期刊
MARINE POLLUTION BULLETIN
卷 62, 期 8, 页码 1836-1841出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.05.003
关键词
Marine pollution; Pontoporia blainvillei; Plastic debris ingestion; Coastal cetacean; Incidental captures; Argentina
资金
- Universidad Nacional de Mar del Plata [15/E271]
- Agencia Nacional de Promocion Cientifica y Tecnologica de Argentina [PICT 07-00000-01651, PICT99-0107111, PICTO-567-4]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 5849, 11220100100348]
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. (C) 2011 Elsevier Ltd. All rights reserved.
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