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

Detalhes bibliográficos
Autor(a) principal: Reigada, Alvaro Luiz Diogo [UNESP]
Data de Publicação: 2001
Outros Autores: Negreiros-Fransozo, Maria Lucia [UNESP]
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1023/A:1017563119813
http://hdl.handle.net/11449/66496
Resumo: The 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.
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spelling Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, BrazilCallinectesDiel rhythmsFeeding activityPortunidaeSwimming crabsCellsDigestive systemFood productsMetabolismNutritionOcean habitatsExtracellular digestionMarine biologyactivity patterncrabfeeding behaviorBrazilBrachyuraCallinectes danaeCallinectes ornatusCrustaceaDanaeDecapoda (Crustacea)MolluscaThe 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.Câmpus do Litoral Paulista UNESP, Praça Infante D. Henrique s/n, São Vicente, SP, 11330-205NEBECC (Group of Studies on Crustacean Biology, Ecology and Culture) Depto. de Zoologia Instituto de Biociências - UNESP, 18618-000 Botucatu (SP)Câmpus do Litoral Paulista UNESP, Praça Infante D. Henrique s/n, São Vicente, SP, 11330-205NEBECC (Group of Studies on Crustacean Biology, Ecology and Culture) Depto. de Zoologia Instituto de Biociências - UNESP, 18618-000 Botucatu (SP)Universidade Estadual Paulista (Unesp)Reigada, Alvaro Luiz Diogo [UNESP]Negreiros-Fransozo, Maria Lucia [UNESP]2014-05-27T11:20:15Z2014-05-27T11:20:15Z2001-04-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject249-252http://dx.doi.org/10.1023/A:1017563119813Hydrobiologia, v. 449, p. 249-252.0018-8158http://hdl.handle.net/11449/6649610.1023/A:1017563119813WOS:0001700598000272-s2.0-0035870210Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengHydrobiologia2.1650,896info:eu-repo/semantics/openAccess2021-10-23T21:44:15Zoai:repositorio.unesp.br:11449/66496Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:31:47.058140Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
title Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
spellingShingle Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
Reigada, Alvaro Luiz Diogo [UNESP]
Callinectes
Diel rhythms
Feeding activity
Portunidae
Swimming crabs
Cells
Digestive system
Food products
Metabolism
Nutrition
Ocean habitats
Extracellular digestion
Marine biology
activity pattern
crab
feeding behavior
Brazil
Brachyura
Callinectes danae
Callinectes ornatus
Crustacea
Danae
Decapoda (Crustacea)
Mollusca
title_short Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
title_full Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
title_fullStr Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
title_full_unstemmed Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
title_sort Feeding activity of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 (Crustacea, Brachyura, Portunidae) in Ubatuba, SP, Brazil
author Reigada, Alvaro Luiz Diogo [UNESP]
author_facet Reigada, Alvaro Luiz Diogo [UNESP]
Negreiros-Fransozo, Maria Lucia [UNESP]
author_role author
author2 Negreiros-Fransozo, Maria Lucia [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Reigada, Alvaro Luiz Diogo [UNESP]
Negreiros-Fransozo, Maria Lucia [UNESP]
dc.subject.por.fl_str_mv Callinectes
Diel rhythms
Feeding activity
Portunidae
Swimming crabs
Cells
Digestive system
Food products
Metabolism
Nutrition
Ocean habitats
Extracellular digestion
Marine biology
activity pattern
crab
feeding behavior
Brazil
Brachyura
Callinectes danae
Callinectes ornatus
Crustacea
Danae
Decapoda (Crustacea)
Mollusca
topic Callinectes
Diel rhythms
Feeding activity
Portunidae
Swimming crabs
Cells
Digestive system
Food products
Metabolism
Nutrition
Ocean habitats
Extracellular digestion
Marine biology
activity pattern
crab
feeding behavior
Brazil
Brachyura
Callinectes danae
Callinectes ornatus
Crustacea
Danae
Decapoda (Crustacea)
Mollusca
description The 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.
publishDate 2001
dc.date.none.fl_str_mv 2001-04-15
2014-05-27T11:20:15Z
2014-05-27T11:20:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1023/A:1017563119813
Hydrobiologia, v. 449, p. 249-252.
0018-8158
http://hdl.handle.net/11449/66496
10.1023/A:1017563119813
WOS:000170059800027
2-s2.0-0035870210
url http://dx.doi.org/10.1023/A:1017563119813
http://hdl.handle.net/11449/66496
identifier_str_mv Hydrobiologia, v. 449, p. 249-252.
0018-8158
10.1023/A:1017563119813
WOS:000170059800027
2-s2.0-0035870210
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Hydrobiologia
2.165
0,896
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 249-252
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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