Article
Current distribution of the exotic freshwater snail Helisoma duryi (Gastropoda: Planorbidae) in Brazil
Registro en:
FERNANDEZ, Monica A. et al. Current distribution of the exotic freshwater snail Helisoma duryi (Gastropoda: Planorbidae) in Brazil. The Nautilus., v.124, n.1, p.44-50, 2010.
0028-1344
Autor
Fernandez, Monica A.
Thiengo, Silvana C.
Bezerra, Fernando S. M.
Alencar, Lucia M. S.
Resumen
This article describes the current distribution of the introduced
gastropod Helisoma duryi in Brazil. The species was recorded
for the first time in Brazil in 1972, in Formosa, state of Goia´ s,
and since then it has been reported to occur in the states of
Ceara´ , Minas Gerais, Paraı´ba, Rio de Janeiro, and Sa˜o Paulo.
Recently, this species was found in the state of Ceara´ , where it
was introduced through ornamental fish and aquatic plant
trade. The expansion of the species range in Brazil demonstrates
the need for increased efforts to monitor and control
the introduction of exotic species. Up to now, H. duryi
had been found in 14 municipalities together with specimens
of Ampullariidae, Ancylidae, Corbiculidae, Lymnaeidae,
Planorbidae, Physidae, and Thiaridae. We believe that the
current absence of H. duryi in the localities where it had
been previously collected (1972 and 1998) could be associated
with environmental changes in those regions and also because
selfing in H. duryi is not as efficient as it is for other
Planorbidae species. A map with the distribution of H. duryi is
also provided.