|Issue № 4||
small forest lake
Summary: In Karelia the common whitefish biology, including its feeding, is well studied in large water bodies, but not in small lakes. We studied the peculiarities of feeding common whitefish and river perch in a small forest Lake Padashulkayarvi in the north of Karelia. It was established that these fishes use the same forage reserve, the basis of the juvenile diet is zooplankton, but grown-up individuals prefer zoobenthos. The fact that the whitefish feed mostly on shellfish and perch - on caddis flies is specific for this water body. At that, unlike other water bodies, feeding on flying insects is more typical of perch than of whitefish. Separation of trophic niches is obviously provided dynamically – by the distribution of consumed resources in space and time. Slight overlapping of the niches of the whitefish and perch is determined by the Morrisita-Horn index. Absence of acute competitive tension makes possible the coexistence of populations of whitefish and perch in a small water body.
© Petrozavodsk State University
Received on: 17 September 2017
Published on: 21 December 2017
Biology of the river perch. M.: Nauka, 1993. 188 p.
Dyatlov M. A. Fish of Lake Ladoga. Petrozavodsk: KarNC RAN, 2002. 281 p.
Hammer Ø., Harper D. A. T., Ryan P. D. PAST: Paleontological statistics software package for education and data analysis, Palaeontologia Electronica. 2001. Vol. 4. No. 1. P. 1–9. URL: https://folk.uio.no/ohammer/past/ (data obrascheniya: 15.06.2017).
Horn H. S. Measurement of "Overlap" in comparative ecological studies, The American Naturalist. 1966. Vol. 100. No. 914. P. 419–424.
Hothorn T., Hornik K., van de Wiel M. A., Zeileis A. Package ‘coin’. Conditional inference procedures in a permutation test framework. Ver. 1.0-11. 2010. URL: http://cran.opensourceresources.org/index.html (data obrascheniya: 20.06.2017).
Ivanter E. V. Korosov A. V. Introduction to quantitative biology. Petrozavodsk: Izd-vo PetrGU, 2014. 298 p. URL: http://elibrary.karelia.ru/book.shtml?levelID=003&id=21497&cType=1 (data obrascheniya: 01.07.2017).
Korosov A. V. Gorbach V. V. Computer processing of biological data. Petrozavodsk: Izd-vo PetrGU, 2010. 86 p. URL: http://elibrary.karelia.ru/book.shtml?levelID=031&id=15287&cType=1 (data obrascheniya: 01.07.2017).
Methodical manual on the study of nutrition and food relations of fish in vivo. M.: Nauka, 1974. 254 p.
Pervozvanskiy V. Ya. Fish of Kostomuksha iron ore deposit ponds (ecology, reproduction, use). Petrozavodsk: Kareliya, 1986. 216 p.
Petrova L. P. Kuderskiy L. A. Vodlozero: nature, fish, fishery. Petrozavodsk: KarNC RAN, 2006. 198 p.
Plohinskiy N. A. Biometrics. M.: Izd-vo MGU, 1970. 367 p.
Popova O. A. Reshetnikov Yu. S. On complex indices in the study of fish nutrition, Voprosy ihtiologii. 2011. T. 51. No. 5. P. 712–717.
Sterligova O. P. Il'mast N. V. Savosin D. S. Cyscloslomatous and freshwater fish of Karelia. Petrozavodsk: Karel'skiy nauchnyy centr RAN, 2016. 224 p.