Posts

seaquake strands 150 melon-headed whales in Japan

Image
April 10, 2015 : Extreme changes in diving pressure generated during a seaquake caused barotrauma in the cranial air sinuses of a pod of melon-headed dolphins on 22 March (see below). Because they use the air in their sinuses and air sacs serve as acoustic mirrors bouncing, focusing, and channeling returning echo location and navigation clicks in a fashion to make their biosonar work, a pressure-related tear in the membranes of these air spaces knocks out their navigation. They swim blindly downstream in the path of least drag arriving at a 6-mile stretch of Hokota Beach about 60 miles northeast of Tokyo Japan on Friday morning. Words of an AFP journalist at the scene revealed that the pod has no sense of direction. He wrote that despite efforts to push the dolphins to deep water, they were being washed back onto the beach by the incoming surface current ( link ). That they could not swim to freedom against the incoming flow indicates that they have no acoustic sense of direction...

Seaquake Causes Pilot Whale Beaching in Western Australia South of Perth

Image
2015-Mar-23:  At 22 minutes after midnight of March 6th, a magnitude 6 shallow focused earthquake occurred along the mid ocean ridge about 2,000 miles from the stranding site in Bunbury Harbour south of Perth Australia. The is the same spot where on 27 June 1865, the Coya, a 516-ton iron barque from London, experienced two very severe earthquake shocks accompanied by loud rumbling noises and a highly disturbed ocean surface ( link ). No doubt the epicenters of all 3 quakes were close and their intensity similar. The question for my readers is do you believe an earthquake that generates severe shocks in the water, and highly disturbed surface, is capable of causing sinus injury in an entire pod of whales? The injured pod would make it back to the surface. However, with their sinuses ruptured, they would not be able to navigate. With their bisn disabled, they would gather in a tight group and be carried downstream by the surface currents. Sharks would soon move in behind them. T...