Description
This is the OBIS extraction of the Ocean Tracking Network and Norwegian University of Science and Technology (NTNU) Greenland Arctic Charr, consisting of the release tagging metadata, i.e. the location and date when the tagged animal was released, and summarized detection events of tagged individuals. If readers are interested in the source dataset they may also inquire with the project PIs as listed here or on the OTN web site (https://members.oceantrack.org/project?ccode=V2LGAC2).
Abstract:The Arctic charr is a partial migratory species, where some individuals migrate to sea every summer for feeding, while others remain in freshwater their entire life. Since migration is an adaptive response to particular conditions, environmental changes will potentially alter the selective pressures on movement behavior. The changes may also interfere with, or disrupt, a species’ ability to migrate. In either case, environmental changes could lead to the reduction or total loss of a migration with harmful impacts on fish populations. Yet we have little understanding of when to expect these outcomes to occur. Climatic changes are most pronounced in Arctic and subarctic areas, where increases in temperature and precipitation exceed global averages, resulting in changes to the annual growth period . The changes increase favorable temperatures for growth, but stratification in marine fjords may reduce productivity and limit food and hence prolong the marine feeding migration. Hence, it can be expected that changes in migratory phenologies and behavior may be among the first observed response to climate change. Especially, retreating glaciers will initially increase inflow of freshwaters to fjords due to increased melting, but later then the glacier is gone, freshwater run off will be reduced. Consequently, climate change may significantly have an impact on the marine ecosystem used by Arctic during their feeding migration. A recent study from three watercourses in South-western Greenland suggested that the local populations of Arctic charr consisted of a mixture of trophic groups; one group of marine specialists, an estuarine group that may have short and local marine migrations, and two resident morphs from the freshwater habitats. Hence there is a clear potential for a rapid adaptation by the species to changed climatic conditions although the mix of trophic groups may change. To reveal if changed climate may affect migratory behavior and trophic niche use, we will combine acoustic telemetry, physiological sampling techniques, sampling for stable isotopes (SIA) and genomics to examine charr populations in two neighboring fjord systems in Southwestern Greenland. One of the sites receives influx from glacial runoff whereas the other does not. The aim is to quantify variation in migratory tactics and the extent of marine habitat use of anadromous Arctic charr between the two ecologically very different fjord systems, and link distributions to important environmental variables like temperature, salinity and marine productivity. The current lack of knowledge regarding migratory tendencies makes it impossible for resource managers to ensure that different migratory behaviour types are protected, thus ensuring a portfolio of migration strategies are present within a given river system to deal with impending climate change. Knowledge from sites with limited other anthropogenic impacts will be crucial in providing this understanding.
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 221,833 records.
2 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.
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:
Davidsen, J.G., Eldøy, S.H, Piper, A.T., Whoriskey, F., Brodersem, J., Power, M. 2023. Marine migrations and trophic niche use of Arctic charr in Southwest Greenland fjords with and without influx from glacial runoff.. Accessed via the Ocean Tracking Network OBIS IPT on INSERT DATE
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Ocean Tracking Network. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.
GBIF Registration
This resource has not been registered with GBIF
Keywords
ACOUSTIC TAGS; EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH; Occurrence; Samplingevent
External data
The resource data is also available in other formats
| Greenland Arctic Charr | https://members.oceantrack.org/project?ccode=V2LGAC2 ASCII HTM |
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Contacts
- Content Provider
http://orcid.org/0000-0002-9027-3066
- Content Provider
- Originator ●
- Point Of Contact
- Content Provider
- Content Provider
- Principal Investigator
Geographic Coverage
KUJALLEQ
| Bounding Coordinates | South West [60.67, -46.848], North East [61.002, -45.354] |
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Temporal Coverage
| Start Date | 2023-08-15 |
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Project Data
The Arctic charr is a partial migratory species, where some individuals migrate to sea every summer for feeding, while others remain in freshwater their entire life. Since migration is an adaptive response to particular conditions, environmental changes will potentially alter the selective pressures on movement behavior. The changes may also interfere with, or disrupt, a species’ ability to migrate. In either case, environmental changes could lead to the reduction or total loss of a migration with harmful impacts on fish populations. Yet we have little understanding of when to expect these outcomes to occur. Climatic changes are most pronounced in Arctic and subarctic areas, where increases in temperature and precipitation exceed global averages, resulting in changes to the annual growth period . The changes increase favorable temperatures for growth, but stratification in marine fjords may reduce productivity and limit food and hence prolong the marine feeding migration. Hence, it can be expected that changes in migratory phenologies and behavior may be among the first observed response to climate change. Especially, retreating glaciers will initially increase inflow of freshwaters to fjords due to increased melting, but later then the glacier is gone, freshwater run off will be reduced. Consequently, climate change may significantly have an impact on the marine ecosystem used by Arctic during their feeding migration. A recent study from three watercourses in South-western Greenland suggested that the local populations of Arctic charr consisted of a mixture of trophic groups; one group of marine specialists, an estuarine group that may have short and local marine migrations, and two resident morphs from the freshwater habitats. Hence there is a clear potential for a rapid adaptation by the species to changed climatic conditions although the mix of trophic groups may change. To reveal if changed climate may affect migratory behavior and trophic niche use, we will combine acoustic telemetry, physiological sampling techniques, sampling for stable isotopes (SIA) and genomics to examine charr populations in two neighboring fjord systems in Southwestern Greenland. One of the sites receives influx from glacial runoff whereas the other does not. The aim is to quantify variation in migratory tactics and the extent of marine habitat use of anadromous Arctic charr between the two ecologically very different fjord systems, and link distributions to important environmental variables like temperature, salinity and marine productivity. The current lack of knowledge regarding migratory tendencies makes it impossible for resource managers to ensure that different migratory behaviour types are protected, thus ensuring a portfolio of migration strategies are present within a given river system to deal with impending climate change. Knowledge from sites with limited other anthropogenic impacts will be crucial in providing this understanding.
| Title | Marine migrations and trophic niche use of Arctic charr in Southwest Greenland fjords with and without influx from glacial runoff |
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| Funding | OTN is a research and technology development initiative headquartered at Dalhousie University, in Halifax Nova Scotia. OTN is funded by the Canada Foundation for Innovation (CFI) and is grateful to have once received funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Social Sciences and Engineering Research Council of Canada (SSHRC). OTN is also grateful for the continued support from Research Nova Scotia, and OTN's host institution, Dalhousie University. |
| Study Area Description | No study area description for this project was provided to OTN for publication. |
| Design Description | A wide range of aquatic species are tagged with small electronic transmitters, surgically implanted or attached externally, which can operate for up to 20 years. Acoustic receivers arranged in line on the ocean floor as well as attached to buoys, gliders and large animals (e.g. grey seals) pick up the coded acoustic signals from these tags identifying each tagged sea creature that passes within half a kilometer of the receiver. Data collected by these listening stations are subsequently uploaded to one of many compatible data nodes, adding to the reach of an intercompatible network of networks designed and maintained by the Ocean Tracking Network, producing current and reliable records for every part of the globe. Certain classes of electronic tags and listening equipment (receivers) may also be outfitted or co-located with sensors to measure the ocean's temperature, depth, salinity, currents, chemistry, and other properties. |
The personnel involved in the project:
Sampling Methods
Acoustic tags released.
| Study Extent | Program started 2023-08-15 and ran until None |
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| Quality Control | OTN species names are verified using the World Register of Marine Species (WoRMS). If species names on new data cannot be verified against (a) known valid names in OTN, and/or (b) WoRMs the Data Provider will be notified so they can check they are correct. Names that cannot be placed after checking with WoRMS are, where possible, placed on the basis of other authoritative sources, such as the Fishbase or ITIS; and once completely verified a request will be sent to WoRMS for addition of the verified species name. http://members.oceantrack.org/data/discovery/byspecies |
Method step description:
- This resource was created by the Ocean Tracking Network Data Centre as a summarized representation of animal presence determined by electronic tagging efforts. Darwin Core (DwC) records were extracted from the OTN database and filtered and summarized according to international agreed-upon standards.
Bibliographic Citations
- Davidsen, J.G., Eldøy, S.H, Piper, A.T., Whoriskey, F., Brodersem, J., Power, M. 2023. Marine migrations and trophic niche use of Arctic charr in Southwest Greenland fjords with and without influx from glacial runoff. In: Ocean Tracking Network Data Centre, Halifax Canada / otndc@dal.ca Retrieved: 2026-01-14 from db.load.oceantrack.org
Additional Metadata
Access Constraints: none Use Constraints: Acknowledge the use of specific records from contributing databases in the form appearing in the 'Citation' field thereof (if any); and acknowledge the use of the OBIS facility. For information purposes, email to info@obis.org the full citation of any publication made (printed or electronic) that cites OBIS or any constituent part. Recognize the limitations of data in OBIS. See https://manual.obis.org/policy.html#disclaimer for more details
| Purpose | These data are for display on the OBIS portal and associated mapping programs and for download to personal computers for ad-hoc end-user analysis. |
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| Alternative Identifiers | https://members.oceantrack.org/ipt/resource?r=otnntnugreenlandarcticcha |