Occurrence of Cymbasoma longispinosum Bourne, 1890 (Copepoda: Monstrilloida) in the Curuçá River estuary (Amazon Littoral)

Anais da Academia Brasileira de Ciências

Natália R. Leite²  Luci C.c. Pereira¹  Fernando Abrunhosa¹  Marcus A.b. Pires¹  Rauquírio M. Da Costa² 

[1] ,Universitário de Bragança Instituto de Estudos Costeiros Laboratório de Plâncton e Cultivo de MicroalgasBragança PA ,Brasil

关键词: Amazon region;    Monstrilloida;    new occurrence;    tropical estuary;    Região Amazônica;    Monstrilloida;    novaocorrência;    estuário tropical;   

DOI  :  10.1590/S0001-37652010000300005

来源: SciELO

【 摘 要 】

The present work was carried out to verify the occurrence and distribution of Cymbasoma longispinosum Bourne, 1890 in a tropical Amazon estuary from North Brazil. Samplings were performed bimonthly from July/2003 to July/2004 at two different transects (Muriá and Curuçá rivers) situated along the Curuçá estuary (Pará, North Brazil). Samples were collected during neap tides via gentle (1 to 1.5 knots) 200 μm-mesh net tows from a small boat. Additional subsurface water samples were collected for the determination of environmental parameters. Males and females of Cymbasoma longispinosum were only observed during September and November/2003. The highest number of organisms was found in September/2003 at the Muriá River transect. The presence of C. longispinosum in samples obtained during September and November/2003 could probably be related to the reproductive period of this species in the studied estuary, which is directly related to the dry period in the region. The highest salinity values and the highest number of individuals observed in September/2003 corroborate with the previous assumption, since no C. longispinosum was found during the months comprising the rainy period (January to June).

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