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1 Oceanological and Hydrobiological Studies

1 2006

1 Rolbiecki L.

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Correlation between the occurrence of parasites and body length of roach, carp bream, European perch, zander, and ruffe in the Vistula Lagoon estuary

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Rolbiecki L.

2006

tom Vol. 35, No.3

257-267

The abundance and composition of parasitic faunas change with fish size (age). The correlation between the occurrence of parasites and body length of cyprinids (carp bream and roach) and percids (European perch, zander, and ruffe) in the Vistula Lagoon was analysed, based on 1856 fish specimens caught between 1994-1997. Of the 63 parasitic taxa identified, the presence of 17 was found to correlate with fish size. Differences in parasitic infection between fish length classes could be caused by body size (fish body surface), volume of water swallowed during active breathing of the fish, type of food ingested, life history (migrations, aggregation of fish fry and spawning adults), and the degree of resistance as well as accumulation of parasites (particularly larvae), predation (elimination of infected fish), and commercial fisheries.