Growth rate and condition of vimba, Vimba vimba (Actinopterygii: Cypriniformes: Cyprinidae), a species under restitution in the Odra River estuary
2011
Czerniejewski, P. | Rybczyk, A. | Tanski, A. | Keszka, S. | Antoszek, A.,West Pomeranian University of Technology, Szczecin (Poland). Faculty of Food Sciences and Fisheries
The majority of European populations of vimba, Vimba vimba (L.), have been classified into increasing categories of conservation status while Polish populations of this fish are classified as CR (critically endangered). In many rivers in Poland, including the Odra River, restitution efforts of vimba have been undertaken. Monitoring some biological parameters of the population such as the rate of growth (increase in mass and length), age structure, sex structure, and condition may help to evaluate the success rate of the restitution efforts. In total, 210 individuals of vimba, caught in the waters of the southern part of the Odra River estuary, mainly in Lake Dabie, between May 2007 and June 2008 were studied as to their age, condition, rate of growth in mass and length. Females dominated in the material studied, they constituted over 61% of all individuals. In the age structure groups, females were most often found in groups: 10+ (13.33%), 9+, and 11+ (12.86% each), males were found in the greatest number in 4+, 5+, and 6+ age groups. Fulton and Le Cren coefficients of condition were 0.93 and 1.64, respectively
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