Social structure and abundance of coastal bottlenose dolphins,<i>Tursiops truncatus</i>, in the Normano-Breton Gulf, English Channel

Louis, Marie; Gally, François; Barbraud, Christophe; Béesau, Julie; Tixier, Paul; Simon-Bouhet, Benoît; Rest, Kévin Le; Guinet, Christophe

doi:10.1093/jmammal/gyv053

Cited by 26 publications

(32 citation statements)

References 85 publications

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“…There are some examples of bottlenose dolphin populations where, differently from this study, present social structuring with little or even no core area overlap between units (Louis et al, ; Titcomb, O'Corry‐Crowe, Hartel, & Mazzoil, ; Urian et al, ; Wiszniewski et al, ). However, a similar pattern of social units with high spatial overlap emerging due to social preferences in other dolphin populations can be seen, for example, in bottlenose dolphins in the east coast of Scotland (Lusseau et al, ), and Guiana dolphins in the eastern coast of Brazil (Cantor et al, ).…”

Section: Discussionmentioning

confidence: 60%

“…This dynamic is not exclusive to this population and is similar to its “neighbor” Lahille's bottlenose dolphin population, which also presents social units with high spatial overlap but, differently from this population, has a strong influence of social preferences due to feeding specialization (Daura‐Jorge et al, ). Furthermore, disregarding the comparatively lower spatial overlap between units, it is very similar in terms of habitat specialization, probability of association (0.026–0.022) and temporal pattern (casual acquaintances and constant companions) to the T. truncatus population of Normano‐Breton Gulf, France (Louis et al, ).…”

Section: Discussionmentioning

confidence: 99%

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Spatiotemporal use predicts social partitioning of bottlenose dolphins with strong home range overlap

Genoves

Fruet

Tullio

et al. 2018

Ecology and Evolution

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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.

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Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Spatiotemporal use predicts social partitioning of bottlenose dolphins with strong home range overlap

Genoves

Fruet

Tullio

et al. 2018

Ecology and Evolution

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“…Cheney et al, 2013;Ingram & Rogan, 2002;Louis et al, 2015). Cheney et al, 2013;Ingram & Rogan, 2002;Louis et al, 2015).…”

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Fine‐scale population structure and connectivity of bottlenose dolphins, Tursiops truncatus, in European waters and implications for conservation

Nykänen

Louis

Dillane

et al. 2019

Aquatic Conservation

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“…, Louis et al . ). However, in some communities, a small number of individuals form strong and long‐term associations (such as alliances between males) that are thought to be shaped by ecological factors, kin selection, or mating strategies, or a combination of those (Krützen et al .…”

mentioning

confidence: 97%

“…, Louis et al . ). The coefficient of variation of the HWI ( S , the social differentiation) and the correlation coefficient of the true and estimated association matrices ( r ) were estimated using maximum likelihood procedures.…”

mentioning

confidence: 97%

Strong bonds and small home range in a resident bottlenose dolphin community in a Marine Protected Area (Brittany, France, Northeast Atlantic)

Louis

Buanic²,

Lefeuvre³

et al. 2017

Marine Mammal Science

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Social structure and abundance of coastal bottlenose dolphins,Tursiops truncatus, in the Normano-Breton Gulf, English Channel

Cited by 26 publications

References 85 publications

Spatiotemporal use predicts social partitioning of bottlenose dolphins with strong home range overlap

Spatiotemporal use predicts social partitioning of bottlenose dolphins with strong home range overlap

Fine‐scale population structure and connectivity of bottlenose dolphins, Tursiops truncatus, in European waters and implications for conservation

Strong bonds and small home range in a resident bottlenose dolphin community in a Marine Protected Area (Brittany, France, Northeast Atlantic)

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