THE ABSOLUTE FECUNDITY OF VIMBA VIMBA (L.) FROM LAKE OSTROWIECKIE (ODER RIVER CATCHMENT AREA,
Piotr Hliwa, Andrzej Martyniak
University of Warmia and Mazury in Olsztyn, Poland
ABSTRACT. The fecundity of a local, stationary population of vimba bream Vimba vimba (L.) from Lake Ostrowieckie (Oder River drainage area, northwest Poland) was analyzed. The number of eggs in the ovaries was determined by the weight method. The individual absolute fecundity of vimba bream ranged from 9,560 to 157,000 eggs for females measuring from 19.2 to 34.0 cm and weighing from 121 to 693 g. Fecundity varied in the designated size classes from 21 thousand eggs for individuals below 22.0 cm to 104 thousand eggs for the largest ones (longer than 30.1 cm). The average fecundity in the youngest group of females (4+) was 25.6 thousand eggs, while that in the oldest group (9+) was 120.1 thousand eggs. Correlation analysis of absolute fish fecundity versus selected biometric parameters showed a significant dependence.
Key words: VIMBA BREAM (VIMBA VIMBA), ABSOLUTE FECUNDITY, DRAWA/ODER CATCHMENT AREA
Piotr Hliwa, Uniwersytet Warmińsko-Mazurski, Zakład Genetyki Ewolucyjnej, ul. Oczapowskiego 5, 10-957 Olsztyn, Tel./Fax: +48 89 5234787; e-mail: email@example.com