Spatiotemporal use predicts social partitioning of bottlenose dolphins with strong home range overlap
| Autor: | Pedro F. Fruet, Luciana M. Möller, Rodrigo Cezar Genoves, Juliana C. Di Tullio, Eduardo R. Secchi |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Home range Population spatiotemporal dynamics Spatial distribution 010603 evolutionary biology 01 natural sciences gregariousness Social group Social analysis education affiliation Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Original Research education.field_of_study Ecology biology Social network spatial distribution business.industry 010604 marine biology & hydrobiology social group Bottlenose dolphin biology.organism_classification Geography social division business |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Ranging behaviour and temporal patterns of individuals are known to be fundamental sources of variation in social networks. Spatiotemporal dynamics can both provide and inhibit opportunities for individuals to associate, and should therefore be considered in social analysis. This study investigated the social structure of a Lahille's bottlenose dolphin (Tursiops truncatus gephyreus) population, which shows different spatiotemporal patterns of use and gregariousness between individuals. For this, we constructed an initial social network using association indices corrected for gregariousness and then uncovered affiliations from this social network using generalized affiliation indices. The association‐based social network strongly supported that this dolphin population consists of four social units highly correlated to spatiotemporal use patterns. Excluding the effects of gregariousness and spatiotemporal patterns, the affiliation‐based social network suggested an additional two social units. Although the affiliation‐based social units shared a large part of their core areas, space and/or time use by individuals of the different units were generally distinct. Four of the units were strongly associated with both estuarine and shallow coastal areas, while the other two units were restricted to shallow coastal waters to the south (SC) and north of the estuary (NC), respectively. Interactions between individuals of different social units also occurred, but dolphins from the NC were relatively more isolated and mainly connected to SC dolphins. From a conservation management perspective, it is recommended that information about the dolphin social units should be incorporated in modeling intrapopulation dynamics and viability, as well as for investigating patterns of gene flow among them. |
| Databáze: | OpenAIRE |
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