Fluctuating Asymmetry of the Traits of the Seismosensory System of the Roach Rutilus rutilus (L.) (Cyprinidae, Pisces) and European Perch Perca fluviatilis L. (Percidae, Pisces) in Small Ponds with Various Water Mineralization
https://doi.org/10.35885/1684-7318-2019-3-311-321
Abstract
The number of pores in the seismosensory canals of some paired cover head bones was counted in specimens of the roach and European perch caught in 15 small ponds in the Central-Eastern part of the Udmurt Republic. On the basis of the data obtained, three indices of fluctuating asymmetry were calculated and a statistical analysis was carried out of relationships between these indices and the average (over several years) values of water mineralization of these waterbodies in different periods of the growing season and with the coefficients of their variation. In the roach the average fraction of asymmetric variants of the studied traits was significantly related with the seasonal variability of water mineralization values only, while the perch showed close and statistically significant relationships of this index with the average values of water mineralization in some periods of the growing season. Another index of the roach was similarly associated with these values, namely, the variance of the fluctuating asymmetry of the total values of the paired counting features of the head seismosensory system. Possible mechanisms of the mineralization factor influence on the degree of asymmetric manifestation of the studied traits are discussed considering peculiarities of their gradual formation in the early ontogenesis of the two fish species. As a result, some limitations of the adequate use of these indices in bioindication of anthropogenic pollution of fresh water with dissolved inorganic substances are considered.
About the Author
B. G. Kotegov
Udmurt State University
Russian Federation
Russian Federation
Boris G. Kotegov.
1 Universitetskaya St., Izhevsk 426034.
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Review
For citations:
Kotegov B.G. Fluctuating Asymmetry of the Traits of the Seismosensory System of the Roach Rutilus rutilus (L.) (Cyprinidae, Pisces) and European Perch Perca fluviatilis L. (Percidae, Pisces) in Small Ponds with Various Water Mineralization. Povolzhskiy Journal of Ecology. 2019;(3):311-321. (In Russ.) https://doi.org/10.35885/1684-7318-2019-3-311-321
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