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Rerouted Shipping Lanes Threaten Whale Safety off South Africa’s Coast

Surge in Maritime Traffic Raises Collision Risks for Whales

Shipping routes circumventing the Middle East have dramatically increased maritime traffic off South Africa’s southwestern coast, escalating the danger of ship-whale collisions in the region. This shift stems from geopolitical tensions and ongoing conflicts in the Middle East, forcing vessels to detour around Africa’s Cape of Good Hope.

Ullstein Bild via Getty Images A humpback whale is seen breaching in Cape Town's Atlantic Ocean
Scientists fear that more ships are sailing through areas with lots of whales

Middle East Conflict Fuels Shipping Route Changes

Since 2023, when Houthi rebels hijacked a British-owned vessel near Yemen, commercial shipping has rerouted to avoid the volatile Middle Eastern waters. The intensified conflict involving the US, Israel, and Iran has further amplified this trend, redirecting a growing number of ships transporting goods between Asia and Europe around the African continent.

According to the International Monetary Fund’s PortWatch report, the number of commercial vessels navigating around the Cape of Good Hope nearly doubled from 44 between March and April 2023 to 89 during the same period in 2024. This significant surge in maritime traffic places immense pressure on local marine ecosystems.

Scientific Insights Highlight Collision Risks for Local Whale Populations

Professor Els Vermeulen, chief scientist at the University of Pretoria’s Whale Unit, recently revealed alarming findings at the International Whaling Commission. Her team employed advanced distribution models of various whale species native to the Western Cape, overlaying these with current shipping routes to identify collision hotspots.

“We analyzed where whale habitats intersect with intensified shipping lanes to assess collision risks,” Vermeulen explained. Despite these efforts, she emphasized the challenge in quantifying actual whale strikes due to limited and outdated data.

Urgent Need for Data and Protective Measures

The growing intersection of intense shipping traffic and critical whale habitats demands immediate attention. Enhanced monitoring, data collection, and implementation of maritime safety measures are crucial to safeguard these marine giants from potentially fatal ship strikes.

Getty Images/BBC A woman looking at her mobile phone and the graphic BBC News Africa
Getty Images/BBC A woman looking at her mobile phone and the graphic BBC News Africa
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