Southern right whales are sounding the alarm about climate change. Once seen as a conservation success story, their numbers are slipping again. Recent research from Flinders University and Curtin University highlights significant declines in whale births linked to changing ocean conditions.
These whales, known scientifically as Eubalaena australis, play a crucial role in understanding the effects of climate change in the Southern Ocean. Over the past ten years, researchers have observed longer gaps between births, which raises concerns about the future of this vulnerable species.
For more than thirty years, scientists have collected data at the Head of the Great Australian Bight. They found that fewer calves are being born as Antarctic sea ice dwindles and ocean temperatures rise. Dr. Claire Charlton, an expert in whale research, explains that while climate change may seem far away, its effects are already visible on Australia’s coast.
“The long-term research here shows that climate impacts are influencing animals that seek refuge in our waters,” she says. “We need to work together to ensure these species have a future.”
After almost being driven to extinction by whaling in the 19th and 20th centuries, southern right whales slowly began to recover due to international protection. However, their current population, between 2,346 and 3,940, is only about 16% to 26% of what it was before whaling began. Calf figures have also diminished, dropping from 222 in 2016 to 200 in 2024.
Moreover, these whales face more than just climate change. Human activities, like ship strikes and noise pollution, also threaten their survival. The challenges are growing, with less krill—one of their primary food sources—available due to environmental changes.
In response to these pressures, some southern right whales are shifting their feeding habits, moving from Antarctic waters to sub-Antarctic regions and adapting their diets. This flexibility shows their resilience but also highlights the need for urgent conservation efforts.
According to the recent study published in Scientific Reports, the current reproductive decline serves as a critical warning. Dr. Charlton emphasizes that it highlights the urgency of conservation strategies in the Southern Ocean. “Ongoing research is vital,” she says. “It informs population assessments and helps us understand how to best protect these incredible creatures.”
As we face unprecedented climate changes, it’s essential to recognize the importance of protecting species like the southern right whale. Their struggle reflects broader environmental issues and signals the need for action to safeguard our oceans and the life within them.
For further reading on the study, you can explore the article ‘Climate-Driven Reproductive Decline in Southern Right Whales’ [here](https://doi.org/10.1038/s41598-026-36897-1).
