Sampling event

Marine mammal baseline, Johan Castberg

Latest version published by Equinor on 11 August 2023 Equinor
Publication date:
11 August 2023
Published by:
CC-BY 4.0

Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 2 records in English (5 KB) - Update frequency: as needed
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Metadata as an RTF file download in English (8 KB)


Acoustic data were recorded at the Johan Castberg field in the southern Barents Sea at three locations from October 2018 until June 2019 to assess the presence of marine mammals and characterise the underwater soundscape. The marine mammal analysis was focused on two stations (PAMEast and PAMNorth) as the third (PAMWest) stopped recording early and the data suffered from poor audio quality.

Five marine mammal species were detected during the study: fin whale, humpback whale, killer whale, sperm whale and a dolphin species whose signals were tentatively attributed to white-beaked dolphins on the basis of sighting records in the area and habitat preference of this species. These species were generally detected at similar levels at PAMEast and PAMNorth, except for dolphins, which were more common at PAMNorth. Dolphins showed a pronounced seasonal pattern of occurrence, with very few detections in winter. Killer whale occurred sporadically, their occurrence peaking in November and March, possibly coinciding with that of prey species. Along with dolphins, sperm and fin whales were the most commonly detected species, occurring throughout the study, albeit slightly less frequently in late winter than during the rest of the year. Humpback whale detections peaked in March, which may be associated with the transit of migrating animals through the area as they return to feed on spring spawning herring.

The full Johan Castberg report can be accessed here:

Data Records

The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 2 records.

1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

Event (core)

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Mogstad A A, Nilssen I (2023). Marine mammal baseline, Johan Castberg. Version 1.1. Equinor. Samplingevent dataset.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is Equinor. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: c4383526-4b48-4655-a070-26df37cb1847.  Equinor publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.




Aksel Alstad Mogstad
  • Metadata Provider
  • Originator
  • Point Of Contact
Sr Researcher
Ingunn Nilssen
  • Originator
  • Point Of Contact
Lead Researcher

Geographic Coverage

Johan Castberg field, southern Barents Sea.

Bounding Coordinates South West [72.465, 20.343], North East [72.574, 20.347]

Taxonomic Coverage


Kingdom Animalia

Temporal Coverage

Start Date / End Date 2018-10-05 / 2019-06-19

Additional Metadata

Purpose As part of Equinor's biodiversity position, we support the principle of sharing data from our impact assessments and environmental monitoring activities with the scientific community and the general public. We actively participate in a wide range of research programmes and industry partnerships to further build knowledge and develop innovative solutions to protect biodiversity.
Alternative Identifiers