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Layer: Herring Spawning Habitat (ID: 71)

Parent Layer: Fish Survey data

Name: Herring Spawning Habitat

Display Field: HERRING_PRESENCE_DETECTED

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This layer contains information on river herring (alewife, Alosa pseudoharengus and blueback herring, Alosa aestivalis) spawning habitat surveys conducted by the Smithsonian Environmental Research Center (SERC) Bay (M. Ogburn, SERC, unpublished data). Surveys were conducted at 27 sites in the Choptank River and its tributaries from March-May 2016; each site was visited 1-3 times. The presence of river herring adults and/or icthyoplankton, which is an indication of spawning activity, was determined in three ways: 1) visual observation of adult river herring, 2) capture of adult river herring by cast net, or 3) presence of likely river herring eggs or larvae in ichthyoplankton samples (which could also include hickory shad eggs). Ichthyoplankton samples were taken for five minutes following the standard methods used by MD DNR. This layer shows points where surveys have been conducted in the Choptank and whether adult and/or icthyoplankton river herring were observed.

Copyright Text: Smithsonian Environmental Research Center

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

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

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