| using models of social transmission to examine the spread of longline depredation behavior among sperm whales in the gulf of alaska. | fishing, farming and ranching provide opportunities for predators to prey on resources concentrated by humans, a behavior termed depredation. in the gulf of alaska, observations of sperm whales depredating on fish caught on demersal longline gear dates back to the 1970s, with reported incidents increasing in the mid-1990s. sperm whale depredation provides an opportunity to study the spread of a novel foraging behavior within a population. data were collected during national marine fisheries serv ... | 2014 | 25272019 |
| three-dimensional localization of sperm whales using a single hydrophone. | a three-dimensional localization method for tracking sperm whales with as few as one sensor is demonstrated. based on ray-trace acoustic propagation modeling, the technique exploits multipath arrival information from recorded sperm whale clicks and can account for waveguide propagation physics like interaction with range-dependent bathymetry and ray refraction. it also does not require ray identification (i.e., direct, surface reflected) while utilizing individual ray arrival information, simpli ... | 2006 | 17069330 |
| observations of potential acoustic cues that attract sperm whales to longline fishing in the gulf of alaska. | sperm whales (physeter macrocephalus) have learned to remove fish from demersal longline gear deployments off the eastern gulf of alaska, and are often observed to arrive at a site after a haul begins, suggesting a response to potential acoustic cues like fishing-gear strum, hydraulic winch tones, and propeller cavitation. passive acoustic recorders attached to anchorlines have permitted continuous monitoring of the ambient noise environment before and during fishing hauls. timing and tracking a ... | 2007 | 17672672 |