Information needed regard T eyes field of spectrum

[Rich.Harrington]

Hi all, can anyone tell me if T's have the ability to see into the infrared spectrum or not? I know that some types of jumping spider can although I also know T's generally have very poor vision. However I no expert on anatomy of a spider yet so do not know and so far have been unable to find anything online. The spider in question is a G.rosea.

I'm asking as I have been converting my webcam to be able to pick up infrared light, and have also built an IR emmiting light with the intention of fixing both into the rosea's enclosure so I can cover the front and still observe it in a more natural enviroment.

[Chris Wheeler (Gigus)]

Jumping spiders can see Ultra violet light.

[Colin D Wilson]

Hi Rich,
I take it that you will be changing the charge coupled device (CCD).
I will tell you what i know from experience...as i have tried it on an old camera after my ex wifes new fiance gave me the idea.

Your scenario will work, and give reasonable imaging capabilities. When you film the spider it will act normally and go about it's business as usual. When, however, you decide to try and get a night shot of feeding behaviour, this will not be entirely accurate as some prey items (notably in my case locusts and black crickets) seem to be able to sense this light source, and thus react accordingly (being more warey and skittish), this behaviour of the prey affects the tarantulas' behaviour itself.
I have had more "natural" night time feeding behaviour when using a night light (filtered red bulb) and a high end "low light capable" camera

The downsides to this CCD changing are the resulting quality at full TV screen, and the fact that your camera tends to need to be cleaned (dust blown of sensor) more often.

Hope this helps you out a bit

[Rich.Harrington]

Thanks collin yeah it helps alot, I'm guessing that T's cannot see IR from what you said, as for feeding well I can handle that, as it is more to be able to just watch it when it strolls about the enclosure.

[Colin D Wilson]

Like i stated, just my observations from attempting to film.
Studies of invertebrate vision has led some entomologists to believe that all invertebrates are able to see, and process, through the full spectrum, but dismiss certain information as and when they need to for performing simple tasks (ie walking round odjects), but when feeding, mating or escaping a predator (for examples) extra information is processed and used in conjuction with other senses (ie tactile awareness in spiders )
Not sure how exact these theories are, but interestng non the less, and as in all nature studies, it's a massive learning curve.

[Rich.Harrington]

Interesting points you make there, and again many thanks for the info.