NMML Bering Sea Cetacean Survey 1999 ...

• Main Author: Waite, Janice
• Format: Dataset
• Language: English
• Published: OBIS-SEAMAP 2021
• Subjects: Occurrence,survey,trawl,walleye pollock,cetacean,acoustic,Vessels,Sightings; Observation; Occurrence; Bering Sea
• Online Access: https://dx.doi.org/10.15468/fhv95g; https://www.gbif.org/dataset/0a408865-d68b-4b5c-b5ab-11313fd637f2

Original provider: National Marine Mammal Laboratory Dataset credits: National Marine Mammal Laboratory Abstract: Visual line-transect surveys for cetaceans were conducted in the central-eastern Bering Sea (CEBS) from 5 July to 5 August 1999, in association with a pollock stock assessment survey aboard the NOAA ship Miller Freeman. Observers scanned for cetaceans with 25x (Big Eye) binoculars form the flying bridge (platform height = 12 m) at survey speeds of 18.5-22 km h-1 (10-12 knots). Transect survey effort was 1,761 km, in a study area 196,885 km2. An additional 609 km of trackline was surveyed, while in transit to or from Pollock survey way points. Fin whales ( Balaeoptera physalus ) were the most common large whale, and Dall's porpoises ( Phocoenoides dalli ) were the most common small cetacean. In the CEBS 1999, uncorrected cetacean abundance estimates were: 3,368 (CV = 0.29) fin whales, 810 (CV = 0.36) minke whales ( B. acutorostrata ), 14,312 (CV = 0.26) Dall's porpoise, and 693 (CV = 0.53) harbor ...