Open AccessInfluence of environmental factors onto reproductive characteristics of Daphnia galeata from Lake Baikal
Author(s) -
S. I. Pitul’ko,
AUTHOR_ID
Publication year - 2021
Publication title -
limnology and freshwater biology
Language(s) - English
Resource type - Journals
ISSN - 2658-3518
DOI - 10.31951/2658-3518-2021-a-5-1175
Subject(s) - daphnia galeata , fecundity , biology , daphnia , brood , predator , cladocera , crustacean , fertility , zoology , ecology , predation , branchiopoda , population , demography , sociology
. The influence of various factors onto the reproductive characteristics of the cladoceran Daphnia galeata Sars, 1863 Lake Baikal was studied. With an increase in the concentration of available feed, the size of the body, average fertility, the size of the brood and the proportion of egg-bearing females increase. At high temperatures, significantly greater fecundity and the proportion of egg-bearing females were noted; other features did not change significantly with temperature increase. Under the conditions of strong turbulence, the fertility and the proportion of egg-bearing females are lower than under the conditions of low turbulence. The presence of a predator with an increase in the concentration of feed and temperature results in the decrease in the size of crustaceans and in the increase of the proportion of egg-bearing females.