Larval Dungeness crab arrival, abundance, and size in the Salish Sea, British Columbia

This data package contains datasets obtained from counting and measuring larval Dungeness crab (Metacarcinus magister) caught with light traps at various locations across the Salish Sea in British Columbia, Canada. This work is an ongoing collaborative project between the Hakai Institute and numerous community and institutional partners within the Sentinels of Change project led by Hakai Institute. The purpose of this project is to investigate the magnitude and timing of Dungeness larval delivery in the Salish Sea.

Light traps were situated at 20 locations in the Canadian portion of the Salish Sea in the spring of 2022. Light traps were deployed from April 15th to September 1st 2022 (although some started slightly later in the spring). The traps operate on a timer which turns the light on during dark hours and is adjusted through the season. The traps are checked approximately every two days and Dungeness megalopae (final larval stage) are counted each time. The carapace widths of Dungeness megalopae are also measured each week. Initially, measurements were taken by hand using calipers, however this technique was switched starting July 15th 2022 to a photo technique which allows measurements to be taken later using software (ImageJ). This protocol and schedule will be followed in subsequent years until 2030.

This data package includes: -Dungeness megalopae count data from April 15th, 2022 until September 1st, 2022 -Dungeness megalopae size data (when applicable) from April 15th, 2022 until September 1st, 2022

Access and Use

Licence: Creative Commons Attribution-NonCommercial 4.0
Limitations: Appropriate QC may not be applied yet. Data collected by trained volunteers, possible inconsistencies in frequency of light trap checks and identification of species.

Data and Resources

Citation

Keywords

Dataset extent

Map data © OpenStreetMap contributors

Metadata Reference Date(s) November 17, 2022 (Publication)
November 17, 2022 (Revision)
Dataset Reference Date(s) April 15, 2022 (Creation)
Frequency of Update As Needed

Responsible Party 1
Name
Whalen, Matt
Affiliation
Hakai Institute
Email
matt.whalen@hakai.org
Role
  • Custodian
  • Originator
  • Owner
  • Principal Investigator
  • Co Author
Responsible Party 2
Name
Earle, Heather
Affiliation
Hakai Institute
Email
heather.earle@hakai.org
Role
  • Custodian
  • Originator
  • Owner
  • Point of Contact
  • Co Author
  • Editor
  • Contributor
Responsible Party 3
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Distributor
  • Publisher

Field Value
Ocean Variables Invertebrate abundance and distribution
Scope Dataset
Status On Going
Topic Category oceans
Maintenance Note Generated from https://cioos-siooc.github.io/metadata-entry-form
Spatial Extent { "coordinates": [ [ [ -123.5, 48.53 ], [ -125.5, 49.99 ], [ -125.0, 50.37 ], [ -123.0, 49.31 ], [ -123.3, 48.14 ], [ -124.6, 48.45 ], [ -124.5, 48.59 ], [ -123.5, 48.53 ] ] ], "type": "Polygon" }
North Bounding Latitude 48.14
South Bounding Latitude 50.37
East Bounding Longitude -123.0
West Bounding Longitude -125.5
Temporal Extent
Begin
2022-04-15
End
2022-09-01
Vertical Extent
Min
0.0
Max
2.0
Default Locale English
Citation identifier
Code
10.21966/36hp-7f40