By now, we’ve all seen the iconic (and somewhat depressing) saw-tooth graph showing the increase in atmospheric carbon dioxide. Unfortunately, that graph continues to grow and as CO2 levels approach a “symbolic milestone” Scripps Institution of Oceanography is now providing daily updates of atmospheric CO2 measured at Hawaii’s Mauna Loa. Scripps researchers believe we will surpass 400 parts per million (ppm) as early as May 2013 and the rate won’t slow down. To put that number in perspective, CO2 levels “never exceeded 300 ppm” for the past 800,000 years.
A federal report released on Monday ranks California’s drift gillnet fishery as one of the deadliest fisheries for marine mammals–particularly for endangered sperm whales–in the nation. This fishery catches and discards an average of more than 100 protected whales, dolphins, seals and sea lions every year, along with thousands of sharks an unwanted fish. This gillnet fishery, along with the Hawaii tuna longline fishery may be classified as a “Category 1” fishery, meaning it causes “frequent” injury or death to marine mammals.
How to sea turtle hatchlings crawl through all that sand to make it to the ocean? A research team analyzed the movement of hatchlings in the wild and created a robot to further study the movement. The following video explains it all and it’s pretty impressive.
Copyright © 2013 by Marine Science Today, a publication of Marine Science Today LLC.