[MARMAM] New publication on Southern Hemisphere humpback whales

Eric Angel Ramos eric.angel.ramos at gmail.com
Wed Mar 22 11:46:04 PDT 2023


Greetings MARMAM!

I am pleased to announce the publication of our research article titled
“Interchange of Southern Hemisphere humpback whales across the South
Atlantic Ocean” in Scientific Reports. The article is Open Access and can
be found here: https://www.nature.com/articles/s41598-023-31358-5

Ramos, E.A., Cheeseman, T., Marcondes, M.C.C. et al. Interchange of
Southern Hemisphere humpback whales across the South Atlantic Ocean. Sci
Rep 13, 4621 (2023). https://doi.org/10.1038/s41598-023-31358-5

Abstract
The cosmopolitan distribution of humpback whales (Megaptera novaeangliae)
is largely driven by migrations between winter low-latitude breeding
grounds and summer high-latitude feeding grounds. Southern Hemisphere
humpback whales faced intensive exploitation during the whaling eras and
recently show evidence of population recovery. Gene flow and shared song
indicate overlap between the western (A) and eastern (B1, B2) Breeding
Stocks in the South Atlantic and Indian Oceans (C1). Here, we investigated
photo-identification evidence of population interchange using images of
individuals photographed during boat-based tourism and research in Brazil
and South Africa from 1989 to 2022. Fluke images were uploaded to
Happywhale, a global digital database for marine mammal identification. Six
whales were recaptured between countries from 2002 to 2021 with resighting
intervals ranging from 0.76 to 12.92 years. Four whales originally
photographed off Abrolhos Bank, Brazil were photographed off the Western
Cape, South Africa (feeding grounds for B2). Two whales originally
photographed off the Western Cape were photographed off Brazil, one
traveling to the Eastern Cape in the Southwestern Indian Ocean (a migration
corridor for C1) before migrating westward to Brazil. These findings
photographically confirm interchange of humpback whales across the South
Atlantic and Indian Oceans and the importance of international
collaboration to understand population boundaries.

 If you have any questions please feel free to contact me, Eric Angel Ramos
(eric.angel.ramos at gmail.com) or Ted Cheeseman (ted at happywhale.com).

 Best regards,
-- 

*Eric Angel Ramos, Ph.D.*
Postdoctoral Research Associate at The University of Vermont
Scientist at FINS (Fundación Internacional para la Naturaleza y la
Sustentabilidad)

Member of the IUCN SSC Sirenian Specialist Group for Mesoamerica

www.finsconservation.org <https://finsconservation.org/>
E-mail: eric.angel.ramos at gmail.com
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