Cyclops strenuus

Cyclops strenuus (Fisher) is a common species of copepod in small water bodies in central Europe.^[2]

Cyclops strenuus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Copepoda
Order:	Cyclopoida
Family:	Cyclopidae
Genus:	Cyclops
Species:	C. strenuus
Binomial name
Cyclops strenuus Fischer, 1851[1]

The life-cycle of C. strenuus varies depending on habitat type and climate. In some habitat year round reproduction occurs. While in others one or two distinct generations exist with summer diapause.^[3][4] During diapause copepodid IV resting stages are produced that are largely inactive. These resting stages can survive in mud, to survive dry summer periods. During autumn, with a change in environmental conditions, resting stages become more active again and develop further into adult copepods.^[3]

Ecology

Cyclops strenuus occurs in temperate habitats. Normal activity occurs between 3 and 21 °C and temperatures above 26 °C are actively avoided.^[5]

It is also a common intermediate host of cestode parasites, such as Schistocephalus solidus. When infected with this parasite reproduction of female C. strenuus is significantly reduced ^[6]