Data on the distribution and concentration of anthropogenic
debris in the Río de la Plata are from Acha et al. (2003). Anthropogenic
debris (plastic bags, cans, bottles and hard plastic pieces)
were collected from 1996 to 2001 using a bottom trawl net operated
at 269 stations arranged in a random sampling design that
covered most part of the estuary (Acha et al., 2003).