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Behavioural and temporal partitioning of dolphin social groups in the northern Adriatic Sea

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Genov_2018_Behavioural_temporal_part_MB_166_CC.pdf (2.213Mb)
Date
01/2019
Author
Genov, Tilen
Centrih, Tina
Kotnjek, Polona
Hace, Ana
Keywords
GC Oceanography
QH301 Biology
NDAS
Metadata
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Abstract
Complex social structure is a prominent feature in several mammal species. Such structure may lead to behavioural diversity not only among populations, but also within a single population, where different subsets of a population may exhibit different types of behaviour. As a consequence, understanding social structure is not only interesting biologically, but may also help conservation and management efforts, because not all segments of a population necessarily respond to or interact with human activities in the same way, or at the same time. In this study, we examined the social structure of common bottlenose dolphins (Tursiops truncatus) in the Gulf of Trieste and adjacent waters (northern Adriatic Sea), based on a 9-year dataset, using social network metrics and association indices. We assessed whether different segments of the population show differences in behaviour and interactions with fisheries. Dolphin social network was structured into distinct social clusters of mixed sexes. We found no evidence of male alliances. The two largest social clusters overlapped spatially, but not temporally, as they used the same area at different times of day. Such diel temporal partitioning does not appear to have been documented in cetaceans previously. The two clusters also differed in ways they interact with fisheries, as one regularly interacted with trawlers, while the other did not. This study demonstrates how different segments of animal populations can interact differently with human activities and in turn respond differently to anthropogenic impacts.
Citation
Genov , T , Centrih , T , Kotnjek , P & Hace , A 2019 , ' Behavioural and temporal partitioning of dolphin social groups in the northern Adriatic Sea ' , Marine Biology , vol. 166 , no. 1 , 166 . https://doi.org/10.1007/s00227-018-3450-8
Publication
Marine Biology
Status
Peer reviewed
DOI
https://doi.org/10.1007/s00227-018-3450-8
ISSN
0025-3162
Type
Journal article
Rights
© The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/16710

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