For our analysis,
we used information only on plastic debris (plastic bags and
hard plastic pieces) since it is most frequently consumed by marine
turtles (Bjorndal et al., 1994; Bugoni et al., 2001; Tomás et al.,
2002; Tourinho et al., 2010). Plastic debris was counted and expressed
as number of items per km2. For further details on the
sampling method see Acha et al. (2003).