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Hyalodiscus rubicundus feeding on an algae
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Ferry



Joined: 18 Nov 2009
Posts: 301
Location: Netherlands

PostPosted: Fri Nov 21, 2014 3:20 pm    Post subject: Hyalodiscus rubicundus feeding on an algae Reply with quote

The next sequence shows how a cell of Hyalotheka dissilens is attacked by Hyalodiscus rubicundus.


Hyalodiscus rubicundus is a vampyrellid amoeboid which opens cells of algae and sucks their content, hence its name.


Hyalodiscus rubicundus penetrates the mucous layer around the algae.


The amoeba reaches the cell membrane of the algae and starts to open a cell. This process lasts for about 10 minutes.


Suddenly, within seconds, a large part of the cell content moves into the amoeba. This goes fast.


The next 15 minutes Hyalodiscus pulls all the remaining pieces of the chloroplast in its cytoplasm, piece by piece.






The job is done.


Hyalodiscus moves to the neighbouring cell and the process starts again.


16 minutes later the cell is open.


When Hyalodiscus is filled with food, it builds a digestive cyst.


After some days the amoeba (left, orange spot) leaves its cyst, leaving indigestible residue behind.


Holes made by Hyalodiscus in cell walls of Hyalotheka dissilens.
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Last edited by Ferry on Fri Nov 21, 2014 3:27 pm; edited 1 time in total
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Pau
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Joined: 20 Jan 2010
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PostPosted: Fri Nov 21, 2014 3:26 pm    Post subject: Reply with quote

Ferry, what an interesting and well photographed sequence! Applause
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pwnell



Joined: 18 Dec 2009
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PostPosted: Fri Nov 21, 2014 4:39 pm    Post subject: Reply with quote

Incredibly informative and well explained - thanks!
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GemBro



Joined: 20 Aug 2014
Posts: 261
Location: Surrey [UK]

PostPosted: Fri Nov 21, 2014 8:02 pm    Post subject: Reply with quote

Excellent shots Ferry ... brilliant sequence of events ... stills (in story board fashion) are sometimes better than video ...

I haven't ventured into Micro Photography but I could sit and watch these all day long ... very informative ...
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Jacek



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PostPosted: Sat Nov 22, 2014 12:40 am    Post subject: Reply with quote

wow ! Shocked
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Chris S.
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Joined: 05 Apr 2009
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PostPosted: Sat Nov 22, 2014 1:08 am    Post subject: Reply with quote

Wow, Ferry! A story well told, very interesting and illustrative. A tour de force.

--Chris
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arturoag75



Joined: 05 Feb 2010
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PostPosted: Sat Nov 22, 2014 2:07 am    Post subject: Reply with quote

Fantastic explanation of this incredible sequence Shocked Wink
Arturo
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vasselle



Joined: 05 Jan 2014
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PostPosted: Sat Nov 22, 2014 3:45 am    Post subject: Reply with quote

Bonjour
Bravo cette observation qui est super intéressent car pour moi c'est la première fois que je vois ça.
Merci pour la partage.
Cordialement seb
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piermicro



Joined: 10 Mar 2014
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PostPosted: Sat Nov 22, 2014 7:42 am    Post subject: Reply with quote

Very well sequence. Very interesting.
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carlos.uruguay



Joined: 23 Feb 2012
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PostPosted: Sat Nov 22, 2014 7:50 am    Post subject: Reply with quote

Excellent, thanks for sharing it!
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JH



Joined: 09 Mar 2013
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Location: Vallentuna, Stockholm, Sweden

PostPosted: Sat Nov 22, 2014 5:15 pm    Post subject: Reply with quote

Hi Ferry
Interesting, informative and very nice photos!
Is it the same preparate and amoeba that you have in the thirteenth picture "After some days the amoeba..." as you have in the first pictures? If it is, how do you keep the preparate fresch for such a long time.

Regards Jörgen
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Olympusman



Joined: 15 Jan 2012
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PostPosted: Sun Nov 23, 2014 8:44 am    Post subject: Sequence Reply with quote

Ferry,
Bravo! Amazing sequnce.
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Charles Krebs



Joined: 01 Aug 2006
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PostPosted: Tue Nov 25, 2014 2:42 pm    Post subject: Reply with quote

Ferry,

This is really a wonderful sequence of images. Glad you posted it!
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Ferry



Joined: 18 Nov 2009
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PostPosted: Tue Nov 25, 2014 4:11 pm    Post subject: Reply with quote

Thank you all!

@ Jörgen,
Look at www.arcella.nl/humidity-chambers where I explain how to keep wet mounts fresh and wet for many days. Essentially every mount or slide is a small culture and a lot of 'new' species come out of the debris, or cysts. It is the way I usually work, especially for observing small species.
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JH



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PostPosted: Thu Nov 27, 2014 2:13 pm    Post subject: Reply with quote

Thanks Ferry
Your Website is very interesting and informative.
Regards Jörgen
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