Castro, J. (José)

Da-Rocha, J.M.

García, D.

García, F.J.

Gutiérrez, M.J.

Prellezo, R.

Sampedro-Pastor, P. (Paz)

English

Prellezo, R. (Raúl)

Da-Rocha, J.M. (José María)

Repositorio Institucional Digital del IEO

Bio-­‐economic	  mul,-­‐stock	  reference	  points	  as	  a	  tool	  to	  overcome	  the	  drawbacks	  	  of	  landing	  obliga,on	  	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  D.	  	  Garcia,	  R.	  Prellezo,	  P.	  Sampedro,	  J.M.	  Da	  Rocha,	  J.	  Castro,	  S.	  Cerviño,	  	  F.J.	  Garcia	  and	  M.J.Gu?errez	  The	  Case	  Study	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  The	  	  Area	  The image cannot be displayed. Your computer may not Megrim H.Mackerel (South) Megrim 4 Spot The	  Stocks	  The	  Fleets	  Trawl	  ﬂeets	  	  (Spain	  &	  Portugal)	  Spanish	  Gillne;ers	  Spanish	  vessels	  using	  hooks	  &	  lines	  Purse	  Seine	  ﬂeets	  	  (Spain	  &	  Portugal)	  Portuguese	  Polivalent	  Mo?va?on	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  Would	  mul?-­‐stock	  reference	  points	  produce	  more	  consistent	  single	  stock	  TAC	  advices	  	  and	  hence	  	  mi?gate	  the	  nega?ve	  economic	  eﬀects	  of	  landing	  obliga?on	  policy?	  The	  approach	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  FLBEIA	  bio-­‐economic	  management	  strategy	  evalua?on	  (MSE)	  soMware	  FLR	  Stock	  Dynamics	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  Hake,	  Megrims,	  Monkﬁsh	  and	  Horse	  Mackerel	  •  Exponen?al	  survival	  equa?on	  +	  Stock	  recruitment	  rela?onship.	  •  Uncertainty	  in	  Recruitment:	  lognormal	  mul?plica?ve	  error.	  	  	  Rest	  of	  the	  stocks	  •  Biomass	  ﬁxed	  along	  the	  simula?on.	  	  •  Blue	  Whi?ng,	  Mackerel	  and	  Western	  Horse	  Mackerel’s	  biomass	  equal	  to	  mean	  biomass	  in	  years	  2010-­‐2012.	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  •  Tradi,onal:	  Eﬀort	  share	  along	  me?ers	  equal	  to	  historical	  average	  .	  •  Proﬁt	  Maximiza,on:	  The	  eﬀort	  share	  and	  total	  eﬀort	  along	  me?ers	  is	  such	  that	  maximizes	  the	  proﬁts	  in	  each	  ?me	  step.	  	  Ø Landing	  Obliga,on:	  None	  of	  the	  quotas	  can	  be	  exceeded	  	  	  •  Number	  of	  vessels	  are	  updated	  for	  each	  ﬂeet	  every	  year	  depending	  on	  the	  economic	  proﬁtability	  of	  the	  ﬂeet.	  	  •  Even	  if	  the	  ﬂeet	  is	  proﬁtable,	  if	  it	  is	  not	  employing	  its	  full	  capacity,	  number	  of	  vessels	  are	  not	  increased.	  	  •  The	  entry	  and	  exit	  of	  vessels	  is	  restricted	  to	  3%	  a	  year.	  Fleets	  Dynamics	  Short	  Term	  Long	  Term	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  •  Data	  and	  assessment	  simulated	  without	  error.	  •  ICES	  Harvest	  Control	  Rule:	  Two	  sets	  of	  reference	  points:	  •  ICES	  MSY	  Reference	  Points	  •  Mul?-­‐Stock	  reference	  points	  calculated	  using	  a	  bio-­‐economic	  op?miza?on	  model.	  SSB	F  advice	Btrigger  	FMSY	SSB  x  FMSY/Btrigger  	Blim  	Management	  Procedure	  ICES 	  MSMSYHake 0.24 0.43H.Mackerel 0.11 0.07Megrim	   0.17 0.114	  Spot	  Megrim 0.18 0.16Monkfish 0.19 0.11Scenarios	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  •  8	  scenarios:	  Each	  scenario	  above	  was	  run	  with	  two	  diﬀerent	  ﬂeet	  dynamics,	  tradi?onal	  and	  proﬁt	  maximiza?on.	  •  Simula?on	  period:	  2015-­‐2025	  •  Landing	  obliga?on	  applies	  from	  2018	  for	  all	  the	  stocks.	  Reference	  PointsOfficial Multi	  Stock	  Landing	  ObligationNO ices msmsyYes ices_lo msmsy_lo29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  oﬃcial	  msmsy	  ices	  msmsy	  ices_lo	  msmsy_lo	  Reference	  Points	  Scenarios	  Fishing	  Mortality	  in	  2025	  Tradi,onal	  	  Fleet	  Dynamics	  Proﬁt	  Maximiza,on	  Fleet	  Dynamics	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  ices	  msmsy	  ices_lo	  msmsy_lo	  Scenarios	  Proﬁts	  Tradi,onal	  Dynamics	  Proﬁt	  Maximiza,on	  Dynamics	  Long	  Term	  Quota	  Uptake	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  Tradi,onal	  Dynamics	  Proﬁt	  Maximiza,on	  Dynamics	  ices	  msmsy	  ices_lo	  msmsy_lo	  Scenarios	  Eﬀort	  Share	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  ices	  msmsy	  ices_lo	  msmsy_lo	  Scenarios	  Net	  Present	  Value	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  Fleet	  DynamicsLanding	  ObligationReference	  Point EurosDifference	  with	  current	  managementices 556 -­‐msmsy 597 107%ices 517 93%msmsy 558 100%ices 888 -­‐msmsy 969 109%ices 778 88%msmsy 870 98%NoYesNoYesTraditionalProfit	  MaxmizationConclusions	  •  Under	  landing	  obliga?on	  ﬁshing	  opportuni?es	  are	  lost	  for	  all	  the	  stocks.	  	  •  The	  eﬀect	  of	  landing	  obliga?on	  and	  mul?-­‐stock	  reference	  points	  depended	  on	  the	  ﬂeet,	  the	  ﬂeet	  dynamics	  and	  the	  ?me	  period.	  	  •  At	  ﬁshery	  level,	  mul?-­‐stock	  reference	  points	  could	  neutralized	  the	  nega?ve	  impact	  of	  landing	  obliga?on.	  	  •  Landing	  obliga?on	  and	  mul?stock	  reference	  points	  impact	  posi?vely	  in	  the	  most	  selec?ve	  ﬂeets	  (Hookers).	  	  •  The	  loss	  in	  ﬁshing	  opportuni?es	  of	  stocks	  not	  subject	  to	  quota	  system	  is	  key	  to	  the	  economic	  performance	  of	  the	  ﬂeet.	  	  •  The	  ﬂeets	  that	  can	  change	  their	  catch	  proﬁles	  to	  improve	  the	  consump?ons	  of	  their	  quotas	  are	  less	  aﬀected	  by	  the	  policy.	  	  	  29/10/2015,	  ICES	  SYMPOSIUM	   www.myﬁshproject.eu	  	  Thank	  you	  for	  your	  aXen,on!	  	  	  Email:	  	  	  Dorleta	  Garcia:	  dgarcia@az?.es	  Raúl	  Prellezo:	  rprellezo@az?.es	  	  Ευχαριστίες!!	  	  	  Thank	  you!!	  

Bio-­economic multi‐stock reference points as a tool to overcome the drawbacks of landing obligation

Bio-economic multi‐stock reference points as a tool to overcome the drawbacks of landing obligation

Abstract

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Repositorio Institucional Digital del IEO

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Bio-­economic multi‐stock reference points as a tool to overcome the drawbacks of landing obligation

Abstract

Similar works

Full text

Available Versions

Repositorio Institucional Digital del IEO

Digital.CSIC

Bio-economic multi‐stock reference points as a tool to overcome the drawbacks of landing obligation