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Tuesday, June 19, 2012

Dolphin Communication Diplomacy

Tonal whistle sounds allow dolphins to stay in contact with each other, and to coordinate hunting strategies. The burst-pulsed sounds (which are more complex and varied than the whistles) are used “to avoid physical aggression in situations of high excitement, such as when they are competing for the same piece of food. Dolphins Use Diplomacy in Their Communication
Pacific Whitesided Dolphin Burst Calls - Orchive
- recording by Orcalab

Sunday, June 17, 2012

242A Calls

There were 61 northern resident discrete calls identified for tape 242A (August 5, 2004, 19:30 - 20:17). The majority of calls were; N4 (40%), N16 (20%), and N7 (15%) respectively. The A12s were identified at Cracroft Island where the majority of calls were heard.

Sunday, June 10, 2012

Endangered orcas’ habitat scheduled for seismic tests on June 11th, 2012

Even though Columbia University’s Earth Observatory sent in their application for “Incidental Harassment Authorization to take marine mammals” last January, the permit was granted at the end of April with a 30 day comment period – but no notice was sent, other than in the Federal Register. Now, with just days to prevent this, scientists and advocates are scrambling to block the seismic exploration before the orcas (along with nearly two dozen other species of whales and dolphins) are exposed to sound levels believed to have caused the mass death of thousands of dolphins in Peru.

Sunday, June 03, 2012

242B Calls

There were 80 discrete northern resident calls identified for recording 242B (August 5, 2004). The majority of calls were N4 (41%), N1 (31%), and N5 (14%). A1 and A4 pods were identified, whales were rubbing on pebbles at 20:29. Fig1'