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Biology and fishery of pilchard, Sardinops sagax (Clupeidae), within a large south-eastern Australian bay

Citation

Neira, FJ and Sporcic, M and Longmore, A, Biology and fishery of pilchard, Sardinops sagax (Clupeidae), within a large south-eastern Australian bay, Marine and Freshwater Research, 50, (1) pp. 43-55. ISSN 1323-1650 (1999) [Refereed Article]

DOI: doi:10.1071/MF98067

Abstract

Length-frequency and maturity data of pilchards (Sardinops sagax) are described from monthly purse-seine commercial catch samples obtained in Port Phillip Bay (Victoria) between December 1994 and January 1997. These data, together with findings of a 12-month ichthyoplankton bay survey from September 1995 to August 1996, were used to determine the size at which pilchards recruit to the bay fishery and whether they spawn within this system. Monthly pilchard catch rates between January 1990 and June 1996 are also described and analysed in terms of environmental variables during that period. Results show that pilchards do not generally attain sexual maturity or spawn within the bay but use it as a nursery area, entering this system mostly as 0+ to 1+ year-old juveniles (4-12 cm fork length, FL) in late spring-early summer and returning to sea the following winter. This migration is supported by the marked seasonality in catch rates, which each year peak in March-May and are lowest in August-October. The seasonality was adequately explained by temperature lagged 2 months in a multivariate time-series model. Port Phillip Bay appears to be the only semi-enclosed, shallow marine embayment in temperate Australia that supports a substantial pilchard fishery that, in addition, is based predominantly on juveniles.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fish Physiology and Genetics
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Neira, FJ (Dr Francisco Neira)
ID Code:36046
Year Published:1999
Web of Science® Times Cited:22
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2005-12-13
Last Modified:2011-11-18
Downloads:0

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