A surge in ship traffic off South Africa’s coast has led to a significant increase in whale collisions, with scientists warning of a growing threat to these marine mammals. The number of commercial vessels sailing around the Cape of Good Hope has nearly doubled since 2023, with 89 ships making the journey between March and April this year alone. This rise in traffic is attributed to ships avoiding the Middle East due to ongoing conflicts.
The rerouting of ships has substantially increased the chances of vessels striking whales in the region, according to Professor Els Vermeulen, chief scientist at the University of Pretoria’s Whale Unit. Vermeulen and her team have been studying the distribution of whale species around the Western Cape and overlapping these models with shipping routes to identify areas of high collision risk.
Whale Collision Risk
The lack of current data makes it challenging to quantify the number of whales struck by ships, as most collisions occur deep offshore, resulting in the animals sinking to the ocean floor. This phenomenon, known as “cryptic mortality,” makes it difficult to estimate the scale of the problem. Vermeulen suggests that tweaking shipping routes and reducing vessel speeds at certain times of the year could help mitigate the issue.
Vermeulen and her team plan to conduct a systematic survey of whale populations offshore, but they require support for this work. The scientific community is coming together to address the problem, with Vermeulen noting that it is now their responsibility to gather reliable data on the offshore whale population.
Implications and Next Steps
The increase in whale collisions off South Africa’s coast has significant implications for marine conservation efforts. The ongoing conflicts in the Middle East are unlikely to be resolved soon, meaning that the surge in ship traffic around Africa will likely continue. As a result, it is essential to find effective solutions to reduce the risk of whale collisions and protect these vulnerable species.
The issue highlights the need for international cooperation to address the unintended consequences of global conflicts on marine ecosystems. As the world grapples with the challenges of protecting marine life, the surge in whale collisions off South Africa’s coast serves as a reminder of the complex and far-reaching impacts of human activities on the environment.
