Get access

Invasive dynamics of the crayfish Procambarus clarkii (Girard, 1852) in the international section of the River Minho (NW of the Iberian Peninsula)

Authors

  • Ronaldo Sousa,

    Corresponding author
    1. Centre of Molecular and Environmental Biology, University of Minho, Braga, Portugal
    • Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
    Search for more papers by this author
  • Fabiana E. P. Freitas,

    1. Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
    2. Departamento de Biologia and CESAM, Universidade de Aveiro, Aveiro, Portugal
    Search for more papers by this author
  • Micaela Mota,

    1. Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
    Search for more papers by this author
  • António J. A. Nogueira,

    1. Departamento de Biologia and CESAM, Universidade de Aveiro, Aveiro, Portugal
    Search for more papers by this author
  • Carlos Antunes

    1. Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
    2. Aquamuseum of the Minho River, Vila Nova de Cerveira, Portugal
    3. ESG – University School Gallaecia, Vila Nova de Cerveira, Portugal
    Search for more papers by this author

Correspondence to: R. Sousa, CIMAR-LA/CIIMAR - Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal. Email: ronaldo.sousa@ciimar.up.pt

ABSTRACT

  1. Procambarus clarkii (Girard, 1852) is a well-established invasive species in many worldwide aquatic ecosystems and is responsible for several ecological and economic impacts. This study examines the major factors responsible for its invasive dynamics in the international section of the River Minho (north-west Iberian Peninsula).
  2. Data collected from June 2007 to May 2011 showed that abundance and biomass increased in the first 3 years of sampling, but suffered a decrease in the fourth year. Higher abundance and biomass were always found from May to October. These higher values have a clear relationship with water temperature and probably reflect higher activity and mobility.
  3. The sex-ratio was 1.08:1 in favour of females; eggs start to appear in May/June and the majority of juveniles in August/September.
  4. Information collected in this study is extremely important for future management actions that could be applied to this invasive species. Accordingly, we propose that control actions to minimize P. clarkii impacts in this system, such as intensive trapping, should be applied during late spring/early summer, when the catches are higher, the females are dominant, and before juvenile recruitment.

Copyright © 2013 John Wiley & Sons, Ltd.

Ancillary