Description
This is the OBIS extraction of the Ocean Tracking Network and National Oceanic and Atmospheric Administration (NOAA) Investigation of Dredged Sediment Deposition Events on Dungeness Crab at the Mouth of the Columbia River, 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=NEP.MCR).
Abstract:This research is an experiment to investigate dredged sediment deposition events on Dungeness crab, Cancer magister. Our main site is in the nearshore ocean just south of the mouth of the Columbia River, with other receivers located north of the river mouth and inside the estuary. We have three years of data (2014-2016) conducted in late August through October, which is when sediment deposition is allowed. The first two years we used a similar design. There were 2 arrays (control and impact, separated by ~1.8 km) of 4 receivers each arranged in a square formation. Receiver moorings in an array were ~300 meters apart. Each mooring had a V2RW or VR2Tx receiver located 7 m above the bottom and a synch tag 8 m above the bottom (for V2RW units). A subsurface float kept the mooring line near-vertical. We used this arrangement with the Vemco VPS to compare trajectories of crabs at impact and control treatments. In 2015 we also had 2 receivers along the South Jetty for a portion of the study (SJ.1 and SJ.2) to act as a “gateway”. In 2016 we expanded and re-arranged the receivers into 13 receivers in a 3 x 5 node rectangle formation (minus 2 interior nodes). The array was divided into impact (north) and control (south) sub-arrays. We also deployed 2 moorings as a gateway near the South Jetty, as in 2015. Synch tag signals from these moorings (which were in contact with each other) may be detected by some of the moorings in the main array. A third mooring was positioned several kilometers away as a lone sentinel. It recorded presence of some our tagged crabs but was outside the range of the other receivers. Two additional nodes were deployed inside the Columbia River Estuary (ETI and TS), also out of range of other receivers. During an experiment, we released batches of 10 crabs in the center of each subarray. In the impact array, a large hopper dredge deposited a plume of sediment on the crabs\; the control array received no sediment. We repeated the experiment three time in 2014 and 2015 and twice in 2016. In 2016, we also released 20 tagged crabs in the estuary. There were reference tags deployed in each array as well. Tags on the Dungeness crab had > 200 d battery life, and the crabs are capable of significant movements in that period.
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 18,087 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.
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:
Roegner, G. 2014. Investigation of Dredged Sediment Deposition Events on Dungeness Crab at the Mouth of the Columbia River. 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
| Investigation of Dredged Sediment Deposition Events on Dungeness Crab at the Mouth of the Columbia River | https://members.oceantrack.org/project?ccode=NEP.MCR ASCII HTM |
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Contacts
- Originator ●
- Point Of Contact
- Principal Investigator
http://orcid.org/0000-0003-0621-343X
Geographic Coverage
WA
| Bounding Coordinates | South West [46.19, -124.1], North East [46.32, -123.97] |
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Taxonomic Coverage
Species included below are tagged by this project and have left any embargo. Other individuals or species may later be appended to this dataset.
| Species | Cancer magister (Dungeness crab) |
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Temporal Coverage
| Start Date / End Date | 2014-08-15 / 2016-10-31 |
|---|
Project Data
This research is an experiment to investigate dredged sediment deposition events on Dungeness crab, Cancer magister. Our main site is in the nearshore ocean just south of the mouth of the Columbia River, with other receivers located north of the river mouth and inside the estuary. We have three years of data (2014-2016) conducted in late August through October, which is when sediment deposition is allowed. The first two years we used a similar design. There were 2 arrays (control and impact, separated by ~1.8 km) of 4 receivers each arranged in a square formation. Receiver moorings in an array were ~300 meters apart. Each mooring had a V2RW or VR2Tx receiver located 7 m above the bottom and a synch tag 8 m above the bottom (for V2RW units). A subsurface float kept the mooring line near-vertical. We used this arrangement with the Vemco VPS to compare trajectories of crabs at impact and control treatments. In 2015 we also had 2 receivers along the South Jetty for a portion of the study (SJ.1 and SJ.2) to act as a “gateway”. In 2016 we expanded and re-arranged the receivers into 13 receivers in a 3 x 5 node rectangle formation (minus 2 interior nodes). The array was divided into impact (north) and control (south) sub-arrays. We also deployed 2 moorings as a gateway near the South Jetty, as in 2015. Synch tag signals from these moorings (which were in contact with each other) may be detected by some of the moorings in the main array. A third mooring was positioned several kilometers away as a lone sentinel. It recorded presence of some our tagged crabs but was outside the range of the other receivers. Two additional nodes were deployed inside the Columbia River Estuary (ETI and TS), also out of range of other receivers. During an experiment, we released batches of 10 crabs in the center of each subarray. In the impact array, a large hopper dredge deposited a plume of sediment on the crabs\; the control array received no sediment. We repeated the experiment three time in 2014 and 2015 and twice in 2016. In 2016, we also released 20 tagged crabs in the estuary. There were reference tags deployed in each array as well. Tags on the Dungeness crab had > 200 d battery life, and the crabs are capable of significant movements in that period.
| Title | Investigation of Dredged Sediment Deposition Events on Dungeness Crab at the Mouth of the Columbia River |
|---|---|
| Funding | No funding information for this project was provided to OTN for publication. Details of OTN's funding are below. 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 2014-08-15 and ran until 2016-10-31 |
|---|---|
| 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
- Roegner, G. 2014. Investigation of Dredged Sediment Deposition Events on Dungeness Crab at the Mouth of the Columbia River In: Ocean Tracking Network Data Centre, Halifax Canada / otndc@dal.ca Retrieved: 2017-05-29 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 | 10.14286/2vtusa |
| https://members.oceantrack.org/ipt/resource?r=otnnoaainvestigationofdre |