Plastic debris (PD) ingestion was examined in 106 Franciscana dolphins (Pontoporia blainvillei) incidentally
captured in artisanal fisheries of the northern coast of Argentina. Twenty-eight percent of the
dolphins presented PD in their stomach, but no ulcerations or obstructions were recorded in the digestive
tracts. PD ingestion was more frequent in estuarine (34.6%) than in marine (19.2%) environments, but the
type of debris was similar. Packaging debris (cellophane, bags, and bands) was found in 64.3% of the dolphins,
with a lesser proportion (35.7%) ingesting fishery gear fragments (monofilament lines, ropes, and
nets) or of unknown sources (25.0%). PD ingestion correlated with ontogenetic changes in feeding
regimes, reaching maximum values in recently weaned dolphins. Because a simultaneous increase in gillnet
entanglement and the bioaccumulation of heavy metals take place at this stage, the first months after
trophic independence should be considered as a key phase for the conservation of Franciscana dolphin
stocks in northern Argentina
Plastic debris (PD) ingestion was examined in 106 Franciscana dolphins (Pontoporia blainvillei) incidentally
captured in artisanal fisheries of the northern coast of Argentina. Twenty-eight percent of the
dolphins presented PD in their stomach, but no ulcerations or obstructions were recorded in the digestive
tracts. PD ingestion was more frequent in estuarine (34.6%) than in marine (19.2%) environments, but the
type of debris was similar. Packaging debris (cellophane, bags, and bands) was found in 64.3% of the dolphins,
with a lesser proportion (35.7%) ingesting fishery gear fragments (monofilament lines, ropes, and
nets) or of unknown sources (25.0%). PD ingestion correlated with ontogenetic changes in feeding
regimes, reaching maximum values in recently weaned dolphins. Because a simultaneous increase in gillnet
entanglement and the bioaccumulation of heavy metals take place at this stage, the first months after
trophic independence should be considered as a key phase for the conservation of Franciscana dolphin
stocks in northern Argentina
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