Cetaceans as Ocean Health Indicators of Marine Litter Impact at Global Scale

• Published in: Frontiers in Environmental Science
• Main Authors: Maria Cristina Fossi, Matteo Baini, Mark Peter Simmonds
• Format: Article in Journal/Newspaper
• Language: English
• Published: Frontiers Media S.A. 2020
• Subjects: cetaceans; marine litter; microplastics; ocean health; indicators; research perspectives; Environmental sciences; GE1-350; Balaenoptera physalus; Physeter macrocephalus
• Online Access: https://doi.org/10.3389/fenvs.2020.586627; https://doaj.org/article/5aeb42bf5bbd4c18bfa631ce50261ff7

Marine litter is a growing concern for marine animals, including cetaceans for which there is a developing body of evidence showing impacts of both entanglement and ingestion. Better understanding is needed of the current and predicted scales of impacts on cetacean species of both macro- and micro-litter. Some emerging methodological approaches, such as the “threefold approach,” will help address data gaps. The relationship between this form of pollution and some cetaceans is strong and the particular feeding habits, and widespread distribution of two whale species means that they can be proposed as ocean health indicators for macro- and micro-litter impacts at global scales, helping steer research. The species concerned are sperm whales (Physeter macrocephalus), for macro-litter at depth, and fin whales (Balaenoptera physalus), for micro-debris. Once appropriate techniques have been fully developed for non-lethal assessment, other whale species might also be used as indicators of litter pollution in their specific feeding zones.