A new concept for bycatch reduction in small-scale accordion-shaped trap fisheries of the Yellow Sea, China

Yu, Mengjie; Liu, Changdong; Sun, Li‐Zhong; Zhang, Liyou; Tang, Yanli

doi:10.1016/j.fishres.2023.106685

Cited by 4 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Discussionmentioning

confidence: 99%

“…If there is no prior light‐mediated behaviour available for species, an alternative method may be to investigate the physiology and ecology of the target and bycatch species, where differences have previously been exploited to improve catch selectivity with BRDs (Glass, 2000; Yu et al., 2023). For example, gridded escape panels on nets have been successful in reducing flatfish bycatch whilst maintaining roundfish catch, due to the body shape of flatfish (Yu et al., 2023). Additionally, differences in swim speeds of target and bycatch species can be utilised when positioning BRDs on nets, to allow for bycatch escapement or avoidance (Breen et al., 2004; Broadhurst & Millar, 2023; He, 1993; Ryer, 2008).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The use of vision modelling to design bycatch reduction devices using light

Somerville,

Blount,

Stevens

2024

Fish and Fisheries

View full text Add to dashboard Cite

Artificial light can be used to deter unwanted non‐target catch (bycatch) from fishing gear, which is thought to be achieved by repelling bycatch, or highlighting escape routes on nets. To select for responses in bycatch species, light should (1) cause the bycatch species to avoid capture, and (2) not invoke the same reaction in target species. One way to maximise the chance of a bycatch species responding to light is to ensure the light colour used is more visible to bycatch species. Some studies have considered the visual sensitivity of certain species to address this. In particular, the wavebands of light that a species is sensitive to. However, using this measurement alone is incomplete as it does not consider other factors that affect visibility, such as the ambient light spectrum, and wavelength‐dependant light attenuation in different water types and depths. To account for these variables, and to more accurately predict how both target and bycatch species view light colours in a fishing context, we used a model of the vision of commercially relevant species in fisheries across the world. From this, we show whether a light colour is more visible to a bycatch species compared to a target species in a particular depth and water type, and how modelling can be used to make informed assessments of the selection of relevant light colours in fishing. We also discuss the limitations of using vision models alone and the need for corresponding behaviour and/or fishing trials with lights.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The use of vision modelling to design bycatch reduction devices using light

Somerville,

Blount,

Stevens

2024

Fish and Fisheries

View full text Add to dashboard Cite

show abstract

“…The decline in fish stocks can be closely linked to the exploitation pattern of fisheries, especially fishing intensity and the size selectivity and catch efficiency of fishing gear. It is widely acknowledged that extensive use of fishing gear with poor selectivity is one of the primary drivers contributing to the overexploitation of fishery resources [10][11][12][13][14]. As the main fishing gear for harvesting croaker species, before legislation for stow net fisheries, the commonly used stow nets had small mesh sizes (17-20 mm) in the codend, which was considered nonselective [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Codend Design and Mesh Size on the Size Selectivity and Exploitation Pattern of Three Commercial Fish in Stow Net Fishery of the Yellow Sea, China

Herrmann

Liu

et al. 2023

Sustainability

Self Cite

View full text Add to dashboard Cite

To address the issue of minimum mesh size regulations of the stow net fishery for croaker species, we tested and compared the size selectivity and exploitation pattern for diamond- and square-mesh codends with mesh sizes 35, 45 and 55 mm for little yellow croaker (Larimichthys polyactis), silver croaker (Pennahia argentata), and flower croaker (Nibea albiflora) in the Yellow Sea, China. Our results showed that the legal codend (35 mm diamond-mesh) was inadequate to protect the juvenile croaker species because more than 75% of undersized individuals were retained, and the discard ratios were as high as approximately 60%. Irrespective of mesh shape, increasing the codend mesh sizes could significantly improve the size selectivity and exploitation pattern of croaker species. Between codends with the same mesh size, the square-mesh codends had higher size selectivity than diamond-mesh codends. Based on results, the 55 mm square-mesh codend was recommended for rational exploitation of croaker stocks. This study can provide feasibility and insight for the enforcement and reform of management strategies for sustainable fishing in Chinese stow net fisheries.

show abstract