Maturity of female quillback (Sebastes maliger) and china rockfish (S. nebulosus) from Oregon waters based on histological evaluation of ovaries, Information Reports 2011-01

Identification Information

Citation

Originator: Hannah, R. and M. Blume

Publish Date: March 2011

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: Since 2000, ODFW’s Marine Resources Program has been collecting female maturity data on a variety of groundfish species in an effort to improve the maturity data available for use in stock assessments (e.g. Hannah et al. 2002, Hannah and Parker 2007). For many U.S. west coast groundfish stocks, data on female age and length at maturity is of questionable quality. The maturity curves currently used in some stock assessments are based on macroscopic (visual) assessment of ovary condition. However, there is strong evidence 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). We report here on the development of histologically-based length and age at maturity data for female quillback rockfish (Sebastes maliger) and length at maturity data for female china rockfish (S. nebulosus).

Purpose:

Time Period of Content:

Geographic Extent: Newport, Depoe Bay

Status: Final

Use Constraints:

Format: PDF File

Data Quality Information

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Data Information

No data information was supplied.

Entity and Attribute Information

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

Is a physical copy maintained for reference at Headquarters? No