From bonito to anchovy: a reconstruction of Turkey’s marine fisheries catches (1950-2010)

Ulman, Aylin; Bekisoglu, S.; Zengin, Mustafa; Knudsen, Ståle; Ünal, Vahdet; Mathews, C. P.; Harper, Sarah; Zeller, Dirk; Pauly, Daniel

doi:10.12681/mms.414

Cited by 44 publications

(44 citation statements)

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“…Illegal, unreported and unregulated (IUU) catch is a common practice in the Black Sea especially for the Turkish fishing fleet, which constitutes the majority of the fishing effort and the catches in the Black Sea. Particularly for small pelagic fish such as sprat and anchovy, IUU catches were shown to be very high (Ulman et al, 2013). Hence, the model simulated catches can be considered to be comparatively more realistic than what is reported by fisheries statistics.…”

Section: Assessment Of the Current Statusmentioning

confidence: 87%

Evolution of Future Black Sea Fish Stocks under Changing Environmental and Climatic Conditions

et al. 2017

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Here we present a case study toward producing quantitative scientific advice on the application of the EU Common Fisheries Policy (CFP) in the Black Sea. We provide estimates of fishing mortality rates at levels which will lead to rebuilding and maintaining stocks above biomass levels that could produce maximum sustainable yield (MSY) under the IPCC RCP4.5 future climate scenario together with the business as usual (BAU) river discharge scenario. In this study, we have implemented a coupled, basin-scale circulation-biogeochemical model and used its output to feed a food web model to test near-future changes that may be observed in the Black Sea ecosystem under the influence of contemporary fisheries exploitation conditions. In order to test model response to changes in climate and related drivers, the future climate scenario (2015-2020) simulation was compared to the present day (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014) simulation. Likewise, to test the sensitivity of the higher trophic level food web model to changes in fishing pressure, a future estimate of fishing pressure was projected based on its respective contemporary value and applied to each fish stock. Using these models, fishing mortality rates that could produce the maximum sustainable yield (F MSY ) in future years 2015-2020 and ensure the long-term recovery of the predatory fish stocks of the Black Sea are predicted. Future projections suggest that all fish stock will decrease in all the regions of the Black Sea except for sprat. Anchovy is expected to show the highest decrease in biomass. Analyses on F MSY estimates show that a significant reduction in fisheries exploitation is required for the sustainable management of the Black Sea ecosystems and the related services. This study, for the first time, presents future stock size, F MSY , and MSY estimates for the Black Sea for 11 fish species. F MSY values are generally lower than estimates of the scientific, technical, and economic committee for fisheries (STECF), mainly because of the explicit food web interactions that the modeling system allows to be considered.

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Section: Assessment Of the Current Statusmentioning

confidence: 87%

Evolution of Future Black Sea Fish Stocks under Changing Environmental and Climatic Conditions

et al. 2017

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“…Country-specific technical details on how these six points were implemented are presented in Coll et al (in press) for Spain, Bultel et al (in press) for France, Piroddi et al (in press) for Italy, and Ulman et al (2013) for Turkey, which collectively form the basis of this contribution (see also Table 1 for summary statistics for the separate countries, and Table 2 for a summary of results for each country).…”

Section: Methodsmentioning

confidence: 99%

‘Reported’ versus ‘likely’ fisheries catches of four Mediterranean countries

Pauly¹,

Ulman²,

Piroddi³

et al. 2014

Sci. Mar.

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Summary:The fisheries catch statistics that member countries report annually to the Food and Agriculture Organization of the United Nations were compared, for the years 1950 to 2010, with 'reconstructed', and more likely catch data from the Mediterranean coasts of mainland Spain, France, Italy and Turkey. Reconstructed catches were 2.6 times higher than those submitted to the FAO by these countries in the 1950s, and 1.8 times higher since 2000. If discarded by-catch is ignored they were 2.3 and 1.6 times higher, respectively. The contributors to the reconstructed catch from 1950 to 2010 were large-scale industrial fisheries (46%), discards (29%), artisanal fisheries (10%), recreational fisheries (9%) and subsistence fisheries (6%). The non-reported catch was high in all fishing sectors, including industrial, artisanal and recreational fisheries. The non-inclusion of discards in national and FAO statistics undermines the transition to ecosystem-based fisheries management, but needs to be overcome, as discards must be tracked before discarding itself is eliminated. The systematic underestimation of small-scale fisheries is part of a global phenomenon that will have to be overcome if the potential of these fisheries for sustainable exploitation of coastal systems is to be realized, perhaps in the context of reducing overall fishing capacity, which is excessive in the Mediterranean Sea as elsewhere in the world.Keywords: Mediterranean Sea; discards; unreported; industrial; artisanal; recreational; subsistence; fisheries; IUU fishing.Contraste entre las capturas pesqueras "declaradas" y "probables" en cuatro países mediterráneos Resumen: Se compararon las estadísticas de capturas pesqueras que los países miembros declaran anualmente a la Organización de las Naciones Unidas para la Agricultura y la Alimentación (FAO) para los años 1950 a 2010, con las capturas "reconstruidas" (y más probables) de las costas mediterráneas (excluyendo las islas) de España, Francia, Italia y Turquía. Las capturas reconstruidas fueron 2,6 veces superiores a los datos enviados a la FAO por estos países en la década de 1950, y 1,8 veces desde 2000, o 2,3 y 1,6 veces, respectivamente, sin tener en cuenta los descartes. Las capturas reconstruidas fueron obtenidas del sector industrial (es decir, pesca comercial de gran escala, con un 46 % de la captura total de 1950 a 2010), los descartes (29 %), la pesca artesanal (es decir, pesca comercial de pequeña escala, 10%), la pesca recreativa ( 9 %) y la de subsistencia ( 6 %). Por lo tanto, a pesar de que las capturas no declaradas fueron importantes en todos los sectores pesqueros, incluyendo la pesca industrial, artesanal y recreativa, la no inclusión de los descartes en las estadísticas nacionales y de la FAO va en detrimento de la transición hacia la aplicación de una gestión pesquera basada en el ecosistema. Esto debe corregirse ya que el descarte debe ser documentado antes de que la práctica de descartar pueda ser eliminada. En cuanto a la subestimación sistemática de la pesca de pequeña esca...

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“…This has resulted in recommendations to reduce fishing effort and capacity in most Mediterranean fleets (e.g., Ulman et al, 2013;Maouel et al, 2014;Maynou et al, 2014;Dereli et al, 2015;Merino et al, 2015;Samy-Kamal et al, 2015a,b). However, previous fishing effort and capacity reductions in the Mediterranean have proven insufficient.…”

Section: Discussionmentioning

confidence: 99%

Untitled

Guillén¹,

Maynou²

2016

Turk. J. Fish. Aquat. Sci.

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Fuel price increases have been identified as a major factor explaining the low economic performance of fishing fleets. Fishers have reacted by reducing costs and increasing fuel efficiency of their vessels when possible, and by reducing the days spent at sea or ceasing activity. However, fuel prices explain only part of the story. We analyzed the evolution of fuel prices, fish prices, fishing activity and productivity over a 14 year period (2000-13) for the Catalan fleet (Spanish Mediterranean). Most fish prices have increased but below inflation, or even decreased, in recent years. These low fish prices, together with low vessel productivity, mainly due to the poor status of the stocks, have worsened the already poor profitability of the sector and led to a decrease in the activity (in terms of total effort and capacity).

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From bonito to anchovy: a reconstruction of Turkey’s marine fisheries catches (1950-2010)

Cited by 44 publications

References 28 publications

Evolution of Future Black Sea Fish Stocks under Changing Environmental and Climatic Conditions

Evolution of Future Black Sea Fish Stocks under Changing Environmental and Climatic Conditions

‘Reported’ versus ‘likely’ fisheries catches of four Mediterranean countries

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