Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/41755
Title: Supplemental feeding and other anthropogenic threats to green turtles (Chelonia mydas) in the Canary Islands
Authors: Monzon-Arguello, Catalina 
Cardona, Luis
Calabuig, Pascual
Camacho, Maria 
Crespo-Picazo, José Luis
García-Párraga, Daniel
Mayans, Santiago
Luzardo, Octavio P. 
Orós, Jorge 
Varo-Cruz, Nuria
UNESCO Clasification: 3109 Ciencias veterinarias
310906 Nutrición
Keywords: East Atlantic
Mitochondrial DNA
Stable isotopes
Satellite tracking
Biochemistry, et al
Issue Date: 2018
Journal: Science of the Total Environment 
Abstract: Green turtles are found in the waters of the Canary Islands but little is known about the ecology and anthropogenic pressures that threaten them. Our results have revealed that juvenile green turtles, ranging in curve carapace length from 26.9-81.0 cm, are regularly found in the archipelago and originate from rookeries in both the eastern and western Atlantic. Photo-identification and satellite tracking showed high levels of site fidelity to coastal foraging grounds associated with seagrass meadows, but stable isotope analysis indicated animal-based omnivorous diets after settlement on the continental shelf, with no increase in the consumption of macrophytes as the turtles grew. Most turtles exhibited high levels of some blood biochemical markers associated with a high consumption of proteins and fat. In addition, we determined levels of some organic and inorganic pollutants. Supplemental feeding may also contribute to explain the high prevalence of hooking and boat strikes in the green turtles brought to wildlife rescue centers as compared with loggerhead turtles. Regulatory measures and surveillance should be urgently implemented in order to improve the status of the species in the archipelago.
URI: http://hdl.handle.net/10553/41755
ISSN: 0048-9697
DOI: 10.1016/j.scitotenv.2017.10.126
Source: Science of the Total Environment [ISSN 0048-9697], v. 621, p. 1000-1011
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