Important at-sea areas of colonial breeding marine predators on the Southern Patagonian Shelf

Baylis, A. M.M. et al. (2019) Important at-sea areas of colonial breeding marine predators on the Southern Patagonian Shelf. Scientific Reports, 9, 8517. (doi: 10.1038/s41598-019-44695-1) (PMID:31186455) (PMCID:PMC6560117)

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The Patagonian Shelf Large Marine Ecosystem supports high levels of biodiversity and endemism and is one of the most productive marine ecosystems in the world. Despite the important role marine predators play in structuring ecosystems, areas of high diversity where multiple predators congregate remains poorly known on the Patagonian Shelf. Here, we used biotelemetry and biologging tags to track the movements of six seabird species and three pinniped species breeding at the Falkland Islands. Using Generalized Additive Models, we then modelled these animals’ use of space as functions of dynamic and static environmental indices that described their habitat. Based on these models, we mapped the predicted distribution of animals from both sampled and unsampled colonies and thereby identified areas where multiple species were likely to overlap at sea. Maximum foraging trip distance ranged from 79 to 1,325 km. However, most of the 1,891 foraging trips by 686 animals were restricted to the Patagonian Shelf and shelf slope, which highlighted a preference for these habitats. Of the seven candidate explanatory covariates used to predict distribution, distance from the colony was retained in models for all species and negatively affected the probability of occurrence. Predicted overlap among species was highest on the Patagonian Shelf around the Falkland Islands and the Burdwood Bank. The predicted area of overlap is consistent with areas that are also important habitat for marine predators migrating from distant breeding locations. Our findings provide comprehensive multi-species predictions for some of the largest marine predator populations on the Patagonian Shelf, which will contribute to future marine spatial planning initiatives. Crucially, our findings highlight that spatially explicit conservation measures are likely to benefit multiple species, while threats are likely to impact multiple species.

Item Type:Articles
Additional Information:This manuscript forms part of the South Atlantic Environmental Research Institute’s GAP project, an initiative of the Falkland Islands Offshore Hydrocarbons Environmental Forum, funded by the Falkland Islands Government and Falkland Islands Petroleum Licensees Association.
Glasgow Author(s) Enlighten ID:Wakefield, Dr Ewan
Authors: Baylis, A. M.M., Tierney, M., Orben, R. A., Warwick-Evans, V., Wakefield, E., Grecian, W. J., Trathan, P., Reisinger, R., Ratcliffe, N., Croxall, J., Campioni, L., Catry, P., Crofts, S., Boersma, P. D., Galimberti, F., Granadeiro, J., Handley, J., Hayes, S., Hedd, A., Masello, J. F., Montevecchi, W. A., Pütz, K., Quillfeldt, P., Rebstock, G. A., Sanvito, S., Staniland, I. J., and Brickle, P.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Scientific Reports
Publisher:Nature Research
ISSN (Online):2045-2322
Published Online:11 June 2019
Copyright Holders:Copyright © The Authors 2019
First Published:First published in Scientific Reports 9:8517
Publisher Policy:Reproduced under a Creative Commons license

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