Atlantic sturgeon, Acipenser oxyrinchus Mitchill, infected by the parasitic leech, Caspiobdella fadejewi (Epshtein) (Hirudinea; Piscicolidae), in the Drwęca River      [RESEARCH ARTICLE]

Aleksander Bielecki; Andrzej Kapusta; Joanna M. Cichocka

doi:10.2478/v10086-011-0010-y

Aleksander Bielecki
Andrzej Kapusta
Joanna M. Cichocka

DOI: https://doi.org/10.2478/v10086-011-0010-y

Keywords: leech, Hirudinea, Piscicolidae, European

Abstract

This study presents the parasitic relationship between the leech, Caspiobdella fadejewi, and the juvenile Atlantic sturgeon, Acipenser oxyrinchus. The aim was to determine leech invasion intensity and extensity and describe parasite feeding location preferences on the ventral side of the snout and gill cavities. The prevalence of C. fadejewi occurrence was 37.3%, at an intensity of one to eight leeches. It was confirmed that the intensity of leech occurrence was positively correlated with sturgeon total length (r=0.545, P<0.05, N=15). The host-searching mechanism is most probably based on positive phototaxis. This is the first record of C. fadajewi from A. oxyrinchus. The leech was first observed during routine examinations of sturgeon collected in June 2008. The leeches were usually attached to the inside lower portion of opercula near the isthmus.

CORRESPONDING AUTHOR:

A. Bielecki [+], J.M. Cichocka
Department of Zoology
University of Warmia and Mazury
Oczapowskiego 5, 10-718 Olsztyn, Poland
e-mail: alekb@uwm.edu.pl
A. Kapusta
Department of Ichthyology
Inland Fisheries Institute in Olsztyn, Poland