Here is a selection of some of our videos. Please feel free to use them for teaching purpose.
- The video files are not always optimized for web streaming and can be rather large! Please be patient while loading.
- If you have problems with Quicktime movies (mov files) please download the latest Quicktime version and try again.
- If you want to use the movies for teaching, you will be able to download all movies in a password protected zip-container. Please contact Michael Nickel for the login and password
- For 3D movies you will usually need red/green anaglyph glasses. Those movies are marked by the following sign:
Copyright for all videos by porifera.net lab, Michael Nickel & Co-authors.
A time lapse series of contractions in a fused twin pair of clonal individuals of Tethya wilhelma (Demospongiae). This movie was taken approximately two weeks after the specimens were brought together to fuse. Mind the paradoxon concerning regulation of the visible morphological changes: while bothe specimens retain their own contraction rhythm, the expansion and retraction of the body filament is perfectly synchronized in both specimens. How to explain this? Some details of this questions are addressed in my publication Nickel, M. (2004), "Kinetics and rhythm of body contractions in the sponge Tethya wilhelma (Porifera: Demospongiae)", Journal of Experimental Biology, 207: 4515-24.
Copyright by M. Nickel; no unauthorised copying, distribution or broadcasting. Feel free to use it for teaching purpose.