About the latex gloves, here's an interesting pdf I just found from the Association of Zoos and Aquariums on the handling of amphibians (this is a 5mb, 236 page pdf):
http://www.aza.org/uploadedFiles/Con...ourceGuide.pdf
It recommends non-powdered latex or vinyl gloves for amphibians, but suggests (page 121) that latex gloves may be harmful to tadpoles and other larvae.
They cite this study,
Cashins, S., R.A. Alford, and L.F. Skerratt. 2008. Lethal effect of latex, nitrile, and vinyl gloves
on tadpoles. Herpetological Review 39:298-301.
Whose full pdf (yayy!) is available here Lethal effect of latex, nitrile, and vinyl gloves on tadpoles - ResearchOnline@JCU
(I haven't read it yet, but the summary suggests well rinsed vinyl is less hazardous then nitrile or latex)