Published in Scientific Papers. Series D. Animal Science, Vol. LXVI, Issue 2
Written by Maria Desimira STROE, Mirela CREȚU, Floricel Maricel DIMA, Magdalena TENCIU, Gabriel ION
Common carp and Prussian carp are two of the main exploited freshwater fish from the Danube Delta, that's why obtaining information regarding the stock assessment has great importance for population structure. Our study aimed to investigate the parameters of growth and mortality among these populations. From the result of our study, the correlation between length and weight was W = 0.04×Lt2.70 for common carp and W = 0.10×Lt2.47 for Prussian carp. The calculated parameters for mortality were: total mortality (Z) was 1.74 for Common carp and 2.29 for Prussian carp, the natural (M) was 0.82 for Common carp, respectively 1.03 for Prussian carp, while the rate of exploitation reached a value of 0.53 for common carp and 0.55 for Prussian carp. In conclusion, the study analysed mortality due to natural causes, fishing, and overfishing and concluded that both species are currently being overexploited.
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