Fisheries research report No. 142 - Identifying the development stages of preserved eggs of snapper, Pagrus auratus, from Shark Bay, Western Australia

Authors

J. Norriss, Department of Primary Industries and Regional DevelopmentFollow
Gary Jackson, Department of Primary Industries and Regional DevelopmentFollow

Publication Date

12-2002

Series Number

142

Publisher

Department of Fisheries

City

Perth, Western Australia

ISBN

1 877098 11 6

ISSN

1035 - 4549

Abstract

The characteristics used to identify 19 developmental stages of preserved eggs of snapper, Pagrus auratus, collected from Shark Bay, Western Australia, during annual plankton surveys, are described and illustrated. A key is provided to enable the age of each egg stage to be estimated based on sea surface temperature and salinity observed during sampling. This report is intended as a reference for inexperienced staff, to ensure that between-year comparisons of snapper spawning biomass, estimated using the daily egg production method, are based on consistent egg staging and ageing methods.

Number of Pages

36

Keywords

Department of Primary Industries and Regional Development, Pagrus auratus, annual stock assessment surveys, daily egg production method

Disciplines

Aquaculture and Fisheries | Environmental Sciences | Marine Biology | Research Methods in Life Sciences

Recommended Citation

Norriss, J.V. and Jackson, G. 2002. Identifying the developmental stages of preserved eggs of snapper, Pagrus auratus, from Shark Bay, Western Australia, Fisheries Research Report No. 142, Department of Fisheries, Western Australia, 29p.