Hydroacoustic Estimates of Squid (Loligo opalescens) Abundance Off Oregon in 1985 Information Report 85-9

Identification Information

Citation

Originator: Richard Starr, ODFW

Publish Date: Dec 1985

Online Link: None

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Cedric Cooney

Job Position: Natural Resources Data and Systems Manager

Telephone: 503-947-6094

E-Mail Address: Cedric.X.Cooney@odfw.oregon.gov

Description

Abstract: Quantitative acoustic surveys off the central Oregon coast produced estimates of squid (Loligo opalescens) distribution and abundance from a 10 km2 area. Squid resided in the middle of the water column early in the study and in the upper one-third later. The center of spawning activity moved southward and shoreward with time. Maximum volumetric densities of squid in any 200 m segment of transect ranged from 2.1 to 83.9 squid/m3. Maximum areal densities in any file ranged from 8.8 to 178.9 squid/m2 of surface area. Average areal densities for an entire transect ranged from 0.8 to 19.2 squid/m2. Analysis of weight to length ratios of squid commercially harvested in the study area indicated that two different groups of squid entered the study area over the five week study period. The largest school observed covered a surface area of 2.1 km2 and contained an estimated 31.4 million squid. Biomass of the largest school was estimated to be 1714 mt. Including commercial harvest, the lower and upper biomass estimates were 2108 and 3735 mt, respectively.

Purpose:

Time Period of Content:

Geographic Extent: Oregon

Status: Final

Use Constraints:

Format: PDF File

Data Quality Information

Lineage-Source:

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Not yet described

Bibliography Information

Field Name	Value
Biblio ID	5606
Year	1985
Publisher
Request Type	Information Report
Location	Salem HQ
Date Created
Date Cataloged	6/22/05
Date Published	Dec 1985
Type	info repo
Pages	41 pp
Volume	85-9
Status	2
Descriptor	Squid; Hydroacoustic estimate; Oregon coast
Date Entered	2005-06-22 00:00:00
Location In Clackamas Library	S wall, yellow info reports top row
Author	Richard M Starr
Duplicates	0
Number Remaining After Requests	2
Presumed All Distributed
Back Room Duplicates
Author	R. Starr
Risk
Species
Disposition Of Requests	State Archive: Request filled
Disposition Of Requests	StreamNet Library: Duplicate request
Disposition Of Requests	StreamNet Library: Request filled

Is a physical copy maintained for reference at Headquarters? Yes