SEPTEMBER 12, 2023 — New research suggests that owls in Texas have high rates of anticoagulant rodenticides (AR)—blood thinning rat poisons—in their systems. Jennifer Smith, a professor of integrative biology in the UTSA College of Sciences, co-authored a research article published recently in PLOS ONE, the world’s first multidisciplinary open access journal.
Eres Gomez, M.S. ’22, a UTSA graduate who had conducted research in the Smith Wildlife Lab as a student, was the article’s lead author. Heather Prestridge, a curator in the Texas A&M University Department of Ecology and Conservation Biology at the Biodiversity Research and Teaching Collections (BRTC) also co-authored the article.
Entitled, “Anthropogenic threats to owls: Insights from rehabilitation admittance data and rodenticide screening in Texas,” the article assesses the anthropogenic risks faced by owls in Texas, an important region for migratory and non-migratory owls. Anthropogenic risks are hazards that are human made. They range from electric fence and vehicle collisions to exposure to ARs, including those that are heavily regulated by the Environmental Protection Agency (EPA) due to their toxicity and poisoning hazards to wildlife.
“Owls are incredible predators who help control rodent populations, and thus may be important for minimizing damage to crops and human structures caused by rodent pests and for providing control of diseases associated with rodents,” Smith said. “Because of the vital role they play in the ecosystem, it is important we support conservation efforts to ensure their survival. This study can facilitate this goal by informing strategies that mitigate the effects of anthropogenic threats faced by owls.
Smith and her collaborators utilized rehabilitation center data and liver screening data to measure AR levels in liver samples collected from deceased owls who were admitted into the Last Chance Forever the Bird of Prey Conservancy (LCF) and Wildlife Rescue & Rehabilitation, Inc. (WRR), two wildlife rehabilitation facilities that primarily receive owls from South and Central Texas. Additional liver samples were collected from deceased owls found in the wild and from owl specimens housed in the BRTC at the A&M campus at College Station.
Smith’s team discovered a high occurrence of AR exposure, with 51% of the owls in their study testing positive.
In 2011, the EPA banned the sale of brodifacoum and bromadiolone—the ARs that were detected the most by Smith’s research team—for the general public and residential consumers. However, they are still permitted for purchase and use by by pest control operators and the agricultural sector for rodent removal.
“To reduce AR exposure, we recommend using alternative measures to control rodents,” Smith said. “For example, natural methods can be used as part of an integrated pest management strategy that considers a mix of nontoxic lethal or nonlethal methods such as habitat modification, trapping and nontoxic repellants.”
Additionally, the research team encourages the development of educational programs to increase awareness of the effects of ARs on non-target wildlife such as owls.
The research program was funded by donations to the Smith Wildlife Lab from local community members following outreach efforts made by Smith and Gomez. The team conducts research that informs policy and promotes sustainable land uses that consider the conservation of wildlife and human well-being. It is currently expanding its research by investigating how urbanization increases risks to owls.
In 2018, Smith joined UTSA as an assistant professor of wildlife biology. Prior to her UTSA appointment, she was a research scientist at Virginia Tech where she led numerous projects focused on anthropogenic effects on wildlife. Smith is originally from the United Kingdom, where she completed a B.Sc. in Zoology at Cardiff University, Wales, and then earned her Ph.D. at the University of Birmingham.
September is National Hispanic Heritage Month. House of Neighborly Service is gearing up to increase awareness of the growing needs of our Westside community while embracing our Hispanic culture every step of the way. Our team is excited to announce the First Annual La Casita del Barrio 1K/5K Walk/Run.Our Lady of the Lake University, 11 SW 24th St, San Antonio, TX 78207
Come experience a Hispanic Market with us!Rowdy Statue
We will be reading For Brown Girls with Sharp Edges and Tender Hearts by Prisca Dorcas Mojica Rodriguez. We will meet on Zoom to discuss the book. The book is free for students who request it, please email firstname.lastname@example.org to request the book and/or to join the Book Club and receive messages and information about this and future readings and discussions.Virtual Event
Come and practice your Spanish in a friendly and engaging environment! You will also learn about Hispanic cultures with us as we play games, watch videos, sing, and participate in many other language and cultural activities! All levels are welcome! ¡Nos vemos!Willow Room (SU 2.02.12,) Main Campus
In partnership with UTSA Libraries and the Consulado General de México en San Antonio, Carriqui will host Ven a Tomar, where guests will sample mezcal, cocktails and unique bites to celebrate UTSA's Mexican Cookbook Collection.Carriqui, 239 E Grayson St San Antonio, TX 78215
The UTSA Orchestra will be performing Rapsodia Mexicana, a captivating concert celebrating Mexican music and the confluence of cultures in South Texas. Joined by organist Colin Campbell (Texas A&M International University) and UTSA's Mariachi Los Paisanos, watch as the orchestra brings to life the essence of Hispanic culture through their powerful performances.UTSA Recital Hall, Main Campus
A fun night for UTSA students to relax and play loteria. Student Success Centers will also have recourses for students to learn more about programs and services.Denman Ballroom (SU 2.01.28,) Main Campus
The University of Texas at San Antonio is dedicated to the advancement of knowledge through research and discovery, teaching and learning, community engagement and public service. As an institution of access and excellence, UTSA embraces multicultural traditions and serves as a center for intellectual and creative resources as well as a catalyst for socioeconomic development and the commercialization of intellectual property - for Texas, the nation and the world.
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UTSA is a proud Hispanic Serving Institution (HSI) as designated by the U.S. Department of Education.
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