Search found 411 matches

by janvangastel
Sun Oct 18, 2020 8:52 pm
Forum: Pictures and Videos
Topic: Leukocyte crawling in blood
Replies: 10
Views: 212

Re: Leukocyte crawling in blood

Beautifull!!
by janvangastel
Sat Oct 17, 2020 8:04 am
Forum: Pictures and Videos
Topic: Frontonia atra
Replies: 16
Views: 323

Re: Frontonia atra

I use this key http://www.wfoissner.at/data_prot/Foissner_Berger_1996_375-482large.pdf and this one https://apps.who.int/iris/bitstream/handle/10665/40066/16583_eng.pdf;sequence=1 , both downloadable pdf's. And the work of Kahl. Bruce Taylor provided the links to downloadable pdf's of his books some...
by janvangastel
Fri Oct 16, 2020 6:45 am
Forum: Pictures and Videos
Topic: Frontonia atra
Replies: 16
Views: 323

Re: Frontonia atra

Yes, I used oblique illumination.
@75RR: I made this small pond to attract birds for bird photography. Works fine. And yes, from time to time I see a frog there. I didn't see dragonflies.
by janvangastel
Thu Oct 15, 2020 4:49 pm
Forum: Pictures and Videos
Topic: Paramecium sp. - DF+Pol
Replies: 5
Views: 95

Re: Paramecium sp. - DF+Pol

Beautifull and sparkling!
by janvangastel
Thu Oct 15, 2020 7:16 am
Forum: Pictures and Videos
Topic: Frontonia atra
Replies: 16
Views: 323

Re: Frontonia atra

Yes, it looks like some kind of dance. There were four or five present in the sample and they all made about the same kind of movement. I have seen that in more species.
by janvangastel
Wed Oct 14, 2020 1:40 pm
Forum: Pictures and Videos
Topic: Frontonia atra
Replies: 16
Views: 323

Re: Frontonia atra

No, but her is one. Its a prefabricated plastic pond. Its really small, about 1.3x1 meter and about 50 cm deep. I made about 4 years ago and never cleaned it. Never added new water. Sometimes it almost dries out and sometimes it splills over.

vijver.jpg
vijver.jpg (322.05 KiB) Viewed 312 times
by janvangastel
Wed Oct 14, 2020 11:26 am
Forum: Pictures and Videos
Topic: Frontonia atra
Replies: 16
Views: 323

Frontonia atra

I found this large ciliate in my small pond. Given the shape, the dark color, the place of the CV and the macronucleus and the trichocysts I think it is Frantonia atra. Lenght of this ciliate is around 270 microns.

by janvangastel
Tue Oct 13, 2020 3:31 pm
Forum: Pictures and Videos
Topic: Homalozoon vermiculare hunting
Replies: 7
Views: 141

Re: Homalozoon vermiculare hunting

Very nice video. I never saw this species before.
by janvangastel
Sun Oct 11, 2020 4:02 pm
Forum: Pictures and Videos
Topic: Filose amoeba
Replies: 8
Views: 136

Re: Filose amoeba

Very nice Wes.
by janvangastel
Sun Oct 11, 2020 4:00 pm
Forum: Pictures and Videos
Topic: Peranema revisited (video)
Replies: 12
Views: 259

Re: Peranema revisited (video)

Nice video's!
by janvangastel
Sun Oct 11, 2020 10:29 am
Forum: Pictures and Videos
Topic: Unknown but really cool...
Replies: 17
Views: 396

Re: Unknown but really cool...

Nice creature. I see them often in my samples. I think it's a copepod nauplius.
by janvangastel
Fri Oct 09, 2020 6:26 am
Forum: Pictures and Videos
Topic: 5 closteria
Replies: 4
Views: 109

Re: 5 closteria

Contrasty, colorfull and sharp. Very nice photographs.
by janvangastel
Wed Oct 07, 2020 6:08 am
Forum: My microscope
Topic: A thought about size
Replies: 18
Views: 536

Re: A thought about size

I like 75rr's notion of just getting used to mm and microns. Yes, A kind of 'notion'or 'feeling' will come with time, or at least we think it will, because we get used to the terminology and develop some king of 'feeling' about it. In astronomy its the contrary: trying to comprehend how large thing...
by janvangastel
Tue Oct 06, 2020 6:42 am
Forum: Identification help
Topic: Chaetonotus ?
Replies: 3
Views: 109

Re: Chaetonotus ?

I am not sure but it is certainly possible.
by janvangastel
Mon Oct 05, 2020 6:51 am
Forum: Pictures and Videos
Topic: Water mite
Replies: 12
Views: 1331

Re: Water mite

Beautifull!!
by janvangastel
Sat Oct 03, 2020 5:34 pm
Forum: My microscope
Topic: A thought about size
Replies: 18
Views: 536

Re: A thought about size

I once wrote an article about that for a Dutch magazine about astronomy. Very interesting topic.

Jan.
by janvangastel
Wed Sep 30, 2020 8:24 pm
Forum: Pictures and Videos
Topic: Very Small Ciliates
Replies: 2
Views: 97

Re: Very Small Ciliates

Hi Don, I saw your video and to me these small creatures look more like flagellates. Sometimes a flagella is visible.
by janvangastel
Wed Sep 30, 2020 8:21 pm
Forum: Pictures and Videos
Topic: Operculria Peritrich
Replies: 3
Views: 91

Re: Operculria Peritrich

Nice photographs Don. I never saw this species before. How did you find out what is is?
by janvangastel
Wed Sep 30, 2020 3:02 pm
Forum: Pictures and Videos
Topic: Litonotus duplostriatus
Replies: 4
Views: 165

Re: Litonotus duplostriatus

Thanks Bruce. There are always more possibilities then I am aware of when ID-ing. Makes it difficult, but also interesting.
by janvangastel
Wed Sep 30, 2020 1:54 pm
Forum: Identification help
Topic: Need Help to ID
Replies: 8
Views: 283

Re: Need Help to ID

I will give it a try. The video has not enough information - at least not for me - to ID to the species level. 1. Rotifer 2. Algae, looks like a volvox species, but I am not sure. 3. Looks like an euglenas species. 4. A flatworm. 5 and 6. Cyclops 7. Ciliate: Paramecium. Not clear which species. 8. T...
by janvangastel
Wed Sep 30, 2020 11:12 am
Forum: Pictures and Videos
Topic: Litonotus duplostriatus
Replies: 4
Views: 165

Litonotus duplostriatus

My North Sea sample is full of Pleurostomatidae at the moment. When I started observing this sample I only found very few, but now, after about ten days, its the most abundant ciliate of which I see at least 15 in every slide I observe. two days ago I found this nice one. I think it is Litonotus ple...
by janvangastel
Tue Sep 29, 2020 7:10 am
Forum: Introduce yourself
Topic: Retired and loving it!
Replies: 10
Views: 403

Re: Retired and loving it!

Microscopy and astronomy have always interested me. Astronomy is great but you are at Mother Nature mercy. Not so with microscopy. I retired exactly ten years ago and didn't even miss my work for one minute. I am also an amateur astronomer (and a mountainbiker and a bird watcher/photographer). What...
by janvangastel
Tue Sep 29, 2020 7:04 am
Forum: Pictures and Videos
Topic: The Leaf Culture
Replies: 2
Views: 104

Re: The Leaf Culture

Interesting project Don.
by janvangastel
Sat Sep 26, 2020 6:05 pm
Forum: Pictures and Videos
Topic: Diatom 640X Oblique Illumination
Replies: 41
Views: 5079

Re: Diatom 640X Oblique Illumination

Very nice technique. Alas, I don't have photoshop. Tried with PaintshopPro, but didn't work.

EDIT: maybe I found it.....will try tomorrow.
by janvangastel
Sat Sep 26, 2020 4:29 pm
Forum: Pictures and Videos
Topic: Rotifer
Replies: 7
Views: 208

Re: Rotifer

Beautifull!!
by janvangastel
Sat Sep 26, 2020 3:39 pm
Forum: Pictures and Videos
Topic: Two Pleurostomatidae from the North Sea
Replies: 0
Views: 80

Two Pleurostomatidae from the North Sea

These two look like Lotonotus, but there are some differences from the Litonotus species I have already seen. I could not find them in the keys I use to identify ciliates. They are relatively small: 50-55 microns. The first one (first video) isn't very stretchy (or does not show it). The second one ...
by janvangastel
Fri Sep 25, 2020 6:22 am
Forum: Pictures and Videos
Topic: Unknown ciliate (?) from the North Sea
Replies: 3
Views: 144

Re: Unknown ciliate (?) from the North Sea

Thanks again Bruce.
by janvangastel
Fri Sep 25, 2020 6:15 am
Forum: Pictures and Videos
Topic: Comparative sizes of bacteria and ciliate
Replies: 5
Views: 198

Re: Comparative sizes of bacteria and ciliate

I observed spirochaetes some time ago. They can be as large as 500 microns (the ones I saw were 3-5 microns) . It is also possible that the bacteriae in your video are actually a chain of smaller bacteriae.
by janvangastel
Thu Sep 24, 2020 6:11 pm
Forum: Pictures and Videos
Topic: Unknown ciliate (?) from the North Sea
Replies: 3
Views: 144

Unknown ciliate (?) from the North Sea

I found this very nice ciliate (I think it is a ciliate, but I am not sure about that) in my North Sea sample. No clue what (family, genus, species) it is. Never saw something that looks like it in my fresh water samples. Length is about 220 microns.

by janvangastel
Thu Sep 24, 2020 10:40 am
Forum: Pictures and Videos
Topic: Another Euplotes from the North Sea
Replies: 2
Views: 116

Another Euplotes from the North Sea

I found another Euplotes in my North Sea sample. With a 40 micron length it is smaller then the former one (57 microns). This one also has algae in its body, but it looks like at least some are - partly - digested. Between 40 en 44 seconds an algea is being swallowed.