Fish louse, Argulus foliaceus
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Fish louse, Argulus foliaceus
Microscope: Wild M8
Surface illumination
Sample from garden pond
30 Aug 2007
Length ~5 mm
Top and underside views
Microscope: Zeiss Standard 16
Ocular: Zeiss Kpl W 10/18
Objective Zeiss plan 1.6/0.03 - 5/0.1
Diffuse transmitted light
Sample from garden pond
30-Aug-2007
I guess the upper image suggests why it is called foliaceus. The underside view shows clearly the two suckers that the louse uses to attach itself to fish. The upper view shows this is a female with eggs. The lower image of the second set shows the compound eyes fairly well.
This was a devil to get acceptable illumination... just the wrong size specimen!
I spotted the beast swimming in the garden pond tonight after dark - I could see its shadow in the garden light.
Graham
Though we lean upon the same balustrade, the colours of the mountain are different.
Though we lean upon the same balustrade, the colours of the mountain are different.
Great contrast
Hi Graham,
Great contrast!
What is surface illumination?
Great contrast!
What is surface illumination?
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- Posts: 1040
- Joined: Thu Aug 03, 2006 10:54 am
- Location: Horsham, W. Sussex, UK
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