Sarah Bedolfe
James Cameron visits the Abyss; new species of hammerhead shark found; Ancient Hawaiians had abundant fisheries, harsh enforcement.

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

James Cameron visits Challenger Deep, makes history. The filmmaker made the first solo descent to the ocean’s deepest point on Monday, March 26. [National Geographic News]   

Extinction imminent for world’s smallest dolphin; larger MPAs may help. The population of Maui dolphins, a subspecies of Hector’s dolphins native to New Zealand, is about 55 individuals and dropping. A study of Hector’s dolphins showed an MPA reversed a decline in their population, but since the comeback was not as strong as scientists expected, the government is considered expanding protections. [Daily Mail; BBC] 

Ancient Hawaiians strictly managed fisheries, and caught more fish. From 1400 to 1800, they caught five times the average harvest of all the world’s island nations today. Rules were strictly enforced on things like gear, species, catch limits and protected areas, but modern regulators suggest stopping short of the ancient Hawaiians’ death penalty for the worst offenders. [The New York Times]  

Discovery of new hammerhead shark species raises concern. DNA analysis revealed that what was long thought to be a single species is actually two separate species – the scalloped hammerhead and a yet-unnamed one, suggesting that population size estimates are incorrect and raising concern for the species status. [Live Science]    

Ship disappears in Japan tsunami, reappears off British Columbia. The boat was found 150 nautical miles off Canada. A slew of other tsunami debris has already started arriving on west coast shores. [Seattle Pi]   

Saguaro National Park eliminates disposable beverage bottles. One-upping the Grand Canyon’s ban on water bottles, Saguaro bans sodas as well, expecting to reduce the park’s recyclable waste by about 40%. Saguaro will install water fountains for visitors to the hot, dry climate. [Treehugger] 

Perpetual Ocean: This mesmerizing Van Gogh-like video is a visualization of the ocean’s surface currents worldwide, courtesy of NASA/Goddard Space Flight Center Scientific Visualization Studio



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