a trawl net
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Artificial light improves escapement of fish from a trawl net
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Artificial light improves escapement of fish from a trawl net
      Available formats
      ×

Copyright

Corresponding author

Author for correspondence: Lucy K. Southworth, E-mail: lucy.k.southworth@gmail.com

References

Hide All
Ben-Yami, M (1976) Fishing with Light. Farnham: Fishing News Books [for] the Food and Agriculture Organization of the United Nations.
Boyle, K, Kaiser, MJ, Thompson, S, Murray, LG and Duncan, PF (2016) Spatial variation in fish and invertebrate bycatches in a scallop trawl fishery. Journal of Shellfish Research 35, 19.
Brčić, J, Herrmann, B and Sala, A (2016) Can a square-mesh panel inserted in front of the codend improve the exploitation pattern in Mediterranean bottom trawl fisheries? Fisheries Research 183, 1318.
Broadhurst, MK (2000) Modifications to reduce bycatch in prawn trawls: a review and framework for development. Reviews in Fish Biology and Fisheries 10, 2760.
Broadhurst, MK and Kennelly, S (1996) Effects of the circumference of codends and a new design of square-mesh panel in reducing unwanted by-catch in the New South Wales oceanic prawn-trawl fishery, Australia. Fisheries Research 27, 203214.
Broadhurst, MK, Kennelly, SJ and Gray, CA (2002) Optimal positioning and design of behavioural-type by-catch reduction devices involving square-mesh panels in penaeid prawn-trawl codends. Marine and Freshwater Research 53, 813823.
Burnham, KP and Anderson, DR (2002) Model Selection and Multimodel Inference. Berlin: Springer.
Campbell, R, Harcus, T, Weirman, D, Fryer, RJ, Kynoch, RJ and Neill, FGO (2010) The reduction of cod discards by inserting 300 mm diamond mesh netting in the forward sections of a trawl gear. Fisheries Research 102, 221226.
Catchpole, TL, Frid, CLJ and Gray, TS (2005) Discards in North Sea fisheries: causes, consequences and solutions. Marine Policy 29, 421430.
Clarke, KR and Warwick, RM (1994) An approach to statistical analysis and interpretation. Change in Marine Communities 6.16.26.
Courtney, AJ, Campbell, MJ, Roy, DP, Tonks, ML, Chilcott, KE and Kyne, PM (2008) Round scallops and square meshes: a comparison of four codend types on the catch rates of target species and by-catch in the Queensland (Australia) saucer scallop (Amusium balloti) trawl fishery. Marine and Freshwater Research 59, 849864.
EC (2013) Regulation (EU) No. 1380/2013 of the European Parliament and of the Council of 11 December 2013 on the Common Fisheries Policy, amending Council Regulations (EC) No 1954/2003 and (EC) No 1224/2009 and repealing Council Regulations (EC) No 2371/2002 and (EC) No 639/2004 and Council Decision 2004/585/EC Official Journal of the European Union L 354, 40.
EC (2018) Commission Delegated Regulation (EU) 2018/2034 of 18 October 2018 establishing a discard plan for certain demersal fisheries in North-Western waters for the period 2019–2021. Official Journal of the European Union L 327/8.
Elliott, S and Catchpole, T (2015) Trawl light. A scoping study. Centre for Environment Fisheries and Aquaculture Science, 132.
Ferro, RST, Jones, EG, Kynoch, RJ, Fryer, RJ and Buckett, BE (2007) Separating species using a horizontal panel in the Scottish North Sea whitefish trawl fishery. ICES Journal of Marine Science 64, 15431550.
Fryer, RJ, O'Neill, FG and Edridge, A (2016) A meta-analysis of haddock size-selection data. Fish and Fisheries 17, 358374.
Gilman, E, Passfield, K and Nakamura, K (2014) Performance of regional fisheries management organizations: ecosystem-based governance of bycatch and discards. Fish and Fisheries 15, 327351.
Glass, CW and Wardle, CS (1989) Comparison of the reactions of fish to a trawl gear, at high and low light intensities. Fisheries Research 7, 249266.
Graham, N, Kynoch, RJ and Fryer, RJ (2003) Square mesh panels in demersal trawls: further data relating haddock and whiting selectivity to panel position. Fisheries Research 62, 361375.
Grimaldo, E, Larsen, RB and Holst, R (2007) Exit windows as an alternative selective system for the Barents Sea demersal fishery for cod and haddock. Fisheries Research 85, 295305.
Grimaldo, E, Sisitiaga, M, Herrmann, B, Larsen, RB, Brinkhof, J and Tatone, I (2017) Improving release efficiency of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Barents Sea demersal trawl fishery by stimulating escape behaviour. Canadian Journal of Fisheries and Aquatic Sciences 75, 402416.
Hannah, RW, Lomeli, MJM and Jones, SA (2015) Tests of artificial light for bycatch reduction in an ocean shrimp (Pandalus jordani) trawl: strong but opposite effects at the footrope and near the bycatch reduction device. Fisheries Research 170, 6067.
Herrmann, B, Wienbeck, H, Karlsen, JD, Stepputtis, D, Dahmn, E and Moderhak, W (2015) Understanding the release efficiency of Atlantic cod (Gadus morhua) from trawls with a square mesh panel: effects of panel area, panel position, and stimulation of escape response. ICES Journal of Marine Science 72, 686696.
Kelleher, K (2005) Discards in the world'S marine fisheries: an update. FAO Fisheries Technical Paper 470, 131.
Kim, YH and Wardle, CS (1998) Measuring the brightness contrast of fishing gear, the visual stimulus for fish capture. Fisheries Research 34, 151164.
Krag, LA, Holst, R and Madsen, N (2009) The vertical separation of fish in the aft end of a demersal trawl. ICES Journal of Marine Science 66, 772777.
Lajeunesse, MJ (2011) On the meta-analysis of response ratios for studies with correlated and multi-group designs. Ecological Society of America 92, 20492055.
Larsen, RB, Herrmann, B, Sistiaga, M, Brinkhof, J, Tatone, I and Langård, L (2017) Performance of the Nordmøre grid in shrimp trawling and potential effects of guiding funnel length and light stimulation. Marine and Coastal Fisheries 9, 479492.
Larsen, RB, Herrmann, B, Sistiaga, M, Brinkhof, J and Grimaldo, E (2018) Bycatch reduction in the Norwegian deep-water shrimp (Pandalus borealis) fishery with a double grid selection system. Fisheries Research 208, 267273.
Lomeli, MJM and Wakefield, WW (2012) Efforts to reduce Chinook salmon (Oncorhynchus tshawytscha) and rockfish (Sebastes spp.) bycatch in the U.S. west coast Pacific hake (Merluccius productus) fishery. Fisheries Research 119, 128132.
Lomeli, MJM and Wakefield, WW (2014) Examining the potential use of artificial illumination to enhance chinook salmon escapement out a bycatch reduction device in a Pacific hake midwater trawl. NMFS Northwest Fisheries Science Center Report, 15.
Lomeli, MJM, Wakefield, WW and Herrmann, B (2018 a) Illuminating the headrope of a selective flatfish trawl: effect on catches of groundfishes, including Pacific halibut. Marine and Coastal Fisheries 10, 118131.
Lomeli, MJM, Groth, SD, Blume, MTO, Herrmann, B and Wakefield, WW (2018 b) Effects on the bycatch of eulachon and juvenile groundfish by altering the level of artificial illumination along an ocean shrimp trawl fishing line. ICES Journal of Marine Science 75, 22242234.
Mangel, JC, Wang, J, Alfaro-, J, Pingo, S, Jimenez, A, Swimmer, Y and Godley, BJ (2018) Illuminating gillnets to save seabirds and the potential for multi-taxa bycatch mitigation. Royal Society Open Science 5, 47.
Marchesan, M, Spoto, M, Verginella, L and Ferrero, EA (2005) Behavioural effects of artificial light on fish species of commercial interest. Fisheries Research 73, 171185.
Melli, V, Krag, LA, Herrmann, B and Karlsen, JD (2018) Investigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fishery. ICES Journal of Marine Science 75, 16821692.
Michalsen, K, Godo, OR and Ferno, A (1996) Diel variation in the catchability of gadoids and its influence on the reliability of abundance indices. ICES Journal of Marine Science 53, 389395.
Milliken, HO and DeAlteris, JT (2004) Evaluation of a large-mesh panel to reduce the flatfish bycatch in the small-mesh bottom trawls used in the New England silver hake fishery. North American Journal of Fisheries Management 24, 2032.
Miranda, LE (2007) Approximate sample sizes required to estimate length distributions. Transactions of the American Fisheries Society 136, 409415.
Nguyen, KQ and Winger, PD (2019) Artificial light in commercial industrialized fishing applications: a review. Reviews in Fisheries Science and Aquaculture 27, 106126.
O'Neill, FG, Feekings, J, Fryer, RJ and Fauconnet, L (2019) Discard avoidance by improving fishing gear selectivity: helping the fishing industry help itself: reducing discards in complex, multi-species and multi-jurisdictional fisheries. In The European Landing Obligation Cham: Springer 1, 279296.
Ortiz, N, Mangel, JC, Wang, J, Alfaro-Shigueto, J, Pingo, S, Jimenez, A, Suarez, T, Swimmer, Y, Carvalho, F and Godley, BJ (2016) Reducing green turtle bycatch in small-scale fisheries using illuminated gillnets: the cost of saving a sea turtle. Marine Ecology Progress Series 545, 251259.
Santos, J, Herrmann, B, Otero, P, Fernandez, J and Pérez, N (2016) Square mesh panels in demersal trawls: does lateral positioning enhance fish contact probability? Aquatic Living Resources 29, 302. doi: 10.1051/alr/2016025.
Sciberras, M, Jenkins, SR, Mant, R, Kaiser, MJ, Hawkins, SJ and Pullin, AS (2013) Evaluating the relative conservation value of fully and partially protected marine areas. Fish and Fisheries 16, 5877.
Sterling, DJ (2005) Modelling the Physics of Prawn Trawling for Fisheries Management. Perth, WA:Curtin University of Technology.
Van Marlen, B (2003). Improving the selectivity of beam trawls in the Netherlands: the effect of large mesh top panels on the catch rates of sole, plaice, cod and whiting. Fisheries Research 63, 155168.
Wardle, CS (1983) Fish reactions to towed fishing gears. In MacDonald, A and Priede, IG (eds), Experimental Biology at Sea. London: Academic Press, pp. 167195.
Whittingham, MJ, Stephens, PA, Bradbury, RB and Freckleton, RP (2006) Why do we still use stepwise modelling in ecology and behaviour? Journal of Animal Ecology 75, 11821189.

Keywords

Type Description Title
WORD
Supplementary materials

Southworth et al. Supplementary Materials
Southworth et al. Supplementary Materials 1

 Word (47 KB)
47 KB
VIDEO
Supplementary materials

Southworth et al. Supplementary Materials
Southworth et al. Supplementary Materials 2

 Video (19.6 MB)
19.6 MB

Artificial light improves escapement of fish from a trawl net

  • Lucy K. Southworth (a1), Frances C. Ratcliffe (a1) (a2), Isobel S. M. Bloor (a1), Jack Emmerson (a1), Dan Watson (a3), David Beard (a4) and Michel J. Kaiser (a1) (a5)...

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.