Length and Age at Maturity of Female Cooper Rockfish (Sebastes caurinus) from Oregon Waters Based on Histological Evaluation of Ovaries, Information Report 2014-04

Identification Information

Citation

Originator: Hannah, Robert W.

Publish Date: 2014

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: This is the seventh publication in a series documenting results from a long-term sampling program aimed at developing improved female maturity data for a variety of groundfish species commonly captured in Oregon fisheries. When this study was initiated in 2000, the available data on female age and length at maturity for many U.S. west coast groundfish species was of questionable quality. The maturity curves then used in stock assessment models were typically based on macroscopic (visual) assessment of ovary condition. However, there is a large amount of evidence showing that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). In previous publications in this series, new female maturity data have been developed for petrale sole (Eopsetta jordani, Hannah et al. 2002), Pacific ocean perch (Sebastes alutus, Hannah and Parker 2007), yelloweye rockfish (S. rubberimus) and cabezon (Scorpaenichthys marmoratus, Hannah et al. 2009), aurora rockfish (S. aurora, Thompson and Hannah 2010), quillback (S. maliger) and china rockfish (S. nebulosus, Hannah and Blume 2011) and vermilion rockfish (S. miniatus, Hannah and Kautzi 2012). This report describes the development of histologically-based length- and age-at-maturity data for female copper rockfish (Sebastes caurinus).

Purpose:

Time Period of Content:

Geographic Extent: Landings in ports of Newport and Depoe Bay

Status: Final

Use Constraints:

Format: PDF

Data Quality Information

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Data Information

No data information was supplied.

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Attributes Description: Field attribute information is available in the attached file(s).

Is a physical copy maintained for reference at Headquarters? Unknown