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University of Texas Rio Grande Valley

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Articles 1 - 30 of 78

Full-Text Articles in Animal Sciences

Investigation Of The Pangas (Pangasianodon Hypophthalmus) Cultivation Sustainability In Cages At The Ratargul Freshwater Swamp Forest Of Bangladesh, Mrityunjoy Kunda, Md. Abu Kawsar, Diponkor Adikari, Sakib Tahmid Rishan, Ahmed Harun-Al-Rashid, Debasish Pandit Aug 2024

Investigation Of The Pangas (Pangasianodon Hypophthalmus) Cultivation Sustainability In Cages At The Ratargul Freshwater Swamp Forest Of Bangladesh, Mrityunjoy Kunda, Md. Abu Kawsar, Diponkor Adikari, Sakib Tahmid Rishan, Ahmed Harun-Al-Rashid, Debasish Pandit

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Determining the most appropriate stocking density for a specific fish species in an ambient condition is essential for successful cage aquaculture in terms of profitability which is mainly governed by growth. The current study was conducted to ascertain which stocking density gives the best result of widely cultured species in cage aquaculture, pangas (Pangasianodon hypophthalmus), at swamp forest environment of Ratargul Freshwater Swamp Forest, Bangladesh in terms of growth, production and economic return. Fish were reared for 93 days at three stocking densities, namely 30, 40 and 50 fish/m3 which were denoted as FSD30, FSD40 and FSD50, respectively, …


Road Mitigation Structures Designed For Texas Ocelots: Influence Of Structural Characteristics And Environmental Factors On Non-Target Wildlife Usage, Anna Rivera Roy, Kevin W. Ryer, Md. Saydur Rahman, John H. Young Jr., Richard J. Kline Jul 2024

Road Mitigation Structures Designed For Texas Ocelots: Influence Of Structural Characteristics And Environmental Factors On Non-Target Wildlife Usage, Anna Rivera Roy, Kevin W. Ryer, Md. Saydur Rahman, John H. Young Jr., Richard J. Kline

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Roads negatively impact wildlife through habitat fragmentation, loss of habitat connectivity, and wildlife-vehicle collisions, thus road mitigation structures, such as wildlife crossing structures (WCS), wildlife guards (WG), and fencing are commonly used to address this issue all over the world, including in the United States. In South Texas, such structures were built or modified along a State Highway in an effort to address road mortality for the endangered ocelot (Leopardus pardalis) and non-target wildlife species. The goal of this study was to examine temporal changes in wildlife interactions with WCS and WG during and after their construction and …


The Fishing Cat: New Insights On Distribution In The Northern Sector Of Chitwan National Park, Nepal, Rupesh Maharjan, Rama Mishra, Jhamak Bahadur Karki Jul 2024

The Fishing Cat: New Insights On Distribution In The Northern Sector Of Chitwan National Park, Nepal, Rupesh Maharjan, Rama Mishra, Jhamak Bahadur Karki

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Fishing cat Prionailurus viverrinus (Bennett, 1833) is an elusive and medium-sized feline species with distinguished marking patterns on their head and body separating them from other feline species. Despite being distributed widely among diverse geographic locations, their abundance has declined due to significant habitat loss and human disturbances. There exists a substantial research gap regarding their abundance and distribution in Nepal. In this article, we presented the updated documentation of the fishing cat distribution in the northern sector of Chitwan National Park through our species-focused camera trapping survey. The study was carried out between April and May 2021 with a …


Asynchronous Movement Patterns Between Breeding And Stopover Locations In A Long-Distance Migratory Songbird, Theodore J. Zenzal Jr., Andrea Contina, Hannah B. Vander Zanden, Leanne K. Kuwahara, Daniel C. Allen, Kristen M. Covino Jul 2024

Asynchronous Movement Patterns Between Breeding And Stopover Locations In A Long-Distance Migratory Songbird, Theodore J. Zenzal Jr., Andrea Contina, Hannah B. Vander Zanden, Leanne K. Kuwahara, Daniel C. Allen, Kristen M. Covino

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

The species-specific migratory patterns and strategies of many songbirds remain unknown or understudied, as research in animal ecology is biased toward the breeding period, with the fewest studies on the migratory period across taxa. Identifying large-scale spatiotemporal migratory patterns is challenging, as individuals within a species may vary in their migratory behavior and strategies. The Yellow Warbler (Setophaga petechia) is a Nearctic-Neotropical migrant that is relatively well studied during the breeding season, but its species-wide migratory patterns remain understudied. Our aim in studying Yellow Warbler movement ecology was to characterize temporal migration patterns during fall migration. We sought …


Eviction-Driven Infanticide And Sexually Selected Adoption And Infanticide In A Neotropical Parrot, Steven R. Beissinger, Karl S. Berg May 2024

Eviction-Driven Infanticide And Sexually Selected Adoption And Infanticide In A Neotropical Parrot, Steven R. Beissinger, Karl S. Berg

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Significance

Infanticide and adoption are puzzling forms of sexual conflict and cooperation, respectively. However, both may be explained by sexual selection, where an individual later reproduces with the parent whose offspring it killed or adopted. While sexually selected infanticide is well known, evidence for sexually selected adoption is anecdotal. Our long-term study of a parrotlet in Venezuela found infanticide attacks were mostly enacted by nonbreeding pairs attempting to evict parents from their nests to usurp the cavity. Infanticide attacks occurred less often at nests where a parent died, and adoption by stepparents was as common as infanticide. Becoming an adoptive …


Therapeutic Potential Of Snake Venom: Toxin Distribution And Opportunities In Deep Learning For Novel Drug Discovery, Anas Bedraoui, Montamas Suntravat, Salim El Mejjad, Salwa Enezari, Naoual Oukkache, Elda E. Sanchez, Jacob Galan, Rachid El Fatimy, Tariq Daouda Feb 2024

Therapeutic Potential Of Snake Venom: Toxin Distribution And Opportunities In Deep Learning For Novel Drug Discovery, Anas Bedraoui, Montamas Suntravat, Salim El Mejjad, Salwa Enezari, Naoual Oukkache, Elda E. Sanchez, Jacob Galan, Rachid El Fatimy, Tariq Daouda

School of Medicine Publications and Presentations

Snake venom is a rich source of bioactive molecules that hold great promise for therapeutic applications. These molecules can be broadly classified into enzymes and non-enzymes, each showcasing unique medicinal properties. Noteworthy compounds such as Bradykinin Potentiating Peptides (BPP) and Three-Finger Toxins (3FTx) are showing therapeutic potential in areas like cardiovascular diseases (CVDs) and pain-relief. Meanwhile, components like snake venom metalloproteinases (SVMP), L-amino acid oxidases (LAAO), and Phospholipase A2s (PLA2) are paving new ways in oncology treatments. The full medicinal scope of these toxins is still emerging. In this review, we discuss drugs derived from snake venoms that address …


Anti-Apostatic Feeding Behavior In Two Species Of Assassin Bug, The White-Spotted Assassin Bug Platymeris Biguttatus And Red-Spotted Assassin Bug Platymeris Rhadamanthus (Hemiptera: Reduviidae), Julia H. Potocnjak, Christopher Vitek Dec 2023

Anti-Apostatic Feeding Behavior In Two Species Of Assassin Bug, The White-Spotted Assassin Bug Platymeris Biguttatus And Red-Spotted Assassin Bug Platymeris Rhadamanthus (Hemiptera: Reduviidae), Julia H. Potocnjak, Christopher Vitek

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Predator-prey relationships are a driving force when examining community ecology. One question in predator-prey interactions is how a predator may respond to novel prey phenotypes, a form of frequency dependent prey selection. A predator may selectively target or avoid the novel prey, a behavior referred to as anti-apostatic or apostatic selection respectively. We examined apostatic prey selection by observing feeding behavior in two species of assassin bugs (Hemiptera: Reduviidae), the white-spotted assassin bug (Platymeris biguttatus) and the red-spotted assassin bug (Platymeris rhadamanthus) which were fed unmodified and modified (novel) phenotypes of Turkistan cockroaches, Blatta lateralis (Blattodea: …


Two New Phreatic Snails (Mollusca, Caenogastropoda, Cochliopidae) From The Edwards And Edwards-Trinity Aquifers, Texas, Kathryn E. Perez, Yamileth Guerrero, Roel Castañeda, Peter H. Diaz, Randy Gibson, Benjamin F. Schwartz, Benjamin T. Hutchins Dec 2023

Two New Phreatic Snails (Mollusca, Caenogastropoda, Cochliopidae) From The Edwards And Edwards-Trinity Aquifers, Texas, Kathryn E. Perez, Yamileth Guerrero, Roel Castañeda, Peter H. Diaz, Randy Gibson, Benjamin F. Schwartz, Benjamin T. Hutchins

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

The Edwards and Edwards-Trinity Aquifers of Texas have diverse stygofauna, including fifteen species of snails found in phreatic and hyporheic habitats. These species have the hallmarks of adaptation to subterranean environments including extremely small body size and the loss of pigmentation and eyes. Here we use an integrative taxonomic approach, using shell, radula, and anatomical features as well as mitochondrial and nuclear DNA data, to circumscribe a new genus and two new cavesnail species from Central Texas. Vitropyrgus lillianae gen. et sp. nov. is described from Comal Springs (Comal County) and Fessenden Springs (Kerr County) and distinguished by a glassy, …


Two New Phreatic Snails (Mollusca, Caenogastropoda, Cochliopidae) From The Edwards And Edwards-Trinity Aquifers, Texas, Kathryn E. Perez, Yamileth Guerrero, Roel Castañeda, Peter H. Diaz, Randy Gibson, Benjamin F. Schwartz, Benjamin T. Hutchins Dec 2023

Two New Phreatic Snails (Mollusca, Caenogastropoda, Cochliopidae) From The Edwards And Edwards-Trinity Aquifers, Texas, Kathryn E. Perez, Yamileth Guerrero, Roel Castañeda, Peter H. Diaz, Randy Gibson, Benjamin F. Schwartz, Benjamin T. Hutchins

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

The Edwards and Edwards-Trinity Aquifers of Texas have diverse stygofauna, including fifteen species of snails found in phreatic and hyporheic habitats. These species have the hallmarks of adaptation to subterranean environments including extremely small body size and the loss of pigmentation and eyes. Here we use an integrative taxonomic approach, using shell, radula, and anatomical features as well as mitochondrial and nuclear DNA data, to circumscribe a new genus and two new cavesnail species from Central Texas. Vitropyrgus lillianae gen. et sp. nov. is described from Comal Springs (Comal County) and Fessenden Springs (Kerr County) and distinguished by a glassy, …


Activity Patterns Of The Endangered Amargosa Vole (Microtus Californicus Scripensis), Austin N. Roy, Anna D. Rivera Roy, Deana L. Clifford, Janet E. Foley Dec 2023

Activity Patterns Of The Endangered Amargosa Vole (Microtus Californicus Scripensis), Austin N. Roy, Anna D. Rivera Roy, Deana L. Clifford, Janet E. Foley

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Examining the activity patterns of wildlife is an important aspect of understanding the ecology of a species and may be especially important for species of conservation concern. We used remotely triggered cameras to describe the daily and seasonal activity patterns and examine ecological factors that influence the activity of the Amargosa Vole (Microtus californicus scirpensis), a California endemic listed federally and by the state as Endangered, and is a marsh habitatspecialist in the Mojave Desert. We found that vole activity was greatest during crepuscular periods, followed by nocturnal and diurnal periods. We saw strong seasonal effects, with the highest activity …


A Framework For Transparency In Precision Livestock Farming, Kevin C. Elliott, Ian Werkheiser Oct 2023

A Framework For Transparency In Precision Livestock Farming, Kevin C. Elliott, Ian Werkheiser

Philosophy Faculty Publications and Presentations

Simple Summary

The emergence of precision livestock farming (PLF) raises important issues for many different social groups, including farmers, consumers, regulators, and the food industry. This paper explores how those who develop PLF systems can communicate more effectively with different groups about the technologies that they are creating. We suggest that developers reflect on four issues: (1) the different kinds of information that various groups might want to know; (2) the audiences that might care about these different kinds of information; (3) the major difficulties involved in providing the information; and (4) potential strategies for overcoming those difficulties.

Abstract

As …


Habitat Use And Winter Site Fidelity Of Lincoln’S Sparrow (Melospiza Lincolnii) In The Lower Rio Grande Valley Of Texas, Timothy Brush, Hugh E. Conway, Catherine C. Brush Jun 2023

Habitat Use And Winter Site Fidelity Of Lincoln’S Sparrow (Melospiza Lincolnii) In The Lower Rio Grande Valley Of Texas, Timothy Brush, Hugh E. Conway, Catherine C. Brush

Biology Faculty Publications and Presentations

No abstract provided.


The Strength Of Migratory Connectivity In Painted Buntings Is Spatial Scale Dependent And Shaped By Molting Behavior, Andrew J. Sharp, Andrea Contina, Viviana Ruiz-Gutiérrez,, T. Scott Sillett, Eli S. Bridge, Elizabeth M. Besozzi, John A. Muller, Jeffrey Kelly, Aaron M. Given, Clark S. Rushing Mar 2023

The Strength Of Migratory Connectivity In Painted Buntings Is Spatial Scale Dependent And Shaped By Molting Behavior, Andrew J. Sharp, Andrea Contina, Viviana Ruiz-Gutiérrez,, T. Scott Sillett, Eli S. Bridge, Elizabeth M. Besozzi, John A. Muller, Jeffrey Kelly, Aaron M. Given, Clark S. Rushing

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

As migratory species move through the stages of their annual cycle, individuals often display variation in the degree to which they remain in proximity to one another, a phenomenon called migratory connectivity. We show scale dependence in the strength of migratory connectivity in Painted Buntings (Passerina ciris), a North American passerine with disjunct eastern and interior breeding populations. Based on light-level geolocator data from 112 individuals at 11 breeding sites, migratory connectivity between breeding and wintering grounds was strong at the range-wide scale, with interior and eastern Painted Buntings remaining separated throughout the annual cycle. Conversely, migratory connectivity …


Metal Contents In House Geckos (Squamata: Gekkonidae) From Industrial And Urban Areas Of Southern Tamaulipas, Mexico And Western Andalucía, Spain, May Reflect Airborne Metal Pollution, Luisiana Morales-Zamudio, Alejandro Fierro-Cabo, Md Saydur Rahman, Miguel Antonio Dominguez-Crespo Feb 2023

Metal Contents In House Geckos (Squamata: Gekkonidae) From Industrial And Urban Areas Of Southern Tamaulipas, Mexico And Western Andalucía, Spain, May Reflect Airborne Metal Pollution, Luisiana Morales-Zamudio, Alejandro Fierro-Cabo, Md Saydur Rahman, Miguel Antonio Dominguez-Crespo

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

House geckos share living quarters with humans in the tropical and subtropical regions inhabited by these reptiles. Gecko behavior, biological traits, continuous exposure to suspended particulate matter 0 µm in diameter (PM10) and dust, as well as status as exotic species, motivated the choice of these species to examine environmental exposure to ambient air pollutants, in particular metals, and subsequent accumulation in these organisms. One part of the study was conducted in Tamaulipas (Mexico) where Hemydactylus frenatus is abundant in urban and industrial environments, the other part was conducted in Andalucia (Spain) where Tarentola mauritanica is found in similar environments. …


Winter Connectivity And Leapfrog Migration In A Migratory Passerine, Rafael Rueda‐Hernández, Christen M. Bossu, Thomas B. Smith, Andrea Contina, Ricardo Canales Del Castillo, Kristen Ruegg, Blanca E. Hernández-Baños Feb 2023

Winter Connectivity And Leapfrog Migration In A Migratory Passerine, Rafael Rueda‐Hernández, Christen M. Bossu, Thomas B. Smith, Andrea Contina, Ricardo Canales Del Castillo, Kristen Ruegg, Blanca E. Hernández-Baños

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Technological advances in migratory tracking tools have revealed a remarkable diversity in migratory patterns. One such pattern is leapfrog migration, where individuals that breed further north migrate to locations further south. Here, we analyzed migration patterns in the Painted Bunting (Passerina ciris) using a genetic‐based approach. We started by mapping patterns of genetic variation across geographic space (called a genoscape) using 386 individuals from 25 populations across the breeding range. We then genotyped an additional 230 samples from 31 migration stopover locations and 178 samples from 16 wintering locations to map patterns of migratory connectivity. Our analyses of …


Genetic And Ecological Drivers Of Molt In A Migratory Bird, Andrea Contina, Christen M. Bossu, Daniel Allen, Michael B. Wunder, Kristen Ruegg Jan 2023

Genetic And Ecological Drivers Of Molt In A Migratory Bird, Andrea Contina, Christen M. Bossu, Daniel Allen, Michael B. Wunder, Kristen Ruegg

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

The ability of animals to sync the timing and location of molting (the replacement of hair, skin, exoskeletons or feathers) with peaks in resource availability has important implications for their ecology and evolution. In migratory birds, the timing and location of pre-migratory feather molting, a period when feathers are shed and replaced with newer, more aerodynamic feathers, can vary within and between species. While hypotheses to explain the evolution of intraspecific variation in the timing and location of molt have been proposed, little is known about the genetic basis of this trait or the specific environmental drivers that may result …


Nilgai, Boselaphus Tragocamelus And White-Tailed Deer, Odocoileus Virginianus Use Of Water Troughs With And Without Remotely Operated Field Sprayers For Potential Treatment Of Cattle Fever Ticks, John A. Goolsby, Mauricio Cruz, Reyes Garcia Iii, Lauren P. Maestas, Teresa Patricia Feria-Arroyo Jan 2023

Nilgai, Boselaphus Tragocamelus And White-Tailed Deer, Odocoileus Virginianus Use Of Water Troughs With And Without Remotely Operated Field Sprayers For Potential Treatment Of Cattle Fever Ticks, John A. Goolsby, Mauricio Cruz, Reyes Garcia Iii, Lauren P. Maestas, Teresa Patricia Feria-Arroyo

Biology Faculty Publications and Presentations

Nilgai antelope, Boselaphus tragocamelus and white-tailed deer (WTD), Odocoileus virginianus are hosts of cattle fever ticks, Rhipicephalus (=Boophilus) microplus, in the Lower Rio Grande Valley of South Texas. Daily use of water troughs and ponds were observed to determine if these locations could be used for field treatment methods for cattle fever ticks using remotely operated field sprayers. Game cameras (n=16) were deployed between June 2020 and September 2022 at two private ranches in Cameron County, TX. Both nilgai and WTD visited water troughs equipped with motion detecting sprayers in similar numbers to ponds, but numbers of animal visits were …


Adult Home Range Size And Juvenile Movements Of Gray Hawks In The Lower Rio Grande Valley, Texas, Usa, Michael T. Stewart, William S. Clark, Brian A. Millsap, Brent D. Bibles, Timothy Brush Dec 2022

Adult Home Range Size And Juvenile Movements Of Gray Hawks In The Lower Rio Grande Valley, Texas, Usa, Michael T. Stewart, William S. Clark, Brian A. Millsap, Brent D. Bibles, Timothy Brush

Biology Faculty Publications and Presentations

We studied the natural history of Gray Hawks (Buteo plagiatus) in the Lower Rio Grande Valley of Texas. We used GPS-GSM telemetry to quantify dispersal time and distance, winter home range size of juveniles, and home range size of adults. Home ranges were calculated using the kernel Brownian bridge home range estimator. The median dispersal date for 14 juvenile Gray Hawks was 11 August and they traveled a median straight-line distance of 453 km. Mean winter home range sizes for 11 juveniles was 707 ha. For juveniles, female winter home ranges were larger than those of males, and …


Application Of Stable Isotopes To Study Movement Ecology And Diet Variation In A Migratory Songbird, Andrea Contina, Allison K. Pierce, Scott W. Yanco, Eli S. Bridge, Jeffrey F. Kelly, Michael B. Wunder Dec 2022

Application Of Stable Isotopes To Study Movement Ecology And Diet Variation In A Migratory Songbird, Andrea Contina, Allison K. Pierce, Scott W. Yanco, Eli S. Bridge, Jeffrey F. Kelly, Michael B. Wunder

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Whether and how migratory organisms exhibit interindividual behavioral and/or physiological variation across movement strategies remains an open question. The Dark-eyed Junco (Junco hyemalis) is a migratory songbird known for its intraspecies variation displayed in relation to morphology, song repertoires, and migration. Thus, studies focusing on juncos can reveal how migratory strategy may covary with other individual-scale factors and, therefore, identify the selective forces driving intraspecies variations throughout its distribution. We used Dark-eyed Junco hydrogen stable isotope feather values (δ²H) and implemented a Bayesian framework to infer the breeding and molting origin of migratory juncos captured on their winter grounds in …


Habitat Loss Exacerbates Pathogen Spread: An Agent-Based Model Of Avian Influenza Infection In Migratory Waterfowl, Shenglai Yin, Yanjie Xu, Mingshuai Xu, Mart C M De Jong, Mees Rs Huisman, Andrea Contina, Herbert H T Prins, Zheng Y X Huang, Willem F. De Boer Aug 2022

Habitat Loss Exacerbates Pathogen Spread: An Agent-Based Model Of Avian Influenza Infection In Migratory Waterfowl, Shenglai Yin, Yanjie Xu, Mingshuai Xu, Mart C M De Jong, Mees Rs Huisman, Andrea Contina, Herbert H T Prins, Zheng Y X Huang, Willem F. De Boer

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Habitat availability determines the distribution of migratory waterfowl along their flyway, which further influences the transmission and spatial spread of avian influenza viruses (AIVs). The extensive habitat loss in the East Asian-Australasian Flyway (EAAF) may have potentially altered the virus spread and transmission, but those consequences are rarely studied. We constructed 6 fall migration networks that differed in their level of habitat loss, wherein an increase in habitat loss resulted in smaller networks with fewer sites and links. We integrated an agent-based model and a susceptible-infected-recovered model to simulate waterfowl migration and AIV transmission. We found that extensive habitat loss …


Keeping 21st Century Paleontology Grounded: Quantitative Genetic Analyses And Ancestral State Reconstruction Re-Emphasize The Essentiality Of Fossils, Tesla A. Monson, Marianne F. Brasil, Michael Mahaney, Christopher A. Schmitt, Catherine E. Taylor, Leslea J. Hlusko Aug 2022

Keeping 21st Century Paleontology Grounded: Quantitative Genetic Analyses And Ancestral State Reconstruction Re-Emphasize The Essentiality Of Fossils, Tesla A. Monson, Marianne F. Brasil, Michael Mahaney, Christopher A. Schmitt, Catherine E. Taylor, Leslea J. Hlusko

School of Medicine Publications and Presentations

Advances in genetics and developmental biology are revealing the relationship between genotype and dental phenotype (G:P), providing new approaches for how paleontologists assess dental variation in the fossil record. Our aim was to understand how the method of trait definition influences the ability to reconstruct phylogenetic relationships and evolutionary history in the Cercopithecidae, the Linnaean Family of monkeys currently living in Africa and Asia. We compared the two-dimensional assessment of molar size (calculated as the mesiodistal length of the crown multiplied by the buccolingual breadth) to a trait that reflects developmental influences on molar development (the inhibitory cascade, IC) and …


Modeling The Impact Of Climate Change On Cervid Chronic Wasting Disease In Semi-Arid South Texas, Md Rafiul Islam, Ummugul Bulut, Teresa Patricia Feria-Arroyo, Michael G. Tyshenko, Tamer Oraby May 2022

Modeling The Impact Of Climate Change On Cervid Chronic Wasting Disease In Semi-Arid South Texas, Md Rafiul Islam, Ummugul Bulut, Teresa Patricia Feria-Arroyo, Michael G. Tyshenko, Tamer Oraby

Biology Faculty Publications and Presentations

Chronic wasting disease (CWD) is a spongiform encephalopathy disease caused by the transmission of infectious prion agents. CWD is a fatal disease that affects wild and farmed cervids in North America with few cases reported overseas. Social interaction of cervids, feeding practices by wildlife keepers and climate effects on the environmental carrying capacity all can affect CWD transmission in deer. Wildlife deer game hunting is economically important to the semi-arid South Texas region and is affected by climate change. In this paper, we model and investigate the effect of climate change on the spread of CWD using typical climate scenarios. …


A Tail Of Plumage Colouration: Disentangling Geographic, Seasonal And Dietary Effects On Plumage Colour In A Migratory Songbird, Sean M. Mahoney, Matthew W. Reudink, Andrea Contina, Kelly A. Roberts, Veronica T. Schabert, Emily G. Gunther, Kristen M. Covino Mar 2022

A Tail Of Plumage Colouration: Disentangling Geographic, Seasonal And Dietary Effects On Plumage Colour In A Migratory Songbird, Sean M. Mahoney, Matthew W. Reudink, Andrea Contina, Kelly A. Roberts, Veronica T. Schabert, Emily G. Gunther, Kristen M. Covino

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

Plumage ornamentation in birds serves critical inter- and intra-sexual signaling functions. While carotenoid-based plumage colouration is often viewed as a classic condition-dependent sexually selected trait, plumage colouration can be influenced by a wide array of both intrinsic and extrinsic factors. Understanding the mechanisms underlying variation in colouration is especially important for species where the signaling function of ornamental traits is complex or when the literature is conflicting. Here, we examined variation in the yellow/orange tail feathers of American redstarts Setophaga ruticilla passing through two migratory stopover sites in eastern North America during both spring and fall migration to assess the …


Filling The Gap: Molting Behavior Of Colima Warblers And Research Opportunities For Understudied North American Songbirds, Benjamin Gochanour, Jose L. Alcantara, Paula Cimprich, Jeffrey F. Kelly, Andrea Contina Feb 2022

Filling The Gap: Molting Behavior Of Colima Warblers And Research Opportunities For Understudied North American Songbirds, Benjamin Gochanour, Jose L. Alcantara, Paula Cimprich, Jeffrey F. Kelly, Andrea Contina

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

We implemented stable isotope analysis to evaluate the molt behavior of the Colima warbler (Leiothlypis crissalis), an understudied migratory songbird occurring in Mexico and recently discovered breeding in the southern part of Texas, USA. We built a geostatistical model showing variation in deuterium precipitation values (d2Hp) across a latitudinal gradient within the Colima warbler breeding range in northeastern Mexico. Then, based on stable isotope ratios of deuterium in feathers (d2Hf), we assigned wintering Colima warblers captured in Central Mexico to possible molting areas near the southwestern portion of the species' breeding range. To the best of our knowledge, this is …


Automatic Camera Trap Classification Using Wildlife-Specific Deep Learning In Nilgai Management, Matthew Kutugata, Jeremy Baumgardt, John A. Goolsby, Alexis Racelis Dec 2021

Automatic Camera Trap Classification Using Wildlife-Specific Deep Learning In Nilgai Management, Matthew Kutugata, Jeremy Baumgardt, John A. Goolsby, Alexis Racelis

Biology Faculty Publications and Presentations

Camera traps provide a low-cost approach to collect data and monitor wildlife across large scales but hand-labeling images at a rate that outpaces accumulation is difficult. Deep learning, a subdiscipline of machine learning and computer science, has been shown to address the issue of automatically classifying camera trap images with a high degree of accuracy. This technique, however, may be less accessible to ecologists, to small scale conservation projects, and has serious limitations. In this study, a simple deep learning model was trained using a dataset of 120,000 images to identify the presence of nilgai Boselaphus tragocamelus, a regionally specific …


Domesticating The Exotic? An Online Survey Of Attitudes Towards The International Wildlife Pet Trade, Andrea Contina, Christopher E. Anderson, David C. Hille, William F. Oakley, Eli S. Bridge, Jeffrey F. Kelly, Haley O. Smith, Jennifer Koch, Lori L. Jervis Sep 2021

Domesticating The Exotic? An Online Survey Of Attitudes Towards The International Wildlife Pet Trade, Andrea Contina, Christopher E. Anderson, David C. Hille, William F. Oakley, Eli S. Bridge, Jeffrey F. Kelly, Haley O. Smith, Jennifer Koch, Lori L. Jervis

School of Integrative Biological and Chemical Sciences Faculty Publications and Presentations

There are a variety of perspectives on wildlife management and conservation, necessitating interdisciplinary research to develop better management strategies. We answered the call to action provided by Teel et al. (2018) to integrate social sciences into conservation and explored an important but understudied issue: views on the international pet-trade of exotic animals. Some pet owners advocate the pet trade as a means to promote conservation, where removing wild animals from their natural habitat could protect them from degraded environments. To gauge how prevalent this attitude is in a cross-national sample, we conducted an online survey that asked 882 participants worldwide …


The Conservation Status Of The World’S Freshwater Molluscs, M. Böhm, N. I. Dewhurst-Richman, M. Seddon, C. Albrecht, D. Allen, A. E. Bogan, K. Cummings, G. Darrigran, W. Darwall, Kathryn E. Perez Jul 2021

The Conservation Status Of The World’S Freshwater Molluscs, M. Böhm, N. I. Dewhurst-Richman, M. Seddon, C. Albrecht, D. Allen, A. E. Bogan, K. Cummings, G. Darrigran, W. Darwall, Kathryn E. Perez

Biology Faculty Publications and Presentations

With the biodiversity crisis continuing unchecked, we need to establish levels and drivers of extinction risk, and reassessments over time, to effectively allocate conservation resources and track progress towards global conservation targets. Given that threat appears particularly high in freshwaters, we assessed the extinction risk of 1428 randomly selected freshwater molluscs using the IUCN Red List Categories and Criteria, as part of the Sampled Red List Index project. We show that close to one-third of species in our sample are estimated to be threatened with extinction, with highest levels of threat in the Nearctic, Palearctic and Australasia and among gastropods. …


First Description Of Deep Benthic Habitats And Communities Of Oceanic Islands And Seamounts Of The Nazca Desventuradas Marine Park, Chile, Jan M. Tapia-Guerra, Ariadna Mecho, Erin E. Easton, María De Los Ángeles Gallardo, Matthias Gorny, Javier Sellanes Mar 2021

First Description Of Deep Benthic Habitats And Communities Of Oceanic Islands And Seamounts Of The Nazca Desventuradas Marine Park, Chile, Jan M. Tapia-Guerra, Ariadna Mecho, Erin E. Easton, María De Los Ángeles Gallardo, Matthias Gorny, Javier Sellanes

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Seamounts and oceanic islands of the Chilean Exclusive Economic Zone at the intersection of the Nazca and Salas y Gómez ridges lie within one of the least explored areas in the world. The sparse information available, mainly for seamounts outside Chilean jurisdiction and shallow-water fauna of the Desventuradas Islands, suggests that the area is a hotspot of endemism. This apparent uniqueness of the fauna motivated the creation of the large Nazca-Desventuradas Marine Park (NDMP, ~ 300,000 km2) around the small islands San Felix and San Ambrosio in 2015. We report for the first time a detailed description of benthic microhabitats …


Transcriptomic Profiling Of Fibropapillomatosis In Green Sea Turtles (Chelonia Mydas) From South Texas, Nicholas B. Blackburn, Ana C. Leandro, Nina Nahvi, Mariana A. Devlin, Marcelo Leandro, Ignacio Martinez Escobedo, Juan M. Peralta, Jeff George, Thomas W. Demaar, John Blangero, Megan Keniry, Joanne E. Curran Feb 2021

Transcriptomic Profiling Of Fibropapillomatosis In Green Sea Turtles (Chelonia Mydas) From South Texas, Nicholas B. Blackburn, Ana C. Leandro, Nina Nahvi, Mariana A. Devlin, Marcelo Leandro, Ignacio Martinez Escobedo, Juan M. Peralta, Jeff George, Thomas W. Demaar, John Blangero, Megan Keniry, Joanne E. Curran

School of Medicine Publications and Presentations

Sea turtle fibropapillomatosis (FP) is a tumor promoting disease that is one of several threats globally to endangered sea turtle populations. The prevalence of FP is highest in green sea turtle (Chelonia mydas) populations, and historically has shown considerable temporal growth. FP tumors can significantly affect the ability of turtles to forage for food and avoid predation and can grow to debilitating sizes. In the current study, based in South Texas, we have applied transcriptome sequencing to FP tumors and healthy control tissue to study the gene expression profiles of FP. By identifying differentially expressed turtle genes in …


Molecular Characterization Of A Marine Turtle Tumor Epizootic, Profiling External, Internal And Postsurgical Regrowth Tumors, Kelsey Yetsko, Jessica A. Farrell, Nicholas B. Blackburn, Liam Whitmore, Maximilian R. Stammnitz, Jenny Whilde, Catherine B. Eastman, Devon Rollinson Ramia, Ana C. Leandro Feb 2021

Molecular Characterization Of A Marine Turtle Tumor Epizootic, Profiling External, Internal And Postsurgical Regrowth Tumors, Kelsey Yetsko, Jessica A. Farrell, Nicholas B. Blackburn, Liam Whitmore, Maximilian R. Stammnitz, Jenny Whilde, Catherine B. Eastman, Devon Rollinson Ramia, Ana C. Leandro

School of Medicine Publications and Presentations

Sea turtle populations are under threat from an epizootic tumor disease (animal epidemic) known as fibropapillomatosis. Fibropapillomatosis continues to spread geographically, with prevalence of the disease also growing at many longer-affected sites globally. However, we do not yet understand the precise environmental, mutational and viral events driving fibropapillomatosis tumor formation and progression.

Here we perform transcriptomic and immunohistochemical profiling of five fibropapillomatosis tumor types: external new, established and postsurgical regrowth tumors, and internal lung and kidney tumors. We reveal that internal tumors are molecularly distinct from the more common external tumors. However, they have a small number of conserved potentially …