RARI Logo

   home

calendar         contact         donate    

Loading


OPPORTUNITIES

e-Newsletter

Sign up below for Reptile and Amphibian Ecology Online, our periodic e-newsletter. It's an easy way to keep in touch and find out about the goings on in the lives of frogs, lizards, snakes and their kin.

*







Join a Photographic
Expedition to the
Amazon Rainforest

amazon photo workshop


Help Save Animals and Ecosystems: Donate Now!

purchase photos


Purchase Photographic Prints and Support Our Work
photo prints

Methods

Our field methods involve a combination of biological surveying and monitoring, habitat quantification, mark-recapture, and tissue collection. The surveying and monitoring techniques reveal the community composition and diversity, along with population sizes and trends. We accomplish this primarily through visual-encounter surveys. The two types of visual-encounter surveys we carry out are transects and area searches. In transects, paths are walked along either features of the landscape (such as trails or streams), or standardized linear routes, often in a series of parallel lines within a certain homogenous habitat type. Every animal of interest is recorded, and a record may include photos, measurements, and microhabitat characterization. Area searches, on the other hand, are a less rigid method, in which a pre-defined area (e.g. 50 x 50m) is searched for a certain time period and specific microhabitats might be searched more than others. Again, every animal of interest is recorded.


The patchwork of deforestation from cattle grazing allows an ideal opportunity to
study the effects of grazing on animal distributions. The bare patches on this
slope are cleared every year, and are surrounded by intact forest.

Particularly rare, interesting, and/or photogenic animals are taken back to the on-site "lab" for more photos and measurements. We will also be taking DNA samples from some animals. This is usually done through a blood sample or mouth swab, although sometimes more invasive procedures need to be performed. We also test amphibians for a disease spread by a fungal pathogen. We accomplish this by swabbing the animals' skin to collect DNA and then examining the sample with DNA sequencing technology to determine if the genetic material of the fungus is present. Almost all animals will be returned to the exact spot of capture, although on rare occasions (e.g. a potential new species is found) a specimen may be taken as a voucher.

 

Mexico Tropical Forest Project



Reptile and Amphibian Ecology International is a US 501(c)(3) nonprofit charity organization and all donations are 100% tax-deductible.
All photos and content © Reptile and Amphibian Ecology International and/or Paul S. Hamilton (unless noted) | Contact | Webmaster