Lymnea truncatula (Mollusca Lymnaeidae) in the rice fields of eastern Spain.

Snail sampling in the rice fields surrounding the lake of the Albufera Natural Park (Valencia, Spain) has revealed the presence of six aquatic Snail species: Lymnaea truncatula, L. palustris, L. peregra, L. auricularia, Gyraulus sinensis and Physella acuta. This is the first report of L. auricularia in this geographical zone. A qualitative description of the habitats of L. truncatula in the rice fields during the year is givin, and a quantitative study is made of the relative abundance of each snail species per square meter, and of L. truncatula density at the different prospecting points is made, during all seasons of the year. The results confirm the presence of L. truncatula in the rice fields throughout the year, with the exception of April and September - during human activity in the fields (agricultural tilling and burning practices) - and August, when the fields naturally dry out.