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dc.contributor.authorKoched, W. (Wael)es_ES
dc.contributor.authorHattour, A. (Abdallah)es_ES
dc.contributor.authorAlemany, F. (Francisco) es_ES
dc.contributor.authorZarrad, R. (Rafik)es_ES
dc.contributor.authorGarcía-García, A. (Alberto) es_ES
dc.date.accessioned2014-11-21T10:27:56Z
dc.date.available2014-11-21T10:27:56Z
dc.date.issued2012es_ES
dc.identifier.urihttp://hdl.handle.net/10508/8463
dc.description.abstractEarly life stages of tuna species were investigated along the Tunisian east coast during the summer of 2008 by means of a larval survey conducted on board the R/V HANNIBAL. In this study we define the spawning grounds of tuna fishes in Tunisian waters and relate the tuna larvae spatial distribution to the hydrographic features and other environmental parameters. A total of 282 larvae of Atlantic bluefin tuna (Thunnus thynnus, Linnaeus, 1758), 902 of bullet tuna (Auxis rochei, Risso, 1810) and 19 of little tuna (Euthynnus alletteratus, Raf, 1810), were identified. High larval concentrations of bluefin tuna were located offshore (mean = 200 ± 18 m), at sea surface temperatures ranging between 23.7 to 25.3°C, whereas the highest concentrations of bullet and little tuna were located in shallower waters (mean = 135 ± 75 m), at sea surface temperature ranging between 25.1 to 25.9°C. According to their preference for waters with surface salinities ranging between 37.1 and 37.8, spawning of these species seems to occur mainly in mixed waters. Stations where tuna larvae were collected showed oxygen concentrations between 6.55 and 6.85 mg l-1, as well as low turbidity and chlorophyll a values, from 0.2 to 0.5 NTU a d less than 1 mg m-3, respectively. These three environmental factors were weakly correlated with tuna larvae abundanceen_US
dc.language.isoengen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Españaes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/es_ES
dc.subjectTuna larvaeen_US
dc.subjectSpatial distributionen_US
dc.subjectSpawning habitaten_US
dc.subjectEnvironmental parametersen_US
dc.subjectTunisian watersen_US
dc.subjectCentral Mediterraneanen_US
dc.titleDistribution of tuna larvae in Tunisian east coasts and its environmental scenarioes_ES
dc.typeresearch articlees_ES
dc.identifier.bibliographicCitationCahiers de Biologie Marine, 53. 2012: 505-515es_ES
dc.publisher.centreCentro Oceanográfico de Baleareses_ES
dc.rights.accessRightsclosed accesses_ES
dc.description.impact1es_ES
dc.coverage.spatialStudyMediterranean Seaen_US
dc.coverage.spatialStudyCentral Mediterranean Seaen_US


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    Atribución-NoComercial-SinDerivadas 3.0 España
    Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España