Name: Rocky Mountain Ridged Mussel Survey Locations

Display Field: Index_Site

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Rocky Mountain Ridged Mussels (Gonidea angulata) are listed under the Species at Risk Act (SARA) as a species of special concern and have been re-assessed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) as endangered. These fresh water mussels are only found in Canada in the Okanagan Valley of British Columbia. As a continuation of previous work and to inform future assessments and conservation efforts within this geographic range, seven easily accessible sites known to have high densities of G. angulata were selected as prospective index sites to monitor relative abundance (i.e. mussel bed density) using snorkel surveys. For lake sites, a two-stage sampling design was conducted using transects and quadrats. For the river site, cumulative counts from sides of the river were collected. Some sites were sampled only once while others were sampled multiple times from 2011-2016. Mean mussel densities across all surveys ranged from 0.19 to 2.86 mussels/m2, corresponding to site abundance estimates ranging from 102 to 3,276 mussels. Depth measurements were also taken at most sites to inform the Fish Water Management Tool of the Okanagan Water Management Board.

Service Item Id: 4e69cc09e7eb4437816039ce39de4992

Copyright Text:

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -119.65078
YMin: 49.297649
XMax: -119.35226
YMax: 50.24958
Spatial Reference: 4326  (4326)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSMSCircle
Color: [155, 176, 0, 255]
Size: 4.0
Angle: 0.0
XOffset: 0
YOffset: 0
Outline:
[0, 0, 0, 255] Width: 1
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: false
Supports OrderBy: false
Supports Distinct: false
Supports Pagination: false
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: false
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• FID ( type: esriFieldTypeOID, alias: FID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Year_Surve ( type: esriFieldTypeInteger, alias: Year Surveyed )
• Index_Site ( type: esriFieldTypeString, alias: Index Site, length: 254 )
• Latitude ( type: esriFieldTypeDouble, alias: Latitude (decimal degrees) )
• Longitute ( type: esriFieldTypeDouble, alias: Longitude (decimal degrees) )
• Closest_Mu ( type: esriFieldTypeString, alias: Closest Municipality, length: 254 )
• Area__m2_ ( type: esriFieldTypeInteger, alias: Area (m sq.) )
• Mean_Densi ( type: esriFieldTypeDouble, alias: Mean Density (mussels / m sq.) )
• Standard_E ( type: esriFieldTypeDouble, alias: Density Standard Error (SE) )
• Population ( type: esriFieldTypeInteger, alias: Population Estimate )
• Standard_1 ( type: esriFieldTypeInteger, alias: Population Standard Error (SE) )
• Data ( type: esriFieldTypeString, alias: Data, length: 254 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata