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- Jul 16, 2004
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Sorry. I hate to rain on your picnic, but this is dead wrong. We've been doing it for decades. So have dozens, hundreds, maybe thousands of others.... Conditioning to be handled is impossible for Theriphosids as far as the scientists and hobbyists of today know. ...
This is particularly evident with the members of the Subfamily Theraphosinae, although members of other Subfamilies are by no means exempt. This Subfamily contains many of the more popular New World genera such as Aphonopelma, Brachypelma, Grammostola and a host of others.
In these it's not uncommon for newly captured individuals to bare their fangs and even attempt to bite the first time they are picked up. (Note that "picking up" is vastly different from merely herding them onto your outstretched hand. A lot safer for the tarantula too.) However, most species will, with successive handling, tame down quite nicely. With being handled in such fashion fewer than a dozen times (and for many, significantly fewer than this) they soon fail to turn to face the approaching hand, or adopt a defensive posture, or extend their fangs, or even struggle once in your grasp. There are clearly cases where they almost seem to enjoy being picked up, if projecting such a vertebrate emotion on them could be entertained as valid.
As I mentioned above, members of other Subfamilies also can be so conditioned as well. Pinktoes (genus Avicularia) come to mind. When first brought into captivity or first handled they tend to be rather high strung to the point of defecating at their handler (or anyone else standing nearby!), or even leaping from the hand. But with repeated, gentle handling many will tame to the point where they may be gently herded onto one's hand and allowed to "climb the ladder" without any overt signs of panic or concerted attempts to flee or jump.
Avicularia serve as a particularly good example because while being handled they tend to be rather jumpy and high strung, perhaps hyperactive would be a good description of it. And one might advance the argument that this hyperactivity is an indication that they are ill at ease with human contact and are, therefore, still not conditioned. I discount that, however, because after being handled several times, their level of hyperactivity declines, they stop defecating (if they ever did in the first place), and they stop leaping as though trying to escape (again, if they ever did in the first place). Say what you will, but this sounds a lot like conditioning to me. I'm sure Pavlov would have accepted it.
Undoubtedly! But, my self confidence would have little to do with the spider failing to erect it's fangs, for instance.... Have you considered the possibility that your self confidence with the animal hasn't made handling easier? ...
Asserting that tarantulas (or any other creature for that matter) are incapable of being conditioned implies that they are incapable of changing their responses to varying conditions or stimuli. The fact is that those creatures that are incapable of such changes are the ones that become extinct. There are far to many species of tarantulas living in far too many niches spread over far too much geography and far to much of geological time for that to be true.
End of Biology 101 class. Quiz on Friday.