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Metadata: 2022-2023, Sea Mammal Research Unit and University of Bangor, Morlais, Marine Characterisation Research Project, Seabird and marine mammal observations (WP1a)
Abstract:
This series is comprised of data collected from the deployment of 15 soundtrap recorders used to collect baseline data on the occurrence and relative abundance of vocalising cetacean species in and around the Morlais Development Zone (MDZ). Each soundtrap was configured to record continuous data at 48kHz and to run a high frequency click detector on data sampled at 384kHz. Species of interest are common dolphin (Delphinus delphis), bottlenose dolphin (Tursiops truncatus), Risso’s dolphin (Grampus griseus), harbour porpoise (Phocoena phocoena), and minke whales (Balaenoptera acutorostrata). Between them, these species vocalise over a wide frequency range, from 70Hz pulses of minke whales, to 130kHz clicks of harbour porpoise. To capture such a wide range of sounds, SoundTraps (oceaninstuments.co.nz) were used for data collection, which acquire data at a sample rate of 384kHz and combine automatic high frequency click detection to capture high frequency odontocete echolocation clicks, and continuous recording of the data resampled at 48kHz which can be used to detect dolphin whistles and minke whale pulsed calls. Access to the MCRP data is strictly subject to the MCRP Data Terms of Use. Please ensure that you read and understand the Terms of Use prior to using any of the data as you will be bound to comply with the same. The MCRP Terms of Use are the prevailing Terms of Use and supersede that of Marine Data Exchange Terms of Use in relation to MCRP data.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 19145 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2022-2023, Sea Mammal Research Unit and University of Bangor, Morlais, Marine Characterisation Research Project, Seabird and marine mammal observations (WP1a) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Seabird and marine mammal observations (WP1a) |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 53e35e26-b2b3-41ad-bc4c-5c3f7bab7eb0 |
| Resource Identifier | This is the code assigned by the data owner. | TCE-3921 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2022-11-29 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2023-08-15 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This series is comprised of data collected from the deployment of 15 soundtrap recorders used to collect baseline data on the occurrence and relative abundance of vocalising cetacean species in and around the Morlais Development Zone (MDZ). Each soundtrap was configured to record continuous data at 48kHz and to run a high frequency click detector on data sampled at 384kHz. Species of interest are common dolphin (Delphinus delphis), bottlenose dolphin (Tursiops truncatus), Risso’s dolphin (Grampus griseus), harbour porpoise (Phocoena phocoena), and minke whales (Balaenoptera acutorostrata). Between them, these species vocalise over a wide frequency range, from 70Hz pulses of minke whales, to 130kHz clicks of harbour porpoise. To capture such a wide range of sounds, SoundTraps (oceaninstuments.co.nz) were used for data collection, which acquire data at a sample rate of 384kHz and combine automatic high frequency click detection to capture high frequency odontocete echolocation clicks, and continuous recording of the data resampled at 48kHz which can be used to detect dolphin whistles and minke whale pulsed calls. Access to the MCRP data is strictly subject to the MCRP Data Terms of Use. Please ensure that you read and understand the Terms of Use prior to using any of the data as you will be bound to comply with the same. The MCRP Terms of Use are the prevailing Terms of Use and supersede that of Marine Data Exchange Terms of Use in relation to MCRP data. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Species of interest at the Morlais site vocalise over a wide frequency range: from low frequency 70Hz pulses of minke whales to ultrasonic ~130kHz echolocation clicks of harbour porpoise. High frequency sampling at frequencies over 300kHz is therefore required to capture these sounds. However, continuous recording of high frequency sounds generates more data than can be easily stored during long deployments. SoundTraps from Ocean Instruments (oceaninstruments.co.nz) overcome this problem by sampling raw data at a rate of 384kHz and then running a simple transient click detector on the raw data. Timestamped waveforms of transient sounds are stored for further offline processing: for each detected transient, 249 samples prior to the detection and 249 samples following the detections are stored, generating snippets of sounds 1.3ms in duration. At the same time, the SoundTrap processor decimates (reduces the frequency of) the data 8x to 48kHz and stores these lower frequency data continuously to file. This means that high frequency echolocation clicks from dolphin and porpoise can be detected by further offline classification of the detected transients, and other sounds such as dolphin whistles, minke whale pulses, and noise can be detected and measured in the continuous 48kHz data. SoundTraps record both the detected transients and the continuous 48kHz data into proprietary compressed (.sud) files, which typically reduce the amount of stored data by x3 or x4 using the algorithms described in (Johnson et al., 2013). In this way, SoundTraps are able to operate for many months, storing data on up to four 256 or 512GByte micro SD cards. All data were collected on a 24 hour on / 24 hour off duty cycle in order to conserve battery power, to ensure that SoundTraps could record for a full four-month deployment. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bird counts |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bird behaviour | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seal behaviour | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seal abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bird taxonomy-related abundance per unit area of surface | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Cetacean abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pre-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Agreement for Lease Area | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.3063 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.7223 |
| South | The southern-most limit of the data resource in decimal degrees | 53.2763 |
| West | The western-most limit of the data resource in decimal degrees | -4.7063 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Bangor University School of Ocean Sciences | |
| Individual name | Catherine Blakey | |
| cathy.blakey@bangor.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Sea Mammal Research Unit (SMRU) | |
| Phone | +44 (0)1334 462630 | |
| smru@st-andrews.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Menter Môn | |
| enquiries@mentermon.com | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-3921/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | Once published, there will be no limitations on public access. Data must be used in accordance with the Marine Data Exchanges Terms of Use which can be found on the website. | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Once published, there will be no constraints on access and use. Data must be used in accordance with the Marine Data Exchanges Terms of Use which can be found on the website. |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2025-01-16 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-02-05 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |