Untersuchungen über den einfluß äußerer saktoren auf die dauer der embryonalentwicklung und den Häutungsrhythmus von Cyclops vicinus
- PMID: 28311153
- DOI: 10.1007/BF00345858
Untersuchungen über den einfluß äußerer saktoren auf die dauer der embryonalentwicklung und den Häutungsrhythmus von Cyclops vicinus
Abstract
1. Methods are described for continuous laboratory cultivation of the pelagic freshwater copepod Cyclops vicinus. 2. The embryonic development is temperature dependent in a manner typical of cyclopids. Isolated egg-sacs show a slight tendency to accelerated development. 3. Increasing day length, increasing light intensity and decreasing temperature delay the process of molting throughout the whole development, in both sexes. In the copepodid-phase development is faster in males than in females. 4. Molting activity shows a maximum in the middle of the light phase and a second maximum at the beginning of the dark phase.