Amoeba (arcella?) 'walking'

[Aenima]

I love the way amoebas move, and especially when they appear to get up and walk


video sped up to 4x speed.


http://www.youtube.com/watch?v=HqR_qeFz ... e=youtu.be

[mnmyco]

That is awesome.

[Aenima]

That is awesome.

mnmyco thanks i just uploaded another vid of the same kind of amoeba but using a phase contrast objective (mismatched condenser but still works okay) - actually, since getting hold of the parts to make phase contrast i've been searching out amoebas and recording various species, quite a neat invention for otherwise transparent subjects, and still a novelty for me

thanks for looking

[75RR]

Nice idea to speed up the movement. Works very well!

[rnabholz]

Very cool.

Agree with 75 - great idea to speed it up.

[Hobbyst46]

Very nice demonstration. Especially the BF video.

[Aenima]

cheers fellas - yeah, i did find a lot of the amoebas were rather slow moving, although i did find one that blew me away - it wasn't just fast moving, it also had strange thin and numerous pseudo-pods that seemed to be shooting outwards [a bit] like mini grappling hooks - at least that was how i imagined it.
Hard to explain, but it seemed to shoot out new shoots instead of moving the existing ones around.. and quite quickly too.

Would really like to get an ID on it if anyone can help?



EDIT; Ps the vid is not sped up like the others, it is at original speed - edit; objective was a 40x phase from ebay - not as good as the 25x apo but still pretty usable

[75RR]

Most interesting. Amoeba on steroids!

Will guesstimate: Rhogostoma sp.

[cuxlander]

Hi Aenima,
the first one is a Centropyxis most probably aculeata.
Second one ?? I wonder if phase contrast is the right method for this kind of object?
The last one??
Cheers,
Hans

[Aenima]

Hi Aenima,
the first one is a Centropyxis most probably aculeata.

thanks i looked it up and it seems bang-on

Second one ?? I wonder if phase contrast is the right method for this kind of object?

yeah it's very unattractive, especially the murky looking shell (test?) but i sometimes like the high contrast on the pseudopods - particularly if they're invisible using regular brightfield - although in the case of the second one i was quite happy with the brightfield footage already captured and just thought i'd give phase contrast a try, mostly because it's rather a novelty at the moment

The last one??

yeah no idea i tried google on 75RRs suggestion but haven't managed to find any similar looking images to compare..

appreciate the ideas and suggestions, thanks

[MicroBob]

Thank you for showing, Aenima!
this shows how vision and recognition depend on speed.
We probably don't recognize a lot of things because they happen either too fast or too slow.

Bob

[75RR]

i tried google on 75RRs suggestion but haven't managed to find any similar looking images to compare..

On further research I would have to agree that Rhogostoma sp. is most probably a miss-identification

Now putting forward Arachnula, with I hope better results.

https://www.youtube.com/watch?v=OIlL8uYW5qs

[Aenima]

75RR wow - thats really weird, i actually mentioned spiderman in my youtube description accompanying the upload, and now i find your link goes to a similarly described amoeba - and a very close comparison too. Thank you 75RR, a big help


microbob - indeed very true - timelapse nature footage being a good example


---------------------------------------------- *and many other things, like, on a completely different note, quite a lot of social trends and patterns seem to be unnoticed because they occur slowly, often only recognized in hindsight. I call it the boiling frog syndrome (as do many others) -a kind of 'fable' that a frog can be happily cooked if you put it in warm water initially and increase heat slowly...

[ImperatorRex]

Wonderful videos!

[Aenima]

Wonderful videos!

thanks man