Fernández-Zapico, O. (Olaya)

Landa, J. (Jorge)

Punzón, A. (Antonio)

Ruiz-Pico, S. (Susana)

Serrano, A. (Alberto)

Velasco, F. (Francisco)

English

Repositorio Institucional Digital del IEO

01/09/20161TRENDS ON THE ONTOGENY OF THE DOMINANT FLATFISH SPECIES ON THE SOUTHERN BAY OF BISCAY:    ECOLOGY AND DISTRIBUTION PATTERNSO. Fernández-Zapico*, A. Punzón, A. Serrano, J. Landa, S. Ruiz-Pico and F. Velasco.Instituto Español de Oceanografía, Centro Oceanográfico de Santander Promontorio de San Martín s/n, 39004. Santander, Spain. 1OUTLINE• INTRODUCTION• AIM• METHODS 1.Study area2.Data source3.Data analysis• RESULTS • DISCUSSION & CONCLUSIONS 2INTRODUCTIONEcological            benthos feedersIntermediariesE transferIMPORTANCEEconomical Bottom qualityindicatorsPREVIOUS STUDIES Distribution commercial flatfish (eg. Sánchez et al., 1998, Sánchez et al., 2001, Gerritsen et al., 2010)Environmental drivers in communities distribution(eg Sullivan et al 2000 Serrano et al 2008)GAP OF KNOWLEDGE.   ., ,   ., •Pleuronectiformes order distribution•Ontogeny•Leading factors3AIMAnalyze the population of the order Pl tif i th N th S i h h lfeuronec ormes n e or ern pan s  s e1 describing its distribution in the area, 2 establishing the leading factors that drive it.3 observing the ontogeny in that distribution.401/09/20162METHODS1.Study area44 46 48 Study areaCantabrian SeaFranceBay of BiscayGalicianwatersFEEPPA ABEstacaPeñas Cape200 1205007044º10 º 5 º 0 º42 SpainPortugalSampling strategyTime-series from 2002 to 2011MFMiño RiverFinisterre Capede Bares Cape  Ajo Cape BidasoaRiver10º 9º 8º 7º 6º 5º 4º 3º 2º42º43º5METHODS 2.Data sourceBiological data•Median particle diameter (Q50,µm) Organic matter (%)Sieving & sedimentationExplanatory variables• Latitude• Longitude •Depth (m)•T (ºC)•S (‰)•   •Sorting coeficient (S0)Combustion6Boscii_s     3-17 cmBoscii_m   18-25 cmBoscii_l      26-44 cm3.Data analysis: Species and length categoriesMETHODSArnoglossus imperialisImperialis_s: 6-12 cm; Imperialis_l: 13-20 cmArnoglossus laterna Buglossidium luteumBuglossidium_s: 7-11 cm; Buglossidium_l: 12-15 cmL. whiffiagonis Lepidorhombus boscii Whiffi_s: 5-20 cmWhiffi_m: 21-29 cmWhiffi_l: 30-53 cmMicrochirus variegatus Laterna_s: 2-10 cm; Laterna_l: 11-18 cmBathysolea profundicola Bathysolea_s: 10-17 cm; Bathysolea_l: 18-23 cmSolea solea Solea_s   11-27 cmSolea_m  28-39 cmSolea_l    40-50 cmMicrochirus_s: 4-12 cm; Microchirus_l: 13-24 cmPegusa lascarisLascaris_s: 19-23 cm; Lascaris_l: 24-37 cm 7METHODSCLUSTER ANALYSIS Associations among species and size groups3.Data analysis: statisticsMANOVA Significance of e.variables in the spp compositionCanonical Correspondance Ordered structure spp and e.variablesAnalysis (CCA) Centers of Gravity Mean value of the variable analized(CoG) weighted to the abundance of the species.niiniii xzxCOG11/)( abundance of the species in the haul iixiz mean value of the environmental variable given 801/09/201630.81.03 main assemblages CLUSTER ANALYSISRESULTSIS M-OSSB_sa_lsolea_msolea_lsolea_sdium_sdium_lboscii_lwhiffi_swhiffi_mwhiffi_l0.40.6 Inner shelf group (IS) P.lascaris, B.luteum, S.soleaMedium and outer shelf group (M-OS)A.laterna, A.imperialis, M.variegatus, L whiffiagonisbathysolea_bathysolealascaris_slascaris_lbuglossidbuglossidlaterna_slaterna_lmicrochirus_smicrochirus_lboscii_sboscii_mimperialis_simperialis_lw0.00.2. ,L. bosciiShelf break and upper slope group(SB)B.profundicola.9Df SumsOfSqs  MeanSqs F.Model      R2   Pr(>F)    RESULTSMANOVA: Importance of Explanatory variables Depth                         1 23.005 23.005 103.630 0.0858   0.001 ***  Q50 1 14.959 14.959 67.385 0.0558   0.001 *** Longitude                   1 7.432 7.432 33.478 0.0277   0.001 *** Latitude                      1 4.473 4.473 20.150 0.0167   0.001 *** Temperature               1 2.132 2.033 9.603 0.0080   0.001 *** Organic Matter           1 1.316 1.316 5.928 0.0049   0.001 *** So                              1 1.219 1.219 5.493 0.0046  0.001 *** Salinity                       1 0.396 0.396 1.785 0.0014   0.051 .   Residuals                    960 213.115 0.211 0.751  Total       968 268.048 1Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 110345bathysolea_sbathysolea_lDepth1RESULTSCCA:  Biological vs.     Explanatory data012CCA2boscii_sboscii_mboscii_lwhiffi_swhiffi_mwhiffi_llaterna slaterna lmicrochirus_smicrochirus_limperialis_simperialis_lLatitudeLongitudeOrganic MatterQ50So0 -6 -4 -2 0 2-2-1CCA1solea_ssolea_msolea_l__buglossidium_sbuglossidium_llascaris_slascaris_l11solea_lsolea_msolea_sbuglossidium_lbuglossidium_slascaris_llascaris_sP.lascarisB.luteumS soleaRESULTSFLATFISH DISTRIBUTION WITH DEPTH (CoG)boscii_mwhiffi_lwhiffi_smicrochirus_smicrochirus_llaterna_simperialis_llaterna_limperialis_sA.laternaM.variegatus. A.imperialisL whiffiagonisbathysolea_lbathysolea_sboscii_sboscii_lwhiffi_m100200300400500600700Depth (m)L.boscii.  B.profundicola (CoG)1201/09/20164FLATFISH DISTRIBUTION WITH SEDIMENT SIZE (CoG) RESULTSM di ti l di te an par c e ame er125-250 µm-> “Fine sands”250-500 µm-> “Middle sands”500-1000 µm-> “Coarse sands”13B f di lRESULTSFLATFISH DISTRIBUTION WITH LONGITUDE AND LATITUDE (CoG)43º44ºL.bosciiL.whiffiagonisA.laternaM.variegatus A.imperialis B luteumP.lascaris.pro un co aS.solea L.whiffiagonis 10º 9º 8º 7º 6º 5º 4º 3º 2º42ºS.soleaA.laternaA.imperialisM.variegatusB.luteumB.profundicolaP.lascaris.14DISCUSSION & CONCLUSIONSIntere-speciesBathymetric segregation AvoidinterspecificStrategy:Resource DepthOntogeny (intra-species)+- 3/9 spp6/9 sppcompetitionpartitioningDiet composition(Piet, 1998)(Sánchez, 1993)1. Depth has been revealed as the main factor in structuring flatfish distribution.**previous papers have explained the bathymetric segregation as a strategy of resource partitioning & avoiding inter-specific competition, on the basis of their diet.2. A positive pattern between ontogeny and depth in 6/9 spp analyzed was found.**this pattern has been confirmed for several flatfish species in other areas. 15DISCUSSION & CONCLUSIONSInter-species Fine sands 8/9 sppA.imperialis Coarse sandsSediment sizeOntogeny (intra-species)3 S di t i h b l d th d f t i t t i fl tfi h di t ib tiAbility to bury f (spp & sizes)           sediment choice(Stoner & Ottmar, 2003)Avoidpredation(Gibson, 2014)+- 3/9 spp6/9 spp. e men  s ze as een revea e  as e secon  ac or n s ruc ur ng a s  s r u on.**Avoiding predation and feeding is considered the main reason for association with sediment; previous studies have related sediment choice with the ability to bury in it as a function of the species and size.4. A positive pattern has been found between ontogeny and sediment size in 6/9 spp analysed.1601/09/20165DISCUSSION & CONCLUSIONSInterespeciesW EL.bosciiA.laterna A.imperialisL.whiffiagonisLongitude &5 Longitude and Latitude are also important factors in structuring flatfish distributionLatitude Ontogeny (intraspecies)No ontogenetic changes,but trend   Fishing mortality?.           .6. These variables differenciate species into the genus Arnoglossus and Lepidorhombus, probably as a consequence of the sediment they are associated.   7. They don’t seem to show ontogenetic changes in relation to latitude and longitude, but they follow a trend, with higher abundance of larger individuals towards the east, maybe as a consequence of a stronger fishing effort in the western area.17Thanks for yourattention18

Trends on the ontogeny of the dominant flatfish species on the southern Bay of Biscay. Ecology and distribution patterns

Fernández-Zapico, Olaya

Punzón, Antonio

Serrano, Alberto

Landa, Jorge

Ruiz-Pico, Susana

Velasco, Francisco

Digital.CSIC

TRENDS ON THE ONTOGENY OF THE DOMINANT FLATFISH SPECIES ON THE SOUTHERN BAY OF BISCAY:  ECOLOGY AND DISTRIBUTION PATTERNS

http://www.repositorio.ieo.es/e-ieo/bitstream/10508/10318/1/Trends%20on%20the%20ontogeny%20of%20the%20dominant%20flatfish%20species%20on%20the%20southern%20Bay%20of%20Biscay.%20Ecology%20and%20distribution%20patterns.pdf

Trends on the ontogeny of the dominant flatfish species on the southern Bay of Biscay. Ecology and distribution patterns

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