The effect of two 12 kHz multibeam mapping surveys on the foraging behavior of Cuvier's beaked whales off of southern California
| Autor: | Nancy DiMarzio, Larry A. Mayer, Ernst Linder, David Moretti, Jennifer L. Miksis-Olds, Hilary Kates Varghese, Kim Lowell |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Acoustics and Ultrasonics biology Foraging Whales Human echolocation Acoustics 02 engineering and technology 021001 nanoscience & nanotechnology biology.organism_classification 010603 evolutionary biology 01 natural sciences California Fishery Beaked whale Sound Geography Echo sounding Arts and Humanities (miscellaneous) Echolocation Animals 14. Life underwater Marine mammals and sonar 0210 nano-technology |
| Zdroj: | The Journal of the Acoustical Society of America. 147:3849-3858 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/10.0001385 |
| Popis: | The impact of multibeam echosounder (MBES) operations on marine mammals has been less studied compared to military sonars. To contribute to the growing body of MBES knowledge, echolocation clicks of foraging Cuvier's beaked whales were detected on the Southern California Antisubmarine Warfare Range (SOAR) hydrophones during two MBES surveys and assembled into foraging events called group vocal periods (GVPs). Four GVP characteristics were analyzed Before, During, and After 12 kHz MBES surveys at the SOAR in 2017 and 2019 to assess differences in foraging behavior with respect to the mapping activity. The number of GVP per hour increased During and After MBES surveys compared with Before. There were no other differences between non-MBES and MBES periods for the three other characteristics: the number of clicks per GVP, GVP duration, and click rate. These results indicate that there was not a consistent change in foraging behavior during the MBES surveys that would suggest a clear response. The animals did not leave the range nor stop foraging during MBES activity. These results are in stark contrast to those of analogous studies assessing the effect of Naval mid-frequency active sonar on beaked whale foraging, where beaked whales stopped echolocating and left the area. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|