The Macroscopic Bottom Fauna of Lac la Ronge, Saskatchewan

Publisher Website
Google Scholar
Abstract
In the summers 1948 to 1953 (except 1951) 796 quantitative dredge samples were taken in the main lake and 172 in Hunter Bay. The 1948 and 1949 populations of the main lake were significantly higher than the 1952 and 1953 populations. No significant yearly difference occurred in Hunter Bay. The amphipods (mainly Pontoporeia affinis) predominated in the oligotrophic Hunter Bay which had 2192 organisms per square metre and dry weight of 6.4 lb per acre. The chironomid larvae (mainly Chironomus anthracinus) predominated in the mesotrophic main lake which had 742 organisms per square metre (7.9 lb/acre, 8.8 kg/ha). The depth distribution of the main groups are given. Correlation of depth with numbers was shown. Numbers in the main lake showed spring and fall maxima, with a summer minimum. The yearly variation was greatest in the chironomid larvae. The ooze type in the upper littoral had the greatest number of organisms. An annotated species list of some groups is given.

This publication has 0 references indexed in Scilit: