Can Mediterranean cephalopod stocks be managed at MSY by 2020? The Balearic Islands as a case study

According to the Common Fisheries Policy (CFP), all European fish stocks should be brought to a state where they can produce at MSY by 2015 wherever possible or by 2020 at the latest. Despite the high socio-economical importance of cephalopods in the Mediterranean and the increased availability of stock assessments during the recent past, only few European cephalopod stocks have been assessed to date. Surplus production models were applied to analyse the exploitation state of octopus and cuttlefish stocks from the Balearic Islands (western Mediterranean) to estimate how far away they were from the MSY target established by the CFP using a long-term data series (1977–2013). The stocks were overexploited (cuttlefish) or about to be overexploited (octopus) during the late 1970s; this state remains even now and will only recover from overexploitation by 2020 if severe measures are taken.

[1]  Anthony D. M. Smith,et al.  Fishery Management: Contrasts in the Mediterranean and the Atlantic , 2014, Current Biology.

[2]  G. Tserpes,et al.  The Alarming Decline of Mediterranean Fish Stocks , 2014, Current Biology.

[3]  A. Quetglas,et al.  Influence of environmental parameters on the life-history and population dynamics of cuttlefish Sepia officinalis in the western Mediterranean , 2014 .

[4]  S. Kavadas,et al.  Advances in Fishing Power: A Study Spanning 50 Years , 2014 .

[5]  Olivier Guyader,et al.  Estimating MSY and MEY in multi-species and multi-fleet fisheries, consequences and limits: an application to the Bay of Biscay mixed fishery , 2013 .

[6]  S. Monserrat,et al.  Synchronous combined effects of fishing and climate within a demersal community , 2013 .

[7]  Francesco Colloca,et al.  Rebuilding Mediterranean fisheries: a new paradigm for ecological sustainability , 2013 .

[8]  A. Proelss,et al.  The EU Common Fisheries Policy in light of the precautionary principle , 2012 .

[9]  F. Ordines,et al.  Stock boundaries for fisheries assessment and management in the Mediterranean: the Balearic Islands as a case study , 2012 .

[10]  M. Haddon,et al.  Modelling climate‐change‐induced nonlinear thresholds in cephalopod population dynamics , 2010 .

[11]  Murdoch K. McAllister,et al.  Bayesian state-space modelling of the De Lury depletion model: strengths and limitations of the method, and application to the Moroccan octopus fishery , 2010 .

[12]  G. Pierce,et al.  Cephalopod biology and fisheries in Europe , 2010 .

[13]  J. Link,et al.  Accounting Explicitly for Predation Mortality in Surplus Production Models: An Application to Longfin Inshore Squid , 2009 .

[14]  Yongjun Tian Interannual–interdecadal variations of spear squid Loligo bleekeri abundance in the southwestern Japan Sea during 1975–2006: Impact of the trawl fishing and recommendations for management under the different climate regimes , 2009 .

[15]  S. Mackinson,et al.  Mixed-fishery or ecosystem conundrum? Multispecies considerations inform thinking on long-term management of North Sea demersal stocks , 2009 .

[16]  Miquel Palmer,et al.  Performance of artificial neural networks and discriminant analysis in predicting fishing tactics from multispecific fisheries , 2009 .

[17]  G. Pierce,et al.  A review of cephalopod–environment interactions in European Seas , 2008, Hydrobiologia.

[18]  D. Beare,et al.  Sustainable Management of Mixed Demersal Fisheries in the North Sea through Fleet-based Management - a Proposal from a Biological Perspective , 2007 .

[19]  Bernard A. Megrey,et al.  Using multi-species surplus production models to estimate ecosystem-level maximum sustainable yields , 2006 .

[20]  H. Okamura,et al.  Stock assessment of the autumn cohort of neon flying squid (Ommastrephes bartramii) in the North Pacific based on past large-scale high seas driftnet fishery data , 2006 .

[21]  A. Mannini,et al.  Biology and fishery of Eledone cirrhosa in the Ligurian Sea , 2006 .

[22]  F. González-Laxe The precautionary principle in fisheries management , 2005 .

[23]  J. Wood,et al.  Understanding octopus growth: patterns, variability and physiology , 2004 .

[24]  Alexis Tsangridis,et al.  Exploitation patterns of Octopus vulgaris in two Mediterranean areas , 2002 .

[25]  D. Butterworth,et al.  Assessment of the South African chokka squid Loligo vulgaris reynaudii: Is disturbance of aggregations by the recent jig fishery having a negative impact on recruitment? , 2000 .

[26]  M. Dunn Aspects of the stock dynamics and exploitation of cuttlefish, Sepia officinalis (Linnaeus, 1758), in the English Channel , 1999 .

[27]  P. Sartor,et al.  The importance of cephalopods to trawl fisheries in the western Mediterranean , 1998 .

[28]  P. Merella,et al.  Biology and fishery of Octopus vulgaris Cuvier, 1797, caught by trawlers in Mallorca (Balearic Sea, Western Mediterranean) , 1998 .

[29]  G. Pierce,et al.  Stock assessment methods used for cephalopod fisheries , 1994 .

[30]  G. Pierce,et al.  Environmental effects on cephalopod population dynamics: implications for management of fisheries. , 2014, Advances in marine biology.

[31]  Osio Giacomo Chato,et al.  Report of the Scientific, Technical and Economic Committee for Fisheries (STECF) - 2013 Assessment of Mediterranean Sea stocks part I(STECF 13-22) , 2013 .

[32]  Michael H. Prager,et al.  User's Guide for ASPIC: A Stock-Production Model Incorporating Covariates (ver. 5) And Auxiliary Programs , 2013 .

[33]  W. Howarth The Interpretation of "Precaution" in the European Community Common Fisheries Policy. , 2008 .

[34]  Á. Guerra ECOLOGY OF SEPIA OFFICINALIS , 2006 .

[35]  J. Robin,et al.  Stock assessments of English Channel loliginid squids: updated depletion methods and new analytical methods , 2002 .