Images made through a microscope. All subject types.
Even though I know that ciliates spend much of their time feeding, I have found it surprisingly difficult to get a decent video of the moment when their prey is captured. I have watched Lacrymaria many times and seen it shoot its motorized mouth right by appropriately sized food again and again without ever snaring it. So I felt lucky this spring in getting several captures on video. I also captured a scene where Lacrymaria appears to just curl up and die.
Hi Protos, I appreciate your compliment! And I think you are probably correct about Aspidisca. I thought it might be a Euplotes because it appeared to be "walking" on the detritus and I had read that Euplotes exhibit this "walking" type of movement. But I just watched some videos of Aspidisca and see that it also "walks" on stuff. I'm pretty much of a newbie at microscopy having just started doing it last fall, so I'm poor at identifying microorganisms. Thanks for correcting me and I will add an annotation to the YouTube video that indicates that the prey in this scene may well be Aspidisca.Protos wrote:Bill this is fantastic !
I have watched L. olor many times; haven't had a chance to see it feeding.
Instead of Euplotes I would put a coin of Aspidisca ;-)
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Great work, Bill! Yes, Aspidisca, without question (a Euplotid, so you were close!). Most spirotrotrichs are adapted for walking. It's what those thick ventral cirri are for.
It Came from the Pond (Blog): http://www.itcamefromthepond.com/
Bruce, thanks for helping out with the ID of the prey. Identification is not one of my strong suits!Bruce Taylor wrote:Great work, Bill! Yes, Aspidisca, without question (a Euplotid, so you were close!). Most spirotrotrichs are adapted for walking. It's what those thick ventral cirri are for.
By the way, do you know whether Lacrymaria stuns its prey, maybe with trichocysts? In the video, in meal #4, it looks like it hits or strikes the Aspidisca, backs off a bit, and then engulfs it.