Compared to values recorded before 1998 in 57 farms located in three French natural regions, the numbers of snail populations observed in 2016 and 2017 were significantly lower, with an overall decline rate of 30.8% for Galba truncatula and 38.6% for Omphiscola glabra over the past 20 years.
Ann. Limnol. - Int. J. Lim., 54 (2018) 11
Published online: 16 March 2018
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