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Comparing methods for monitoring nest debris using silver gulls as a case study

Henderson, GE, Grant, ML and Lavers, JL ORCID: 0000-0001-7596-6588 2022 , 'Comparing methods for monitoring nest debris using silver gulls as a case study' , Marine Pollution Bulletin, vol. 177 , pp. 1-5 , doi:

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Global plastics production is increasing exponentially and contributing to significant pollution of the marineenvironment. Of particular concern is ingestion and entanglement risks for marine wildlife, including when itemssuch as rope are incorporated into nest structures. These events are commonly documented using photographicand visual surveys, and each presents a number of challenges and benefits for species conservation and monitoring.Here we compare an invasive (i.e., removing debris from nests) and non-invasive (i.e., photographs)sampling method for quantifying nest debris using the silver gull (Chroicocephalus novahollandiae) as a case study.Overall, 17 debris items were detected in 9% of gull nests. While the use of photographs to monitor nest debris isincreasingly popular, the invasive method detected one additional debris item not identified using photography.We therefore recommend caution for nest debris and other monitoring programs where identifying small orcryptic items may require a high level of skill.

Item Type: Article
Authors/Creators:Henderson, GE and Grant, ML and Lavers, JL
Keywords: plastic pollution, nest debris, seabird monitoring, debris detection, method development
Journal or Publication Title: Marine Pollution Bulletin
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 0025-326X
DOI / ID Number:
Copyright Information:

Copyright 2022 Elsevier Ltd.

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