Feeding habits of Guiana dolphins, Sotalia guianensis, from south-eastern Brazil: New items and a knowledge review

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorLopes, Xênia Moreira
dc.creatorDa Silva, Ednilson
dc.creatorBassoi, Manuela
dc.creatorDos Santos, Roberta Aguiar
dc.creatorDe Oliveira Santos, Marcos César
dc.date2014-05-27T11:27:17Z
dc.date2016-10-25T18:39:58Z
dc.date2014-05-27T11:27:17Z
dc.date2016-10-25T18:39:58Z
dc.date2012-12-01
dc.date.accessioned2017-04-06T02:03:49Z
dc.date.available2017-04-06T02:03:49Z
dc.identifierJournal of the Marine Biological Association of the United Kingdom, v. 92, n. 8, p. 1723-1733, 2012.
dc.identifier0025-3154
dc.identifier1469-7769
dc.identifierhttp://hdl.handle.net/11449/73790
dc.identifierhttp://acervodigital.unesp.br/handle/11449/73790
dc.identifier10.1017/S0025315412000495
dc.identifier2-s2.0-84868600156.pdf
dc.identifier2-s2.0-84868600156
dc.identifierhttp://dx.doi.org/10.1017/S0025315412000495
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/894575
dc.descriptionThis study presents new information on feeding habits of Guiana dolphins, Sotalia guianensis, in south-eastern Brazil, together with new regression equations to evaluate the weight and length of fish from otoliths, showing an overview on the knowledge about this species-diet in this area. Eighteen stomach contents had been analysed and compared to 180 samples collected in another eight feeding studies. The analysed specimens were either incidentally caught in gillnets used in coastal waters by the fleet based in the Cananéia main harbour (25°00âS 47°55âW), south of São Paulo State, or found dead in inner waters of the Cananéia estuary between 2003 and 2009. Based on the index of relative importance analysis, the most important fish species were the banded croaker, Paralonchurus brasiliensis. Doryteuthis plei was the most representative cephalopod species. Stellifer rastrifer was the most important fish species observed in dolphins in inner estuarine waters and P. brasiliensis in recovered dolphins from coastal waters. Loliguncula brevis is the only cephalopod species reported from dolphins found in inner estuarine waters up to date. Doryteuthis plei was the most important cephalopod species observed in coastal dolphins. When considering other feeding studies, the most representative fish family in the diet of S. guianensis was Sciaenidae, which is mainly represented by demersal fishes. The main preys of S. guianensis are abundant in the studied areas, which may indicate an opportunistic feeding habit. The majority of them are not the most important target species by the commercial fishery in south-eastern Brazil. © 2012 Marine Biological Association of the United Kingdom.
dc.languageeng
dc.relationJournal of the Marine Biological Association of the United Kingdom
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBrazil
dc.subjectCetacea
dc.subjectfeeding habits
dc.subjectGuiana dolphin
dc.subjectSotalia guianensis
dc.subjectcephalopod
dc.subjectcommercial species
dc.subjectdemersal fish
dc.subjectdolphin
dc.subjectfeeding behavior
dc.subjectgillnet
dc.subjectotolith
dc.subjectperciform
dc.subjectstomach content
dc.subjectCananeia Estuary
dc.subjectSao Paulo [Brazil]
dc.subjectCephalopoda
dc.subjectLoligo
dc.subjectParalonchurus brasiliensis
dc.subjectPisces
dc.subjectSciaenidae
dc.subjectStellifer rastrifer
dc.titleFeeding habits of Guiana dolphins, Sotalia guianensis, from south-eastern Brazil: New items and a knowledge review
dc.typeOtro


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