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No way to run


No way to run
Photo Information
Copyright: des hoi (deshoi) Silver Note Writer [C: 7 W: 2 N: 65] (322)
Genre: Animals
Medium: Color
Date Taken: 2009-04-18
Categories: Insects
Camera: Pentax K20 d, Pentax F 100/2.8 macro
Exposure: f/8, 1/125 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-11-17 4:37
Viewed: 3398
Points: 14
[Note Guidelines] Photographer's Note
Hi again TN members, this is the photograph that It show you how does the great black wasp attack the spider.
I was lucky that this black wasp was clamming a spider came out from noway and landed in front of me, at first, I have no idea what was the light brown insect. It was quick and I only have second to on my camera to take this shot,"the only shot" and gone noway.

The wasps tended to be selective, mainly capturing medium sized spiders. With the large black hunting wasp (Salius monachus) particularly favouring P. antipodiana as prey. Young spiders were generally safe from attack as their tunnels were too small for most wasps to enter. Spider mortality rates due to wasp attack varied from 12-30%. Wasp mortality rates directly attributable to spider bite was as high as 11%. Spider survival was found to be attributable to six tactics of behaviour of which the most significant was the spider failing to respond to web stimuli. The hypothesis is advanced that the main ecological impact of the wasp is to reduce intraspecific competition among spiders. The long term implication of some spiders surviving to breed for six or more years is also considered.
the wasps were responsible for the declines in spider numbers could be supported by the following facts:
(a) numbers of paralysed spiders were seen being dragged off by wasps;
(b) no other predators were seen to be capturing or feeding on the spiders;
(c) other possible factors such as summer drought dehydration and/or starvation could be ruled out due to lack of symptoms. In both of these conditions the abdomen of the spider becomes wrinkled and shrunken, so it would have been an easy matter to identify them as a cause of ill health in the spiders.

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To Nephrotome2: No way to rundeshoi 2 11-20 07:42
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Critiques [Translate]

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5038 W: 260 N: 15594] (50626)
  • [2009-11-17 6:02]

Hello Des,
This macro provides the answer to the missing legs mystery in you previous spider posting.
It seems that this Hunting Wasp species amputates the legs prior to taking the spider body to its tunnel where its grub needs to be fed. Some species do this by laying the egg in the victim body for the larva to feed on it from indside.
Fine clear macro taken from a great POV.
Thanks for this very interesting and informative posting!
Best regards,
Ivan

  • Great 
  • Mello Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 140 W: 34 N: 480] (2419)
  • [2009-11-17 6:13]

I agree with you Des, "no way" to see and not to say anything. I liked so much this composition and your great POV, image quality and title. TFS.
Francisco

hello Des
very good sharpness composition '
great details and beautiful colours
great shot
greeting lou

Hi Des,

Very good and dramatic picture, with a spectacular close-up and a good focused. Seems me that the background has been perfect. Good work MF!

An advice: Places the "copyright/name" in a place where it does not affect the photographic plane.

TFS

Jesús

Hi Des,
Excellent macro shot. Technically perfect and with brilliant colors.
Where are the legs of the spider? Are they folded under, or are they truncated after the 1st segment. I don't quite understand what I see. Could you please explain if you know?
TFS
JM

  • Great 
  • NinaM Gold Star Critiquer [C: 773 W: 3 N: 1157] (4077)
  • [2009-11-18 5:37]

That is what I call a macro shot and action shot at the same time, which we don't see often! Amazing, I didn't know ants could kill spiders, wow! There is so much details, a nice dof - usually so shallow in macro - wonderful light. Thank you Des, this is very interesting and beautiful at once!

Francine

  • Great 
  • nagraj Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1618 W: 106 N: 3208] (15166)
  • [2009-11-18 7:07]

Hi,
Very interesting natural history image, fine closeup and that too only one image. I should appreciate your reflex action for this good work. tfs.
nagraj.v

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