Diel changes in embryonic maturation in two species of marine cladocerans in Guanabara Bay, Rio de Janeiro, Brazil

Marazzo, Andrea; Valentin, Jean L.

doi:10.1590/S0101-81752001000500033

Abstract

Two species of marine cladocerans, Penilia avirostris Dana, 1852 and Evadne tergestina Claus, 1877 were collected in thirteen samples at a fixed station in Guanabara Bay, Rio de Janeiro (30-meter depth) by means of vertical tows with a 200 µm mesh size net at different times from September 12th to 15th, 1995. The parthenogenetic females of Evadne tergestina bore mature embryos (with pigmented eye) only in the samples collected at night, whereas Penilia avirostris at any time of day. This phenomenon was interpreted based on the greater visibility of the Evadne tergestina brood: one of the benefits for embryo maturing during the darkness period would be a decrease of predation on gravid females.

Cladocera; Penilia avirostris; Evadne tergestina; zooplankton; embryos; Guanabara Bay; Brazil

SCIENTIFIC COMMUNICATION

Diel changes in embryonic maturation in two species of marine cladocerans in Guanabara Bay, Rio de Janeiro, Brazil

Andrea Marazzo; Jean L. Valentin

Laboratório de Zooplâncton, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro. 21949-900 Rio de Janeiro, Rio de Janeiro, Brasil. E-mail: marazzo@biologia.ufrj.br; jlv@biologia.com.br

ABSTRACT

Two species of marine cladocerans, Penilia avirostris Dana, 1852 and Evadne tergestina Claus, 1877 were collected in thirteen samples at a fixed station in Guanabara Bay, Rio de Janeiro (30-meter depth) by means of vertical tows with a 200 µm mesh size net at different times from September 12^th to 15^th, 1995. The parthenogenetic females of Evadne tergestina bore mature embryos (with pigmented eye) only in the samples collected at night, whereas Penilia avirostris at any time of day. This phenomenon was interpreted based on the greater visibility of the Evadne tergestina brood: one of the benefits for embryo maturing during the darkness period would be a decrease of predation on gravid females.

Key words: Cladocera, Penilia avirostris, Evadne tergestina, zooplankton, embryos, Guanabara Bay, Brazil

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ACKNOWLEDGEMENTS. This research is part of PRONEX project, and was supported by the Coordenadoria de Aperfeiçoamento de Pessoal de Ensino Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Fundação de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ).

Recebido em 15.XII.2000; aceito em 02.VII.2001.

Amador, E.S. 1997. Baía de Guanabara e Ecossistemas Periféricos: Homem e Natureza. Rio de Janeiro, Reproarte Gráfica e Editora, 539p.
Barth, R. 1972. Interrelação entre ambiente e reprodução de Evadne tergestina (Cladocera). Publ. Inst. Pesq. Mar., Rio de Janeiro, 67:1-16.
Bryan, B.B. 1979. The diurnal reproductive cycle of Evadne tergestina Claus (Cladocera, Podonidae) in Chesapeake Bay, USA. Crustaceana 36:229-236.
Della Croce, N. & S. Bettanin. 1965. Sviluppo embrionale della forma partenogenetica de Penilia avirostris Dana. Cah. Biol. Mar. 6:269-275.
Griffths, F.B.; A. Fleminger; B. Kimor & M. Vannucci. 1976. Shipboard and curating techniques, p. 17-19. In: unesco (Ed.) Zooplancton Fixation and Preservation - Monographs on Oceanographies Methodology. Paris, unesco.
Mullin, M.M. & T. Onbé. 1992. Diel reproduction and vertical distributions of the marine cladocerans, Evadne tergestina and Penilia avirostris, in contrasting coastal environments. Jour. Plankton Res. 14:41-59.
Onbé, T. 1974. Studies on the ecology of marine cladocerans. Jour. Fac. Fish. Anim. Husb. Hiroshima Univ. 13:83-179.
______. 1977. The biology of marine cladocerans in warm temperate water, p. 383-393. In: Proceedings of a Symposium on Warm Water Zooplankton. Goa, National Institute of Oceanography, UNESCO, XI+722p.
______. 1999. Ctenopoda and Onychopoda (=Cladocera), p. 797-813. In: D. Boltovskoy (Ed.). South Atlantic Zooplankton. Leiden, Backhuys Publ., XII+1705p.
Zaret, T.M. 1972. Predators, invisible prey, and the nature of polymorphism in the Cladocera (Class Crustacea). Limnol. Oceanogr. 17:171-184.

Publication Dates

Publication in this collection
30 Apr 2009
Date of issue
July 2001

History

Received
15 Dec 2000
Accepted
02 July 2001

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] Amador, E.S. 1997. Baía de Guanabara e Ecossistemas Periféricos: Homem e Natureza. Rio de Janeiro, Reproarte Gráfica e Editora, 539p.

[2] Barth, R. 1972. Interrelação entre ambiente e reprodução de Evadne tergestina (Cladocera). Publ. Inst. Pesq. Mar., Rio de Janeiro, 67:1-16.

[3] Bryan, B.B. 1979. The diurnal reproductive cycle of Evadne tergestina Claus (Cladocera, Podonidae) in Chesapeake Bay, USA. Crustaceana 36:229-236.

[4] Della Croce, N. & S. Bettanin. 1965. Sviluppo embrionale della forma partenogenetica de Penilia avirostris Dana. Cah. Biol. Mar. 6:269-275.

[5] Griffths, F.B.; A. Fleminger; B. Kimor & M. Vannucci. 1976. Shipboard and curating techniques, p. 17-19. In: unesco (Ed.) Zooplancton Fixation and Preservation - Monographs on Oceanographies Methodology. Paris, unesco.

[6] Mullin, M.M. & T. Onbé. 1992. Diel reproduction and vertical distributions of the marine cladocerans, Evadne tergestina and Penilia avirostris, in contrasting coastal environments. Jour. Plankton Res. 14:41-59.

[7] Onbé, T. 1974. Studies on the ecology of marine cladocerans. Jour. Fac. Fish. Anim. Husb. Hiroshima Univ. 13:83-179.

[8] ______. 1977. The biology of marine cladocerans in warm temperate water, p. 383-393. In: Proceedings of a Symposium on Warm Water Zooplankton. Goa, National Institute of Oceanography, UNESCO, XI+722p.

[9] ______. 1999. Ctenopoda and Onychopoda (=Cladocera), p. 797-813. In: D. Boltovskoy (Ed.). South Atlantic Zooplankton. Leiden, Backhuys Publ., XII+1705p.

[10] Zaret, T.M. 1972. Predators, invisible prey, and the nature of polymorphism in the Cladocera (Class Crustacea). Limnol. Oceanogr. 17:171-184.