The Alarming Decline of Mediterranean Fish Stocks

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The Alarming Decline of Mediterranean Fish Stocks Paraskevas Vasilakopoulos, Christos D. Maravelias, George Tserpes  Current Biology  Volume 24, Issue 14, Pages 1643-1648 (July 2014) DOI: 10.1016/j.cub.2014.05.070 Copyright © 2014 Elsevier Ltd Terms and Conditions

Figure 1 Geographical Subareas of the Mediterranean and Black Seas Thin black lines indicate the borders of the 30 Mediterranean and Black Sea GSAs established by the GFCM. Bold black lines indicate the division into west, central, and east areas, which was performed for this study. The map illustrating the GFCM GSAs was retrieved from http://www.gfcm.org/gfcm/en. Current Biology 2014 24, 1643-1648DOI: (10.1016/j.cub.2014.05.070) Copyright © 2014 Elsevier Ltd Terms and Conditions

Figure 2 Temporal Development of the Exploitation Rate, Selectivity, and Biomass of Mediterranean Fish Stocks (A–C) The temporal development of relative exploitation rate (A), selectivity (B), and standardized spawning stock biomass (C) of European Mediterranean and Black Sea fish stocks. Grey dots indicate annual observations for each stock. Bold black lines indicate the average values over all stocks by year. Gray dashed line on (A) indicates the exploitation rate limit (F/FMSY = 1), and gray dashed line on (B) indicates the relA50 = 0 y value, corresponding to As50 being equal to Am50. See also Table S1 and Figure S1. Current Biology 2014 24, 1643-1648DOI: (10.1016/j.cub.2014.05.070) Copyright © 2014 Elsevier Ltd Terms and Conditions

Figure 3 Effect of Different Combinations of Exploitation Rate and Selectivity on the Long-Term SSB of Simulated Hake, Red Mullet, Sardine, and Anchovy Stocks (A–D) Grayscale contour plots indicate the percentage of virgin SSB remaining after 100 years of exploitation of simulated stocks of hake (A), red mullet (B), sardine (C), and anchovy (D) in response to F and relA50 (see Supplemental Experimental Procedures). Green dashed lines indicate the position of the 30% contour, which corresponds to the value considered as a safe biological limit in data-limited stocks [19]. Numbers indicate relA50 and F combinations of empirical stocks (average values of the last three available years) and refer to the GSA where each stock is found (Figure 1; Table S2). Orange indicates west stocks. Red indicates central stocks. Blue indicates east stocks. Current Biology 2014 24, 1643-1648DOI: (10.1016/j.cub.2014.05.070) Copyright © 2014 Elsevier Ltd Terms and Conditions

Figure 4 Effect of Different Combinations of Exploitation Rate and Selectivity on the Long-Term Yield of Simulated Hake, Red Mullet, Sardine, and Anchovy Stocks (A–D) Grayscale contour plots indicate the relative yield extracted on the 100th year after the beginning of exploitation from simulated stocks of hake (A), red mullet (B), sardine (C), and anchovy (D) in response to F and relA50 (see Supplemental Experimental Procedures). Relative yield has been obtained by dividing Y by its maximum value [17]. Green dashed lines indicate the position of the 90% contour, marking the border of the area where the highest decile of relative yields is produced. Numbers indicate relA50 and F combinations of empirical stocks (average values of the last three available years) and refer to the GSA where each stock is found (Figure 1; Table S2). Orange indicates west stocks. Red indicates central stocks. Blue indicates east stocks. Current Biology 2014 24, 1643-1648DOI: (10.1016/j.cub.2014.05.070) Copyright © 2014 Elsevier Ltd Terms and Conditions