Location: FSC 335
2001. Ph. D. Degree (Biology). University of South Florida, Tampa, Florida.
D. Dissertation: Hyla gratiosa and H. femoralis
[Anura: Hylidae] in West Central Florida: a comparative study of rarity and
1993. Masters of Science (Zoology). University of South Florida, Tampa, Florida.
Thesis: Effects of Urbanization on the Community of Anurans of a Pine Flatwood
Habitat in West Central Florida)
1987. Bachelor Degree in Biological Science
(Zoology). University of Sevilla, Sevilla, Spain
1986. Biology Major. University of Murcia, Murcia, Spain
Sevilla, Spain, I became interested in zoology (cool creatures!) early on in my
childhood as I was moving to Madrid, Toledo, and Murcia. During my youth, largely in Murcia, I spent most
of my weekends and summers hiking with the Boy Scouts of Spain and learning
about nature. At this time, I also
joined the environmentalist organization Asociacion de Naturalistas del Sureste
and became involved in bird banding, amphibian surveys, and general
conservation issues in Murcia and neighboring areas. While finishing college studies in Sevilla, I
was interested in ornithology postgraduate studies on the ecology of wading
birds in the Southwest of Spain. In 1988
however, I moved to the USA where I pursued my graduate degrees and developed
my passion for amphibians and reptiles. I spent 12 years in Florida soaking
Florida’s amazing biodiversity and, at the same time, saddened by its unbridled
agricultural and especially urban growth.
In 2002, I moved to Pennsylvania where I am happily teaching and doing
research on species that I love, especially box turtles, and lately
I am a vertebrate biologist, interested in ecology, behavior,
morphology, and evolution. My research emphasis is population biology of
amphibians and reptiles. With the use of comparative approaches, I examine
morphological, ecological, and behavioral specializations that explain the
current demographic status of species and communities. I am working on
generating models that predict the fate of species under pressure from human
I am establishing a long term and comparative study to address demographics
and conservation of Pennsylvania's Herpetofauna. A major part of this study is
being developed at Letterkenny Army Depot, Chambersburg, PA. I am
interested on life history traits, behavioral characteristics, phenotypic
plasticity, and their implications for the conservation of the species. In
my research strategy, I combine traditional herpetological and field ecology
techniques, as well as cutting edge remote sensing (GIS) and laboratory
techniques such as genetics and molecular biology. I often cooperate with
intramural and extramural colleagues interested in similar topics.
I am developing permanent lines of communication and interaction with
research institutions in Florida (USA), Andalucia (Spain), and Murcia
(Spain). I am committed to the early involvement of students in science
through my teaching and my research projects, with the goal of developing their
full understanding of the scientific methodology as well as the intricacies of
the biological world
Vertebrate Anatomy, BIO370
Biology: Organismal Diversity), BIO162
to Ecology, BIO142
Walter Jr., Naim Edwards and Pablo R.
Delis. 2012. Seasonal activity,
reproductive cycles, and growth of the pickerel frog, Lithobates palustris (LeConte, 1825), from Pennsylvania. Herpetological Bulletin 119: 1-8.
Walter Jr., Eugene Wingert, Randy W. Cassell, Pablo R. Delis, and Noel
Potter Jr. 2012. Status and distribution of the Eastern Spadefopot, Scaphiopus holbrookii (Harlan, 1835), in
Pennsylvania: state wide conservation implications for an imperiled species. Collinsorum 1(2/3): 20-24.
Walter Jr., Eugene Wingert, Randy Cassell, Pablo R. Delis, and Sarah A. Mortzfeldt. 2011. Breeding episodes
of the Eastern Spadefopot, Scaphiopus
holbrookii (Harlan, 1835), in Central Pennsylvania. Journal of Kansas Herpetology 40: 10-12.
Walter Jr., Pablo R. Delis, and Sarah
A. Mortzfeldt. 2011. Seasonal
Activity, Reproductive Cycles, and Growth of the Northern Leopard Frog, Lithobates
pipiens (Schreber, 1782), From
Pennsylvania. Bulletin of the
Maryland Herpetological Society, 47: 23-35.
Delis, Pablo R., R. S.
Stewart, and C. Kindlin. 2010. The Herpetofauna of Letterkenny Army
South-Central Pennsylvania: A Starting Point to the Long-Term Monitoring and
Management of Amphibians and Reptiles. Journal
of Kansas Herpetology 34: 11-16.
Hepler (Starting in 2012). Turtle Community in Wetlands in Letterkenny Army
Deport, South-Central Pennsylvania, PA.
Russell (Starting in 2012). Morphological variation in Ringneck Snakes, Diadophis punctatus, in Pennsylvania.
Hughes (In Progress, 2012). Ophidian Community in Wetlands in Letterkenny Army
Deport, South-Central Pennsylvania, PA.
Anderson (In Progress, 2011). Ophidian Colonization of a Reclaimed Wetland in
South-Central Pennsylvania, PA.
Humbert. Graduated 2012. Morphometrics and Ecology of the Genus Anaxyrus in South Central Pennsylvania,
Student Research Projects
Ryan Klinger (In Progress 2012). Automated Anuran Calling Surveys
Stephanie Williams (In Progress 2012). Marble Salamander Biology
Sarah Bartle (In Progress 2011-2012). Turtle Biology and Marble Salamander Biology
Wilkerson (In Progress 2011-2012). Urban Snake Community
Alexander F. Delis (In Progress 2011-2012). Turtle Shell Biomechanics