INVESTIGADORES
RODRIGUES CAPITULO Alberto
artículos
Título:
ECOLOGY OF THE NON-NATIVE SNAIL SINOTAIA CF. QUADRATA (CAENOGASTROPODA: VIVIPARIDAE). A STUDY IN A LOWLAND STREAM OF SOUTH AMERICA WITH DIFFERENT WATER QUALITIES.
Autor/es:
FERREIRA, A.C.; PAZ, L.E.; RUMI, A.; OCON, C.S.; ALTIERI, P.D.; RODRIGUES CAPÍTULO A.
Revista:
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.
Editorial:
ACAD BRASILEIRA DE CIENCIAS
Referencias:
Lugar: Rio de Janeiro; Año: 2017 p. 1059 - 1072
ISSN:
0001-3765
Resumen:
Sinotaia quadrata is a snail native from Asia that was recorded as a non-native species in a low-mountain zone of central Argentina in 2009. In November 2015, individuals of this species were also found in a lowland stream, about 700 km away from the first record region. Our aims were to describe and compare the individuals from the two locations anatomically and to contribute to the knowledge of its poorly-known population ecology. Snails were searched at 6 sites, where physicochemical and hydraulic parameters were measured. At the sites where species was present (S3 and S4), biological samples were also taken in summer and autumn 2016 to study the mollusk fauna and the population traits of S. quadrata (density, size structure, fecundity and sex ratio), and to assess the water quality at each site through macroinvertebrates? biological indices (richness, diversity and IBPamp, a regional biotic index). Anatomical differences observed in the radula and mantle border between the individuals found in the mountain and lowland regions were attributed to the environmental differences. Physicochemical and biological parameters allowed us classifying sites as ?moderately polluted? (S3) and ?heavily polluted? (S4). At S4, the population showed lower density, larger individuals, scarce representation of young snails and higher fecundity. We conclude that this species is tolerant to a wide range of environmental variables which, along with its high fecundity and morphological plasticity, could allow this species to colonize neighbor streams. Future monitoring studies will provide information about the dispersion of this snail and its impact on the biodiversity of the already colonized environments