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Length–weight relationship of three annual fishes (Rivulidae) from temporary freshwater wetlands of southern Brazil

Authors

  • M. V. Volcan,

    Corresponding author
    1. Laboratório de Ictiologia, Instituto Pró-Pampa (IPPampa), Pelotas, Brazil
    • Programa de Pós Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
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  • Â. C. Gonçalves,

    1. Programa de Pós Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
    2. Laboratório de Ictiologia, Instituto Pró-Pampa (IPPampa), Pelotas, Brazil
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  • D. L. Guadagnin

    1. Programa de Pós Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria (UFSM), Santa Maria, Brazil
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Author's address: Matheus Vieira Volcan, Ichthyology Laboratory, Instituto Pró-Pampa (IPPampa), Uruguay Street, 1242, Centro, Zip Code 96010-630, Pelotas, Rio Grande do Sul, Brazil.

E-mail: matheusvolcan@hotmail.com

Summary

The present study describes length-weight relationships (LWRs) of three species of the family Rivulidae, Austrolebias nigrofasciatus, Austrolebias wolterstorffi and Cynopoecilus melanotaenia, captured in temporary freshwater wetlands of southern Rio Grande do Sul, Brazil from May to December 2011. The growth pattern for both species was predicted using a linear regression of LWR. Estimates of parameter b ranged from 2.81 in male C. melanotaenia to 3.34 for females A. nigrofasciatus. The present observations are significant for conservation and management because these species are threatened and their habitats are under pressure.

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