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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on May 17, 2007
ICES Journal of Marine Science: Journal du Conseil 2007 64(5):973-980; doi:10.1093/icesjms/fsm062
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© 2007 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

The effects of stock enhancement of pikeperch (Sander lucioperca) in Iranian coastal waters of the Caspian Sea

Shahram Abdolmalaki1, and Iwona Psuty2

1 Caspian Sea Bony Fish Research Centre, PO Box 66, Bandar Anzali, Iran
2 Sea Fisheries Institute, Kollataja 1, 81-332 Gdynia, Poland

Correspondence to S. Abdolmalaki: tel: +98-181-3224055; fax: +98-181-3223070; e-mail: abdolmalaki2001{at}yahoo.com

Abdolmalaki, S., and Psuty, I. 2007. The effects of stock enhancement of pikeperch (Sander lucioperca) in Iranian coastal waters of the Caspian Sea. – ICES Journal of Marine Science, 64: 973–980.

Annual landings of pikeperch (Sander lucioperca) in Iranian coastal waters of the Caspian Sea in the early years of its exploitation, the late 1920s and early 1930s, reached some 3000 t. However, after 1935, catches declined drastically through overfishing, declining sea level, and the destruction of spawning grounds in the Anzali Lagoon. In 1990, Iran initiated a programme of artificial culture to enhance the local stock. The aim of the programme was and still is to restore the formerly abundant population of this predatory fish and to increase the profitability of the beach-seine fisheries of fishers who had stopped deploying gillnets, which pose a threat to the valuable species of sturgeon in the Caspian. Analysis of the age composition of pikeperch catches indicates that the use of beach-seines does not prevent overfishing of young pikeperch released as fingerlings in the same calendar year in which the fishing season started. No undersized fish are discarded back into the sea, because there is market demand for even the smallest fish, and a lack of communication exists between the programme beneficiaries and the management and research units. Some 15 years after it was initiated, the effectiveness of stock enhancement at a level of 4–6million fry per year remains uncertain.

Keywords: Caspian Sea, multispecies fishery, pikeperch, Sander lucioperca, stock enhancement

Received 28 April 2006; accepted 21 March 2007; advance access publication 17 May 2007.


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