|[Note Guidelines] Photographer's Note|
|Hi my Friends! This picture is dedicated to Radek [cicindela] as first prize for winner of my last quiz :-) Not very surprising beetle on photo is Tiger Beetle from Cicindelidae. Congratulations! :-)|
Look closer at it - insect is heavily damaged. It's dorsum, wings, probably also jaws are crushed. But it was still alive and very fast. I was chasing it good few minutes until took this photo. This is main difference between humen and insects - exoskeleton. Human with such great injuries would be dead for sure.
An exoskeleton is an external anatomical feature that supports and protects an animal's body, in contrast to the internal endoskeleton of, for example, a human. Whilst many many other invertebrate animals (such as shelled mollusks) have exoskeletons in the sense of external hard parts, the character is most associated with the arthropods (i.e. insects, spiders, myriapods and crustaceans). Exoskeletons contain rigid and resistant components that fulfil a set of functional roles including protection, excretion, sensing, support, feeding and (for terrestrial organisms) acting as a barrier against desiccation. Exoskeletons first appeared in the fossil record about 550 million years ago, and their evolution has been seen as critical as a driving role in the Cambrian explosion of animals that took place subsequent to this time.
A typical arthropod exoskeleton is a multi-layered structure with four functional regions: epicuticle, procuticle, epidermis and basement membrane. Of these, the epicuticle is a multi-layered external barrier that, especially in terrestrial arthropods, acts as a barrier against dessiccation. The strength of the exoskeleton is provided by the underlying procuticle, which is in turn secreted by the epidermis. Arthropod cuticle is a biological composite material, consisting of two main portions: fibrous chains of alpha-chitin within a matrix of silk-like and globular proteins, of which the most well-known is the rubbery protein called resilin. The relative abundance of these two main components varies from approximately 50/50 to 70/30 protein/chitin, with softer parts of the exoskeleton having a higher proportion of chitin. Although the cuticle is relatively soft when first secreted, it soon hardens in a poorly-understood process that involves dehydration and/or tanning mediated by hydrophobic chemicals called phenolics. Different types of interaction between the proteins and chitin leads to varying mechanical properties of the exoskeleton.
In addition to the chitino-proteinaceous composite of the cuticle, many crustaceans, some myriapods and the extinct trilobites further impregnate the cuticle with mineral salts, above all calcium carbonate, which can make up up to 40% of the cuticle. This can lead to great mechanical strength.
SelenE, haraprasan, marhowie, cataclysta, cicindela, Silke has marked this note useful
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- [2007-09-26 23:22]
Good morning Greg,
Focus, sharpness, details and composition are very nice. TFS
Have a nice day,
A battle-worn warrior I see here..but still fighting the good fight.
Excellent capture, sharp details. Cool looking beetle, even with the battle scars :)
And your notes are great as always,
Very well done.
Podziwiam wszystkich ktorzy robia zdjecia trzyszczom. Nie dosc ze ciekawy egzemplarz (kancer :-)to jeszcze ten szybki zwierzak jest swietnie pokazany w naturalnym otoczeniu przy swietnej ostrosci. Radek na 100% ucieszy sie z dedykacji :-)
Bardzo mi sie podoba
Piekna nagroda za odgadniecie obiektu z poprzedniej prezentacji. I druga juz trzyszczowa dedykacja jaka Ci zawdzieczam :) Bardzo wielkie DZIEKUJE!!! :>
Trudno ocenic co sie temu samcowi stac moglo, ale wyglada jakby zdezyl sie z czolgiem ;)
Bardzo ostre i szczegolowe zdjecie, i mimo "kancery" bardzo mi sie ten trzyszcz piaskowy (Cicindela hybrida) podoba :>
Raz jeszcze dzieki!
- [2007-09-27 14:20]
The details and colours are so sharp on this creature, and what a story!
Nice clear shot of this maimed Tiger Beetle Greg. Not every creature on TN needs to be in perfect condition and that certainly isn't the realty of nature.
(I should know ... I'm a hideously deformed mutant myself;)
I wonder what sort of creature did this.
Makes for an interesting shot and note anyway.
A nice capture of this tiger beetle. And a nice presentation for Radomir. Nice composition and detailed focus. Thanks a lot for sharing.