Methods for the activation of the resting eggs of Daphnia
Article first published online: 29 MAY 2006
Volume 17, Issue 2, pages 373–379, April 1987
How to Cite
SCHWARTZ, S. S. and HEBERT, P. D. N. (1987), Methods for the activation of the resting eggs of Daphnia. Freshwater Biology, 17: 373–379. doi: 10.1111/j.1365-2427.1987.tb01057.x
- Issue published online: 29 MAY 2006
- Article first published online: 29 MAY 2006
- Manuscript accepted 30 June 1986
SUMMARY. 1. The conditions required to initiate development of resting eggs of thirty-six clones of Daphnia representing seven species were investigated.
2. The temperature of both dark incubation and subsequent light treatment are shown to affect hatch success. By varying these parameters the majority of resting eggs from each test clone were stimulated to develop. Arctic clones required a low hatching temperature (7°C), whereas clones from warmer climates hatched best at 14–21°C.
3. Variation in hatching cues existed between conspecific individuals from different collection sites. These differences suggest that research determining macro- and microgeographic patterns in hatching phenology would be fruitful.