Multi-method observations suggest recolonization of the Crozet Islands by southern right whales with links to different coastal calving grounds

In the past decade, notable changes have occurred in many of southern right whale populations likely linked to global climate change. This has shifted research focus from coastal calving grounds to offshore foraging grounds in the Southern Ocean under the IWC-SORP Theme 6. Based on historical whaling records, the Crozet Islands are known as a historical foraging ground, however little is know about their contemporary presence. A first compilation of data clearly shows a recolonization of the Crozet Islands by SRWs, suggesting the area should be considered as an important mid-latitude summer foraging ground for the species, with known connections to the South African and Australian calving grounds. Further work should also consider possible connections to the SRWs observed in the southwest Indian Ocean. Based on this, it is suggested that focussed research on SRWs in the Crozet Islands should be pursued.

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Vermeulen Els, Tixier Paul, Carroll Emma L., Cerchio Salvatore, Collins Tim, Gasco Nicolas, Germishuizen Matthew, Guinet Christophe, Harcourt Rob, Houegnigan Ludwig, Kennedy Amy, Samaran Flore, Zerbini Alexandre N., Sprogis Kate (2024). Multi-method observations suggest recolonization of the Crozet Islands by southern right whales with links to different coastal calving grounds. Ref. SC/69B/SH/12. IWC. https://archimer.ifremer.fr/doc/00892/100381/

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