Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorReigada, Alvaro Luiz Diogo
dc.creatorNegreiros-Fransozo, Maria Lucia
dc.date2014-05-27T11:20:15Z
dc.date2016-10-25T18:17:01Z
dc.date2014-05-27T11:20:15Z
dc.date2016-10-25T18:17:01Z
dc.date2001-04-15
dc.date.accessioned2017-04-06T00:59:24Z
dc.date.available2017-04-06T00:59:24Z
dc.identifierHydrobiologia, v. 449, p. 249-252.
dc.identifier0018-8158
dc.identifierhttp://hdl.handle.net/11449/66496
dc.identifierhttp://acervodigital.unesp.br/handle/11449/66496
dc.identifier10.1023/A:1017563119813
dc.identifierWOS:000170059800027
dc.identifier2-s2.0-0035870210
dc.identifierhttp://dx.doi.org/10.1023/A:1017563119813
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/888058
dc.descriptionThe feeding activity along the day cycle and the time consumed for extracellular digestion were evaluated in the portunids C. ornatus and C. danae. Swimming crabs were obtained from trawling in Ubatuba bay, São Paulo, Brazil, during both the rainy and dry seasons. In each season, daily scheduled samples were taken at dawn (±6 h), noon (±12 h), dusk (±18 h) and midnight (±24 h). All individuals were dissected and the degree of stomach replenishment was recorded. In order to estimate the time elapsed for extracellular digestion, crabs were fed, and groups were dissected at 30 min intervals to check the conditions of their stomachs. In general, both species show a higher feeding activity during periods of lower light intensity, as evidenced by an increased percentage of full stomachs in dusk and midnight samples. The obtained results support higher feeding activity at night in these species and indicate short time for extracellular digestion, not exceeding 8 h. Nevertheless, full stomachs were recorded in all sampling schedules. In this case, it should be considered that elimination of certain food items such as fish bones, mollusk shells and carapace fragments of crustaceans could take more time than other items. Additionally, some crab species could require a cycle of cell replacement in the midgut gland epithelium until they can take their next meal.
dc.languageeng
dc.relationHydrobiologia
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCallinectes
dc.subjectDiel rhythms
dc.subjectFeeding activity
dc.subjectPortunidae
dc.subjectSwimming crabs
dc.subjectCells
dc.subjectDigestive system
dc.subjectFood products
dc.subjectMetabolism
dc.subjectNutrition
dc.subjectOcean habitats
dc.subjectExtracellular digestion
dc.subjectMarine biology
dc.subjectactivity pattern
dc.subjectcrab
dc.subjectfeeding behavior
dc.subjectBrazil
dc.subjectBrachyura
dc.subjectCallinectes danae
dc.subjectCallinectes ornatus
dc.subjectCrustacea
dc.subjectDanae
dc.subjectDecapoda (Crustacea)
dc.subjectMollusca
dc.titleFeeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
dc.typeOtro


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