Recruits from farmed ABFT in Murcia ?

GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY ICCATMADRID , 26‐28NOVEMBER2018 Recruits from farmed ABFT in Murcia? , Recruits  from  farmed  ABFT  in  Murcia?  FernandodelaGándarayAurelioOrtega(IEO) GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega IthasbeendemonstratedatleastintheMurciaarea,thatthecaptiveABFT ( Th th ) f ftt i ti iti dti l ith fi ( Th unnus th ynnus )  f or f a tt en i ngac ti v iti esrepro d uceac ti ve l y i n th e f arm i ng cagesinthenaturalspawningseason(earlyJune– middleJuly). GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega DelaGándara,F.,Mylonas,C.C.,Coves,D.,Bridges,C.R.,(Eds.),2012.SELFDOTTReport2010‐2011,488p. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega GnRHa (6 mg/fish) Ml CC Bid C R Bl t A Gdi H Gi Gó A Fl C Rfld H Mdi A Ci A M y l onas CC ., B r id ges C . R , B e l mon t e A ., G or di n H ., G arc i a‐ Gó mez A ., F auve l C ., R osen f e ld H ., M e di na A ., C orr i ero A ., Demetrio G., Vassallo‐Agius R. and Zohar Y. (2008). Induction of spermiation, ovulation and spawning in Atlantic bluefin tuna (Thunnus thynnus) using GnRHa delivery systems. Proceedings of the EAS 2008 Krakow (Poland), 456‐457 GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega Ml CC Bid C R Bl t A Gdi H Gi Gó A Fl C Rfld H Mdi A Ci A M y l onas CC ., B r id ges C . R , B e l mon t e A ., G or di n H ., G arc i a‐ Gó mez A ., F auve l C ., R osen f e ld H ., M e di na A ., C orr i ero A ., Demetrio G., Vassallo‐Agius R. and Zohar Y. (2008). Induction of spermiation, ovulation and spawning in Atlantic bluefin tuna (Thunnus thynnus) using GnRHa delivery systems. Proceedings of the EAS 2008 Krakow (Poland), 456‐457 GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega DelaGándara,F.,Mylonas,C.C.,Coves,D.,Bridges,C.R.,(Eds.),2012.SELFDOTTReport2010‐2011,488p. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega Tensofmillionsoffertilizedeggscomingfromthesecageshadbeencollectedinthelastyearsandculturedinthe facilitiesoftheSpanishInstituteofOceanography(IEO)inMazarrón (Murcia,SESpain)andgrownuptojuveniles, demonstratingaswelltheirviability. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega DelaGándara,F.,Mylonas,C.C.,Coves,D.,Bridges,C.R.,(Eds.),2012.SELFDOTTReport2010‐2011,488p. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega TEMPERATURES 28 30 24 26 22 24 ºC 18 20 SURFACE MIDDLE 16 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 / 2010 0:00 BOTTOM 14/06 / 15/06 / 16/06 / 17/06 / 18/06 / 19/06 / 20/06 / 21/06 / 22/06 / 23/06 / 24/06 / 25/06 / 26/06 / 27/06 / 28/06 / 29/06 / 30/06 / 01/07 / 02/07 / 03/07 / 04/07 / 05/07 / 06/07 / 07/07 / 08/07 / 09/07 / 10/07 / 11/07 / 12/07 / 13/07 / 14/07 / 15/07 / 16/07 / 17/07 / 18/07 / 19/07 / 20/07 / 21/07 / 22/07 / 23/07 / 24/07 / date DelaGándara,F.,Mylonas,C.C.,Coves,D.,Bridges,C.R.,(Eds.),2012.SELFDOTTReport2010‐2011,488p. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega PICCINETTI,C.,DINATALE,A.,&ARENA,P. (2013).Easternbluefin tuna(Thunnus thynnus,l.)reproduction andreproductiveareasandseason.CollectiveVolumeofScientificPapersICCAT,69(2),891–912. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega Bluefin (T.thynnus)andbullettuna(A.rochei)larvalcatchesofthe2011MEDIASsurvey. GARCIA, A., LAIZ, R., QUINTANILLA, J., CORREGIDOR, F., & ALEMANY, F. (2013). Report on abundant bluefin larval concentrations (Thunnus thynnus) found off the shelf/slope area in the Spanish levantine coasts. Signs of recovery? Collective Volume of Scientific Papers ICCAT, 69(1), 292–296. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega brailer GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega ABFT PRODUCTION IN MURCIA REGION 6000 7000 ABFT  PRODUCTION  IN  MURCIA  REGION 4000 5000 2000 3000 MT 1000 2000 0 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 years Jacumar,2018 https://www.mapa.gob.es/es/pesca/temas/acuicultura/junta‐asesora‐de‐cultivos‐marinos/ GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega AROUGHCALCULATION Medina et al, 2007. Relative fecundity : 702 .000 eggs / Kg ABFT fl ti d i ti it iMi10 6 k ABFT  f ema l es man t a i ne d i ncap ti v it yeveryyear i n M urc i a: 10 6 k g Number ofeggs produced by aABFTfemales ayear:106eggs /kg Number of ABFT eggs produced in Murcia every year :10 12 kg Number of  ABFT  eggs produced in  Murcia  every year :  10 12 kg  Taking into account that an ABFT female could spawn roughly hundred thousands of eggs per kg during all the spawning season and thousands of thousands of eggs per kg during all the spawning season and thousands of tones of ABFT adults have been farmed in the Murcia coast during the last years, the total fertilized eggs could reach hundreds of billions every year. Gordoa,A.(2011).Aproximaciónalimpactosobreelreclutamientodelatúnrojo(Thunnus thynnus)delas capturasdecercoenBalearesconelactualperiododeveda.CollectiveVolumeofScientificPapersICCAT, 66(2),835–838. Medina,A.,Abascal,F.,Aragón,L.,Mourente,G.,Aranda,G.,Galaz,T.,Belmonte,A.,DelaSerna,M.,& García,S.(2007).Influenceofsamplinggearinassessmentofreproductiveparametersforbluefin tunain thewesternMediterranean.MarineEcologyProgressSeries,337,221–230. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega Ob i l th diti i th Mi t diff t f th tl i t l Ob v i ous l y th econ diti ons i n th e M urc i acoas t are diff eren t o f th ena t ura l spawn i ng areas no t on l y regarding the feeding availability but also the massive presence of many egg and larvae predators. Gordoa, A., Acuña, J. L., Farrés, R., & Bacher, K. (2013). Burst Feeding of Pelagia noctiluca ephyrae on Atlantic Bluefin Tuna (Thunnus thynnus) Eggs. PLoS ONE,8(9), e74721–e74721. https://doi.org/10.1371/journal.pone.0074721 GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega ABFegg Alien egg Alien egg DE LA GANDARA, F., & ORTEGA, A. (2017). Eliminación de huevos de especies no deseadas en puestas de atún rojo (Thunnus thynnus) recogidas en el mar. In Actas del XVI Congreso Nacional de Acuicultura. Zaragoza 3‐5 Octubre 2017: 398‐399 GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega DE LA GANDARA, F., & ORTEGA, A. (2017). Eliminación de huevos de especies no deseadas en puestas de atún rojo (Thunnus thynnus) recogidas en el mar. In Actas del XVI Congreso Nacional de Acuicultura. Zaragoza 3‐5 Octubre 2017: 398‐399 GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega CONCLUSION Taking into account that an ABFT female could spawn roughly hundred thousands of eggs per kg during all the spawning season and thousands of tones of ABFT of eggs per kg during all the spawning season and thousands of tones of ABFT adults have been farmed in the Murcia coast during the last years, the total fertilized eggs could reach hundreds of billions every year. Obviously the conditions in the Murcia coast are different of the natural spawning areas not only regarding the feeding availability but also the massive presence of many egg and larvae predators many egg and larvae predators . It would be recommendable to carry out prospecting surveys in the aim to shed some li g ht on this p ossibleeffectoffarmedABFTontherecruitmentatleastin g p Murcia region. GBYPWORKSHOPONBFTREPRODUCTIVEBIOLOGY,MADRID,26‐28NOVEMBER2018 FernandodelaGándara &AurelioOrtega Many thanks for your attention Many thanks for your attention