Dear Colleagues,   The following article has recently been published:   Bisi TL, Dorneles PR, Lailson-Brito J, Lepoint G, Azevedo AF, Flach L, Malm O, Das K. (2013) Trophic Relationships and Habitat Preferences of Delphinids from the Southeastern Brazilian Coast Determined by Carbon and Nitrogen Stable Isotope Composition. PLoS ONE 8(12): e82205. doi:10.1371/journal.pone.0082205   Abstract: To investigate the foraging habitats of delphinids in southeastern Brazil, we analyzed stable carbon (d13C) and nitrogen(d15N) isotopes in muscle samples of the following 10 delphinid species: Sotalia guianensis, Stenella frontalis, Tursiopstruncatus, Steno bredanensis, Pseudorca crassidens, Delphinus sp., Lagenodelphis hosei, Stenella attenuata, Stenella longirostris and Grampus griseus. We also compared the d13C and d15N values among four populations of S. guianensis. Variation incarbon isotope results from coast to ocean indicated that there was a significant decrease in d13C values from estuarinedolphins to oceanic species. S. guianensis from Guanabara Bay had the highest mean d13C value, while oceanic speciesshowed significantly lower d13C values. The highest d15N values were observed for P. crassidens and T. truncatus, suggestingthat these species occupy the highest trophic position among the delphinids studied here. The oceanic species S. attenuata,G. griseus and L. hosei had the lowest d15N values. Stable isotope analysis showed that the three populations of S. guianensis in coastal bays had different d13C values, but similar d15N results. Guiana dolphins from Sepetiba and Ilha Grande bays haddifferent foraging habitat, with specimens from Ilha Grande showing more negative d13C values. This study provides furtherinformation on the feeding ecology of delphinids occurring in southeastern Brazil, with evidence of distinctive foraginghabitats and the occupation of different ecological niches by these species in the study area.   Full text is freely available at: http://dx.plos.org/10.1371/journal.pone.0082205 For further inquiries, please feel free to contact me at tbisi@yahoo.com.br Best regards, Tatiana.   ------- Dra. Tatiana Lemos Bisi Laboratório de Mamíferos Aquáticos e Bioindicadores “Profa. Izabel Gurgel” (MAQUA) Faculdade de Oceanografia Universidade do Estado do Rio de Janeiro Rua São Francisco Xavier, 524 sala 4002, bloco E, 4o andar Maracanã, Rio de Janeiro - RJ CEP 20.550-013 Tel: +55 21-2334-0065 / 2334-0795 email: tbisi@yahoo.com.br