Eucyclops serrulatus, with a furca which is about 4–6 times as long as wide, is the most common copepod in Norway. It is a very tolerant species and is one of the first to colonize new established waterbodies.
Eucyclops serrulatus has a body which is moderately slender and with a furca which is about 4–6 times as long as wide. Populations sampled in early spring or late autumn may have a furca that is somewhat longer. The outer margins of each branch have a dense row of small teeth. The last joint of the antennae has a smooth surface. The colour is more or less dark olivaceous with a greenish tinge.
Female: Length 0.8–1.5 mm
Male: Length 0.6–0.8 mm
Ecology and distribution
E. serrulatus is the most common littoral copepod in Norway and occurs in 43 % of the water bodies. It is distributed in all parts of Norway, from sea level and up to 1486 m a.s.l. It occurs with its highest frequency in localities below 300 and above 1000 m a.s.l. and is common in micro- and macrophyte vegetation in both small pools and in the littoral zone of big lakes. The species has a wide tolerance towards pH and found in lakes having pH varying between 4.0 and 9.9. It is also tolerant towards electrolytes and found in brackish water (0.4–957 mS/m).
|Vitenskapelig navn||< 4,5||4,5 - 4,9||5,0 - 5,4||5,5 - 5,9||6,0 - 6,4||6,5 - 7,0||7,0 - 7,4||> 7,5|
|Vitenskapelig navn||< 1,0||1,0 - 1,4||1,5 - 1,9||2,0 - 2,9||3,0 - 3,9||4,0 - 4,9||5,0 - 6,9||7,0 - 9,9||> 10,0|
|Vitenskapelig navn||< 0,01||0,01 - 0,09||0,1 - 0,9||1,0 - 9,9||10,0 - 99||100 - 999||> 1000|
|Vitenskapelig navn||< 100||100-299||300-499||500-699||700-999||>1000|