Castro, J. (José)

Silva, C. (Cristina)

English

Repositorio Institucional Digital del IEO

SHARING KNOWLEDGE FOR SUSTAINABLE FIHSERIES Mixed fisheries forecasts for  Iberian stocks José Castro Cristina Silva Iberian fishing resources in Atlantic waters Scientific_name FAO code Engraulis encrasicolus ANE Scomber scombrus MAC Trachurus trachurus HOM Octopus vulgaris OCC Merluccius merluccius HKE Sardina pilchardus PIL Scomber japonicus MAS Parapenaeus longirostris DPS Micromesistius poutassou WHB Sepia officinalis CTC Conger conger COE Lophius piscatorius MON Solea solea SOL Lepidorhombus spp LEZ Brama brama POA Lophius budegassa ANK Penaeus kerathurus TGS Loligo spp SQC Diplodus sargus SWA Dicologlossa cuneata CET Palaemon serratus CPR Dicentrarchus labrax BSS Necora puber LIO Nephrops norvegicus NEP Trisopterus luscus BIB VIIIcIXaRestrictions on fishing forNorway lobster (GALICIA)Restrictions on fishing forNorway lobster (PORTUGAL)Trawl closure  (Reg CE nº 850/98)Trawl closure  (Reg. CE nº 850/98)Trawl closure   (Reg. CE nº 724/2001)GULF of CADIZ         (different effort regime)36373839404142434445D8 D9 E0 E1 E2 E3 E4 E5 E6 E7 E8 E912 11 10 9 8 7 6 5 4 3 2 1 0010203040506070809101112131415161718     Measures for the recovery of Southern hake and Norway lobster stocks  in Cantabrian Sea and Western Iberian       (Reg. CE Nº 2166/2005)Mixed fisheries forecast method used by ICES Fcube method: a multi-stock deterministic forecast prediction method applied to the North Sea single species advice for demersal fish and Nephrops since 2010 (WGMIXFISH). Fcube requirements: • Population parameters by stock: N, F, M, weight and maturity ogive. • Commercial data disaggregated by métier and fleet segment (in order to better parameterize technical interactions). Theoretically, available since DCF application (2009). In practice, not. • Management objectives: CFP TAC regime, management plans…  Iberian stocks with ICES advice FAO Stock  Area  Assessment Reference points ANK Black anglerfish southern stock VIIIc-IXa  Analytical (ASPIC)   Relative value HKE Hake southern stock VIIIc-IXa  Analytical (GADGET)   FMSY = 0.24 HOM Horse mackerel western stock II-VIII Analytical (ADAPT) FMSY=0.13  Horse mackerel southern stock IXa  Analytical (AMISH)    (FMSY proposal= 0.11) LDB  Four-spot megrim VIIIc-IXa  Analytical (XSA)   FMSY=0.18  MAC Mackerel I-IX  Analytical (ICA)  FMSY = 0.22 MEG Megrim southern stock VIIIc-IXa  Analytical (XSA)   FMSY=0.17  MON White anglerfish southern stock VIIIc-IXa  Analytical (SS3)   FMSY = 0.19 NEP Nephrops FU25  VIIIc  Qualitative NO Nephrops FU26/27  IXa  Qualitative NO Nephrops FU28/29  IXa  Qualitative NO Nephrops FU30  IXa  Qualitative NO Nephrops FU31 VIIIc  Qualitative NO  WHB  Blue whiting (WHB)  I-XIV  Analytical (SAM)  FMSY = 0.18  Atlantic Iberian métiers Métier DCF Definition ES PT GNS_DEF_60-79_0_0 Set gillnet directed to demersal fish (60-79 mm) X GNS_DEF_80-99_0_0 Set gillnet directed to demersal fish (80-99 mm) X GNS_DEF_>=100_0_0 Set gillnet directed to demersal fish (at least 100 mm) X GTR_DEF_60-79_0_0 Trammel net directed to demersal fish (60-79 mm) X   LHM_DEF_0_0_0 Hand line directed to demersal fish X   LLS_DEF_0_0_0 Set longline directed to demersal fish X MIX_polyvalent Selection of the Portuguese polyvalent fleet with catches from the stocks included in the analysis X OTB_CRU_>=55_0_0 Bottom otter trawl directed to crustaceans (at least 55 mm)   X OTB_DEF_>=55_0_0 Bottom otter trawl directed to demersal fish (at least 55 mm) X X OTB_MCD_>=55_0_0 Bottom otter trawl directed to crustaceans and demersal fish (at least 55 mm) X   OTB_MPD_>=55_0_0 Bottom otter trawl directed to pelagic and demersal fish (> 55 mm) X   PS_SPF_0_0_0 Purse seine directed to small pelagic fish X X PTB_ MPD _>=55_0_0 Pair bottom trawl directed to pelagic and demersal fish (> 55 mm) X   Data compiled under the GEPETO project Métiers fishing the 5 stocks selected (13): Parameterization of technical interactions PSX DTS HOK DFN PGP HOM9 MEG MON HKE LDB METIERS FLEETS STOCKS DFN: drift and/or fixed netters DTS: demersal trawlers HOK: vessels using hooks PGP: polyvalent artisanal fleet PSX: purse seiners HKE: hake HOM9: southern horse mackerel LDB: four-spot megrim MEG: megrim MON: white anglerfish • MAX: fishing stops when all quota species are fully utilized achieving the highest single TAC). • MIN: fishing stops when the catch for the lowest quota species is achieved. • HKE: all fleets set their effort at the level corresponding to their hake quota share, regardless of other stocks. • Fsq: effort was set as equal to the most recently recorded year (2012). • MP: effort was adjusted according to the effort management regime  currently implemented in Atlantic Iberian waters.  Management scenarios (WGMIXFISH 2013) Results: reproduction of single-stock forecasts Year HKE HOM9 LDB MEG MON test 17951 24452 1807 236 1232 2013 ICES 19640 24000 1807 236 1330 % difference -9.4 1.8 0.0 -0.1 -8.0 2014 test ICES % difference 11834 36772 1911 250 1291 13123 35000 1957 300 1476 -10.9 4.8 -2.4 -19.9 -14.3 Results: multi-TAC versus single-TAC -100% -50% 0% 50% 100% 150% MAX MIN HKE Fsq MP HKE HOM9 LDB MEG MON Landings/ ICES advice 2014 Results: Effort predicted vs. effort observed -100% -80% -60% -40% -20% 0% 20% 40% 60% MAX MIN HKE Fsq MP gillnet trawl long line polyvalent purse seine Effort predicted/ Effort observed MAIN CONCLUSIONS Iberian mixed-fisheries forecast:  • Stocks:  Stocks assessed by length needs further revision: HKE and MON.  Inconsistencies between LDB and MEG results (could be mgw8c9a part of mgw78ab?) • Fleets/Métiers:  Time-consuming compilation which can be improved with InterCatch. • Method:  Fcube: shows the TAC-TAE relationships. • Management:  Current MP must include other stocks and better match TAC and TAE measures. NEXT STEPS Next steps:  • To update the deterministic Fcube analysis with WGBIE2014 and WGHANSA2014 results (WGMIXFISH2014, next October).  • To investigate stochastic approaches:  the data compiled by the GEPETO project were provided to MyFish project in order to apply the FLBEIA method. 

Mixed fisheries forecasts for Iberian stocks

Castro, José

Silva, Cristina

Digital.CSIC

http://www.repositorio.ieo.es/e-ieo/bitstream/10508/2237/1/WD_WGBIE2014_iberian_mixed_fisheries.pdf

Mixed fisheries forecasts for Iberian stocks

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