Dataset

Green Balkans Cetacean monitoring surveys in the Bulgarian Black Sea waters

EurOBIS MeasurementOrFact Open in mapper Explore occurrences

The Green Balkans dataset contains effort-based occurrence records collected during a cetacean monitoring programme in the Bulgarian Black Sea waters, since 2016. The project is led by the Green Balkans NGO and aims to ensure regular monitoring of cetaceans in Bulgarian territorial and shelf waters in the Black Sea. Platforms are motor sailing yachts and at one occasion a fishing vessel. On-board trained marine mammal observers collected data on: survey effort including meteorological conditions and cetacean sightings. Data is provided in the recent OBIS-ENV-DATA format and comprises 2643 georeferenced positions associated with 1663 occurrences of 3 marine taxa. On several occasions, data was recorded only to level of Family or Superfamily. For each recorded sighting, perpendicular distance is recorded.

Citation: Popov, D., Meshkova, G. (2024). Green Balkans Cetacean monitoring surveys in the Bulgarian Black Sea waters. Marine Data Archive.

Published: September 17, 2025 at 09:10

URL: https://ipt.vliz.be/eurobis/resource?r=gb_cetaceans_bg_blacksea

Dimitar Popov
Federation of Nature Conservation NGO's Green Balkans

2,643
occurrence records
8,620
measurements and facts
5
taxa
3
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 1
0.0%

Quality flags

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

Flag Dropped Records
DEPTH_EXCEEDS_BATH 503
19.0%

Measurement types

DNA derived data