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Ivan Castro-Arellano, Ph.D.



Assistant Professor

Phone: 512-245-5546

Fax: 512-245-8713


Mailing Address
Department of Biology
Texas State University, San Marcos
601 University Drive
San Marcos, TX 78666 USA




Research Interests

Disease Ecology

  • Zoonotic diseases
  • Hantavirus ecology

Community Ecology

  • Temporal Niche Overlap
  • Metacommunity Theory

Mammal Ecology
Invasive Species


I use my background and training as an ecologist to address questions to understand the ecology of zoonotic diseases and invasive species.  Since mammals are natural reservoirs for many zoonotic diseases most of my work has been devoted to this taxonomic group, especially rodents and bats.  Beyond my interest in disease ecology I also have done research on theoretical aspects of community ecology, specifically on the analysis of assemblage-wide temporal niche overlap and elements of metacommunity structure.  I address these questions using a variety of approaches that include modelling, null models, and analyses of both published and empirically data generated at my lab.  Although my research interests are wide they are intertwined and my goal is to integrate the study of community level dynamics in mammalian hosts to understand the dynamics of pathogen transmission.

Courses Taught

BIO4423-5423: Wildlife Management
BIO5424B: Ecology of Infectious Diseases in Wildlife
BIO7120: Population and Conservation Biology Seminar

Recent Publications

For a list of recent publications and access to the pdf’s of these papers you can access my Researchgate profile ( or my Google Scholar profile (


Postdoc  2006-2008 University of Connecticut Center for Enviromental Sciences and Engineering
PhD 2005 Texas A&M Wildlife and Fisheries Sciences
MS 2000 Texas A&M Wildlife and Fisheries Sciences
BS 1997 National Autonomous Unviersity of Mexico Biology


Major Grants


2016-2018 ($107,501) PI.  Texas Parks and Wildlife State Wildlife Grants.  Studying Behavior and Testing Strategies to Reduce Impact of Wind Energy on Bats in Texas.
2015-2016 ($69,717) Co-PI.  Texas Parks and Wildlife State Wildlife Grants.  Distribution of the Texas Kangaroo Rat (Dipodomys elator) in Texas
2015-2017 ($386,463) Co-PI.  NIH R21 (PA13-303).  Population genetic structure of Ixodes scapularis and disease transmission.  $138,230 subaward to Texas State University.
2014-2016 ($1,000,000).  Research project for Integrated Control of the Southern Cattle Fever tick in Puerto Rico.  Puerto Rico Department of Agriculture.  $101,793 for Castro-Arellano as PI for sub award project: Possible role of invasive Herpestes javanicus in sustaining cattle fever tick populations in Puerto Rico.
2012-2014 ($390,014) Research Supervisor (PI).  Texas Department of Transportation.  Contribution of Bridge Dwelling Birds to Bacterial Quality Impairments
2012-2015  ($130,000 aprox).  Co-PI with Gerardo Suzan (PI). Consejo Nacional de Ciencia y Tecnologia (Mexico).  Proyecto de ciencia básica #179482.  Effect of diversity on the prevalence of zoonotic agents in wild rodents in northeastern Chihuahua.
2010-2012. ($24,000) PI.  Texas A&M-CONACyT Collaborative Research Grant Program.  Prevalence and characterization of Hantaviruses and Arenaviruses in wild and peridomestic settings of northeastern Mexico.


Pictures from the field


Wildlife Management class, Fall 2013 at Mason Mountain Wildlife Management Area.


Wildlife Management class, Fall 2014 at Mason Mountain Wildlife Management Area.


Fieldwork in Puerto Rico related to the invasive Small Asian Mongoose


Doing telemetry work in Puerto Rico to ascertain home range of Small Asian Mongoose in Puerto Rico