Dataset

Mingan Island Cetacean Study 84-07

OBIS-SEAMAP Open in mapper Explore occurrences

Original provider: Richard Sears, Mingan Island Cetacean Study Dataset credits: Richard Sears, Mingan Island Cetacean Study Abstract: The sightings contained in this dataset were obtained during surveys designed to photo-identify blue whales in the Sea of Cortez during their peak abundance in February and March. The surveys were conducted between 1984 and 2007 from 25' fiberglass boats in sea state less than 3-4 and designed to maximize the number of blue whale IDs. Although focusing primarily on the areas where blue whales are most commonly sighted, they also covered most of the area accessible by boat during a day trip at least once per field season. Any marine mammal sighting was recorded using cross-bearings from 1984 to 1991 and using GPS from 1992 on. Unusual bird and fish sightings were also recorded.

Citation: Delarue, J. 2014. Mingan Island Cetacean Study 84-07. Version 1.4.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/1c988d78.

Published: October 07, 2025 at 22:43

URL: http://ipt.env.duke.edu/resource?r=zd_460

4,899
occurrence records
31
taxa
27
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 4,899
100.0%
maximumDepthInMeters 4,899
100.0%
minimumDepthInMeters 4,899
100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 4,899
100.0%
ON_LAND 80
1.6%

Measurement types

DNA derived data