[MARMAM] New publication: The first assessment of social organisation of the Indian Ocean humpback dolphin (Sousa plumbea) along the south coast of South Africa (Thibaut Bouveroux)

Bouveroux Thibaut tbouveroux at gmail.com
Tue Sep 17 12:18:05 PDT 2019

Dear colleagues,

We are pleased to announce the publication of the following article:

Thibaut Bouveroux, Stephen P. Kirkman, Danielle Conry, O. Alejandra Vargas-Fonseca, Pierre A. Pistorius (2019) The first assessment of social organisation of the Indian Ocean humpback dolphin (Sousa plumbea) along the south coast of South Africa.
Canadian Journal of Zoology <https://www.nrcresearchpress.com/loi/cjz> pp. 855-865 | https://doi.org/10.1139/cjz-2018-0244 <https://doi.org/10.1139/cjz-2018-0244>

The Indian Ocean humpback dolphin (Sousa plumbea (G. Cuvier, 1829)) is the most endangered marine mammal species in South Africa, and the overall decline of its abundance and group size may affect the social organisation of the species, potentially accentuating its vulnerability. Understanding the social organisation is therefore particularly relevant to conservation efforts. From photo-identification surveys along the south coast of South Africa from March 2014 to June 2015, we quantified association patterns and investigated the social organisation of Indian Ocean humpback dolphins using the half-weight index, social cluster, and network analyses. During the 101 surveys conducted and 553 h of survey effort, 98 sightings of dolphins were recorded and 65 individuals identified. Using individuals seen at least three times, this study reveals that the social network is well differentiated, as strong social divisions exist between individuals that seem to be split into four distinctive social clusters. Network strength was low; approximately half of the associations were low to moderate, whereas some individuals were strongly associated, especially between four pairs of individuals. Although this study is based on a limited number of individuals, our study nevertheless suggests that the atypical strong social bonds recorded here could result from behavioural responses following the decline in group size and abundance.

For more information, you can access to this paper using the following link:
https://www.nrcresearchpress.com/doi/full/10.1139/cjz-2018-0244?fbclid=IwAR0wDnaZuWoI0v37NdvHn5d0DwBgkGaa3HWH1RZj8kzewQPvN4iJfGOX_RU#.XYEtAZNKhE5 <https://www.nrcresearchpress.com/doi/full/10.1139/cjz-2018-0244?fbclid=IwAR0wDnaZuWoI0v37NdvHn5d0DwBgkGaa3HWH1RZj8kzewQPvN4iJfGOX_RU#.XYEtAZNKhE5>

For a PDF copy, you can also send an email at: tbouveroux at gmail.com <mailto:tbouveroux at gmail.com>

Enjoy the read!

Best regards,

Thibaut Bouveroux, PhD
Postdoctoral Fellow
University of South Alabama
Dauphin Island Sea Lab
101 Bienville Blvd
Dauphin Island, AL 36528
+1 (251) 895 3090
tbouveroux at disl.org <mailto:tbouveroux at disl.org>

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