Global fishing effort (1950–2010): Trends, gaps, and implications

Anticamara, JA; Watson, Reg; Gelchu, Ahmed; Pauly, Daniel

doi:10.1016/j.fishres.2010.10.016

Cited by 241 publications

(186 citation statements)

References 21 publications

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“…1C). Interpretation of inter-LME effort differences, however, is impeded by large uncertainties in catch per unit of vessel power for different gears, fish targets, and fishing histories (27,30). In the Peru-Chile upwelling system, for example, an efficient small boat fishery targeting massive aggregations of schooling small pelagic fish has sustained exceptionally high catch rates despite modest vessel power.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Reconciling fisheries catch and ocean productivity

Stock

John

Rykaczewski

et al. 2017

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

219

255

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Photosynthesis fuels marine food webs, yet differences in fish catch across globally distributed marine ecosystems far exceed differences in net primary production (NPP). We consider the hypothesis that ecosystem-level variations in pelagic and benthic energy flows from phytoplankton to fish, trophic transfer efficiencies, and fishing effort can quantitatively reconcile this contrast in an energetically consistent manner. To test this hypothesis, we enlist global fish catch data that include previously neglected contributions from small-scale fisheries, a synthesis of global fishing effort, and plankton food web energy flux estimates from a prototype high-resolution global earth system model (ESM). After removing a small number of lightly fished ecosystems, stark interregional differences in fish catch per unit area can be explained (r = 0.79) with an energy-based model that (i) considers dynamic interregional differences in benthic and pelagic energy pathways connecting phytoplankton and fish, (ii) depresses trophic transfer efficiencies in the tropics and, less critically, (iii) associates elevated trophic transfer efficiencies with benthic-predominant systems. Model catch estimates are generally within a factor of 2 of values spanning two orders of magnitude. Climate change projections show that the same macroecological patterns explaining dramatic regional catch differences in the contemporary ocean amplify catch trends, producing changes that may exceed 50% in some regions by the end of the 21st century under high-emissions scenarios. Models failing to resolve these trophodynamic patterns may significantly underestimate regional fisheries catch trends and hinder adaptation to climate change.fisheries catch | primary production | ocean productivity | climate change | food webs N early 50 years ago, John Ryther (1) published his seminal work "Photosynthesis and Fish Production in the Sea" in which he hypothesized that differences in net primary production (NPP) alone could not explain stark differences in fish catch across disparate marine ecosystems. Drawing upon "trophic dynamic" principles governing the transfer of energy through ecosystems (2), he hypothesized that synergistic interactions between NPP differences, the length of food chains connecting phytoplankton and fish, and the efficiency of trophic transfers were required to reconcile catch differences. The trophodynamic principles drawn upon by Ryther now underpin diverse models and indicators used in ecosystem-based marine resource management (3-5), yet stubborn uncertainties in the relationship between ocean productivity and fish catch persist. Official catch reports often omit globally significant discards and small-scale artisanal and subsistence catch (6). Uncertain differences in fishing effort and impacts of fishing history complicate attribution of catch differences to "bottom-up" considerations of ocean productivity or "top-down" fishing effects (7). Difficulties directly observing and estimating trophodynamic properties, including NPP (8),...

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Section: Resultsmentioning

confidence: 99%

“…Results are highly robust to estimating TE across 4, 4.5, and 5 trophic levels (Table S2). Fishing effort data were mapped from FAO, European, and associated bodies' data between 1950 and 2006 (30). The mean of the top 10 effective effort years was used in Fig.…”

Section: Methodsmentioning

confidence: 99%

Reconciling fisheries catch and ocean productivity

Stock

John

Rykaczewski

et al. 2017

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

219

255

View full text Add to dashboard Cite

show abstract

“…Market-based Surveys, Mislabeling of Marine Resources, and Molecular Forensics.-Globally, fisheries resources are under pressure, with the majority of fish stocks fully exploited, overexploited, or depleted (Anticamara et al 2011), including some of those in the Indo-Pacific (Pauly et al 1998). Seafood fraud, whether through the intentional mislabeling of species or accidentally misidentifying or misnaming catches, is under-reported globally, with most examples from North America (Marko et al 2004, Wong and Hanner 2008, Cline 2012 and Europe Mariani 2010, Garcia-Vasquez et al 2011).…”

Section: Detection Of Invasive Species and Reconstruction Of Invasionmentioning

confidence: 99%

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Heyden¹,

Beger²,

Toonen³

et al. 2014

BMS

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ABSTRACT.-Molecular tools and analyses have played pivotal roles in uncovering the processes and patterns of biodiversity in the Indian and Pacific oceans. However, integrating genetic results into management and conservation objectives has been challenging, with few examples that show practical applicability. This review aims to address some of the perceived barriers to an enhanced approach that integrates molecular data into management and conservation goals, by reviewing papers relevant to both conservation and fisheries management in the Indo-Pacific region, particularly with respect to phylogeography, connectivity, and species identification, as well as stock delineation, restoration of depleted wild stocks, mislabeled marine resources and "molecular forensics." We also highlight case studies from each of these areas that illustrate how molecular analyses are relevant to conservation and management in the IndoPacific, spanning a variety of vertebrate and invertebrate species. We discuss the application of genetic data to the design and evaluation of the effectiveness of marine protected area networks, stock delineation, and restoration and the usage of exclusion tests and parentage analyses for fisheries management. We conclude that there is a distinct need for increasing public awareness and ownership of genetically unique lineages and, ultimately, the increased inclusion of genetic research into management policy and conservation. Finally, we make a case for the importance of clear and effective communication for promoting public awareness, public ownership, and for achieving conservation goals within the region.

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“…Excessive fishing pressure and the resulting decline in fish stocks and loss of marine biodiversity is a growing concern worldwide (Pauly et al 1998(Pauly et al , 2002Jackson et al 2001;Worm et al 2006Worm et al , 2009Swartz et al 2010;Anticamara et al 2011). Jackson et al (2001) argue that "ecological extinction caused by overfishing precedes [i.e., is more important than] all other pervasive human disturbance to coastal ecosystems, including pollution, degradation of water quality, and anthropogenic climate change."…”

Section: Prey Depletionmentioning

confidence: 99%

Marine Mammals of the Gulf of Mexico

Würsig

2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

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Global fishing effort (1950–2010): Trends, gaps, and implications

Cited by 241 publications

References 21 publications

Reconciling fisheries catch and ocean productivity

Reconciling fisheries catch and ocean productivity

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Marine Mammals of the Gulf of Mexico

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