1990 Reference Survey Trawl Fish Abundance

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:

Southern California Coastal Water Research Project (SCCWRP)

Publication_Date: 20040402

Publication_Time: 20000402

Title: 1990 Reference Survey Trawl Fish Abundance

Edition: 1.0

Publication_Information:

Publication_Place: Costa Mesa, California

Publisher:

Southern California Coastal Water Research Project (SCCWRP)

Online_Linkage:

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Description:

Abstract:

Fish and macroinvertebrate communities near major wastewater outfalls in southern California have been monitored for over twenty years. The objective of the monitoring is to determine the impact of the wastewater discharge on these communities. Since marine communities are variable both in space and time, the determination of impact is usually achieved by comparing conditions in the vicinity of the outfalls to conditions in "reference" areas, that is, areas believed to be free from impacts from human activities. On three occasions SCCWRP has conducted surveys of sediment characteristics, contaminant levels, and biological conditions on the southern California mainland shelf in order to provide reference values for comparison to data collected from areas affected by wastewater discharge. The first survey was conducted in 1977 (Word and Mearns 1979). Seventy benthic grab samples and 53 trawl samples were taken from 71 stations distributed at approximately 1 0-kilometer intervals between Point Conception and the Mexican Border. Samples were taken at a depth of approximately 60 meters because most of the major outfalls discharge at this depth. In 1985, 13 of the original 71 stations were reoccupied (Thompson et al. 1987). Samples were taken at 30, 60 and 1 50 meters in order to provide data for the range of depths sampled in the monitoring programs. The third SCCWRP reference survey was conducted in 1990.

Purpose:

This report contains the results of the 1990 survey. It also updates the preceding reports, with several differences. New in the 1990 Reference Survey are estimates of reference values for near-bottom salinity; total nitrogen, iron, and manganese ; and nine polynuclear aromatic hydrocarbon (PAHs) compounds in sediments. Variables reported in previous surveys that are not included in this report are estimates for contaminants in tissues, concentrations of lindane, hexachlorobenzene, o,p' DDD, lipids, total volatile solids (TVS), and several PAH compounds in sediments. The 1990 survey was designed to update the information collected in the 1977 and 1985 surveys.

Supplemental_Information:

Ships used: Marine Surveyor, Ocean Sentinal, Monitor III

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19900730

Ending_Date: 19900807

Currentness_Reference: ground condition

Status:

Progress: COMPLETE

Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Description_of_Geographic_Extent: Southern California Bight

Bounding_Coordinates:

West_Bounding_Coordinate: -119.17275

East_Bounding_Coordinate: -117.190233

North_Bounding_Coordinate: 34.08835

South_Bounding_Coordinate: 32.54203

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Southern California Bight

Access_Constraints: None

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Information Systems Manager

Contact_Address:

Address_Type: physical address

Address: 3535 Harbor Blvd., Suite 110

City: Costa Mesa

State_or_Province: California

Postal_Code: 92626

Country: USA

Contact_Voice_Telephone: 714.755.3200

Contact_Facsimile_Telephone: 714.438.1016

Contact_Electronic_Mail_Address: im_contact@sccwrp.org

Hours_of_Service: 8:00 a.m. to 4:00 p.m. Monday Through Friday

Contact_Instructions: email preferred

Data_Set_Credit:

Dr. Bruce Thomson, David Tsukada, Diane O’Donahue, Dario Diehl, Harold Stubbs, Pat Hershelman, Karen Smith, Tim Rothans, Mike Kelly, Steve Lagos

Native_Data_Set_Environment: Microsoft Access Version 2000