Invasion risks posed by ornamental freshwater fish trade to southeastern Brazilian rivers

By A. Lincoln, B. Magalhães, C. Jacobi. 2013

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A model was developed to assess the risk of invasion of ornamental non-native fishes to six rivers in the state of Minas Gerais ,southeastern Brazil, with focus on species popularity. Thirty-nine aquarium shops, in six cities, were visited monthly fromJanuary to December 2007. In each city, fish species were identified, and their biology and invasion history information wasobtained from the literature. We calculated the annual frequency of occurrence and average number of specimens monthlyavailable in stores. Quarterly water temperature and dissolved oxygen data from 1997 to 2007 were obtained for the Velhas,Muriae, Uberabinha, Sapucai-Mirim, Doce and Todos os Santos Rivers from public databases. The invasion risk of each specieswas assessed through a model comprising nine parameters grouped in four variables: (i) Invasiveness (thermal and dissolvedoxygen ranges, diet, parental care or fecundity), (ii) History of invasions (establishment), (iii) Propagule pressure (commerci alsuccess, comprising annual frequency of occurrence and number of specimens available monthly at stores), and (iv) Invasibility(water temperature and dissolved oxygen in the target river compatible with the species ranges). Of the 345 ornamental fishspecies for sale, 332 are non-native to either Minas Gerais (n = 151) or Brazil (n = 194). Based on the proposed cutting values , inparticular the compatibility between species and recipient thermal ranges, five ornamental non-native species (

Subfields: Aquatic Science, Nature and Landscape Conservation

View Paper: https://www.semanticscholar.org/paper/7a3828f0c709159c8c1a65df7cc04c140edea449

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In Aquatic Science

  1. R. Castro

In Nature and Landscape Conservation

  1. R. Castro

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