Habitat use by juvenile Dungeness crabs in coastal nursery estuaries

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Christopher N. Rooper

Originator: David A. Armstrong

Originator: Donald R. Gunderson

Publication_Date: 2002

Title:

Habitat use by juvenile Dungeness crabs in coastal nursery estuaries

Geospatial_Data_Presentation_Form: Digital

Series_Information:

Series_Name: Crabs in Cold Water Regions: Biology, Management, and Economics

Issue_Identification: Alaska Sea Grant Program, AK-SG-02-01, Pg. 609-629

Publication_Information:

Publication_Place: Seattle, WA

Publisher: Alaska Sea Grant College Program

Description:

Abstract:

Juvenile Dungeness crabs are found extensively throughout U.S. West Coast estuaries. Trawl surveys targeting juvenile Dungeness crabs were conducted in the summers of 1998-2000 in four West Coast estuaries: Coos Bay and Yaquina Bay, Oregon, and Grays Harbor and Willapa Bay, Washington. Additional data from surveys in Willapa Bay (1985-1988) and Grays Harbor (1983-1988) were also utilized in this study. Densities of age 0+ and age 1+ juvenile crabs were analyzed using analysis of variance techniques for each of the four estuaries. Patterns of crab density in each of the four estuarine systems suggest they prefer lower side channel sites close to the estuary mouth. Our trawl survey data indicate that crabs utilize these subregions of estuaries which are characterized by borad intertidal flats with extensive secondary subtial channels. These subregions are further characterized by abundant local refuge (shell, macroalgae), high prey abundance, shallow depths, temperatures less than 18ºC, and relatively high salinities. Significant interannual variation was evident for both age classes. Mean density of age 0+ crabs varied by a factor of 54 over the years studies, while mean density varied only by a factor of 7 for age 1+ crabs.

Purpose:

This study assesses the habitat use by juvenile Dungeness crabs using data collected from trawl surveys of coastal estuaries. The objective of these surveys was to determine consistent patterns in spatial use of nursery habitat across four estuaries and a number of years. Additionally, the density of juvenile Dungeness crabs was compared to the dominant habitat features associated with their spatial locations.

Supplemental_Information:

Data included in usSEABED are sediment collected in support of this study. Data given to Mark Zimmermann, NOAA, from Chris Rooper, UW, 2002. Data digitized by the USGS for inclusion into usSEABED (<http://walrus.wr.usgs.gov/usseabed>)

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1983

Ending_Date: 2000

Currentness_Reference: Publication date

Status:

Progress: complete

Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -125.34500

East_Bounding_Coordinate: -123.90300

North_Bounding_Coordinate: 47.00700

South_Bounding_Coordinate: 43.31864

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: University of Washington

Theme_Keyword: Department of School of Aquatic and Fishery Sciences

Theme_Keyword: Grab sample

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: Oceans and Estuaries

Theme_Keyword: Location

Theme_Keyword: GeoscientificInformation

Theme:

Theme_Keyword_Thesaurus:

NASA/Global Change Master Directory (GCMD) Earth Science Keyword. Version 5.3.3

Theme_Keyword: Marine Sediment

Theme_Keyword: Sediment textures

Theme_Keyword: Sediment composition

Place:

Place_Keyword_Thesaurus: Geographic Names Information System

Place_Keyword: Washington

Place_Keyword: Grays Harbor

Place_Keyword: Willapa Bay

Place_Keyword: Oregon

Place_Keyword: Yaquina Bay

Place_Keyword: Coos Bay

Access_Constraints: None

Use_Constraints:

Cite Christopher N. Rooper, David A. Armstrong, Donald R. Gunderson, and the University of Washington as originators of the data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of Washington

Contact_Address:

Address_Type: Mail

Address: P.O. Box 357940

Address: University of Washington

City: Seattle

State_or_Province: WA

Postal_Code: 98195

Contact_Voice_Telephone: 206-543-5060

Browse_Graphic:

Browse_Graphic_File_Name: Rooper_2002

Browse_Graphic_File_Description:

Screen grab of GIS-produced sample distribution, with bathymetry and land for reference.

Browse_Graphic_File_Type: JPG

Data_Set_Credit:

Rooper; C.N.; Armstrong; D.A.; and Gunderson; D. at the Alaska Sea Grant Program for the collection, analysis, and compilation of data; Mark Zimmermann (NOAA) for facilitation of data donation to usSEABED, usSEABED formatting and corrections Jane Reid (USGS) and Chris Jenkins (University of Colorado).

Native_Data_Set_Environment:

Tkme: Another editor for formal metadata by Peter N. Schweitzer (U.S. Geological Survey, Reston, VA 22092), version 2.9.13, Microsoft Windows Version 5.1; Microsoft Word 2000 9.0

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No estimate made for the accuracy of the data in the original report. Data digitized by the USGS and partners were visually compared to the source data, and corrected. Where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS.

Logical_Consistency_Report: Data fall within normal ranges for the given parameters.

Completeness_Report: All data provided by authors included in usSEABED.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: Navigation by GPS. Latitudes and longitudes as decimal degrees.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Water depth not included in data file.

Lineage:

Process_Step:

Process_Description:

"In 1998 a benthic grab was used to collect a sediment sample at each site. In the laboratory a subsample of approximately 100 g was removed for analysis. Hydrogen peroxide was used to remove organicmaterial, and the sample was then dried for 2-4 hours. The sample was weighed, placed on a stack of sieves ranging in size from 1 mm to 0.62 microns, and shaken using a Ro-Tap machine for 15 minutes. The resulting components of the sample in each sieve size were weighed."

Process_Date: 1998

Source_Produced_Citation_Abbreviation: Rooper_et_al_2002

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of Washington

Contact_Address:

Address_Type: Mail

Address: P.O. Box 357940

Address: University of Washington

City: Seattle

State_or_Province: WA

Postal_Code: 98195

Contact_Voice_Telephone: 206-543-5060

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 69

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.01667

Longitude_Resolution: 0.01667

Geographic_Coordinate_Units: Decimal degrees

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Point

Entity_Type_Definition: SDTS point

Entity_Type_Definition_Source: Source datafile

Attribute:

Attribute_Label: Sample number

Attribute_Definition: Sample number

Attribute_Definition_Source: Source datafile

Attribute_Domain_Values:

Unrepresentable_Domain:

Alpha numeric number based on physiographic location and core information

Attribute:

Attribute_Label: Sieve size analysis

Attribute_Definition: Weight percent of sample caught in given sieve.

Attribute_Definition_Source: Source report

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: >-1 phi

Range_Domain_Maximum: < 4 phi

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Shell

Attribute_Definition: Shell percentage in given sieve size

Attribute_Definition_Source: Source datafile

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 50

Range_Domain_Maximum: 100

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 1.0

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of Washington

Contact_Address:

Address_Type: Mail

Address: P.O. Box 357940

Address: University of Washington

City: Seattle

State_or_Province: WA

Postal_Code: 98195

Contact_Voice_Telephone: 206-543-5060

Resource_Description:

Sediment data collected in support of "Crabs in Cold Water Regions: Biology, Management, and Economics; Alaska Sea Grant College Program, AK-SG-02-01"

Distribution_Liability:

Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies and limitations of the sampling data.

Standard_Order_Process:

Non-digital_Form:

Published paper is available at selected libraries; sediment data at the University of Washington.

Fees: Unknown

Technical_Prerequisites: None

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2002

Metadata_Reference_Information:

Metadata_Date: 2005

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Jane A. Reid

Contact_Position: Geologist

Contact_Address:

Address_Type: Physical and mail

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4727

Contact_Electronic_Mail_Address: jareid@usgs.gov

Contact_Instructions: Email preferred

Metadata_Standard_Name: CSDGM Version 2

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints:

Metadata was written by a user of the data. Any information contained in the physical report is authoritative and supercedes any information given here.