Presentations

2024

Chau, K., Oakley, J.W., Vega, R., and Guillen, G. 2024. Floating treatment wetlands: a pilot-study and large-scale field trial of the stormwater treatment potential in urban catchments in a subtropical environment. Houston-Galveston Area Council Clean Waters Initiative Workshop: Green Infrastructure, Houston, TX. Presentation.

Oakley, J.W., Curtis, S., Swinford, J., Anderson, J., Davis, S., Fredrickson, A., Sak, A., Underwood, E., Kean, P., and Guillen, G. 2024. Eel ramps and eDNA detect recruitment of American eel (Anguilla rostrata) in Texas. Annual Meeting of the Texas Chapter of the American Fisheries Society, Nacogdoches, TX. Presentation.

Perkins, K.J., Oakley, J.W., and Pilgrim, E. 2024. Using eDNA metabarcoding to assess fish assemblages in the rivers and streams of Texas. Annual Meeting of the Texas Chapter of the American Fisheries Society, Nacogdoches, TX. Presentation.

2023

Castillo, A., Oakley, J.W., Hanke, M., Batte, S., Leija, H., and Guillen, G. 2023. Persistence of dermo (Perkinsus marinus) in sun-cured eastern oysters (Crassostrea virginica). Houston Regional Ecology & Evolution Symposium, La Marque, TX. Poster.

Chau, K., Oakley, J.W., Vega, R., and Guillen, G. 2023. Floating treatment wetlands: a pilot-study and large-scale field trial of the stormwater treatment potential in urban catchments in a subtropical environment. Houston Regional Ecology & Evolution Symposium, La Marque, TX. Presentation; 3rd place.

Cox, E., Oakley, J.W., and Guillen, G. 2023. Estimating abundance of microplastics in surface waters of the Galveston Bay watershed. Texas Plastics Pollution Symposium, Houston, TX. Presentation; 3rd place.

DeChellis, D., Mokrech, M., Gordon, M., and Guillen, G. 2023. Influence of ecological and anthropogenic factors on the distribution and habitat associations of western chicken turtles (Deirochelys reticularia miaria) in Texas. Cypress and Sulphur Basin Clean Rivers Program Stakeholder Annual Meeting. Virtual presentation.

DeChellis, D.M., Mokrech, M., Gordon, M., and Guillen, G.J. 2023. Species distribution modeling for the western chicken turtle (Deirochelys reticularia miaria) in Texas. Houston Regional Ecology & Evolution Symposium, La Marque, TX. Presentation.

Garcia, K., Gordon, M., and Guillen, G. 2023. Evaluation of anthropogenic disturbances of alligator snapping turtles (Macrochelys temminckii). Cypress and Sulphur Basin Clean Rivers Program Stakeholder Annual Meeting. Virtual presentation.

Gordon, M.L., Nagro, J., DeChellis, D., Collins, L.,  Nelson, H., Apodaca, J.J., Oakley, J., and Guillen, G.J. 2023. Use of environmental DNA for detecting cryptic species in wetland habitats: a case study of the western chicken turtle (Deirochelys reticularia miaria). Texas Chapter of The Wildlife Society Annual Meeting, Houston, TX. Presentation.

Munscher, E.C., Gordon, M., Sankey, T., Tuggle, A., Walde, A., Garcia, K., and Giles, B. 2023. Hidden in plain sight: alligator snapping turtle (Macrochelys temminckii) populations within urban waterways of Houston, Texas, Harris County, USA. International Urban Wildlife Conference, Washington, D.C. Presentation.

Oakley, J.W., Curtis, S., Swinford, J., Sak, A., Underwood, E., Kean, P., Anderson, J., Davis, S., Fredrickson, A., and Guillen, G. 2023. Eel ramps and eDNA to detect recruitment of American eel (Anguilla rostrata) in Texas. Annual Meeting of the Texas Chapter of the American Fisheries Society, Corpus Christi, TX. Poster.

Oakley, J.W., Lesher, S., Hanke, M., Guillen, G., Batte, S., and Leija, H. 2023. Persistence of dermo (Perkinsus marinus) in sun-cured eastern oysters (Crassostrea virginica). Annual Meeting of the Texas Chapter of the American Fisheries Society, Corpus Christi, TX. Presentation.

Perkins, K., Oakley, J., and Pilgrim, E. 2023. Evaluation of the use of eDNA metabarcoding to assess fish assemblages in the rivers and streams of Texas. Houston Regional Ecology & Evolution Symposium, La Marque, TX. Poster.

Sak, A., Underwood, E., Oakley, J.W., Curtis, S., Kean, P., Swinford J., Anderson, J., Davis, S., Fredrickson, A., and Guillen, G. 2023. Determining recruitment timing and distribution of American eel (Anguilla rostrata) in Texas utilizing eel ramps. Houston Regional Ecology & Evolution Symposium, La Marque, TX. Presentation.

2022

Chau, K., Oakley, J.W., Vega, R., and Guillen, G. 2022. Floating treatment wetlands: a pilot-study of the stormwater treatment potential in urban catchments in a subtropical environment. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Cox, E., Steinhaus, J., Anderson, K.D., and Guillen, G. 2022. Estimating abundance of microplastics in surface waters and sediments of the Galveston Bay watershed. Texas Plastic Pollution Symposium, Port Aransas, TX. Poster.

Cox, E., Steinhaus, J., Anderson, K.D., and Guillen, G. 2022. Estimating abundance of microplastics in surface waters and sediments of the Galveston Bay watershed. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

DeChellis, D., Guillen, G., and Gordon, M. 2022. Preliminary analyses of landscape-scale impacts on western chicken turtles in Texas. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Dennis, W.G., Mussmann, S., Fedrizzi, N., Stephens, B., Oakley, J., and Guillen, G. 2022. Genetic ecology of the dwarf seahorse (Hippocampus zosterae) in Texas. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Poster.

Fazioli, K.L. and Mintzer, V.J. 2022. Effects of salinity on distribution and epidermal integrity of bottlenose dolphins (Tursiops truncatus) in Galveston Bay, Texas. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Garcia, K., Gordon, M., Munscher, E., Tuggle, A., Franklin, C., Ricardez, V., and Guillen, G. 2022. Do anthropogenic stressors affect distribution of alligator snapping turtles (Macrochelys temminckii) in Texas? Preliminary study design. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Gordon, M. 2022. Northeast Texas aquatic turtle surveys: western chicken turtles & alligator snapping turtles. Sulphur River Basin Authority and Northeast Texas Municipal Water District Stakeholder Meetings. Virtual presentations.

Gordon, M., Speight, L., and Collins, A. 2022. Nose to the ground: using detector dogs to sniff out the cryptic western chicken turtle (Deirochelys reticularia miaria). Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation (presented by D. DeChellis).

Lesher, S.C., Oakley, J., and Guillen, G. 2022. Dwarf seahorse (Hippocampus zosterae) distribution, abundance, and sampling gear catch efficacy in Texas. Annual Meeting of the Texas Chapter of the American Fisheries Society, Hunt, TX. Poster.

Lesher, S.C., Oakley, J., and Guillen, G. 2022. Relationship between seagrass and dwarf seahorse (Hippocampus zosterae) abundance and distribution in Texas. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Nagro, J., Gordon, M., Mokrech, M., and Guillen, G. 2022. Birds eye view: preliminary use of small unmanned aerial systems (sUAS) for aquatic turtle surveys. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Oakley, J.W., Hansen, J., Curtis, S., and Guillen, G. 2022. Extensive field effort using a novel gear type to detect recruitment of American eel (Anguilla rostrata) in Texas. Texas Academy of Science, 125th Annual Meeting, Houston, TX. Presentation.

Oakley, J.W., Lesher, S., Ulibarri, R., and Guillen, G. 2022. Distribution, density, and habitat association of the dwarf seahorse (Hippocampus zosterae) in Texas. Texas Bays and Estuaries Meeting, Port Aransas, TX. Presentation.

Oakley, J.W., Curtis, S., Hansen, J., Sak, A., Underwood, E., Swinford, J., Anderson, J., and Guillen, G. 2022. Determination to detect recruitment of American eel (Anguilla rostrata) in Texas. Texas Bays and Estuaries Meeting, Port Aransas, TX. Poster.

2021

Gordon, M. 2021. East Texas aquatic turtle surveys: western chicken turtles and alligator snapping turtles. Cypress Basin Clean Rivers Program Stakeholder Meeting. Virtual Presentation.

Gordon, M. 2021. Western chicken turtle project updates, online reporting tool debut, and announcement of alligator snapping turtle project. East Texas Initiative Stakeholder Meeting. Virtual presentation.

Oakley, J.W. 2021. Targeted bacteria monitoring in the Houston-Galveston area. Bacteria Implementation Group Meeting, Houston-Galveston Area Council. Virtual presentation.

2020

Fazioli, K., Mintzer, V., and Guillen, G. 2020. Monitoring bottlenose dolphins in Galveston Bay, Texas. Galveston Bay Estuary Program, State of the Bay Symposium, Galveston, TX. Presentation.

Gordon, M. 2020. Can eDNA identify the needle in a haystack: searching for the western chicken turtle in Texas. East Texas Initiative Stakeholder Meeting. Virtual presentation.

Mays, K., Curtis, S., McCoy, G., Hendrickson, D.A., Cohen, A.E., Casarez, M., Guillen, G., Oakley, J., and Hansen, J. 2020. Preliminary results of American eel sampling efforts in Gulf of Mexico drainages of Texas. Annual Meeting of the Southern Division of the American Fisheries Society, Little Rock, AR. Poster.

McDaniel, S. and Guillen, G.J. 2020. Foraging ecology of bottlenose dolphins (Tursiops truncatus) in Galveston Bay. Galveston Bay Estuary Program, State of the Bay Symposium, Galveston, TX. Poster.

Metz, T.L., Gordon, M.L., Mokrech, M., and Guillen, G. 2020. Movements of juvenile green turtles (Chelonia mydas) in nearshore waters of the northwestern Gulf of Mexico. Meeting of the Southeast Regional Sea Turtle Network, Corpus Christi, TX. Presentation.

Oakley, J.W., Guillen, G.J., Lawing, A.M., Armitage, A.R., and Gelwick, F.P. 2020. Ecosystem health assessment for the coastal Gulf of Mexico: opportunities for downscaling to Galveston Bay. Galveston Bay Estuary Program, State of the Bay Symposium, Galveston, TX. Presentation.

Omar, M.E., Oakley, J.W., Guillen G.J. 2020. Understanding ecology of Atlantic rangia in Galveston Bay: deciphering the role of freshwater inflows. Galveston Bay Estuary Program, State of the Bay Symposium, Galveston, TX. Presentation.

2019

Chau, K. and Gordon, M. 2019. Tracking invasives in Texas: a comparison of spatial distribution of invasive fish over the last decade. Annual Meeting of the Texas Academy of Sciences, Brownwood, TX. Poster.

Fazioli, K., Mintzer, V., and Guillen, G. 2019. In the path of floodwaters: short-term effects of Hurricane Harvey on bottlenose dolphins (Tursiops truncatus) in upper Galveston Bay, Texas. World Marine Mammal Conference, Barcelona, Spain. Presentation.

Gordon, M., Oakley, J.W., and Guillen, G.J. 2019. Staying close to home: seasonality and site fidelity of an insular population of Texas diamondback terrapins as determined by acoustic telemetry. 8th Triennial Meeting of the Diamondback Terrapin Working Group, Wilmington, NC. Presentation.

Guillen, G. 2019. Coast-wide characterization of saltmarsh topminnow – Fundulus jenkinsi populations in Texas. Annual Meeting of the Southern Division of the American Fisheries Society, Galveston, TX. Presentation.

Guillen, G. 2019. Effects of Hurricane Harvey on the water quality of the Galveston Bay Estuary, Texas. National Water Quality Monitoring Conference, Denver, CO. Presentation.

Hansen, J. 2019. The hunt for the elusive American eel in Texas: a story about eels and blue crab. Annual Meeting of the Southern Division of the American Fisheries Society, Galveston, TX. Presentation.

Oakley, J.W., Gelwick, F., Lawing, A.M., Armitage, A.R., and Guillen, G.J. 2019. Coastal health index for the northern Gulf of Mexico: how fisheries contribute to measuring ecosystem health. Annual Meeting of the Southern Division of the American Fisheries Society, Galveston, TX. Presentation.

Oakley, J.W., Gelwick, F., Lawing, A.M., Armitage, A.R., and Guillen, G.J. 2019. Developing a coastal health index for the northern Gulf of Mexico. National Water Quality Monitoring Conference, Denver, CO. Presentation.

Omar, M.E., Oakley, J.W., and Guillen, G.J. 2019. Understanding ecology of Atlantic rangia: toward better management of freshwater inflows. Coastal and Estuarine Research Federation, Mobile, AL. Poster.

Scanes, C., Oakley, J., and Guillen, G. 2019. Using national surveys to evaluate the condition of Texas state-wide fish communities. Annual Meeting of the Southern Division of the American Fisheries Society, Galveston, TX. Presentation.

2018

Buhler, K. and Guillen, G. 2018. Comparing habitat types and fish assemblages in the Flower Garden Banks mesophotic zone. Annual Meeting of the Texas Chapter of the American Fisheries Society, College Station, TX. Poster.

Gordon, M. 2018. National Aquatic Resource Surveys—monitoring our state. 32nd Annual Surface Water Quality Meeting of the Texas Commission on Environmental Quality, Hunt, TX. Presentation.

Guillen, G., Scanes, C., Gordon, M., Swanson, T., and Oakley, J. 2018. The influence of freshwater inflow on the estuarine nekton of a tidal river. Annual Meeting of the Texas Chapter of the American Fisheries Society, College Station, TX. Presentation.

Hansen, J., Oakley,J., Curtis, S., and Guillen, G. 2018. Hunting for the elusive American eel along the Texas coast. Biennial Gulf Estuary Research Society Meeting, Galveston, TX. Poster.

Mintzer, V., Fazioli, K., and Guillen, G. 2018. Short-term effects of Hurricane Harvey on dolphins in the upper Galveston Bay Estuary. 9th National Summit on Coastal and Estuarine Restoration and Management, Long Beach, CA. Poster.

Oakley, J.W., Scanes, C., Gordon, M., and Guillen, G. 2018. Recovery of Galveston Bay saltmarsh nekton communities after Hurricane Harvey. Annual Meeting of the Texas Chapter of the American Fisheries Society, College Station, TX. Poster.

Swanson, T., Oakley, J., and Guillen, G. 2018. Exploring impacts of physical stressors on fish diversity and abundance in the Brazos River estuary, Texas. Annual Meeting of the Texas Chapter of the American Fisheries Society, College Station, TX. Poster.

Warner, K.J., Guillen, G., and Hardy, T. 2018. Instream habitat use of invasive armored catfishes in the Upper San Marcos River. Annual Meeting of the Texas Chapter of the American Fisheries Society, College Station, TX. Presentation.

2017

Fazioli, K., Mintzer, V., and Guillen, G. 2017. Site fidelity of bottlenose dolphins (Tursiops truncatus) in a highly-industrialized estuary. Society for Marine Mammalogy, 22nd Biennial Conference on the Biology of Marine Mammals, Halifax, NS, Canada. Poster.

Guillen, G. and Mokrech, M. 2017. Mapping shallow reefs using low-cost side scanning sonar and drone photography systems. Gulf Coast Prairie Landscape Conservation Cooperative, Lafayette, LA. Webinar.

Vallery, A., Guillen, G., and Mokrech, M. 2017. Assessment of shorebird and wading bird populations in Galveston Bay using unmanned aerial vehicles. Texas Colonial Waterbird Society Meeting, Texas A & M University-Kingsville, Kingsville, TX. Presentation.

Vallery, A., Guillen, G., and Mokrech, M. 2017. Assessment of shorebird populations in Galveston Bay using conventional techniques and unmanned aerial vehicles. Texas Bays and Estuaries Annual Meeting, University of Texas Marine Science Institute, Port Aransas, TX. Poster.

Vallery, A., Guillen, G., and Mokrech, M. 2017. Assessment of shorebird populations in Galveston Bay using conventional and UAV techniques. 120th Annual Meeting of the Texas Academy of Science, University of Mary Hardin-Baylor, Belton, TX. Poster.

2016

Curtis, S., Oakley, J., Gordon, M., and Guillen, G. 2016. Development of methodology to validate freshwater needs of the Brazos River estuary. Texas Chapter of the American Fisheries Society, Kerrville, TX. Presentation.

Fazioli, K., Mintzer, V., Guillen, G., and Loe, S. 2016. Texas' estuarine bottlenose dolphins: addressing knowledge gaps in Galveston Bay. In Restore America's Estuaries, New Orleans, LA. Poster.

Guillen, G., Gordon, M., Curtis, S., and Oakley, J. 2016. The influence of freshwater inflow on water quality & nekton communities of the Brazos River estuary, Texas. In Restore America's Estuaries, New Orleans, LA. Poster.

Guillen, G., Oakley, J., Johns, N., and Gordon, M. 2016. Influence of freshwater inflow on the occurrence of water celery and the abundance and health of Atlantic rangia in the Trinity River delta, Galveston Bay, Texas. In Restore America's Estuaries, New Orleans, LA. Poster.

Loe, S., Fazioli, K., and Guillen, G. 2016. Foraging ecology of common bottlenose dolphins (Tursiops truncatus) in Galveston Bay. State of the Bay Symposium, Galveston, TX. Poster.

Loe, S., Fazioli, K., and Guillen, G. 2016. Foraging ecology of common bottlenose dolphins (Tursiops truncatus) in Galveston Bay. Texas Academy of Science Meeting, Junction, TX. Poster.

Mokrech, M., Guillen, G., and Yokley, J. 2016. Low-cost mapping of intertidal reefs using side-scanning sonar and UAV systems. In Restore America's Estuaries, New Orleans, LA. Poster.

Morris, N. and Guillen, G. 2016. Mercury monitoring in the Texas waters of the Gulf of Mexico: a concurrent study with the National Coastal Condition Assessment. State of the Bay Symposium, Galveston, TX. Presentation.

Morris, N. and Guillen, G. 2016. Mercury monitoring in the Texas waters of the Gulf of Mexico: a concurrent study with the National Coastal Condition Assessment. Texas Chapter of the American Fisheries Society, Kerrville, TX. Presentation.

Oakley, J.W., Gordon, M., and Guillen, G. 2016. National Aquatic Resources Surveys: applications for wetland condition monitoring and assessment in Texas. Society of Wetland Scientists, Ramsar Session, Corpus Christi, TX. Invited Presentation.

Oakley, J.W., Lawing, M., Gelwick, F., and Guillen, G. 2016. Developing a coastal health index for Texas waters: moving towards meaningful ecosystem based management. National Monitoring Conference, Tampa, FL. Presentation.

Robertson, J., Curtis, S., Oakley, J., and Guillen, G. 2016. Growth and reproduction of the saltmarsh topminnow (Fundulus jenkinsi). Texas Chapter of the American Fisheries Society, Kerrville, TX. Presentation.

Robertson, J., Curtis, S., Oakley, J., and Guillen, G. 2016. Where them fish at? An overview of the population and habitat characteristics of the saltmarsh topminnow (Fundulus jenkinsi) in Galveston Bay and Sabine Lake. State of the Bay Symposium, Galveston, TX. Presentation.

Zarnstorff, N. and Guillen, G. 2016. Characterization of ambient water quality, soil nutrients, and biological communities in natural and created wetlands of the Texas coast. State of the Bay Symposium, Galveston, TX. Poster.

Zarnstorff, N. and Guillen, G. 2016. Characterization of water quality and associated factors in natural and created wetlands of the Texas coast. Texas Academy of Science Meeting, Junction, TX. Presentation.

2015

Alleman, B. and Guillen, G. 2015. Assessment of habitat and prey availability associated with the distribution of Texas diamond-backed terrapin (Malaclemys terrapin littoralis). Texas Bays and Estuaries Meeting, Port Aransas, TX. Presentation.

Alleman, B. and Guillen, G. 2015. Diet of Texas diamondback terrapin (Malaclemys terrapin littoralis). Texas Academy of Science Meeting, San Antonio, TX. Presentation.

Byrne, R. and Guillen, G. 2015. Influence of recreation on water quality in the San Marcos River. Texas Academy of Science, San Antonio, TX. Poster.

Curtis, S., Oakley, J., Gordon, M., and Guillen, G. 2015. Effects of freshwater inflow and tides on water quality of the Brazos River estuary. Texas Bays & Estuaries Meeting, Port Aransas, TX. Poster.

Curtis, S., Oakley, J., Gordon, M., and Guillen, G. 2015. Influence of instream flow and tides on the water quality of the Brazos River estuary, Texas. American Fisheries Society, Portland, OR. Poster.

Fazioli, K., Mintzer, V., and Guillen, G. 2015. An apparent increase in bottlenose dolphins in upper Galveston Bay: city slickers or tourists? Gulf of Mexico Marine Mammal Research and Monitoring Meeting, New Orleans, LA. Poster.

Fazioli, K., Mintzer, V., and Guillen, G. 2015. Bottlenose dolphin activity in a highly industrialized region of Galveston Bay, Texas. Society for Marine Mammalogy, 21st Biennial Conference on the Biology of Marine Mammals, San Francisco, CA. Poster.

Gordon, M., Metz, T., and Guillen, G. 2015. Relative abundance & distribution of juvenile sea turtles along the mid-lower Texas coast based on directed capture. 2015 Southeast Regional Sea Turtle Meeting, Jekyll Island, GA. Poster.

Loe, S., Fazioli, K., and Guillen, G. 2015. Observations on the occurrence and distribution of bottlenose dolphins (Tursiops truncatus) in upper Galveston Bay. Texas Bays and Estuaries Meeting, Corpus Christi, TX. Poster.

Metz, T., Gordon, M., Anderson, J., and Guillen, G. 2015. Documentation of fibropapillomatosis in green turtles (Chelonia mydas) captured from Texas inshore waters. 2015 Texas Bays and Estuaries Meeting. Port Aransas, TX. Presentation.

Robertson, J., Curtis, S., Oakley, J., and Guillen, G. 2015. Distribution, abundance, and habitat use of the saltmarsh topminnow (Fundulus jenkinsi). Texas Bays and Estuaries Meeting, Port Aransas, Texas. Presentation.

Robertson, J., Oakley, J., Curtis, S., and Guillen, G. 2015. Distribution, abundance, and habitat use of the saltmarsh topminnow (Fundulus jenkinsi). Texas Academy of Science, San Antonio, Texas. Poster.

Robertson, J., Oakley, J., Curtis, S., and Guillen, G. 2015. Distribution, abundance, and habitat use of the saltmarsh topminnow (Fundulus jenkinsi). Texas Chapter of the American Fisheries Society, Tyler, Texas. Poster.

Zarnstorff, N. and Guillen, G. 2015. Characterization of ambient water quality in natural and created wetlands of the Texas coast. Texas Academy of Science Meeting, San Antonio, TX. Poster.

Zarnstorff, N. and Guillen, G. 2015. Characterization of annual ambient water quality in natural and created wetlands of the Texas coast. Texas Bays and Estuaries Meeting, Port Aransas, TX. Poster.

2014

Alleman, B. and Guillen, G. 2014. Characterization of prey availability between Texas diamondback terrapin (Malaclemys terrapin littoralis) capture sites and background wetland densities. Texas Academy of Science Meeting, Galveston, TX. Poster.

Anderson, A., Guillen, G., and Heath, S. 2014. A time activity budget for American oystercatchers (Haematopus palliatus) and the effect of laughing gulls on parental behavior. Meeting of the American Oystercatcher Working Group, Lake Jackson, TX. Presentation.

Anderson, A., Guillen, G., and Heath, S. 2014. A time activity budget for American oystercatchers (Haematopus palliatus) and the factors affecting parental behavior during the incubation and chick rearing periods. Gulf Estuarine Research Society 2014 Biennial Meeting, Port Aransas, TX. Presentation.

Anderson, A., Guillen, G., and Heath, S. 2014. The factors affecting nest and brood survival and chick body condition of American oystercatchers. Meeting of the American Oystercatcher Working Group, Lake Jackson, TX. Presentation.

George, R. and Guillen, G. 2014. Nesting ecology of the Texas diamond-backed terrapin (Malaclemys terrapin littoralis). Gulf Estuarine Research Society 2014 Biennial Meeting, Port Aransas, TX. Presentation.

George, R. and Guillen, G. 2014. Nesting ecology of the Texas diamond-backed terrapin (Malaclemys terrapin littoralis). 1st Meeting of the Texas Diamondback Terrapin Working Group, Port Aransas, TX. Presentation.

George, R. and Guillen, G. 2014. Mapping the nesting habitat of the Texas diamond-backed terrapin: defining areas of potential nesting preference. 20th Annual Student Conference for Research and Creative Arts, Houston, TX. Poster.

George, R. and Guillen, G. 2014. Determination of follicular growth of the Texas diamondback terrapin using ultrasonography. Texas Academy of Science Meeting, Galveston, TX. Poster.

Lane, M., Curtis, S., Oakley, J., and Guillen, G. 2014. Texas lotic fish communities: preliminary analysis of spatial patterns. Texas Academy of Science Meeting, Galveston, TX. Presentation.

Lane, M., Oakley, J.W., Guillen, G., and Curtis, S. 2014. Preliminary analysis of spatial patterns in Texas lotic fish communities. Joint Annual Meeting of the Oklahoma & Texas Chapters American Fisheries Society, Pottsboro, TX. Poster.

Moss, M. and Guillen, G. 2014. Mid-upper coast surveys of Texas diamondback terrapin. 1st Meeting of the Texas Diamondback Terrapin Working Group, Port Aransas, TX. Presentation.

Moss, M., Guillen, G., Alleman, B., and George, R. 2014. Population survey of the Texas diamondback terrapin in San Antonio Bay, Matagorda Bay, and Sabine Lake: preliminary results. Mission-Aransas National Wildlife Refuge Research Symp., Port Aransas,TX. Presentation.

2013

Anderson, A. and Guillen, G. 2013. Measuring life history characteristics and effects of disturbance on the American oystercatcher (Haematopus palliatus) on the upper Texas coast. Meeting of the American Oystercatcher Working Group, Wrightsville Beach, NC. Presentation.

George, R., Alleman, B., and Guillen, G. 2013. Possible effects of salinity on Texas diamondback terrapin (Malaclemys terrapin littoralis) growth. 6th Symposium on Status, Ecology and Conservation of Diamondback Terrapin. Poster.

Oakley, J. 2013. National Rivers and Streams Assessment 2013-2014. 27th Annual SWQM Workshop, Austin, TX. Presentation.

2012

Miller, A. and Guillen, G. 2012. Evaluation of the multi-decadal changes in the nekton community of the lower Brazos River: potential influences of freshwater inflow. In American Fisheries Society, Minneapolis-St. Paul, MN. Presentation.

Oakley, J. 2012. National Wetland Condition Assessment 2011. Environmental Institute of Houston Advisory Board Meeting, Houston, TX. Presentation.

Oakley, J., Guillen, G., Shepard, M., and Vale, K. 2012. Texas Wetland Condition Assessment. In Restore America's Estuaries, Tampa, FL. Poster.

2011

Clarkson, E. and Guillen, G. 2011. Small-scale habitat selection and activity trends of the diamondback terrapin in West Galveston Bay, Texas as determined by acoustic telemetry. In American Society of Ichthyologists and Herpetologists, Minneapolis, MN. Poster.

Marlow, A. and Guillen, G. 2011. Injury rates of diamondback terrapin (Malaclemys terrapin) in Galveston Bay, Texas. In Diamondback Terrapin Working Group. Poster.

Wrast, J. 2011. National Coastal Condition Assessment 2010. Environmental Institute of Houston Spring 2011 Advisory Board Meeting, Houston, TX. Presentation.

Wrast, J., Guillen, G., Mokrech, M., and McCarthy, E. 2011. Development of a habitat suitability index for the Texas diamondback terrapin, Malaclemys terrapin littoralis. In Restore America's Estuaries, Galveston, TX. Poster

2010

Clarkson, E., Marlow, A., and Guillen, G. 2010. Site fidelity and range of an island population of diamondback terrapin (Malaclemys terrapin) in West Galveston Bay, Texas. In Diamondback Terrapin Working Group. Poster.

Guillen, G., Wrast, J., and Ramirez, D. 2010. Construction of river fish community guilds using life history characteristics and multivariate classification methods: case study Trinity River, Texas. In Texas Chapter of the American Fisheries Society, Athens, TX. Poster.

Guillen, G., Wrast, J., Ramirez, D., and Lokanath, P. 2010. Geographic distribution and historical trends of fish species within the Trinity River basin, Texas. In Texas Chapter of the American Fisheries Society, Athens, TX. Poster.

2009

Crossen, D. 2009. Use of dual stable isotope analyses to describe the trophic dynamics of sciaenids in Galveston Bay, Texas. Texas Chapter AFS Conference, Fort worth, TX. Presentation.

Crossen, D., Guillen, G., and Sutton, G. 2009. Nitrogen enrichment in the Galveston Bay estuary indicated by stable isotope analyses. Texas Bays and Estuaries Meeting, Port Aransas, TX. Presentation; 2nd place.

Crossen, D., Guillen, G., and Sutton, G. 2009. Spatial variations in the Galveston Bay estuary indicated by stable isotope analyses. 20th Biennial Conference of the Coastal and Estuarine Research Federation, Portland, OR. Presentation.

Gallaway, A. 2009. A historical perspective of the Dickinson Bayou watershed. 9th Biennial State of the Bay Symposium, Galveston, TX. Presentation.

Guillen, G. 2009. Ecological implications of recent dioxin advisories: potential food web interactions and ecotoxicity. 9th Biennial State of the Bay Symposium, Galveston, TX. Presentation.

Guillen, G., Crossen, D., Wrast, J., and Sutton, G. 2009. Nutrient dynamics in Galveston Bay and potential cycling within the ecosystem as identified by recent stable isotope studies and historical data. Gulf of Mexico Alliance Nutrient Criteria Research Framework Workshop, New Orleans, LA. Presentation.

Guillen, G.J., Haskett, K., Ramirez, D. 2009. Short-term movement and habitat utilization of Texas diamondback terrapin and associated observations on the influence of Hurricane Ike. 20th Biennial Conference of the Coastal and Estuarine Research Federation, Portland, OR. Poster.

Haskett, K. and Guillen, G. 2009. Characterization of the diamondback terrapin population in West Bay (Galveston Bay, Texas). Texas Bays and Estuaries Meeting, Port Aransas, TX.

Ramirez, D., Franks, M., Wrast, J., and Guillen, G. 2009. Fish as possible sources of indicator bacteria in urban streams. Texas Chapter of the American Fisheries Society Meeting, Fort Worth, Texas. Oral Presentation.

Sutton, G. and Guillen, G. 2009. Development of an ecosystem model for Galveston Bay: evaluating the influence of freshwater inflows, nutrient inputs and fisheries. In Ecopath 25 Years Conference Proceedings: Extended Abstracts. Fisheries Centre Research Reports 17(3): 99-100. Fisheries Centre, University of British Columbia. Presentation.

2008

Guillen, G., Ramirez, D., and Crossen, D. 2008. Database development for evaluation of historical trends in fish communities of the Trinity River, TX. Texas Chapter of the American Fisheries Society, Junction, TX. Poster.

Guillen, G., Wrast, J., and Ramirez, D. 2008. Factors affecting water quality in Lake Madeline (Galveston, Texas): implications for design of waterfront communities. Basics of the Basin Research Symposium, New Orleans, LA.

Haskett, K. and Guillen, G. 2008. Population status and demographics of the diamondback terrapin in West Bay (Galveston Bay, Texas). Basics of the Basin Research Symposium, New Orleans, LA.

Ramirez, D. and Guillen, G. 2008. The relationship between environmental characteristics and invasive fish species in oligohaline coastal tributaries of Galveston Bay during summer months. Basics of the Basin Research Symposium, New Orleans, LA.

2007

Haskett, K., Guillen, G., Moore, S., and Biggs, H. 2007. Effects of basin morphology and urban non-point source loading on Lake Madeline water quality. State of the Bay Symposium, Galveston, TX.