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Dartmoor Tick Watch
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"Now showing ....."
>>> Tick - The Movie! <<<
In Windows Media Player .....
To repeat play a movie, click the repeat icon under the double yellow arrows.
To see it Full Screen, click the icon under the double white arrows.
To return to normal viewing screen, click the Esc key on your keyboard:
Movie selection | File size | Playing time |
Download time on BT Broadband* |
1. Engorged tick righting itself - a useful trick if upended! | 0.9 MB | 9 secs | 20 secs |
2. A tick walking in a Petri dish | 0.6 MB | 9 secs | 10 secs |
3. "Tangle of ticks" - 47 live ticks together in one place ** | 1.0 MB | 16 secs | 13 secs |
4. "Tangle of ticks - II" - 72 live ticks together in one place *** | 0.6 MB | 8 secs |
15 secs |
5. Seven pairs of mating sheep ticks - static arrangement | 0.3 MB | 8 secs |
20 secs |
6.
Sheep tick nymph on finger, showing the
rate of movement ![]() |
1.4 MB | 5 secs | 9 secs |
7.
Nymph gut contents - I - x400
with zoom
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2.9 MB | 11 secs | 13 secs |
8.
Nymph gut contents - II -
x1,000 with zoom
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2.9 MB | 10 secs | 6 secs |
9.
Nymph gut contents - III -
x1,000 with zoom
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1.8 MB | 7 secs | 5 secs |
10.
Nymph gut contents - IV -
x1,000 with zoom
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3.6 MB | 15 secs | 8 secs |
11.
Nymph gut contents - V -
x1,000 with zoom
![]() Very small frenetically wriggling entities. The cells are salivary gland tissue? Scales: Inner ring diameter = 13 micrometres - this is a correction (22 Jun 2009); outer double ring thickness = 1 micrometre. |
4.0 MB | 14 secs | 11 secs |
12.
Nymph gut contents
- VI -
x1,000 with zoom
![]() A long "wriggly" - a chain of rod-like bacteria? |
3.8 MB | 14 secs | 10 secs |
![]() 13. Nymph gut contents - VII - x1,000 with zoom ![]() Definite long, doubled up spiralling microbe - spirochaete? The bacteria are in a depth of saline and come in and out of focus in the microscope. This was one of four seen - at first I ignored them as something odd - they were partly doubled-up which may be a result of the non-physiological nature of the saline - missing electrolytes and incorrect pH (acidity / alkalinity)? Scale: the outer double ring is 21 micrometres in diameter: outer double ring thickness = 1 micrometre. |
1.9 MB | 15 secs | 29 secs |
![]() Starts looking S.E. along main track past the circle, with circle at left, panning left and ending looking along/around the circle. ![]() |
3.8 MB | 22 secs | 20 secs |
![]()
15. Yarner Horse Circle Leaf Litter |
2 MB | 18 secs | 8 secs |
![]() Starts looking N.W. along main track past Horse Circle. Shows rucksack and mini-scythe (for cutting bracken in the circle, with permission) for scale re. the height that the undergrowth has now reached and the reason for abandoning this sampling sweep. ![]() |
3 MB | 32 secs | 10 secs |
![]() Showing another hazard of blanket dragging on Dartmoor - cows! ![]() |
3 MB | 11 secs | 10 secs |
![]() Similar to the previous movie but filmed on the move, backwards! ![]() |
2 MB | 8 secs | 7 secs |
![]() Showing how desolate this area is. It is not necessarily very high, at typically 300 metres (1,000 feet), but it is very exposed and wind-swept - listen to the sound track, and this was a non-windy day! ![]() |
3.9 MB | 44 secs | 7 secs |
![]() Showing the stubby nature of the bracken area beside the plantation compared to the high bracken in the shelter of Yarner Wood (movies 14-16 ). This habitat contiguous with Ringmoor Down (movie 19). ![]() |
1.9 MB | 16 secs | 6 secs |
* Depends on internet use at the time
** A 'still' photograph of the 47 ticks, cleaned-up, can be seen
here and on the
Photos page.
*** A 'still' photograph of the 72 ticks, cleaned-up, can be seen
here
and on the
Photos page.
These (47 & 72 ticks) are all hedgehog ticks, removed from two sheepdogs -
that is correct!
Incidental photos taken while looking at 1st nymph under the Leitz Nomarski microscope
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Low power
Nomarski image of
the decapitated nymph-showing manually extruded gut contents, at top-left.
Magnification: x250 plus zoom on the camera. The tick body in this image is
probably about 1.4 mm long. The on-screen image on a 800x600 display is 50
mm, therefore the magnification is about x35. |
Still image of gut content
entities under oil immersion (x1,000 + zoom). This can be seen more
dramatically in the gut content movies above. The moving microbes are in the
1 to 5 micrometer size range.
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Nymph foot, showing the terminal claws - highly magnified. |
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