Elisa L. Bravo Rebolledo

TL;DR: In future records of interactions between marine debris and wildlife, it is recommended to focus on standardized data on frequency of occurrence and quantities of debris ingested, to allow more detailed assessments of the deleterious effects of marine debris on individuals and populations.

TL;DR: Standardized techniques, approaches and metrics for reporting debris ingestion that are applicable to most large marine vertebrates are discussed and proposed, with the aim of harmonizing the data that are available to facilitate large-scale comparisons and meta-analyses of plastic accumulation in a variety of taxa.

TL;DR: The observed level of incidence of plastic ingestion by phocid seals is of environmental concern, but is low in the sense of suitability of seals for MSFD monitoring purposes.

TL;DR: Most polymers resisted potassium hydroxide (KOH) solution, with the exceptions of cellulose acetate from cigarette filters, some biodegradable plastics and a single polyethylene sheet, confirming that usage of KOH solutions can be a useful approach in general quantitative studies of plastic ingestion by marine wildlife.

TL;DR: The main findings are reported, including a discussion on the research needs, the main methodological gaps, an overview of new techniques for detecting the effects of marine litter (including microplastics) on marine mammals and the use of citizen science to drive awareness.