Scientists Have Figured Out What's Killing The World's Biggest Fish

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Scientists Have Figured Out What's Killing The World's Biggest Fish
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Over 80 percent of international trade is carried by sea. Much of what we use and consume everyday either has been or will be transported on huge vessels which plough the global ocean.

We set out to uncover the hidden deaths of whale sharks by bringing together an international team of over 60 scientists from 18 countries.satellite tracked almost 350 whale sharks by fitting them with electronic tags, mapping their positions across all major oceans in unprecedented detail. This revealed the most densely occupied regions, which were often in coastal areas where the species is known to congregate.

These regions are home to some of the world's busiest ports and sea passages, and because our estimated levels of risk correlated with known fatal collisions here, they appear to be some of the most dangerous places in the world for whale sharks to inhabit. This gave the sharks very little time to respond to an oncoming ship, and these close-range encounters may be happening more often than we have the capacity to monitor, potentially ending in fatal strikes.

As a first step to address this crisis, the International Maritime Organization could develop a global reporting scheme that consolidates records of ship-wildlife collisions for whale sharks and other threatened species.

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