Dear colleagues, On behalf of myself and my co-authors, I would like to announce the publication of a new paper: "Bottlenose dolphin *Tursiops truncatus* at São Tomé Island (São Tomé and Príncipe) — relative abundance, site fidelity and social structure" A Pereira, F Martinho, C Brito & I Carvalho African Journal of Marine Science 35(4):501-510 DOI: 10.2989/1814232X.2013.850444 Abstract Although the bottlenose dolphin *Tursiops truncatus* is one of the most common cetacean species around São Tomé Island, Gulf of Guinea, little research has focused on this species in this region. This study investigated the population of bottlenose dolphins around São Tomé Island by estimating the minimum population size, site fidelity and social structure. During a total of 226 surveys between 2002 and 2006, and in 2012, 51 sightings were recorded but only 33 had photographic data suitable for rigorous analysis. The minimum annual total population size, based on permanently marked dolphins, was 37 individuals, and the discovery curve indicated that a large part of the population remained undiscovered. The annual sighting rate for 76 highly distinctive adult animals ranged from 0.20 (seen in one year only) to 1.0 (seen every year of the study period). Resighted individuals demonstrated low association values; the dolphins seemed to form a single group with a fluid structure. The full article can be found online at: http://www.tandfonline.com/doi/abs/10.2989/1814232X.2013.850444#.UrQyeSfnQ8K Please contact me if you do not have access to the article and would like to have a copy: andreiafspereira@gmail.com Kind regards and happy holidays, Andreia Pereira - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Andreia Pereira Conservation Biology M.Sc Faculty of Sciences, University of Lisbon