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Feeding behavior of A. biplicata in control snails and individuals fed on Cd-contaminated cookies. The photographs illustrate the three categories of feeding (F), poor feeding (PF), and non-feeding (NF) in control (Co) and Cd-exposed snails (Cd1, Cd10, Cd25, Cd100, and Cd200) (for exact definition of feeding groups, see text). Cd exposure groups were defined as shown in the legend of Figure 1.
