Reynaldo Patino, PhD
Unit Leader - Texas Cooperative Fish and Wildlife Research Unit
Research Interests
Reynaldo has 30+ years of research experience with the biology and management of fishes and amphibians. Topics of current interest include reproductive and developmental biology; impacts of environmental stressors, such as contaminants and climate change, on health and reproductive fitness; and relationships between water quality and aquatic habitat quality, including harmful algal blooms.
Teaching Interests
Reynaldo has taught courses in aquatic and animal ecophysiology and aquaculture.
Professional Experience
Unit Leader, Texas Cooperative Fish and Wildlife Research Unit, 1989-
Education and Certifications
Ph D Oregon State University 1988
MS Oregon State University 1983
BS Tokyo University of Fisheries 1980
Science and Products
Filter Total Items: 51
Assessing the risk of dreissenid mussel invasion in Texas based on lake physical characteristics and potential for downstream dispersal
ebra mussels (Dreissena polymorpha) and quagga mussels (Dreissena bugensis) were likely introduced from Ponto-Caspian Eurasia to the Laurentian Great Lakes inadvertently via ballast water release in the 1980s and have since spread across the US, including Texas. Their spread into the state, including reservoirs in both Brazos River and Colorado River basins, has resulted in a need to delimit suita
Authors
Matthew A Barnes, Reynaldo Patiño
Growth-suppressing and algicidal properties of an extract from Arundo donax, an invasive riparian plant, against Prymnesium parvum, an invasive harmful alga
This study examined the ability of acidic and neutral/alkaline fractions of a methanolic extract from giant reed (Arundo donax) and of two of its constituents, gramine and skatole, to inhibit growth of the ichthyotoxic golden alga (Prymnesium parvum) in batch culture. For this study, growth suppression was defined as inhibition of maximum cell density, algicidal activity as early occurrence of neg
Authors
Reynaldo Patiño, Rakib H. Rashel, Amede Rubio, Scott Longing
Influence of genetic background, salinity, and inoculum size on growth of the ichthyotoxic golden alga (Prymnesium parvum)
Salinity (5–30) effects on golden alga growth were determined at a standard laboratory temperature (22 °C) and one associated with natural blooms (13 °C). Inoculum-size effects were determined over a wide size range (100–100,000 cells ml−1). A strain widely distributed in the USA, UTEX-2797 was the primary study subject but another of limited distribution, UTEX-995 was used to evaluate growth resp
Authors
Rakib H. Rashel, Reynaldo Patiño
Effects of thyroid endocrine manipulation on sex-related gene expression and population sex ratios in Zebrafish
Thyroid hormone reportedly induces masculinization of genetic females and goitrogen treatment delays testicular differentiation (ovary-to-testis transformation) in genetic males of Zebrafish. This study explored potential molecular mechanisms of these phenomena. Zebrafish were treated with thyroxine (T4, 2 nM), goitrogen [methimazole (MZ), 0.15 mM], MZ (0.15 mM) and T4 (2 nM) (rescue treatment), o
Authors
Prakash Sharma, Song Tang, Gregory D. Mayer, Reynaldo Patiño
Thyroid endocrine disruption and external body morphology of Zebrafish
This study examined the effects thyroid-active compounds during early development on body morphology of Zebrafish (Danio rerio). Three-day postfertilization (dpf) larvae were exposed to goitrogen [methimazole (MZ, 0.15 mM)], combination of MZ (0.15 mM) and thyroxine (T4, 2 nM), T4 (2 nM), or control (reconstituted water) treatments until 33 dpf and subsequently maintained in reconstituted water un
Authors
Prakash Sharma, Timothy B. Grabowski, Reynaldo Patiño
Predicting the risk of toxic blooms of golden alga from cell abundance and environmental covariates
Golden alga (Prymnesium parvum) is a toxic haptophyte that has caused considerable ecological damage to marine and inland aquatic ecosystems worldwide. Studies focused primarily on laboratory cultures have indicated that toxicity is poorly correlated with the abundance of golden alga cells. This relationship, however, has not been rigorously evaluated in the field where environmental conditions ar
Authors
Reynaldo Patiño, Matthew M. VanLandeghem, Shawn Denny
Long-term trends in reservoir water quality and quantity in two major river basins of the southern Great Plains
Trends in water quality and quantity were assessed for 11 major reservoirs of the Brazos and Colorado river basins in the southern Great Plains (maximum period of record, 1965–2010). Water quality, major contributing-stream inflow, storage, local precipitation, and basin-wide total water withdrawals were analyzed. Inflow and storage decreased and total phosphorus increased in most reservoirs. The
Authors
D. Dawson, Matthew M. VanLandeghem, William H. Asquith, Reynaldo Patiño
Reproductive traits of shovelnose sturgeon Scaphirhynchus platorynchus (Rafinesque, 1820) in the lower Platte River, Nebraska
We assessed reproductive status, fecundity, egg size, and spawning dynamics of shovelnose sturgeon Scaphirhynchus platorynchus in the lower Platte River. Shovelnose sturgeon were captured throughout each year during 2011 and 2012 using a multi-gear approach designed to collect a variety of fish of varying sizes and ages. Fish were collected monthly for a laboratory assessment of reproductive condi
Authors
M. J. Hamel, M.L. Rugg, M.A. Pegg, Reynaldo Patiño, J.J. Hammen
Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA
Adult male Common Carp were sampled in 2007/08 over a full reproductive cycle at Lake Mead National Recreation Area. Sites sampled included a stream dominated by treated wastewater effluent, a lake basin receiving the streamflow, an upstream lake basin (reference), and a site below Hoover Dam. Individual body burdens for 252 contaminants were measured, and biological variables assessed included ph
Authors
Reynaldo Patiño, Matthew M. VanLandeghem, Steven L. Goodbred, Erik Orsak, Jill A. Jenkins, Kathy R. Echols, Michael R. Rosen, Leticia Torres
Climate-water quality relationships in Texas reservoirs
Water temperature, dissolved oxygen, and concentrations of salts in surface water bodies can be affected by the natural environment, local human activities such as surface and ground water withdrawals, land use, and energy extraction, and variability and long-term trends in atmospheric conditions including temperature and precipitation. Here, we quantify the relationship between 121 indicators of
Authors
Rodica Gelca, Katharine Hayhoe, Ian Scott-Fleming, Caleb Crow, D. Dawson, Reynaldo Patiño
A chronicle of a killer alga in the west: Ecology, assessment, and management of Prymnesium parvum blooms
Since the mid-1980s, fish-killing blooms of Prymnesium parvum spread throughout the USA. In the south central USA, P. parvum blooms have commonly spanned hundreds of kilometers. There is much evidence that physiological stress brought on by inorganic nutrient limitation enhances toxicity. Other factors influence toxin production as well, such as stress experienced at low salinity and temperature.
Authors
D. L. Roelke, Aaron Barkoh, Bryan W. Brooks, J. P. Grover, K. D. Hambright, John W. LaClaire, Peter D. R. Moeller, Reynaldo Patiño
Associations between water physicochemistry and Prymnesium parvum presence, abundance, and toxicity in west Texas reservoirs
Toxic blooms of golden alga (Prymnesium parvum) have caused substantial ecological and economic harm in freshwater and marine systems throughout the world. In North America, toxic blooms have impacted freshwater systems including large reservoirs. Management of water chemistry is one proposed option for golden alga control in these systems. The main objective of this study was to assess physicoche
Authors
Matthew M. VanLandeghem, Mukhtar Farooqi, Greg M. Southard, Reynaldo Patiño
Science and Products
Filter Total Items: 51
Assessing the risk of dreissenid mussel invasion in Texas based on lake physical characteristics and potential for downstream dispersal
ebra mussels (Dreissena polymorpha) and quagga mussels (Dreissena bugensis) were likely introduced from Ponto-Caspian Eurasia to the Laurentian Great Lakes inadvertently via ballast water release in the 1980s and have since spread across the US, including Texas. Their spread into the state, including reservoirs in both Brazos River and Colorado River basins, has resulted in a need to delimit suita
Authors
Matthew A Barnes, Reynaldo Patiño
Growth-suppressing and algicidal properties of an extract from Arundo donax, an invasive riparian plant, against Prymnesium parvum, an invasive harmful alga
This study examined the ability of acidic and neutral/alkaline fractions of a methanolic extract from giant reed (Arundo donax) and of two of its constituents, gramine and skatole, to inhibit growth of the ichthyotoxic golden alga (Prymnesium parvum) in batch culture. For this study, growth suppression was defined as inhibition of maximum cell density, algicidal activity as early occurrence of neg
Authors
Reynaldo Patiño, Rakib H. Rashel, Amede Rubio, Scott Longing
Influence of genetic background, salinity, and inoculum size on growth of the ichthyotoxic golden alga (Prymnesium parvum)
Salinity (5–30) effects on golden alga growth were determined at a standard laboratory temperature (22 °C) and one associated with natural blooms (13 °C). Inoculum-size effects were determined over a wide size range (100–100,000 cells ml−1). A strain widely distributed in the USA, UTEX-2797 was the primary study subject but another of limited distribution, UTEX-995 was used to evaluate growth resp
Authors
Rakib H. Rashel, Reynaldo Patiño
Effects of thyroid endocrine manipulation on sex-related gene expression and population sex ratios in Zebrafish
Thyroid hormone reportedly induces masculinization of genetic females and goitrogen treatment delays testicular differentiation (ovary-to-testis transformation) in genetic males of Zebrafish. This study explored potential molecular mechanisms of these phenomena. Zebrafish were treated with thyroxine (T4, 2 nM), goitrogen [methimazole (MZ), 0.15 mM], MZ (0.15 mM) and T4 (2 nM) (rescue treatment), o
Authors
Prakash Sharma, Song Tang, Gregory D. Mayer, Reynaldo Patiño
Thyroid endocrine disruption and external body morphology of Zebrafish
This study examined the effects thyroid-active compounds during early development on body morphology of Zebrafish (Danio rerio). Three-day postfertilization (dpf) larvae were exposed to goitrogen [methimazole (MZ, 0.15 mM)], combination of MZ (0.15 mM) and thyroxine (T4, 2 nM), T4 (2 nM), or control (reconstituted water) treatments until 33 dpf and subsequently maintained in reconstituted water un
Authors
Prakash Sharma, Timothy B. Grabowski, Reynaldo Patiño
Predicting the risk of toxic blooms of golden alga from cell abundance and environmental covariates
Golden alga (Prymnesium parvum) is a toxic haptophyte that has caused considerable ecological damage to marine and inland aquatic ecosystems worldwide. Studies focused primarily on laboratory cultures have indicated that toxicity is poorly correlated with the abundance of golden alga cells. This relationship, however, has not been rigorously evaluated in the field where environmental conditions ar
Authors
Reynaldo Patiño, Matthew M. VanLandeghem, Shawn Denny
Long-term trends in reservoir water quality and quantity in two major river basins of the southern Great Plains
Trends in water quality and quantity were assessed for 11 major reservoirs of the Brazos and Colorado river basins in the southern Great Plains (maximum period of record, 1965–2010). Water quality, major contributing-stream inflow, storage, local precipitation, and basin-wide total water withdrawals were analyzed. Inflow and storage decreased and total phosphorus increased in most reservoirs. The
Authors
D. Dawson, Matthew M. VanLandeghem, William H. Asquith, Reynaldo Patiño
Reproductive traits of shovelnose sturgeon Scaphirhynchus platorynchus (Rafinesque, 1820) in the lower Platte River, Nebraska
We assessed reproductive status, fecundity, egg size, and spawning dynamics of shovelnose sturgeon Scaphirhynchus platorynchus in the lower Platte River. Shovelnose sturgeon were captured throughout each year during 2011 and 2012 using a multi-gear approach designed to collect a variety of fish of varying sizes and ages. Fish were collected monthly for a laboratory assessment of reproductive condi
Authors
M. J. Hamel, M.L. Rugg, M.A. Pegg, Reynaldo Patiño, J.J. Hammen
Novel associations between contaminant body burdens and biomarkers of reproductive condition in male Common Carp along multiple gradients of contaminant exposure in Lake Mead National Recreation Area, USA
Adult male Common Carp were sampled in 2007/08 over a full reproductive cycle at Lake Mead National Recreation Area. Sites sampled included a stream dominated by treated wastewater effluent, a lake basin receiving the streamflow, an upstream lake basin (reference), and a site below Hoover Dam. Individual body burdens for 252 contaminants were measured, and biological variables assessed included ph
Authors
Reynaldo Patiño, Matthew M. VanLandeghem, Steven L. Goodbred, Erik Orsak, Jill A. Jenkins, Kathy R. Echols, Michael R. Rosen, Leticia Torres
Climate-water quality relationships in Texas reservoirs
Water temperature, dissolved oxygen, and concentrations of salts in surface water bodies can be affected by the natural environment, local human activities such as surface and ground water withdrawals, land use, and energy extraction, and variability and long-term trends in atmospheric conditions including temperature and precipitation. Here, we quantify the relationship between 121 indicators of
Authors
Rodica Gelca, Katharine Hayhoe, Ian Scott-Fleming, Caleb Crow, D. Dawson, Reynaldo Patiño
A chronicle of a killer alga in the west: Ecology, assessment, and management of Prymnesium parvum blooms
Since the mid-1980s, fish-killing blooms of Prymnesium parvum spread throughout the USA. In the south central USA, P. parvum blooms have commonly spanned hundreds of kilometers. There is much evidence that physiological stress brought on by inorganic nutrient limitation enhances toxicity. Other factors influence toxin production as well, such as stress experienced at low salinity and temperature.
Authors
D. L. Roelke, Aaron Barkoh, Bryan W. Brooks, J. P. Grover, K. D. Hambright, John W. LaClaire, Peter D. R. Moeller, Reynaldo Patiño
Associations between water physicochemistry and Prymnesium parvum presence, abundance, and toxicity in west Texas reservoirs
Toxic blooms of golden alga (Prymnesium parvum) have caused substantial ecological and economic harm in freshwater and marine systems throughout the world. In North America, toxic blooms have impacted freshwater systems including large reservoirs. Management of water chemistry is one proposed option for golden alga control in these systems. The main objective of this study was to assess physicoche
Authors
Matthew M. VanLandeghem, Mukhtar Farooqi, Greg M. Southard, Reynaldo Patiño