Variation in dive behavior of Cuvier’s beaked whales with seafloor depth, time-of-day, and lunar illumination
| Autor: | Jay Barlow, Erin A. Falcone, Gregory S. Schorr, David Moretti |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Ecology biology Satellite telemetry Foraging Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Seafloor spreading Ziphius cavirostris Oceanography Time of day 0103 physical sciences Variation (astronomy) 010301 acoustics Ecology Evolution Behavior and Systematics Geology |
| Zdroj: | Marine Ecology Progress Series. 644:199-214 |
| ISSN: | 1616-1599 0171-8630 |
| DOI: | 10.3354/meps13350 |
| Popis: | Depth distributions were analyzed from a study of 19 Cuvier’s beaked whales Ziphius cavirostris that were tagged with satellite transmitting instruments off southern California, USA. Over 113000 depth measurements were made over the equivalent of ~200 sampling days. The mean foraging depth was 1182 m (SD = 305 m), and the mean of the maximum depth of all foraging dives was 1427 m (SD = 298 m). Mean foraging depths increased with seafloor depths up to a maximum of ~1300 m at a seafloor depth of 1900 m, but decreased slightly to a mean of ~1200 m at seafloor depths of 2000-4000 m. Near-bottom habitat appears to be important for foraging; whales spent ~30% of their foraging time within 200 m of the bottom at seafloor depths of 1000-2000 m. However, little foraging time was spent near the bottom at seafloor depths greater than 2000 m. The percentage of time spent at near-surface depths ( |
| Databáze: | OpenAIRE |
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