Fisheries bycatch reduction within the least-cost biodiversity mitigation hierarchy: Conservatory offsets with an application to sea turtles

Squires, Dale; Restrepo, Victor; Garcia, Serge; Dutton, Peter H.

doi:10.1016/j.marpol.2018.03.018

Cited by 21 publications

(6 citation statements)

References 17 publications

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“…The weighting values used in this study were supported by specialized literature and expert knowledge, but one of the advantages of the conceptual framework and the approach used in this analysis is that the user can adjust and define the values that they consider most appropriate, enabling the evaluation of different weighting scenarios for the variables. However, in terms of the potential impacts of the 6 threats evaluated here, sea turtle bycatch (with its origin in fishing effort and inappropriate fishing practices) is considered one of the greatest threats to these species worldwide (Lewison et al 2014, Squires et al 2018, so it is not unusual that the specialists scored this as the top threat.…”

Section: Spatially Explicit Ecological Vulnerability Of Sea Turtlesmentioning

confidence: 99%

Ecological vulnerability of two sea turtle species in the Gulf of Mexico: an integrated spatial approach

Cuevas¹,

Liceaga-Correa²,

Uribe-Martínez³

2019

Endang. Species. Res.

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Changes in ecological attributes as a result of anthropogenic activities and climatic forces can jeopardize biodiversity, so these potential impacts must be evaluated for conservation. Integrating the different components of a large ecosystem can, however, pose a methodological challenge. When evaluating the sensitivity of a system, the level of stress imposed by a threat and the system's ability to deal with pressures ultimately define its actual condition. The objective of this study was to assemble a spatially explicit quantitative approach for evaluating the ecological vulnerability of 2 sea turtle species (Eretmochelys imbricata and Chelonia mydas). We used a method that combined the use of an open source planning tool (Conservation Action Planning) and spatial multicriteria analysis to determine the total cumulative ecological vulnerability to multiple threats for each species individually and for both species combined. The spatially explicit outputs were supported by hard data and expert knowledge, including the cumulative ecological vulnerability of each species to multiple threats. For each species, we identified areas in the Gulf of Mexico where individual threats have a potential impact and also determined high vulnerability locations. This spatially explicit approach is important when assessing ecological vulnerability and risk, it is versatile and easily reproducible for other organisms, and can be an important tool in supporting the conservation and management of endangered species.

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Section: Spatially Explicit Ecological Vulnerability Of Sea Turtlesmentioning

confidence: 99%

Ecological vulnerability of two sea turtle species in the Gulf of Mexico: an integrated spatial approach

Cuevas¹,

Liceaga-Correa²,

Uribe-Martínez³

2019

Endang. Species. Res.

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“…From pollution to illegal, unreported and unregulated (IUU) fishing, to habitat alteration and loss, bycatch, climate change, and recently Covid-19, the negative impacts are common and extensive. There have also been many successes in the marine realm (e.g., bycatch reduction; Squires et al 2018 ; Komoroske and Lewison 2015 ), though there is insufficient space to explore all of these topics in detail here. Notably, however, we are now beginning to realize that these (and other issues) are also problematic in inland waters (Reid et al 2019 ).…”

Section: Approachmentioning

confidence: 99%

Towards vibrant fish populations and sustainable fisheries that benefit all: learning from the last 30 years to inform the next 30 years

Cooke

Fulton

Sauer

et al. 2023

Rev Fish Biol Fisheries

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A common goal among fisheries science professionals, stakeholders, and rights holders is to ensure the persistence and resilience of vibrant fish populations and sustainable, equitable fisheries in diverse aquatic ecosystems, from small headwater streams to offshore pelagic waters. Achieving this goal requires a complex intersection of science and management, and a recognition of the interconnections among people, place, and fish that govern these tightly coupled socioecological and sociotechnical systems. The World Fisheries Congress (WFC) convenes every four years and provides a unique global forum to debate and discuss threats, issues, and opportunities facing fish populations and fisheries. The 2021 WFC meeting, hosted remotely in Adelaide, Australia, marked the 30th year since the first meeting was held in Athens, Greece, and provided an opportunity to reflect on progress made in the past 30 years and provide guidance for the future. We assembled a diverse team of individuals involved with the Adelaide WFC and reflected on the major challenges that faced fish and fisheries over the past 30 years, discussed progress toward overcoming those challenges, and then used themes that emerged during the Congress to identify issues and opportunities to improve sustainability in the world's fisheries for the next 30 years. Key future needs and opportunities identified include: rethinking fisheries management systems and modelling approaches, modernizing and integrating assessment and information systems, being responsive and flexible in addressing persistent and emerging threats to fish and fisheries, mainstreaming the human dimension of fisheries, rethinking governance, policy and compliance, and achieving equity and inclusion in fisheries. We also identified a number of cross-cutting themes including better understanding the role of fish as nutrition in a hungry world, adapting to climate change, embracing transdisciplinarity, respecting Indigenous knowledge systems, thinking ahead with foresight science, and working together across scales. By reflecting on the past and thinking about the future, we aim to provide guidance for achieving our mutual goal of sustaining vibrant fish populations and sustainable fisheries that benefit all. We hope that this prospective thinking can serve as a guide to (i) assess progress towards achieving this lofty goal and (ii) refine our path with input from new and emerging voices and approaches in fisheries science, management, and stewardship.

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“…This can then allow for identification of least-cost conservation measures, which minimize elasmobranch mortality while maximizing opportunity costs to fishers (Squires et al, 2018). Third, continued and expanded collection of species-specific catch and trade data should be carried out, allowing for management measures to become more refined as more data becomes available, and assessments of the ecological and social impacts of management measures, to inform adaptive management.…”

Section: Future Directions For Research and Implementationmentioning

confidence: 99%

Elasmobranch fishing and trade in Sarawak, Malaysia, with implications for management

Booth

Chaya²,

Ng³

et al. 2021

Aquatic Conservation

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1. Many shark and ray (elasmobranch) species are threatened with extinction, due to overfishing and commercial trade 2. Sarawak is situated in Malaysian Borneo in the Coral Triangle: a global priority region for elasmobranch conservation. Malaysia is the world's eighth largest elasmobranch fishing nation, and Sarawak is one of Malaysia's largest fishing states, yet there are limited species-specific data on catch and trade of elasmobranchs to support conservation and fisheries management decisions. 3. This study presents landing site and market survey data, collected in Sarawak from January 2017 to December 2019. Geographical, temporal and operational trends in volumes of catch and trade are explored; the total volume, value and species composition of Sarawak's local elasmobranch markets is estimated; and simple size-based indicators are used to assess the sustainability of elasmobranch utilization for several conservation-priority and frequently traded species, including Critically Endangered and CITES-listed scalloped hammerhead sharks (Sphyrna lewini) and bottlenose wedgefish (Rhynchobatus australiae).4. The results conservatively estimate that >26,500 elasmobranchs (90,000 kg) are locally traded in Sarawak annually, worth US$125,000 per year at the market level. 5.Trade is dominated by small to medium-sized coastal requiem sharks (Carcharhinidae) and stingrays (Dasyatidae), with endangered and CITES-listed species making up 26% and 32% of total landings and trade, respectively. 6. High proportions of immature individuals were recorded, with evidence of overfishing for several species, based on simple size-based indicators.7. Several options are outlined for improving management of elasmobranch fishing and trade in the future, including spatio-temporal closures and live release protocols, which could help to reduce the mortality of critically endangered species and implement CITES. Such measures could have large conservation impacts with limited socio-economic cost, since these species make up <5% of the total value of the elasmobranch market. However, management plans need to be co-designed with full participation of affected coastal communities in order to be ethical and effective.

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Fisheries bycatch reduction within the least-cost biodiversity mitigation hierarchy: Conservatory offsets with an application to sea turtles

Cited by 21 publications

References 17 publications

Ecological vulnerability of two sea turtle species in the Gulf of Mexico: an integrated spatial approach

Ecological vulnerability of two sea turtle species in the Gulf of Mexico: an integrated spatial approach

Towards vibrant fish populations and sustainable fisheries that benefit all: learning from the last 30 years to inform the next 30 years

Elasmobranch fishing and trade in Sarawak, Malaysia, with implications for management

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