Roach (Rutilus rutilus) populations respond to varying environment by altering size structure and growth rate.

Show full item record



Permalink

http://hdl.handle.net/10138/174492

Citation

Olin , M J , Rask , M , Estlander , S K , Horppila , J A , Nurminen , L K L , Tiainen , J M , Vinni , M T & Lehtonen , H V T 2017 , ' Roach (Rutilus rutilus) populations respond to varying environment by altering size structure and growth rate. ' , Boreal Environment Research , vol. 22 , pp. 119-136 .

Title: Roach (Rutilus rutilus) populations respond to varying environment by altering size structure and growth rate.
Author: Olin, Mikko Johannes; Rask, Martti; Estlander, Satu Katriina; Horppila, Jukka Antero; Nurminen, Leena Kaisa Lovisa; Tiainen, Joni Matias; Vinni, Mika Tapio; Lehtonen, Hannu Väinö Tapani
Contributor: University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
Date: 2017
Language: eng
Number of pages: 18
Belongs to series: Boreal Environment Research
ISSN: 1239-6095
URI: http://hdl.handle.net/10138/174492
Abstract: To better understand the environmental factors and biological interactions affecting roach abundance and population structure in oligo-mesotrophic lakes, we explored roach population parameters in 24 small forest lakes in southern Finland. In those lakes, roach abundance was only little affected by the abiotic and biotic variables such as lake characteristics, water transparency, nutrient concentrations, pH or related variables, predation and competition. This was probably due to the generalist characteristics of the roach as it is adaptive to a wide variety of environments. Instead, the population structure and age-specific growth of the roach were strongly affected by various environmental variables. The growth rate was negatively related to water colour, calcium and nutrient concentration and roach abundance, and positively related to perch abundance and lake size. The growth patterns and relatively stable abundance showed flexibility in adaptation to different environmental conditions. Our results indicate that the ongoing environmental changes, recovery from acidification and brownification may notably affect the structure and production of roach populations, and may alter the role of the roach in lake ecosystems.
Subject: 1172 Environmental sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
ber22_119_136.pdf 561.1Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record