Principal Investigator

Patricia A. Burrowes

Ph.D. in Ecology and Systematics/Herpetology

University of Kansas, Lawrence KS USA

Advisor: Dr. William E. Duellman
Present Contact Information:  

Department of Biology,

University of Puerto Rico

PO BOx 23360                     

San Juan, PR 00931-3360. 


Phone: (787) 764-0000 Ext. 88124




Lab Technician

Junangel Aleman Rios

I am a graduate researcher from the University of Puerto Rico, Rio Piedras Campus. I completed my bachelor’s degree in integrative biology, as well as a second concentration in environmental sciences. My research interests include behavioral ecology of amphibians, environmental education and technology development for research. I collaborate in Riccardo Papa's lab, on the genetics and genomics of color and shape of butterfly wings. I've also collaborated on a major acoustics census project with Rainforest Connections that involved data collection in 838 sites and over 1,500,000 recordings. Future plans involve enrolling in graduate school and perusing a career as a researcher. 



Graduate Students

Peter Delgado

My research interests include eco-physiology and population biology of tropical anurans.  My thesis involves studying populations of a local endemic tree frog, Eleutherodactylus portoricensis, under two risk factors: climate warming and disease. I am investigating the potential role of increasing temperatures and the chytrid fungus, Batrachochytrium dendrobatidis, in causing the evident range contraction of E. portoricensisto higher elevations.  This work takes me to the humid forests of the mountains, requires some molecular biology lab work, and lots of experimental creativity to assess the thermal biology of this species. The good news….is that I enjoy all of it! 

Janelle Peña


My interests and contributions to the lab include: disease ecology, behavioral ecology and quantitative ecology.  My Master's reserch has changed significantly since hurricane Maria hit Puerto Rico on september 2017. Currently I am interested on the effectthe hurricane had on amphibian population abundance, structure, habitat use, and response to the pathogenic chytrid fungus.

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Peter, Janelle and Patricia discussing the field work  plan for the night.

Undergraduate Students

Currently, our lab has 6 undergraduate students who have all shown great interest, commitment, potential and leadership skills while being a part of our herpetology family. Below are a collection of pictures during lab and field work. We always aspire to teach and mentor students that show interest in our research, especially those who show great potential and accept the challenge of joining our lab.


Lynn Moreira, Emmanuel Santiago and Paola Burgos (from left to right) swabbing Eleutherodactylus coqui frogs for future DNA extraction procedures

Zuania Colon, Lynn Moreira and Roberto Oliveras (from left to right) getting the Eleutherodactylus coqui frogs ready for snout to vent length and weight measurements. Zuania Colon is a graduate student from the University of Florida, who came to help out, as part of frequent collaborations with Ana Longo's research lab. 


Junangel Aleman Rios, helping Nicole Padro and Roberto Oliveras (left to right) with a juvenile frog that was tricky to swab due to its miniscule size. 

Lynn Moreira, Nicole Padro and Paola Burgos (left to right), excited to start field work after just arriving at our study site at El Yunque National Forest. 

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Claudia Saldana excited and relieved that she just completed her first insertion procedure of a Passive Internal Transponder tag to an adult Eleutherodactylus coqui frog. 

Emmanuel Santiago and Junangel Aleman Rios giving Camila Adorno a boost in order to capture an Eleutherodactylus coqui frog that happened to chose a 4 meter calling site. Camila Adorno is a frequent undergraduate student volunteer from the University of Sacred Heart. 

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