Using harmonized historical catch data to infer the expansion of global tuna fisheries

Coulter, Angie; Cashion, Tim; Cisneros‐Montemayor, Andrés M.; Popov, Sarah; Tsui, Gordon; Manach, Frédéric Le; Schiller, Laurenne; Palomares, M.L.D.; Zeller, Dirk; Pauly, Daniel

doi:10.1016/j.fishres.2019.105379

Cited by 34 publications

(30 citation statements)

References 32 publications

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“…Tuna fishing has grown significantly in the waters of the Indonesian archipelago so that in 2016, Indonesia was the top country globally for tuna landings [2,6]. In the last 10 years, Indonesia has become involved in several regional fisheries management organizations, such as Indian Ocean Tuna Commission, Commission for the Conservation of Southern Bluefin Tuna, Western and Central Pacific Fisheries Commission, and the Inter-American Tropical Tuna Commission [7].…”

Section: Introductionmentioning

confidence: 99%

Catch per Unit Effort Dynamic of Yellowfin Tuna Related to Sea Surface Temperature and Chlorophyll in Southern Indonesia

Wiryawan

Loneragan

Mardhiah

et al. 2020

Fishes

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Tuna fisheries are the most valuable fisheries in the world, with an estimated market value of at least US$42 billion in 2018. Indonesia plays an important role in the global tuna fisheries and has committed to improve its fisheries management; therefore, a pilot of long-term spatial-temporal data bases was developed in 2012, however none have utilized data to have better understanding for management improvement. In this study, the annual and seasonal variation of large (≥10 kg) Yellowfin Tuna (YFT) catch per unit effort (CPUE) have been investigated and the influence of sea surface temperature (SST) and chlorophyll-a on these variables examined. We used fish landing data from West Nusa Tenggara recorded every month between 2012 and 2017 and analyzed using generalized linear models and generalized additive models. We found a seasonal and annual pattern of tuna abundance affected by SST and chlorophyll-a (chl a) and related to upwelling and El Nino event. These results also suggest that a two-month closure to fishing in August and September in southern Lombok is worth considering by the Government to maximize conservation of stocks due to a high abundance of juveniles emerging during the upwelling months from June to August.

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Section: Introductionmentioning

confidence: 99%

Catch per Unit Effort Dynamic of Yellowfin Tuna Related to Sea Surface Temperature and Chlorophyll in Southern Indonesia

Wiryawan

Loneragan

Mardhiah

et al. 2020

Fishes

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“…We classified the catches of pelagic species generally captured by the Marshallese-flagged industrial tuna fisheries and reported by the Western and Central Pacific Fisheries Commission (WCPFC) as the reported component of the domestic industrial fisheries, consisting mostly of tunas, billfishes, and pelagic sharks. Catches taken by foreign fleets fishing in the RMI EEZ were not included in the domestic catches presented here, but were addressed globally in Coulter et al (2020).…”

Section: Methodsmentioning

confidence: 99%

“…Because the catches of foreign fleets are either landed in foreign ports (mainly in Asia or the United States) or are transshipped in Majuro (FAO, 2009) for direct export shipping, these are assumed to be accounted for in the FAO fisheries landing data reported by these foreign flag countries, and are therefore not included in this study. However, a recent study reported substantial under-reporting of industrial tuna fisheries due to transshipment activities in the Western and Central Pacific (Anon, 2019), which highlights the need for a comprehensive reconstruction of unreported catches of global tuna fisheries (Coulter et al, 2020).…”

Section: Large-scale Sectormentioning

confidence: 99%

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Long-Term Fishing Catch and Effort Trends in the Republic of the Marshall Islands, With Emphasis on the Small-Scale Sectors

et al. 2020

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Small-scale fishing has been an important element of the livelihood and food security in Pacific island countries throughout history; however, such catches have been underreported in the official fisheries data. Here, we reconstruct the total domestic catches and fishing effort of the Republic of the Marshall Islands (RMI) by fishing sectors for 1950-2017. Reconstructed total catches were estimated to be 27% higher than the data officially reported by the Food and Agriculture Organization (FAO) of the United Nations on behalf of the RMI. Catches of the truly domestic, but export-oriented, industrial tuna sector accounted for 84% of the total catch, dominating catches since the early 2000s. The subsistence component contributed 74% of total small-scale catches, of which 92% was deemed unreported. The remaining 26% of small-scale catches were artisanal, i.e., small-scale commercial, in nature, of which 45% was deemed unreported. Trends suggested steady growth in small-scale catches from 1,100 t·year −1 in the early 1950s to a relatively stable level of 4,500 t·year −1 since the 1990s. However, over the 2009-2017 period, there was a gradual reduction of 2% per year in subsistence fishing, which was paralleled by a concomitant increase in artisanal catches of 3% per year. This gradual shift from predominantly non-commercial to commercial small-scale fisheries may be related to efforts to commercialize small-scale fisheries in the past decades. Small-scale fishing effort increased approximately 13-fold from the early 1980s to the late 2000s, stabilizing at around 401,000 kWdays since then, while catch-per-unitof-effort (CPUE) displayed an inverse pattern, declining eightfold between the 1980s and 1990s, and stabilizing around 15 kg·kWdays −1 in recent decades. These findings may assist sustainable coastal fisheries management in the RMI, which is particularly important given the increasing impacts of climate change on local stocks.

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“…Although longitudinal studies make valuable contributions to the knowledge base in many fields, it can be difficult and expensive to collect data over a multi-year period. Combining previously collected data with new data is another way to study changes over time (Clavero & Delibes 2013;Burgi, Steck, & Bertiller 2010;Coulter et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Historical Scientific Analog Data: Life Sciences Faculty’s Perspectives on Management, Reuse and Preservation

Farrell

Hendrickson

Mastel

et al. 2020

CODATA

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Older data in paper or analog format (e.g., field/lab notebooks, photos, maps) held in labs, offices, and archives across research institutions are an often overlooked resource for potential reuse in new scientific studies. However, there are few mechanisms to help researchers find existing analog data in order to reuse it. Yet, in the literature, reuse of historical data is particularly important in studies of biodiversity and climate change.We surveyed life science researchers at the University of Minnesota to understand and explore current and potential future use of historical data, attitudes around sharing and reusing data, and preservation of the data. Large amounts of historical data existed on our campus. Most researchers had reused or shared it, and many continued to add to their data sets. Some data had been scanned, over half of researchers have re-keyed some of their data into machinereadable format, and nearly all that were converted to a digital format were stored on unstable platforms and legacy formats. Researchers also expressed concerns about long-term preservation plans, or who to contact for assistance in planning for the future of the data, since much of these data are at risk for loss. Currently produced digital data sets are subject to guidelines and requirements developed at a national level. Solutions for historical analog data could benefit from a similar high-level treatment, and it will take experts from various fields to lead this effort. Given libraries' expertise in data management and preservation, librarians are in a position to collaborate on devising cross-disciplinary solutions.

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Using harmonized historical catch data to infer the expansion of global tuna fisheries

Cited by 34 publications

References 32 publications

Catch per Unit Effort Dynamic of Yellowfin Tuna Related to Sea Surface Temperature and Chlorophyll in Southern Indonesia

Catch per Unit Effort Dynamic of Yellowfin Tuna Related to Sea Surface Temperature and Chlorophyll in Southern Indonesia

Long-Term Fishing Catch and Effort Trends in the Republic of the Marshall Islands, With Emphasis on the Small-Scale Sectors

Historical Scientific Analog Data: Life Sciences Faculty’s Perspectives on Management, Reuse and Preservation

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