The Weekly Dive Vol. 58

Dive into the latest edition of The Weekly Dive, where we bring you the big ocean news! 

Oceana study reveals one-third of all seafood nationwide is mislabeled. DNA testing was used to identify fish served in restaurants and sold in stores nationwide. [Oceana]

Bluefin tuna caught near California still contain trace levels of Fukushima radioactivity. Scientists say the levels found in the tuna are still well below safety guidelines for public health but shows the longevity of the impact of radioactive pollution. Researchers plan to use it as a way to track the tuna. [The Huffington Post] 

The waters of Raja Ampat have been declared a sanctuary for sharks and manta rays. This is the first time such comprehensive protection has been provided for these depleted species in the Coral Triangle, and will give their populations a much-needed chance to recover. [IUCN]  

Island nations want UN to recognize climate change as international security threat. Low-lying island nations that are threatened by rising sea levels, including the Marshall Islands, have appealed to the UN to act on climate change, while other, mostly developed nations have argued against doing so. [The Huffington Post]  

Anti-whaling activists accuse Japanese whaling ship of intentionally ramming Sea Shepherd vessels. Japanese vessels claim the protesters took the offensive in an incident in which a whaling vessel collided with a Sea Shepherd boat and the whalers’ refueling vessel. The Sea Shepherd vessel sustained the most damage but nobody was injured. [The Huffington Post]

Study finds dolphins mimic calls of social group. It has been established that dolphins develop an individual identity whistle, but now scientists also have found that dolphins will mimic the signature whistles of their close companions (with slight changes to avoid confusion) to communicate and track one another. [BBC]

Alaska legislators approve looser restrictions on cruise ship dumping. Overriding a voter initiative that would have required cruise ship discharge to meet water quality standards at the point of discharge, the new law lets them meet the standard at the edge of a “mixing zone,” where treated wastewater mixes with the body of water. [Anchorage Daily News]

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