Australia, the great brown land down under, is home to many iconic and often strange-looking creatures, both above and below the water. But few are as unique and visually spectacular as the leafy seadragon!
This is the findings of a new study in Global Change Biology by the University of British Columbia. The reason for this future decline in size stems from the fact that fish are cold-blooded animals, and are thus unable to regulate their body temperatures.
“When their waters get warmer, their metabolism accelerates and they need more oxygen to sustain their body functions,” said co-author William Cheung, associate professor at the Institute for the Ocean and Fisheries and director of science for the Nippon Foundation-UBC Nereus Program.
This first standard is called "RTC Rebreather Diver Level 1," and it delineates a stage in a diver’s development where he or she is trained to dive with a rebreather to a maximum depth of 30m (100ft) with no planned stage decompression stops, and without supervision by an instructor or divemaster.
This standard will make it easier to compare certifications from different agencies, and is intended to be followed by others later.1
