Scallop potting with lights: A novel, low impact method for catching European king scallop (Pecten maximus)

Enever, R.; Doherty, Philip D.; Ashworth, Jon; Duffy, Mark T.; Kibel, Pete; Parker, M. W.; Stewart, Bryce D.; Godley, Brendan J.

doi:10.1016/j.fishres.2022.106334

Cited by 5 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Artificial lights have been shown to influence scallop behavior as well, with a study on Placopecten magellanicus finding that that the addition of artificial lights to a towed survey sled reduced scallop swimming behavior [ 46 ]. Pecten maximus have been shown to swim towards and into static fishing gear that is illuminated with LED lights [ 47 ] (although this is not currently a viable alternative to dredging due to low numbers of scallops caught, it could augment existing static gear crustacean catches). The reaction of organisms to artificial light could be further investigated to reduce bycatch or increase scallop catches.…”

Section: Discussionmentioning

confidence: 99%

Catch yield and selectivity of a modified scallop dredge to reduce seabed impact

Fenton,

Szostek,

Delargy

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

Global scallop fisheries are economically important but are associated with environmental impacts to seabed communities resulting from the direct physical contact of the fishing gear with the seabed. Gear modifications attempting to reduce this contact must be economically feasible such that the catch numbers for the target species is maintained or increased. This study investigated the outcome of reducing seabed contact on retained catch of scallops and bycatch by the addition of skids to the bottom of the collecting bag of scallop dredges. We used a paired control experimental design to investigate the impact of the gear modification in different habitat types. The modified skid dredge generally caught more marketable scallops per unit area fished compared with the standard dredge (+5%). However, the skid dredge also retained more bycatch (+11%) and more undersize scallops (+16%). The performance of the two dredges was habitat specific which indicates the importance of adjusting management measures in relation to habitat type. To realize the potential environmental benefits associated with the improvement in catchability of this gear modification, further gear modification is required to reduce the catch of undersize scallops and bycatch. Furthermore we advocate that technical gear innovations in scallop dredging need to be part of a comprehensive and effective fisheries management system.

show abstract

Section: Discussionmentioning

confidence: 99%

Catch yield and selectivity of a modified scallop dredge to reduce seabed impact

Fenton,

Szostek,

Delargy

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…The use of lights at, or close to, the sea surface to attract and aggregate fishes and invertebrates, notably squid, at night has a long history in pelagic purse seine, squid, and other capture fisheries. However, lights are now deployed at greater depths, from 50 to 1000 m. These lights have commercial applications, such as deep-water bottom trawls for Mediterranean shrimp [26] and other trawl and trap fisheries (e.g., [27]). Such lighting can substantially increase catches but may also increase bycatch of undersized or immature individuals [26].…”

Section: Submerged Artificial Light Fisheriesmentioning

confidence: 99%

“…Such lighting can substantially increase catches but may also increase bycatch of undersized or immature individuals [26]. By contrast, potential benefits include a reduction of bycatch in some contexts [28] and replacement of trawls with traps [27]. The ecological effects of persistent artificial light in deeper waters, as compared with surface waters, are largely unknown, but likely are negative given that deep-water species have adapted to dark conditions.…”

Section: Submerged Artificial Light Fisheriesmentioning

confidence: 99%

A global biological conservation horizon scan of issues for 2023

Sutherland

Bennett²,

Brotherton³

et al. 2023

Trends in Ecology & Evolution

View full text Add to dashboard Cite

“…Light is a key environmental cue that drives behaviour and movement patterns of aquatic invertebrates (Bruce-white and Shardlow, 2011;Naylor, 1999;Tierney et al, 2017). Light stimuli can thereby determine the timing of movement activities as well as their direction, potentially triggering movements towards ( positive phototaxis) or away from (negative phototaxis) the light (Enever et al, 2022;Kappes and Sinsch, 2005;Toomey et al, 2002;Uryu et al, 1996). Consequently, light patterns and availability strongly influence species' spatial distributions and the temporal dynamics of many aquatic invertebrate communities (Hobbs et al, 2021;Kessler et al, 2008;Lagergren et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…However, we still have a limited understanding of what drives unionid movement behaviour (Haag, 2012). While movements in response to light cues have been recorded in a number of marine and freshwater bivalve speciessuch as in king scallops, Pecten maximus, zebra mussels, Dreissena polymorpha, and golden mussels, Limnoperna fortuneand encompass both positive and negative phototactic responses (Enever et al, 2022;Toomey et al, 2002;Uryu et al, 1996), the role of light as a potential stimulus of unionid locomotion is largely unresolved. Yet, light availability and intensity have been shown to affect non-locomotion unionid behaviours such as valve closure (Braun and Job, 1965;McIvor, 2004) and to trigger changes in feeding rates (Hills et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

‘Phototaxis’ in the absence of light? Locomotory patterns in unionid mussels

Zapitis,

Ramsey,

Huck

et al. 2023

Journal of Experimental Biology

View full text Add to dashboard Cite

Locomotion in benthic invertebrates can strongly affect habitat selection and ecosystem nutrient cycling. In the case of freshwater mussels, the drivers of locomotion are largely unresolved. Our aim was to assess the influence of light presence and intensity on the locomotory behaviour of freshwater mussels in controlled laboratory experiments. The species investigated in our study were Anodonta anatina and Unio pictorum, two widely distributed mussels in European lentic and lotic inland waters. At low algal concentrations, known to be associated with more frequent locomotory activities, we found that both species moved primarily in the absence of light (72.7% of all movements across experiments). However, the movements of both species were directed towards the light source, resembling a net-positive ‘phototactic’ response but in the absence of light. The distance to the light source, which was negatively correlated to light intensity, had a positive effect on the distance covered in locomotory activities by A. anatina but not by U. pictorum. Intraspecific variation in shell size had no impact on movement distance, indicating that the energetic costs of movement were not a limiting factor. We suggest that the observed movement towards brighter locations helps to enhance food quantity and quality, whilst movement in darkness mitigates predation risks.

show abstract

Scallop potting with lights: A novel, low impact method for catching European king scallop (Pecten maximus)

Cited by 5 publications

References 38 publications

Catch yield and selectivity of a modified scallop dredge to reduce seabed impact

Catch yield and selectivity of a modified scallop dredge to reduce seabed impact

A global biological conservation horizon scan of issues for 2023

‘Phototaxis’ in the absence of light? Locomotory patterns in unionid mussels

Contact Info

Product

Resources

About