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Site fidelity and movement patterns of short-finned pilot whales within the Canary Islands : evidence for resident and transient populations

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Servidio_etal_2019_AquatCons_SiteFidelityMovementPilotWhaleCanaryIslands.pdf (528.8Kb)
Date
06/09/2019
Author
Servidio, Antonella
Pérez-Gil, Enrique
Pérez-Gil, Mónica
Cañadas, Ana
Hammond, Philip Steven
Martín, Vidal
Keywords
Archiplelago
Distribution
Environmental impact assessment
Island
Mammals
Ocean
Survey
GC Oceanography
GF Human ecology. Anthropogeography
QH301 Biology
NDAS
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Abstract
1. The geographic location and oceanographic, physical, and chemical water properties make the Canary Islands one of the planet's biodiversity hotspots. The short‐finned pilot whale (Globicephala macrorhynchus) is one of the archipelago's most commonly encountered species and is potentially vulnerable to a range of anthropogenic pressures, including habitat degradation, acoustic pollution, fishing, whale‐watching operations, and shipping. Assessment of impact has not been possible because of a lack of even basic information about occurrence and distribution. 2. Spatial and temporal distributions, ranging behaviour, and residence patterns of short‐finned pilot whales were explored for the first time using survey and photo‐identification data collected in the Canary Islands between 1999 and 2012. In total, 1,081 pilot whale sightings were recorded during 70,620 km of search effort over 1,782 survey days. 3. Pilot whales were detected year round and distributed non‐uniformly within the archipelago, with greater densities concentrated in patchy areas mainly on the leeward side of the main islands. In total, 1,320 well‐marked individuals were identified, which exhibited a large degree of variability in site fidelity. 4. Different but not isolated subpopulations of pilot whales that share ranges and maintain social interactions were apparently present in the Canary Islands. Strong evidence of an island‐associated subpopulation was found, with a group of 50 ‘core resident’ individuals associated particularly with Tenerife. There were also ‘transient’ individuals or temporary migrants, which, probably driven by inter‐ and intra‐specific competition, may travel long distances whilst using the archipelago as part of a larger range. 5. These findings fill a major gap in the knowledge of this species’ occurrence, distribution, movements, and site fidelity in the archipelago and provide much needed data to allow the initiation of informed conservation assessments and management actions.
Citation
Servidio , A , Pérez-Gil , E , Pérez-Gil , M , Cañadas , A , Hammond , P S & Martín , V 2019 , ' Site fidelity and movement patterns of short-finned pilot whales within the Canary Islands : evidence for resident and transient populations ' , Aquatic Conservation: Marine and Freshwater Ecosystems , vol. 29 , no. S1 , pp. 227-241 . https://doi.org/10.1002/aqc.3135
Publication
Aquatic Conservation: Marine and Freshwater Ecosystems
Status
Peer reviewed
DOI
https://doi.org/10.1002/aqc.3135
ISSN
1052-7613
Type
Journal article
Rights
Copyright © 2019 John Wiley & Sons, Ltd. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/aqc.3135
Description
Funding: co-funded by the Canary Government (Consejería de Política Territorial, Sostenibilidad y Seguridad), the Spanish Government (Fundación Biodiversidad and Ministerio de Medio Ambiente, Medio Rural y Marino), Fundación La Caixa, and by a number of international projects funded by EU programmes MACETUS (FEDER/INTERREG III-B MAC/4.2/M10), EMECETUS (FEDER/INTERREG III-B56105/MAC/4.2/M10), LIFE (LIFE03NAT0062), INDEMARES LIFE+ (LIFE07/NAT/E/00732).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/20554

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