By-Catch: Problems and Solutions

Hall, Martín; Alverson, Dayton L.; Metuzals, Kaija I.

doi:10.1016/s0025-326x(00)00111-9

Cited by 554 publications

(469 citation statements)

References 36 publications

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“…Many of the largest commercial fishing methods, such as trawling, longlining, and seining, unavoidably catch multiple species simultaneously (6)(7)(8)(9). Multispecies fisheries pose a particular threat of extinction or severe depletion because fishing can remain profitable as long as some valuable species remain abundant, even while others collapse (6)(7)(8)(9)(10)(11). In contrast, in a single-species fishery profits tend to fall as the target population declines, thereby removing the incentive to fish before extinction occurs (10).…”

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confidence: 99%

Predicting overfishing and extinction threats in multispecies fisheries

Burgess¹,

Polasky

Tilman

2013

Proc. Natl. Acad. Sci. U.S.A.

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Threats to species from commercial fishing are rarely identified until species have suffered large population declines, by which time remedial actions can have severe economic consequences, such as closure of fisheries. Many of the species most threatened by fishing are caught in multispecies fisheries, which can remain profitable even as populations of some species collapse. Here we show for multispecies fisheries that the biological and socioeconomic conditions that would eventually cause species to be severely depleted or even driven extinct can be identified decades before those species experience high harvest rates or marked population declines. Because fishing effort imposes a common source of mortality on all species in a fishery, the long-term impact of a fishery on a species is predicted by measuring its loss rate relative to that of species that influence the fishery's maximal effort. We tested our approach on eight Pacific tuna and billfish populations, four of which have been identified recently as in decline and threatened with overfishing. The severe depletion of all four populations could have been predicted in the 1950s, using our approach. Our results demonstrate that species threatened by human harvesting can be identified much earlier, providing time for adjustments in harvesting practices before consequences become severe and fishery closures or other socioeconomically disruptive interventions are required to protect species.early warning | preventative management | overharvesting | mechanistic | assessment

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mentioning

confidence: 99%

Predicting overfishing and extinction threats in multispecies fisheries

Burgess¹,

Polasky

Tilman

2013

Proc. Natl. Acad. Sci. U.S.A.

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“…This leads to a large number of sea turtle captures with an important impact on Southern Gabon and Northern Congo Olive Ridley and Leatherback populations [33]. It appears important to quantify marine turtle by-catch by efficient methods such as the presence of on-board observers on the fisheries [24]. Today more than 50 different observer programs are operating in the world oceans with a new one recently started in Ghana by NOAA scientists (4).…”

Section: Discussionmentioning

confidence: 99%

Marine Turtles Nesting Activity Assessment and Trend along the Central African Atlantic Coast for the Period of 1999-2008

Girondot¹,

MC²

2016

IJMO

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“…The country's fisheries are heavily focused on tuna, which are fished using pole-and-line methods, virtually eliminating the potential for bycatch [17]. Furthermore, the government considers employment and sustainability in the fishing sector to be the top priorities, far ahead of the sector's contribution to GDP [18].…”

Section: Creating An Appropriate Frame Of Referencementioning

confidence: 99%

Local and regional experiences with assessing and fostering ocean health

et al. 2016

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a b s t r a c tDuring the international symposium on "Regional Applications and Nexus of the Ocean Health Index" at The University of Tokyo in Japan in July 2015, a range of experts, practitioners and researchers discussed the potential for assessing the current state of ocean health at different scales, as well as changes over time. Discussions focused on how the successful assessment and implementation of projects aimed at fostering ocean health and resilient coastal ecosystems strongly depends on a multi-stakeholder approach and local leadership. In addition, recent examples of regional independent assessments conducted using the Ocean Health Index were introduced, with an accompanying explanation of how the Index goals can be adjusted, specified or weighted in line with a local context or policy direction. This manuscript introduces key points raised during the symposium as well as relevant supplementary materials.

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By-Catch: Problems and Solutions

Cited by 554 publications

References 36 publications

Predicting overfishing and extinction threats in multispecies fisheries

Predicting overfishing and extinction threats in multispecies fisheries

Marine Turtles Nesting Activity Assessment and Trend along the Central African Atlantic Coast for the Period of 1999-2008

Local and regional experiences with assessing and fostering ocean health

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