Research jointly conducted by The Swire Institute of Marine Science (SWIMS), Faculty of Science, The University of Hong Kong (HKU), and The Nature Conservancy (TNC) emphasises the importance of oyster reefs in mitigating some problems associated with coastal development, like storm-surge damage and biodiversity loss.
Fakarava is an atoll in the Tuamotu archipelago located about 440km northeast of Tahiti in French Polynesia. Pierre Constant takes us on a journey to the pristine lagoons of Tuamotu and describes what awaits adventurous divers in its underwater realm.
Most of these sounds were measured at more than 21 kHz, which is beyond the range of human hearing of 20 to 20,000 hertz. A particular high-pitched whistle came in at 49.8 kHz. When the seals harmonised multiple tones, the resultant sound may exceed 200 kHz, which is beyond what even cats and dogs can hear).
The discovery was the subject of a paper published online in the journal The Journal of the Acoustical Society of America.
About 13 hours later, at 4:40 pm, three submarines—Щ-205, Щ-206 and Щ-209 (Щ is short for Щука or shuka, which means pike in Russian)—received approval from the Kremlin to move towards the eastern shores of the Black Sea, while the M-33 and M-34 left for long-range patrol near the main base. It was the first day of the war in the Black Sea.
