Abstract

ARENZON, A.; PERET, A. C.  and  BOHRER, M. B. C.. Growth of the annual fish Cynopoecilus melanotaenia (Regan, 1912) based in a temporary water body population in Rio Grande do Sul State, Brazil (Cyprinodontiformes, Rivulidae). Rev. Bras. Biol. [online]. 2001, vol.61, n.1, pp. 117-123. ISSN 0034-7108.  http://dx.doi.org/10.1590/S0034-71082001000100015.

The growth of the annual fish Cynopoecilus melanotaenia was studied in its natural environment, in order to obtain information about its biology. A total of 797 specimens of C. melanotaenia were collected on a monthly basis between April 1994 and March 1995 in a temporary water body, located in Rio Grande do Sul State, Brazil. The growth curve in total length suggests, to both sexes, a fast initial growth. Males present a smaller growth rate than females, but they attain a higher average maximum length than the females.

Keywords : annual fish; growth; Cynopoecilus melanotaenia; Brazil.