[MARMAM] New paper: Sex-specific home ranges of bottlenose dolphins

Kate Sprogis K.Sprogis at murdoch.edu.au
Sun Aug 23 01:41:45 PDT 2015

Dear MARMAM Colleagues,

We are pleased to announce the following publication in Marine Mammal Science:

Kate R. Sprogis, Holly C. Raudino (nee Smith), Robert Rankin, Colin D. MacLeod and Lars Bejder. Home range size of adult Indo-Pacific bottlenose dolphins (Tursiops aduncus) in a coastal and estuarine system is habitat and sex-specific. Marine Mammal Science. DOI: 10.1111/mms.12260

This study examined sex-specific differences in home range size of adult Indo-Pacific bottlenose dolphins off Bunbury, Western Australia. We applied a new kernel density estimation approach that accounted for physical barriers to movements. A Bayesian mixture model was developed to estimate a sex effect in home range size with latent group partitioning constrained by association data. A post hoc analysis investigated group partitioning relating to the proportion of time spent in open vs. sheltered waters. From 2007-2013, photographic-identification data were collected along boat-based systematic transect lines (n= 586). Analyses focused on adult dolphins of known sex (sighted ≥ 30; n= 22 males and 34 females). The 95% utilization distributions of males varied between 27-187 km2 (x̄ ± SD; 94.8 ± 48.15) and for females between 20-133 km2 (65.6 ± 30.9). The mixture model indicated a 99% probability that males had larger home ranges than females. Dolphins mostly sighted in open waters had larger home ranges than those in sheltered waters. Home ranges of dolphins sighted in sheltered waters overlapped with areas of highest human activity. We suggest that sex differences in home ranges are driven by male mating strategies, and home range size differences between habitats may be influenced by prey availability and predation risk.

The article can be downloaded from: http://onlinelibrary.wiley.com/doi/10.1111/mms.12260/abstract

Alternatively, if you are unable to download the article please email me for a pdf at k.sprogis at murdoch.edu.au<mailto:k.sprogis at murdoch.edu.au>.

Kind regards,
Kate Sprogis PhD
Cetacean Research Unit | School of Veterinary and Life Sciences,
Murdoch University, 90 South St, Murdoch WA 6150, Australia
k.sprogis at murdoch.edu.au<mailto:k.sprogis at murdoch.edu.au> | MUCRU Kate Sprogis<http://mucru.org/group-members/kate-sprogis> | Kate Sprogis Photography<http://katesprogisphotography.com/>
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