Degradability evaluation for natural material fibre used on fish aggregation devices (FADs) in tuna purse seine fishery

Wang, Yucheng; Zhou, Cheng; Xu, Liuxiong; Wu, Rong; Shi, Jiangao; Wang, Xuefang; Tang, Hao; Yu, Wenwen; Wang, Kai

doi:10.1016/j.aaf.2020.06.014

Cited by 11 publications

(8 citation statements)

References 14 publications

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“…Potential alternative materials that are being tested to maintain buoyancy include balsa wood, although its availability varies by region (Moreno et al, 2016). Various organic submerged appendages have been tested with different plant‐based materials, including ropes made of cotton, jute, sisal, coconut husk fibre, among others (e.g., Lopez et al, 2019; Moreno et al, 2019; Wang et al, 2021). In most of the experiences testing biodegradable dFADs, the same design as in conventional dFADs (Figure 1) was used but replacing plastic by biodegradable materials.…”

Section: Management Solutionsmentioning

confidence: 99%

Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices

Pons,

Kaplan,

Moreno

et al. 2023

Fish and Fisheries

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Drifting fish aggregating devices (dFADs) are human‐made floating objects widely used by tropical tuna purse seine (PS) fisheries to increase catch of target species. However, dFAD use has several negative impacts, including increased potential for overfishing, higher juvenile tuna catch, higher bycatch compared to other PS fishing modes, ghost‐fishing, and generation of marine litter. Based on these impacts, some stakeholders, especially environmental non‐governmental organizations and other competing fishing industries, suggest that dFADs should be completely banned. We list the pros and cons of dFAD fishing; address how to improve current management; and suggest solutions for the sustainability of dFAD fishing in the long term. A dFAD ban would lead to major changes in the availability and sourcing of tuna for human consumption and decrease the licensing revenue received by many developing states. Most importantly, we argue that tools exist today to manage for, reduce or eliminate most of the negative impacts of dFADs (e.g., bans on discards, limits on active dFADs, biodegradable non‐entangling constructions, time‐area deployment closures, recovery programs, and full data transparency, among others). Management decisions based on sound scientific reasoning are needed to address the legitimate concerns surrounding dFAD use and ensure the sustainability of both pelagic and coastal ecosystems and tropical tuna PS fisheries.

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Section: Management Solutionsmentioning

confidence: 99%

Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices

Pons,

Kaplan,

Moreno

et al. 2023

Fish and Fisheries

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“…BIOFADs that degrade after their useful lifetime (> 6 months; Moreno et al, 2018;Wang et al, 2021) may significantly reduce the impact and number of FAD beachings worldwide. However, this may not be effective within the Seychelles, considering we found that the majority of beachings occurred between 18 and 65 d (0.5-2 months) after deployment.…”

Section: Discussionmentioning

confidence: 99%

Spatio-temporal variability in drifting Fish Aggregating Device (dFAD) beaching events in the Seychelles Archipelago

MacMillan

Attrill

Imzilen

et al. 2022

ICES Journal of Marine Science

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Purse-seine fisheries use drifting Fish Aggregating Devices (dFADs), human-made floating objects, to facilitate the capture of tropical tunas. Currently, the majority of dFADs are constructed primarily of highly durable non-biodegradable materials and there is no legal obligation to recover dFADs after deployment, leading to beaching events and potentially negative environmental impacts. We assessed beachings as a function of intra- and inter-annual trends, water depth, distance from land, seasonality, and benthic habitat within the local context of the Seychelles Archipelago using trajectories of dFADs deployed by French purse seiners over 2008–2020. Overall, 3842 beaching events associated with 2371 distinct dFAD tracking buoys were identified. Beachings occurred most frequently during the winter monsoon (December–March). Due to the shallow Mahé Plateau, beachings occurred in both nearshore (≤ 5 km from land) and offshore (> 5 km) regions, predominantly in estimated depths less than 60 m. Despite representing < 20% of overall mapped habitat, the benthic habitat “Coral/Algae” had the highest beaching rate (35.3% of beachings), and therefore, beachings pose a significant concern for conservation. Our results provide a detailed view of the spatio-temporal pattern of beachings in the Seychelles, supporting the development of mitigation and prevention methods to reduce marine debris and perturbations to the marine environment.

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“…Although some RFMOs are beginning to demand that dFADs must be nonentangling, the criteria for a non-entangling dFAD are still very weak. Many dFADs constructed to be non-entangling become entangling with the passage of time (Wang et al 2020).…”

Section: The Impact Of Industrial Fishingmentioning

confidence: 99%

Shark conservation: Analysis and synthesis

Darvell¹,

Porcher²

2022

Preprint

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The market for shark fin soup, a fashionable, high-end Chinese dish, has resulted in intensive shark fishing across all oceans. At the same time, 90% of teleost fish stocks are over-exploited, making sharks the most lucrative target: fisheries that have not previously hunted them are now. As top and middle predators, sharks have high ecological value and poor capacity to withstand fishing mortality, but though their numbers are plummeting, the secretive nature of the fin trade, along with the difficulties of obtaining relevant data, obscure their true status. In consumer countries, shark fin is a luxury item and rich consumers are willing to pay high prices. There is little interest in sustainability or legal trade. Thus market demand will continue to fuel the search for sharks and those accessible to fishing fleets are increasingly endangered. Current legal protections are not working, as is clearly seen in the case of the shortfin mako. Claims that sharks can withstand such targeted, industrial hunting and be sustainably fished under these circumstances are shown to be misguided. In the interests of averting a catastrophic collapse across the planet’s aquatic ecosystems, sharks must be given effective protection. We recommend that all sharks, chimaeras, manta rays, devil rays, and rhino rays be protected from international trade through an immediate CITES Appendix I listing. However, a binding international agreement for protection, not only of sharks, but of the loss of biodiversity in general, is what is most needed to allow marine and fresh water ecosystems to recover.

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Degradability evaluation for natural material fibre used on fish aggregation devices (FADs) in tuna purse seine fishery

Cited by 11 publications

References 14 publications

Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices

Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices

Spatio-temporal variability in drifting Fish Aggregating Device (dFAD) beaching events in the Seychelles Archipelago

Shark conservation: Analysis and synthesis

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