Data

Mapping critical Australian sea lion habitat with animal-borne instruments (NESP MaC 2.6)

Australian Ocean Data Network

Goldsworthy, Simon ; Angelakis, Nathan ; Kirkwood, Roger

Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]

ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25959/MBR6-F262&rft.title=Mapping critical Australian sea lion habitat with animal-borne instruments (NESP MaC 2.6)&rft.identifier=10.25959/MBR6-F262&rft.description=This aim of this project is to identify and map critical habitats for Australian sea lions (Neophoca cinerea) to assess the ecological value of different habitats for sea lions and identify risks to their populations. Through this project we collected animal-borne video, GPS, time-depth and accelerometer/magnetometer data from eight adult female Australian sea lions from Olive Island (n=4) on the western Eyre Peninsula and Seal Bay (n=4) on Kangaroo Island in South Australia. Sea lions were instrumented with animal-borne cameras with integrated accelerometers/magnetometers (CATS Cam, 135 x 96 x 40 mm, 400 g) and satellite-linked GPS loggers with integrated time-depth recorders (SPLASH-10, Wildlife Computers, 100 x 65 x 32 mm, 200 g). Sea lions were sedated and anaesthetised and bio-logging instruments were glued to the pelage on the dorsal midline. Bio-logging instruments were recovered after a single foraging trip (~1-6 days). Populations of the endangered Australian sea lion have declined by >60% over the last 40 years. Australian sea lion populations show a marked uneven distribution in abundance across their range, which suggests that localised risk profiles from threats vary at small spatial scales. Fine scale differences in habitat-use are thought to underpin these differences. However, knowledge of the habitats that are critical to Australian sea lions is poor and their vulnerability to human impacts and threats at the fine-scale is not well understood. The data collected in this project provides fundamental information on critical benthic habitats for Australian sea lions, the differences in foraging behaviour of individual sea lions and their prey preferences. The information collected under this project improves our understanding of threats to sea lion populations and will support future conservation actions to recover the species.Maintenance and Update Frequency: notPlannedStatement: Eight adult female Australian sea lions from Olive Island (n=4) and Seal Bay (n=4) in South Australia were instrumented with animal-borne cameras with integrated accelerometers/magnetometers (CATS Cam, 135 x 96 x 40 mm, 400 g) and satellite-linked GPS loggers with integrated time-depth recorders ((SPLASH-10, Wildlife Computers, 100 x 65 x 32 mm, 200 g). Sea lions were sedated and anaesthetised and bio-logging instruments were glued to the pelage on the dorsal midline. Bio-logging instruments were recovered after a single foraging trip (~1-6 days). High-definition video (anterior perspective) was collected while animals were at sea, at depths greater than 5 meters, during daylight hours (between 0800-1700 local time). Batteries in the camera allowed ~13 hours of filming, this regime hence enabled filming coverage of 2-3 days of time at sea. Satellite-linked GPS loggers collected Fastloc® locations when animals surfaced, by capturing a sub-second snapshot of signals from orbiting satellite constellations at two-minute intervals (the minimum rate programmable). When dive durations exceeded two minutes, locations were sought when the device next surfaced. Locations obtained from four or fewer satellites were discarded. Time-depth recorders (TDRs) measured depth every second. Tria-axial accelerometers measured body movement (G-force), for surge (anterior-posterior), sway (lateral) and heave (dorsal-ventral) axes at 20 Hz. Tri-axial magnetometers measured the earth’s magnetic field intensity in microteslas (µT) for roll (longitudinal, north), pitch (transverse, east) and yaw (vertical, down) axes at 1 Hz. ---DATA STRUCTURE--- Data is organised into a folder for each sea lion, containing the following sub-folders: - CATS Cam Files: Direct data export from CATS camera. The CSV file contains all the dive and environmental attributes recorded by the CATS camera, e.g. accelerometer (units: m/s²), magnetometer (units: μT), depth (units: m), light (raw units: for triggering camera), temperature (°C). - CATS Video Files: Contains all video files collected by the CATS camera. Each filename contains datetime (local) in the YYYYMMDD-HHMMSS - Wildlife Computers File: Contains the raw file from the Wildlife Computers SPLASH-10 tag (users will need the Mk10 Host software, downloaded from the Wildlife Computers website, to open this file). Exported GPS data in a non-proprietary format is contained in the next folder (GPS). - GPS: contains the GPS information collected by the Wildlife Computers SPLASH-10 tag (note these are the files generated when the raw Wildlife Computers file (.wch) is processed to generate the FastLoc GPS locations (KMZ file) on the Wildlife Computers Data Portal site). Users will most likely want the Locations.csv or FastLocGPS.kmz file, which contains lat/lon, datetime, and a quality score for the captured satellite information. - TDR: contains the depth file collected by the Wildlife Computers SPLASH-10 tag (this is the file generated when the raw Wildlife Computers file (.wch) is opened in the Mk10 Host software) ---VISUALISATIONS--- Mapping visualisations are available for select aspects of this data collection at the WMS endpoints described in this record. For visualisations, spurious GPS locations (typically >5km from adjacent GPS fixes, or otherwise indicating unrealistic movement speeds) were removed. Note that the raw data contains all GPS information reported by the FastLoc system&rft.creator=Goldsworthy, Simon &rft.creator=Angelakis, Nathan &rft.creator=Kirkwood, Roger &rft.date=2023&rft.coverage=westlimit=133.637312; southlimit=-33.11731; eastlimit=134.221566; northlimit=-32.489377&rft.coverage=westlimit=133.637312; southlimit=-33.11731; eastlimit=134.221566; northlimit=-32.489377&rft.coverage=westlimit=136.868236; southlimit=-37.297653; eastlimit=138.462855; northlimit=-35.783062&rft.coverage=westlimit=136.868236; southlimit=-37.297653; eastlimit=138.462855; northlimit=-35.783062&rft.coverage=uplimit=170; downlimit=0&rft.coverage=uplimit=170; downlimit=0&rft_rights=This dataset is hosted by the University of Tasmania, on behalf of SARDI and The University of Adelaide and NESP Marine and Coastal Hub Project 2.6.&rft_rights=Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0/&rft_rights=Cite data as: Goldsworthy, S., Angelakis, N., & Kirkwood, R. (2024). Mapping critical Australian sea lion habitat with animal-borne instruments [Data set]. South Australian Research and Development Institute & NESP Marine and Coastal Hub. https://doi.org/10.25959/MBR6-F262&rft_subject=biota&rft_subject=oceans&rft_subject=Animal-borne video&rft_subject=Satellite-linked GPS logger&rft_subject=Time-depth recorder&rft_subject=Accelerometer&rft_subject=Magnetometer&rft_subject=Bio-logging&rft_subject=Benthic habitats&rft_subject=Habitat mapping&rft_subject=Foraging behaviour&rft_subject=Predation&rft_subject=Southern Australia&rft_subject=Continental shelf&rft_subject=Australian sea lion&rft_subject=Pinniped&rft_subject=Otariid&rft_subject=BENTHIC&rft_subject=MARINE BIOLOGY&rft_subject=EARTH SCIENCE SERVICES&rft_subject=ENVIRONMENTAL ADVISORIES&rft_subject=MARINE ADVISORIES&rft_subject=MARINE ECOSYSTEMS&rft_subject=SEALS/SEA LIONS/WALRUSES&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=MAMMALS&rft_subject=CARNIVORES&rft_subject=DEMERSAL&rft_subject=MACROALGAE (SEAWEEDS)&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=USE/FEEDING HABITATS&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=REEF&rft_subject=MARINE SEDIMENTS&rft_subject=OCEANS&rft_subject=MARINE ENVIRONMENT MONITORING&rft_subject=Time-depth data&rft_subject=GPS data&rft_subject=Accelerometer data&rft_subject=Magnetometer data&rft_subject=Coastal Waters (Australia) | Coastal Waters (Australia) | South Australia Coast, SA&rft.type=dataset&rft.language=English Access the data

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Creative Commons Attribution 4.0 International License
https://creativecommons.org/licenses/by/4.0/

This dataset is hosted by the University of Tasmania, on behalf of SARDI and The University of Adelaide and NESP Marine and Coastal Hub Project 2.6.

Cite data as: Goldsworthy, S., Angelakis, N., & Kirkwood, R. (2024). Mapping critical Australian sea lion habitat with animal-borne instruments [Data set]. South Australian Research and Development Institute & NESP Marine and Coastal Hub. https://doi.org/10.25959/MBR6-F262

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Brief description

This aim of this project is to identify and map critical habitats for Australian sea lions (Neophoca cinerea) to assess the ecological value of different habitats for sea lions and identify risks to their populations. Through this project we collected animal-borne video, GPS, time-depth and accelerometer/magnetometer data from eight adult female Australian sea lions from Olive Island (n=4) on the western Eyre Peninsula and Seal Bay (n=4) on Kangaroo Island in South Australia. Sea lions were instrumented with animal-borne cameras with integrated accelerometers/magnetometers (CATS Cam, 135 x 96 x 40 mm, 400 g) and satellite-linked GPS loggers with integrated time-depth recorders (SPLASH-10, Wildlife Computers, 100 x 65 x 32 mm, 200 g). Sea lions were sedated and anaesthetised and bio-logging instruments were glued to the pelage on the dorsal midline. Bio-logging instruments were recovered after a single foraging trip (~1-6 days). Populations of the endangered Australian sea lion have declined by >60% over the last 40 years. Australian sea lion populations show a marked uneven distribution in abundance across their range, which suggests that localised risk profiles from threats vary at small spatial scales. Fine scale differences in habitat-use are thought to underpin these differences. However, knowledge of the habitats that are critical to Australian sea lions is poor and their vulnerability to human impacts and threats at the fine-scale is not well understood. The data collected in this project provides fundamental information on critical benthic habitats for Australian sea lions, the differences in foraging behaviour of individual sea lions and their prey preferences. The information collected under this project improves our understanding of threats to sea lion populations and will support future conservation actions to recover the species.

Lineage

Maintenance and Update Frequency: notPlanned

Statement: Eight adult female Australian sea lions from Olive Island (n=4) and Seal Bay (n=4) in South Australia were instrumented with animal-borne cameras with integrated accelerometers/magnetometers (CATS Cam, 135 x 96 x 40 mm, 400 g) and satellite-linked GPS loggers with integrated time-depth recorders ((SPLASH-10, Wildlife Computers, 100 x 65 x 32 mm, 200 g). Sea lions were sedated and anaesthetised and bio-logging instruments were glued to the pelage on the dorsal midline. Bio-logging instruments were recovered after a single foraging trip (~1-6 days). High-definition video (anterior perspective) was collected while animals were at sea, at depths greater than 5 meters, during daylight hours (between 0800-1700 local time). Batteries in the camera allowed ~13 hours of filming, this regime hence enabled filming coverage of 2-3 days of time at sea. Satellite-linked GPS loggers collected Fastloc® locations when animals surfaced, by capturing a sub-second snapshot of signals from orbiting satellite constellations at two-minute intervals (the minimum rate programmable). When dive durations exceeded two minutes, locations were sought when the device next surfaced. Locations obtained from four or fewer satellites were discarded. Time-depth recorders (TDRs) measured depth every second. Tria-axial accelerometers measured body movement (G-force), for surge (anterior-posterior), sway (lateral) and heave (dorsal-ventral) axes at 20 Hz. Tri-axial magnetometers measured the earth’s magnetic field intensity in microteslas (µT) for roll (longitudinal, north), pitch (transverse, east) and yaw (vertical, down) axes at 1 Hz. ---DATA STRUCTURE--- Data is organised into a folder for each sea lion, containing the following sub-folders: - CATS Cam Files: Direct data export from CATS camera. The CSV file contains all the dive and environmental attributes recorded by the CATS camera, e.g. accelerometer (units: m/s²), magnetometer (units: μT), depth (units: m), light (raw units: for triggering camera), temperature (°C). - CATS Video Files: Contains all video files collected by the CATS camera. Each filename contains datetime (local) in the YYYYMMDD-HHMMSS - Wildlife Computers File: Contains the raw file from the Wildlife Computers SPLASH-10 tag (users will need the Mk10 Host software, downloaded from the Wildlife Computers website, to open this file). Exported GPS data in a non-proprietary format is contained in the next folder (GPS). - GPS: contains the GPS information collected by the Wildlife Computers SPLASH-10 tag (note these are the files generated when the raw Wildlife Computers file (.wch) is processed to generate the FastLoc GPS locations (KMZ file) on the Wildlife Computers Data Portal site). Users will most likely want the Locations.csv or FastLocGPS.kmz file, which contains lat/lon, datetime, and a quality score for the captured satellite information. - TDR: contains the depth file collected by the Wildlife Computers SPLASH-10 tag (this is the file generated when the raw Wildlife Computers file (.wch) is opened in the Mk10 Host software) ---VISUALISATIONS--- Mapping visualisations are available for select aspects of this data collection at the WMS endpoints described in this record. For visualisations, spurious GPS locations (typically >5km from adjacent GPS fixes, or otherwise indicating unrealistic movement speeds) were removed. Note that the raw data contains all GPS information reported by the FastLoc system

Notes

Credit
National Environmental Science Program (NESP) Marine and Coastal Hub

Credit
The University of Adelaide

Credit
National Environmental Science Program (NESP) Marine and Coastal Hub

Credit
The Ecological Society of Australia (Holsworth Wildlife Research Endowment)

Credit
Department of Primary Industries and Regions SA

Credit
Department for Environment and Water

Credit
Far West Coast Aboriginal Corporation

Data time period: 2022-12-02 to 2023-08-26

This dataset is part of a larger collection

Click to explore relationships graph

text: westlimit=133.637312; southlimit=-33.11731; eastlimit=134.221566; northlimit=-32.489377

text: westlimit=136.868236; southlimit=-37.297653; eastlimit=138.462855; northlimit=-35.783062

text: uplimit=170; downlimit=0

Subjects

User Contributed Tags

Other Information

(DATA ACCESS - selectively browse and download video and tracking files by sea lion individual [warning: video download packages my be large])

uri : https://data.imas.utas.edu.au/attachments/84cb1709-a669-4f2c-b97b-5eceb7929349/raw/ External Link

(View & explore sea lion videos and tracking data in the Seamap Australia mapping portal)

uri : https://seamapaustralia.org/map/#44679973-ab74-4e83-a9f7-b5ec449a15a1 External Link

global : 0bbc661d-d18b-441f-9b81-58810d1cf767

ror : 042gmmd19

ror : 00892tw58

ror : 042gmmd19

Identifiers

DOI : 10.25959/MBR6-F262
global : 84cb1709-a669-4f2c-b97b-5eceb7929349

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