RESEARCH ON THE FLUCTUATING ASYMMETRY OF SOME MORPHOLOGICAL CHARACTERS OF THE FINS OF PERCA FLUVIATILIS SP.
Anca Teusan, V. Teusan, A.A. Prelipcean
Abstract
On our planet, most of the living organisms are characterized by a bilateral simetry of their body. Besides the bilateral symetrical organisms, well manifested, there are many creatures in wich the simetry is disrupted. These asymmetryes may occur as some differences between the right and left side of their bodyes and have most of the time a negative impact over the individuals. This paper reviews some aspects of the fluctuating asymmetry manifested at the length and width of the pectoral and ventral flippers of perch. This kind of data are almost absent in the speciality literature, therefore this study reviews a part of this problem. Four lots were organized according with the age and the weight of the fish. Their weight has been determined by weighing with a digital balance and the measurements have been making using vernier callipers. The age of the fish has been determined by counting the growth rings on the scales. The mean difference found at the pair flippers had values between 0,75 and 1,88 mm for the length of pectoral flippers; between 0,57 and 1,63 mm for the length of the ventral flippers; between 0,43 and 0,84 mm for the pectoral flippers base width; between 0,38 si 0,69 mm for the ventral flippers base width. The differences that were found between the right and the left side of the studied parameters are no statistically significant, although they show the phenomenon of fluctuating asymmetry.
