Volume 8
Issue 3
Fisheries
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume8/issue3/abs-06.html
AGE AS WELL AS LENGTH AND WEIGHT GROWTH OF CRUCIAN CARP FROM THE SZCZECIN LAGOON AND THE LESZCZYNSKIE LAKELAND
Agnieszka Rybczyk, Jerzy Szypuła
Department of Fish Biology,
Agricultural University of Szczecin, Poland
ABSTRACT
The study involved crucian carp harvested in various seasons of 2000-2002 from the Szczecin Lagoon (177 individuals) and from the Leszczyńskie Lakeland (707 individuals). The fish age was determined from scales. The length growth was back-calculated with the scale radius-corrected Vovk method in which the standard length was set at 12 mm [10]. In addition, 5 mathematical growth models (Ford-Walford, von Bertalanffy, Gompertz, the second order polynomial, and modified power function) were applied. The weight growth was followed by means of the modified von Bertalanffy equation.
Key words: crucian carp, growth, mathematical growth models.
Agnieszka Rybczyk
Department of Fish Biology,
Agricultural University of Szczecin, Poland
Kazimierza Królewicza 4, 71-550 Szczecin, Poland
email: wieski@fish.ar.szczecin.pl
Jerzy Szypuła
Department of Fish Biology,
Agricultural University of Szczecin, Poland
Kazimierza Królewicza 4, 71-550 Szczecin, Poland
Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.