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Spatio-temporal study and population structure of Daptoneam oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio de Janeiro, Brazil

Author
Organization
Abstract
Daptonema oxycerca was originally described from the North Sea and, up to now, nothing is known of this species in tropical regions. The spatio-temporal distribution and the population structure of this species was studied during one-year period (from May 1998 through April 1999) in Coroa Grande, Rio de Janeiro, Brazil. For sampling, two fixed, parallel transects were established perpendicularly to the shoreline, and at each transect, four, equally spaced levels were marked to represent the upper and the low intertidal zones. The lowest temperatures Occurred in the end of the austral winter and first month of the spring and the highest temperatures occurred in the austral summer. The density of D. oxycerca varied during the year, with a peak in August. This tendency was observed for males, ovigerous females, and non-ovigerous females. The species density was negative correlated with temperature. The sex ratio was not statistically significant. D. oxycerca was most abundant at the upper intertidal level in both transects. This work provides the first record of D. oxycerea in Brazil, and confirms the influence of temperature in regulating its population density.
Keywords
FREE-LIVING NEMATODES, MARINE NEMATODES, ASSEMBLAGES, Sepetiba Bay, population structure, MEIOFAUNA, TEMPERATURE, MANGROVE, DYNAMICS, ECOLOGY, marine nematodes, Daptonema

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Chicago
Maria, Tatiana, Neyvan R. R. da Silva, Adriane P. Wandeness, and Andre M. Esteves. 2008. “Spatio-temporal Study and Population Structure of Daptoneam Oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio De Janeiro, Brazil.” Brazilian Journal of Oceanography 56 (1): 41–50.
APA
Maria, T., da Silva, N. R. R., Wandeness, A. P., & Esteves, A. M. (2008). Spatio-temporal study and population structure of Daptoneam oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio de Janeiro, Brazil. BRAZILIAN JOURNAL OF OCEANOGRAPHY, 56(1), 41–50. Presented at the 1st Brazilian Congress of Marine Biology.
Vancouver
1.
Maria T, da Silva NRR, Wandeness AP, Esteves AM. Spatio-temporal study and population structure of Daptoneam oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio de Janeiro, Brazil. BRAZILIAN JOURNAL OF OCEANOGRAPHY. 2008;56(1):41–50.
MLA
Maria, Tatiana, Neyvan R. R. da Silva, Adriane P. Wandeness, et al. “Spatio-temporal Study and Population Structure of Daptoneam Oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio De Janeiro, Brazil.” BRAZILIAN JOURNAL OF OCEANOGRAPHY 56.1 (2008): 41–50. Print.
@article{745626,
  abstract     = {Daptonema oxycerca was originally described from the North Sea and, up to now, nothing is known of this species in tropical regions. The spatio-temporal distribution and the population structure of this species was studied during one-year period (from May 1998 through April 1999) in Coroa Grande, Rio de Janeiro, Brazil. For sampling, two fixed, parallel transects were established perpendicularly to the shoreline, and at each transect, four, equally spaced levels were marked to represent the upper and the low intertidal zones. The lowest temperatures Occurred in the end of the austral winter and first month of the spring and the highest temperatures occurred in the austral summer. The density of D. oxycerca varied during the year, with a peak in August. This tendency was observed for males, ovigerous females, and non-ovigerous females. The species density was negative correlated with temperature. The sex ratio was not statistically significant. D. oxycerca was most abundant at the upper intertidal level in both transects. This work provides the first record of D. oxycerea in Brazil, and confirms the influence of temperature in regulating its population density.},
  author       = {Maria, Tatiana and da Silva, Neyvan R. R. and Wandeness, Adriane P. and Esteves, Andre M.},
  issn         = {1679-8759},
  journal      = {BRAZILIAN JOURNAL OF OCEANOGRAPHY},
  keyword      = {FREE-LIVING NEMATODES,MARINE NEMATODES,ASSEMBLAGES,Sepetiba Bay,population structure,MEIOFAUNA,TEMPERATURE,MANGROVE,DYNAMICS,ECOLOGY,marine nematodes,Daptonema},
  language     = {eng},
  location     = {Rio de Janeiro, Brazil},
  number       = {1},
  pages        = {41--50},
  title        = {Spatio-temporal study and population structure of Daptoneam oxycerca (Nematoda: Xyalidae) in Coroa Grande, Rio de Janeiro, Brazil},
  volume       = {56},
  year         = {2008},
}

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