# overview
Hormones secreted by the thyroid gland are of primary importance in the regulation of such fundamental physiological processes as growth, nutrient utilization, and reproduction. In my laboratory we examine the regulation of the secretion of thyroid hormones and their actions in poikilothermic vertebrates in order to understand the evolution of thyroid function. We are presently focusing on the regulation on thyroid hormone secretion and the mechanisms of iodine transport in commercially-important fish species such as the red drum (Sciaenops ocellatus), the channel catfish (Ictalurus punctatus), and even the zebrafish (Danio rerio).

This research is aimed at providing new insights into the potentially ancient role of thyroid hormones in nutrient assimilation, as well as elucidating evolutionary trends in the regulation of thyroid function. These studies may serve identify ways in which the pituitary-thyroid axis may be manipulated to enhance aquaculture production or endangered species conservation.

# keywords[]
Intercellular Signaling Peptides And Proteins

# keywords[]
30 Agricultural, Veterinary And Food Sciences

# keywords[]
1.1 Normal Biological Development And Functioning

# keywords[]
1.1 Normal Biological Development And Functioning

# keywords[]
Reverse Transcriptase Polymerase Chain Reaction

# educationAndTraining[].organization.label
University of Alberta - (Edmonton, Alberta, Canada)

# educationAndTraining[].organization.label
University of California, Davis - (Davis, California, United States)

# educationAndTraining[].organization.label
University of California, Berkeley - (Berkeley, California, United States)

# awardsAndHonors[].label
Association of Former Students University-Level Distinguished Achievement Award, The

# awardsAndHonors[].label
Association of Former Students College-Level Teaching Distinguished Achievement Award, The

# awardsAndHonors[].label
Association of Former Students College-Level Teaching Distinguished Achievement Award, The

# publications[].label
The effects of photoperiod and feeding on the diurnal rhythm of circulating thyroid hormones in the red drum, Sciaenops ocellatus.

# publications[].label
SEASONAL PATTERNS OF THYROID-HORMONE PLASMA-PROTEIN BINDING IN THE CHANNEL CATFISH

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Using PET/CT imaging to characterize 18F-fluorodeoxyglucose utilization in fish.

# publications[].label
Expression of the sodium iodide symporter (NIS) in reproductive and neural tissues of teleost fish.

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Cyclic mRNA expression of thyrotropin subunits and deiodinases in red drum, Sciaenops ocellatus.

# publications[].label
BEHAVIORAL AND METABOLIC RESPONSES OF CAPTIVE SEA-TURTLES TO COLD TEMPERATURE

# publications[].label
Regulation of Thyrotropin mRNA Expression in Red Drum, Sciaenops ocellatus

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Effects of dietary arginine on endocrine growth factors of channel catfish, Ictalurus punctatus.

# publications[].label
The effects of fasting and increased feeding on plasma thyroid hormones, glucose, and total protein in sea turtles

# publications[].label
Stimulation of the thyroid gland of a teleost fish, Gillichthys mirabilis, by tetrapod pituitary glycoprotein hormones.

# publications[].label
EFFECTS OF DIETARY-SODIUM CHLORIDE ON RED DRUM JUVENILES IN WATERS OF VARIOUS SALINITIES

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Biomarkers of exposure and effects of environmental contaminants on swallows nesting along the Rio Grande, Texas, USA.

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Biochemical and immunological characterization of pituitary hormones from the ostrich (Struthio camelus).

# publications[].label
ASPECTS OF THYROID PHYSIOLOGY IN LOGGERHEAD SEA-TURTLES, CARETTA-CARETTA

# publications[].label
Glucose delays the insulin-induced increase in thyroid hormone-mediated signaling in adipose of prolong-fasted elephant seal pups.

# publications[].label
Immunological studies with the gonadotropins and their subunits from the green sea turtle Chelonia mydas.

# publications[].label
Endocrine changes during natural spawning in the white sucker, Catostomus commersoni. I. Gonadotropin, growth hormone, and thyroid hormones.

# publications[].label
Purification of thyrotropin from the pituitaries of two turtles: the green sea turtle and the snapping turtle.

# publications[].label
Effects of dietary thyroid hormones on the red drum (Sciaenops ocellatus).

# publications[].label
EFFECTS OF ESTRADIOL ON THYROID-HORMONE PLASMA-PROTEIN BINDING IN THE GOLDFISH

# publications[].label
VITELLOGENIN FROM THE KEMPS RIDLEY SEA-TURTLE

# publications[].label
Characterization of hepatic low-K(m) outer-ring deiodination in red drum (Sciaenops ocellatus).

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Serum thyroid hormone levels in wild and captive sea turtles

# publications[].label
Thyroid Gland Remains Responsive to Thyroid Stimulating Hormone With Fasting Duration

# publications[].label
Central regulation of thyroidal status in a teleost fish: nutrient stimulation of T4 secretion and negative feedback of T3.

# publications[].label
Prolonged food deprivation increases mRNA expression of deiodinase 1 and 2, and thyroid hormone receptor -1 in a fasting-adapted mammal.

# publications[].label
Response of superfused goldfish pituitary fragments to mammalian and salmon gonadotropin-releasing hormones.

# publications[].label
Growth performance, body composition and plasma thyroid hormone status of channel catfish (Ictalurus punctatus) in response to short-term feed deprivation and refeeding

# publications[].label
Osmoregulation in wild and captive West Indian manatees (Trichechus manatus).

# publications[].label
Seasonal changes in the reproductive condition and body composition of free-ranging red drum, Sciaenops ocellatus

# publications[].label
Increased levels of arginine vasotocin and neurophysin during nesting in sea turtles.

# publications[].label
Evidence for expression of the sodium iodide symporter (NIS) in novel neural and ovarian locations in teleost fish

# publications[].label
Estrogen induction of plasma vitellogenin in the Kemp's ridley sea turtle (Lepidochelys kempi).

# publications[].label
A comparison of thyroid hormone receptor gene expression in food-deprived late-stage embryo and juvenile rainbow trout

# publications[].label
High Resolution Functional Imaging of Fish Endocrine Glands and Target Tissues Using Positron Emission Tomography-Computed Tomography

# publications[].label
Thyroid hormone concentrations in captive and free-ranging West Indian manatees (Trichechus manatus).

# publications[].label
Negative feedback regulation of thyrotropin subunits and pituitary deiodinases in red drum, Sciaenops ocellatus.

# publications[].label
SEASONAL-CHANGES IN THYROID AND REPRODUCTIVE STEROID-HORMONES IN FEMALE CHANNEL CATFISH (ICTALURUS-PUNCTATUS) IN POND CULTURE

# publications[].label
Nutrient regulation of endocrine function in fish

# publications[].label
Seasonal changes in channel catfish thyroid hormones reflect increased magnitude of daily thyroid hormone cycles

# publications[].label
Thyrotropin from amphibian (Rana catesbeiana) pituitaries and evidence for heterothyrotropic activity of bullfrog luteinizing hormone in reptiles.

# publications[].label
Simulated hibernation of sea turtles in the laboratory: I. Feeding, breathing frequency, blood pH, and blood gases.

# publications[].label
Chemotaxis of Escherichia coli to norepinephrine (NE) requires conversion of NE to 3,4-dihydroxymandelic acid.

# publications[].label
The effects of photoperiod on growth rate and circulating thyroid hormone levels in the red drum, Sciaenops ocellatus: evidence for a free-running circadian rhythm of T(4) secretion.

# publications[].label
Effects of dopamine and norepinephrine on in vitro spontaneous and gonadotropin-releasing hormone-induced gonadotropin release by dispersed cells or fragments of the goldfish pituitary.

# publications[].label
Seasonal reproductive cycle of the Kemp's ridley sea turtle (Lepidochelys kempi).

# publications[].label
In vivo thyroxine release in day-old cockerels in response to acute stimulation by mammalian and avian pituitary hormones.

# publications[].label
Endocrine changes during natural spawning in the white sucker, Catostomus commersoni. II. Steroid hormones.

# publications[].label
Increased gonadotropin levels in goldfish do not result in alterations in circulating thyroid hormone levels.

# publications[].label
Comparative endocrinology: hormones and reproduction in fishes, amphibians, and reptiles.

# publications[].publisher
American Association for the Advancement of Science (AAAS)

# publications[].label
Androgens and female intrasexual aggression in the sex-role reversed Gulf pipefish

# publications[].label
PLASMA THYROID-HORMONE LEVELS DURING INDUCED AND SPONTANEOUS OVULATION IN THE GOLDFISH (CARASSIUS-AURATUS)

# publications[].label
THYROID-HORMONE BINDING TO SERUM-PROTEINS IN SEA-TURTLES

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CHANGES IN THE PLASMA-CONCENTRATION OF ARGININE VASOTOCIN DURING OVIPOSITION IN SEA-TURTLES

# publications[].label
Seasonality in plasma thyroxine in the desert tortoise, Gopherus agassizii.

# publications[].label
Glucose infusion increases mRNA expression of deiodinase 1 & 2, and thyroid hormone receptor 1 in a fastingadapted mammal (1101.12)

# publications[].label
Thyrotropic activity of recombinant human glycoprotein hormone analogs and pituitary mammalian gonadotropins in goldfish (Carassius auratus): insights into the evolution of thyrotropin receptor specificity.

# publications[].label
Reproductive Biology of Atlantic Leatherback Sea Turtles at Sandy Point, St. Croix: The First 30 Years

# publications[].publisher
Chelonian Conservation and Biology Journal

# publications[].label
Annual cycles in levels of pituitary and plasma gonadotropin, gonadal steroids, and thyroid activity in the Chinese cobra (Naja naja).

# publications[].label
Effect of fasting on thyroid hormone levels, and TR(alpha) and TR(beta) mRNA accumulation in late-stage embryo and juvenile rainbow trout, Oncorhynchus mykiss.

# publications[].label
Molecular cloning and regulation of mRNA expression of the thyrotropin  and glycoprotein hormone  subunits in red drum, Sciaenops ocellatus.

# publications[].label
Dietary effects on thyroid hormones in the red drum, Sciaenops ocellatus.

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Basal and stress-induced corticosterone levels in olive ridley sea turtles (Lepidochelys olivacea) in relation to their mass nesting behavior.

# publications[].label
Studies on the specificity of thyroid response to pituitary glycoprotein hormones.

# streetAddress
Texas A&M University; Biology; 3258 TAMU

# etdChairOf[].label
Jones, Richard Alan (2012-08). Regulation of Thyrotropin mRNA Expression in Red Drum, Sciaenops ocellatus. Doctoral Dissertation.

# etdChairOf[].label
Crawford, Jared Louis (2003-12). Seasonal variation in thyroxine in the American alligator (Alligator mississippiensis). Master's Thesis.

# etdChairOf[].label
Thronson, Amanda Mae (2008-12). Effect of variation in freshwater inflow on phytoplankton productivity and community composition in galveston bay, texas. Master's Thesis.

# etdChairOf[].label
Garner, Jeanne (2012-05). Reproductive Endocrinology of Nesting Leatherback Sea Turtles in St. Croix, U.S. Virgin Islands. Doctoral Dissertation.

# etdChairOf[].label
Romney, Sherdina Ericia (2017-05). A Species’ Trait Based Approach to Climate Change Vulnerability Assessment in North Sea Fisheries Species. Master's Thesis.

# etdChairOf[].label
Miller, Thomas Charles (2011-05). Biological Activity of Thyrotropin in Two Teleost Fish, Red Drum (Sciaenops ocellatus) and Goldfish (Carassius auratus). Doctoral Dissertation.