Dear MARMAM subscribers, We are pleased to announce the publication of our paper about population genetic structure of the South American Bryde’s whale in the last issue (December, 2015) of the Revista de Biología Marina y Oceanografía: Pastene,LA, Acevedo, J, Siciliano,S, Sholl,TGC, Moura,JF, Ott. PH & Aguayo-Lobo, A (2015). Population genetic structure of the South American Bryde’s whale. *Revista de Biología Marina y Oceanografía*, 50(3): 453-464. *Abstract* A genetic analysis based on mitochondrial DNA control region sequences was conducted to investigate both species identity and populations genetic structure of South American Bryde’s whales. The genetic analysis was based on historical, biopsy and stranding samples from Chile (n= 10) and Brazil (n= 8). For comparative purposes published sequences of the Bryde’s whales from different localities of the Indian and Pacific Oceans (including Peru, n=24) were incorporated into the analysis. Results of the phylogenetic analysis identified the Bryde’s whales of South America as *Balaenoptera brydei*. No statistically significant genetic differentiation was found between Chilean and Peruvian Bryde’s whales. However, striking differences were found between western South Atlantic (Brazil) and eastern South Pacific (Peru and Chile) animals. In addition, striking genetic differences were found between all South American localities and those from the western North Pacific, Fiji and Java. These results suggest movement of *B. brydei* in the eastern South Pacific in the latitudinal range corresponding to Chile and Peru. These results also suggest no or very limited movement of whales between the South Pacific and the South Atlantic Oceans. This is consistent with the notion that *B. brydei* is not distributed further south of approximately 40ºS on both sides of South America. A full copy of the paper can be downloaded at: http://www.revbiolmar.cl/resumenes/v504/504-453.pdf Sincerely yours, Paulo H. Ott -- Dr. Paulo Henrique Ott Universidade Estadual do Rio Grande do Sul (Uergs) Unidade do Litoral Norte Rua Machado de Assis, 1456 - Bairro Sulbrasileiro Osório/RS - CEP: 95520-000 Fone (51) 3663-9455. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). www.gemars.org.br *To be a naturalist is not just an activity but an hororable state of mind* - E.O. Wilson