Sharks have disappeared from more than 1,000 coral reefs! The reason - overfishing, so research has shown.
Nick Graham, Professor of Marine Ecology at the University of Lancaster and one of the authors of the publication, studied reefs around the Maldives, Papua New Guinea and the Great Barrier Reef.
It turns out that the absence of sharks seriously threatens the survival of reefs. Sharks prevent the dominance of any species of fish and at the same time allow small herbivorous fish to grow and eat algae that can drown young corals.
Researchers have studied 1,800 tropical coral reefs and found that sharks are absent in over 70%, including unfortunately in marine reserves. These places are often surrounded by areas where intensive fishing is carried out, and at the same time are too small to protect sharks that travel far beyond the boundaries of the reserve during the hunt.
At the same time, it is worth noting that within the same research it turned out that the reefs in remote marine reserves still had healthy shark populations. The scholar said that the farther from human influences, the easier it was to meet sharks. It follows that areas for the protection of sharks are very important.
Protect sharks, and above all coral reefs!