Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/135317
Title: Seabird biomonitoring indicates similar plastic pollution throughout the Canary Current
Authors: Sobrino-Monteliu, María
Navarro Molina, Alberto 
Rodríguez, Beneharo
Tejera, Gustavo
Herrera, Alicia 
Rodríguez, Airam
UNESCO Clasification: 2401 Biología animal (zoología)
240119 Zoología marina
251005 Zoología marina
Keywords: Bioindicator
Canary Current
Marine debris
Microplastic
Isotopic niche, et al
Issue Date: 2025
Journal: Marine Pollution Bulletin 
Abstract: Marine plastic pollution is an emerging global threat for biodiversity. Plastic ingestion is one of the most typical and studied consequences with petrels being a particularly vulnerable group. We studied the plastic ingestion by Cory's shearwater (Calonectris borealis) fledglings in three islands of the Canarian Archipelago (Tenerife, Gran Canaria and Lanzarote). Breeders from different islands show substantial spatial segregation in their foraging areas across the Canary Current Large Marine Ecosystem (CCLME), a critical marine biodiversity hotspot and an important fishing ground in the North Atlantic Ocean. Here, we used a combination of plastic ingestion parameters (number, maximum length, type and colour of plastics) and stable isotopes (δ13C and δ15N) to study potential differences in plastic ingestion loads and trophic niche between three colonies. Our findings reveal a high incidence of plastic ingestion (>90 %) among birds from the three islands. However, although adult birds show foraging and trophic niche segregation across the CCLME, no substantial differences were found in plastic ingestion. White and transparent threadlike fragments were predominantly ingested, likely originating from fishing activities in the CCLME. We provide a baseline for monitoring of plastic pollution in the CCLME and highlight Cory's shearwater as an effective bioindicator of pelagic ecosystems. Our findings emphasize the need for more standardized plastic monitoring programs covering other islands, and for management measures in the fishing activities conducted in the CCLME.
URI: http://hdl.handle.net/10553/135317
ISSN: 0025-326X
DOI: 10.1016/j.marpolbul.2024.117424
Source: Marine Pollution Bulletin [ISSN 0025-326X], v. 211, 117424, (Febrero 2025)
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