Description
Original provider: Encana Corporation Dataset credits: Marielle Thillet, Deep Panuke Project, Encana Corporation Abstract: We present marine mammal observation statistics, high-frequency seismic source characteristics, and example denoising of marine mammal acoustical recordings using data collected during the mitigation and monitoring program for a 3-D seismic survey by Encana Corporation, Calgary, Alberta, Canada, in the northwest Atlantic during 2003. Marine mammals were observed both visually and acoustically. No marine mammal incidents or adverse reactions were observed during the survey. Acoustical observations were made by the Seamap Passive Acoustic Cetacean Monitoring System (SPACMS), consisting of two hydrophones placed 50 m apart, towed ahead of and to one side of the seismic source. Visual and acoustical detections were uncorrelated, indicating the complementary nature of the two observational techniques. Visual detections were more common per hour of effort than acoustical detections. Acoustical detection rates showed no significant day–night difference. Marine mammals appeared to have avoided very close ranges (100 m) from the seismic array during seismic acquisition, but the overall number of marine mammals in the observable radius (1–2 km) did not change significantly when the seismic source was “on” compared to “off.” Marine mammals were observed in larger groups and appeared to have become less vocal when the seismic source was active. It should be noted however, that the results from this data gathering effort may be affected by potential sources of bias (such as the combination of data from toothed and baleen whales). Signal processing of seismic source signatures indicated some high-frequency energy content consistent with expectations from earlier work. This analysis confirmed that most of the seismic energy was concentrated at lower frequencies (500 Hz). No low-frequency comparisons with near-field data could be made due to the geometry of the SPACMS recording hydrophones and seismic source, which resulted in the Lloyd’s mirror effect obliterating low-frequency components in the SPACMS records. A wavelet-based denoising method was applied to improve the visibility of marine mammal vocalizations on a spectrogram display. Supplemental information: Acoustic data collected in this survey are registered on OBIS-SEAMAP separately as the Deep Panuke whale acoustic 2003 dataset.
Data Records
The data in this occurrence 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 61 records.
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.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Thillet, M. 2011. Deep Panuke whale sightings 2003. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/650) on yyyy-mm-dd.
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is OBIS-SEAMAP. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: e19879fb-f61b-4015-bb09-4dc28e80351d. OBIS-SEAMAP publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Ocean Biodiversity Information System.
Keywords
Occurrence; Observation; Occurrence
External data
The resource data is also available in other formats
| OBIS-SEAMAP Dataset Page | http://seamap.env.duke.edu/dataset/650 UTF-8 Interactive map |
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| FGDC Metadata | http://seamap.env.duke.edu/dataset/650/xml UTF-8 XML |
Contacts
- Owner ●
- Originator ●
- Point Of Contact
- Metadata Provider ●
- Distributor
Geographic Coverage
Oceans
| Bounding Coordinates | South West [42.32, -57.748], North East [44.545, -57.098] |
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Taxonomic Coverage
Scientific names are based on the Integrated Taxonomic Information System (ITIS).
| Order | Cetacea (cetaceans) |
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| Family | Delphinidae (dolphins) |
| Species | Tursiops truncatus (Common Bottlenose Dolphin), Balaenoptera physalus (Fin Whale), Phocoena phocoena (Harbor Porpoise), Megaptera novaeangliae (Humpback Whale), Globicephala melas (Long-finned Pilot Whale), Balaenoptera acutorostrata (Minke Whale), Hyperoodon ampullatus (Northern bottlenose whale), Physeter macrocephalus (Sperm Whale), Lagenorhynchus acutus (Atlantic White-sided Dolphin) |
Temporal Coverage
| Start Date / End Date | 2003-04-30 / 2003-06-25 |
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Project Data
No Description available
| Title | Deep Panuke whale sightings 2003 |
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| Funding | NA |
The personnel involved in the project:
- Owner
Sampling Methods
NA
| Study Extent | NA |
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Method step description:
- NA
Collection Data
| Collection Name | zd_650 |
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| Collection Identifier | zd_650 |
| Parent Collection Identifier | OBIS-SEAMAP |
Additional Metadata
marine, harvested by iOBIS
| Purpose | Not available |
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| Alternative Identifiers | http://ipt.env.duke.edu/resource?r=zd_650 |