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Thomas Siopes

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TOP 3
Thomas Siopes; James R Millam; M Q Steinman
Initiating egg production in turkey breeder hens: thyroid hormone involvement.
Thomas Siopes
Initiation of egg production by turkey breeder hens: sexual maturation and age at lighting.
Thomas Siopes; Herbert Underwood
Diurnal variation in the cellular and humoral immune responses of Japanese quail: role of melatonin.

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All Publications

2010: Thomas Siopes; James R Millam; M Q Steinman
Initiating egg production in turkey breeder hens: thyroid hormone involvement.
Poultry science 2010;89(10):2265-72.
2010: Thomas Siopes
Initiation of egg production by turkey breeder hens: sexual maturation and age at lighting.
Poultry science 2010;89(7):1490-6.
2008: Thomas Siopes; Herbert Underwood
Diurnal variation in the cellular and humoral immune responses of Japanese quail: role of melatonin.
General and comparative endocrinology 2008;158(3):245-9.
2007: Thomas Siopes
Lighting for summer egg production by turkeys: day length and light intensity.
Poultry science 2007;86(11):2413-9.
2006: John A Proudman; Thomas Siopes
Potential role of thyroid hormones and prolactin in the programming of photorefractoriness in turkey hens.
Poultry science 2006;85(8):1457-61.
2006: Christopher T Steele; Gianluca Tosini; Thomas Siopes; Herbert Underwood
Time keeping by the quail's eye: circadian regulation of melatonin production.
General and comparative endocrinology 2006;145(3):232-6.
2005: Thomas Siopes
Spontaneous recovery of photosensitivity by turkey breeder hens given prolonged exposure to long day lengths.
Poultry science 2005;84(9):1470-6.
2005: Christopher B Moore; Thomas Siopes
Enhancement of cellular and humoral immunity following embryonic exposure to melatonin in turkeys (Meleagris gallopavo).
General and comparative endocrinology 2005;143(2):178-83.
2005: John A Proudman; Thomas Siopes
Thyroid hormone and prolactin profiles in male and female turkeys following photostimulation.
Poultry science 2005;84(6):942-6.
2004: John A Proudman; Thomas Siopes
Effect of a single short-term reduction in photoperiod on photorefractoriness in turkey hens.
Poultry science 2004;83(7):1199-202.
2004: Christopher B Moore; Thomas Siopes
Spontaneous ovarian adenocarcinoma in the domestic turkey breeder hen (Meleagris gallopavo): effects of photoperiod and melatonin.
Neuro endocrinology letters 2004;25(1-2):94-101.
2003: Thomas Siopes; John A Proudman
Photoresponsiveness of turkey breeder hens changes during the egg-laying season: relative and absolute photorefractoriness.
Poultry science 2003;82(6):1042-8.
2003: Christopher B Moore; Thomas Siopes
Melatonin enhances cellular and humoral immune responses in the Japanese quail (Coturnix coturnix japonica) via an opiatergic mechanism.
General and comparative endocrinology 2003;131(3):258-63.
2003: Christopher B Moore; Thomas Siopes
Immune function in turkey breeder hens during the short day prelighting period and renewal of photosensitivity for egg production.
Poultry science 2003;82(1):150-4.
2003: Christopher T Steele; Bora D Zivkovic; Thomas Siopes; Herbert Underwood
Ocular clocks are tightly coupled and act as pacemakers in the circadian system of Japanese quail.
American journal of physiology. Regulatory, integrative and comparative physiology 2003;284(1):R208-18.
2002: Christopher B Moore; Thomas Siopes
Effect of melatonin supplementation on the ontogeny of immunity in the Large White turkey poult.
Poultry science 2002;81(12):1898-903.
2002: Christopher B Moore; Thomas Siopes
Melatonin can produce immunoenhancement in Japanese quail (Coturnix coturnix japonica) without prior immunosuppression.
General and comparative endocrinology 2002;129(2):122-6.
2002: Thomas Siopes
Circulating thyroid hormone levels in recycled turkey breeder hens during a short day prelighting period and renewal of photosensitivity for egg production.
Poultry science 2002;81(9):1342-6.
2002: John A Proudman; Thomas Siopes
Relative and absolute photorefractoriness in turkey hens: profiles of prolactin, thyroxine, and triiodothyronine early in the reproductive cycle.
Poultry science 2002;81(8):1218-23.
2002: Christopher B Moore; Thomas Siopes; Christopher T Steele; Herbert Underwood
Pineal melatonin secretion, but not ocular melatonin secretion, is sufficient to maintain normal immune responses in Japanese quail (Coturnix coturnix japonica).
General and comparative endocrinology 2002;126(3):352-8.
2002: Thomas Siopes
Photorefractoriness in turkey breeder hens is affected by age and season.
Poultry science 2002;81(5):689-94.
2001: Thomas Siopes
Temporal characteristics and incidence of photorefractoriness in turkey hens.
Poultry science 2001;80(1):95-100.
2000: Christopher B Moore; Thomas Siopes
Effects of lighting conditions and melatonin supplementation on the cellular and humoral immune responses in Japanese quail Coturnix coturnix japonica.
General and comparative endocrinology 2000;119(1):95-104.
2000: Bora D Zivkovic; Herbert Underwood; Thomas Siopes
Circadian ovulatory rhythms in Japanese quail: role of ocular and extraocular pacemakers.
Journal of biological rhythms 2000;15(2):172-83.
1999: Thomas Siopes
Intermittent lighting increases egg weight and facilitates early photostimulation of turkey breeder hens.
Poultry science 1999;78(7):1040-3.
1999: J A Knowlton; Thomas Siopes; ML Rhoads; John D Kirby
Effects of transient treatment with 6-N-propyl-2-thiouracil on testis development and function in breeder turkeys.
Poultry science 1999;78(7):999-1005.
1999: Thomas Siopes
Improved effectiveness of artificial insemination of turkey hens associated with ahemeral light-dark cycles and age at photostimulation.
Poultry science 1999;78(6):902-5.
1999: Thomas Siopes; ER Neely
Ahemeral lighting of turkey breeder hens. 3. Temporary application and early age at lighting.
Poultry science 1999;78(3):387-91.
1998: Thomas Siopes
Absence of a seasonal effect on the critical day length for photorefractoriness in turkey breeder hens.
Poultry science 1998;77(1):145-9.
1997: Thomas Siopes; ER Neely
Ahemeral lighting of turkey breeder hens. 2. Early age at lighting and reproductive performance.
Poultry science 1997;76(12):1783-8.
1997: Thomas Siopes
Transient hypothyroidism reinitiates egg laying in turkey breeder hens: termination of photorefractoriness by propylthiouracil.
Poultry science 1997;76(12):1776-82.
1997: Thomas Siopes; ER Neely
Ahemeral lighting of turkey breeder hens. 1. Cycle length effects on egg production and egg characteristics.
Poultry science 1997;76(5):761-6.
1997: Herbert Underwood; Thomas Siopes; K Edmonds
Eye and gonad: role in the dual-oscillator circadian system of female Japanese quail.
The American journal of physiology 1997;272(1 Pt 2):R172-82.
1995: Thomas Siopes
Turkey breeder hen performance by strain during consecutive lay periods.
Poultry science 1995;74(8):1269-79.
1995: Thomas Siopes
Incidence of prelay squatting behavior is not related to subsequent egg laying in turkey breeder hens.
Poultry science 1995;74(6):1039-43.
1995: James S Guy; Thomas Siopes; H John Barnes; Lynda G Smith; W H Emory
Experimental transmission of eastern equine encephalitis virus and Highlands J virus via semen of infected tom turkeys.
Avian diseases 1995;39(2):337-42.
1994: Thomas Siopes
Critical day lengths for egg production and photorefractoriness in the domestic turkey.
Poultry science 1994;73(12):1906-13.
1994: R P Scott; Thomas Siopes
Light color: effect on blood cells, immune function and stress status in turkey hens.
Comparative biochemistry and physiology. Comparative physiology 1994;108(2-3):161-8.
1994: R P Scott; Thomas Siopes
Evaluation of cell-mediated immunocompetence in mature turkey breeder hens using a dewlap skin test.
Avian diseases 1994;38(1):161-4.
1993: R J Lien; Thomas Siopes
Effects of short-term thyroxine administration during the laying period on egg production and moulting by turkeys.
British poultry science 1993;34(2):405-16.
1993: R J Lien; Thomas Siopes
The relationship of plasma thyroid hormone and prolactin concentrations to egg laying, incubation behavior, and molting by female turkeys exposed to a one-year natural daylength cycle.
General and comparative endocrinology 1993;90(2):205-13.
1993: Thomas Siopes; G R Baughman; CR Parkhurst
Photoperiod and seasonal influences on the growth of turkey hens.
British poultry science 1993;34(1):43-51.
1992: Thomas Siopes
Effects of age at lighting on reproduction of turkey hens.
Poultry science 1992;71(12):2099-105.
1992: Thomas Siopes
Effect of light intensity level during prelay light restriction on subsequent reproductive performance of turkey breeder hens.
Poultry science 1992;71(6):939-44.
1991: Thomas Siopes
Light intensity effects on reproductive performance of turkey breeder hens.
Poultry science 1991;70(10):2049-54.
1991: R J Lien; Thomas Siopes
Influence of thyroidectomy on reproductive responses of male domestic turkeys (Meleagris gallopavo).
British poultry science 1991;32(2):405-15.
1990: Thomas Siopes; R Pyrzak
Effect of intermittent lighting on the reproductive performance of first-year and recycled turkey hens.
Poultry science 1990;69(1):142-9.
1990: Herbert Underwood; R K Barrett; Thomas Siopes
Melatonin does not link the eyes to the rest of the circadian system in quail: a neural pathway is involved.
Journal of biological rhythms 1990;5(4):349-61.
1990: Herbert Underwood; R K Barrett; Thomas Siopes
The quail's eye: a biological clock.
Journal of biological rhythms 1990;5(3):257-65.
1989: Thomas Siopes; G R Baughman; CR Parkhurst; M B Timmons
Relationship between duration and intensity of environmental light on the growth performance of male turkeys.
Poultry science 1989;68(11):1428-35.
1989: R J Lien; Thomas Siopes
Turkey plasma thyroid hormone and prolactin concentrations throughout an egg laying cycle and in relation to photorefractoriness.
Poultry science 1989;68(10):1409-17.
1989: Thomas Siopes
Prelay light restriction of turkey hens: daylength versus exposure time.
Poultry science 1989;68(10):1337-41.
1989: R J Lien; Thomas Siopes
Effects of thyroidectomy on egg production, molt, and plasma thyroid hormone concentrations of turkey hens.
Poultry science 1989;68(8):1126-32.
1989: G S Davis; Thomas Siopes
Relationship between plasma corticosterone levels and poult mortality and the effects of feeding corticosterone on poult performance.
Poultry science 1989;68(7):880-4.
1989: G S Davis; Thomas Siopes
The absence of sex and age effects on the corticosterone response of turkey poults to adrenocorticotropic hormone and temperature stressors.
Poultry science 1989;68(6):846-9.
1989: R Pyrzak; Thomas Siopes
Characteristics of oviposition patterns of turkey hens and the influence of different wavelengths of light.
British poultry science 1989;30(1):151-60.
1989: G S Davis; Thomas Siopes
Ontogeny of daily rhythmicity in plasma corticosterone and variation in sensitivity of the corticosterone response in turkey poults.
Poultry science 1989;68(3):423-7.
1989: Thomas Siopes; M E el Halawani
Pineal and ocular influences on male and female turkeys: plasma luteinizing hormone and prolactin levels during gonadal development.
General and comparative endocrinology 1989;73(2):284-92.
1988: Herbert Underwood; Thomas Siopes; R K Barrett
Does a biological clock reside in the eye of quail?
Journal of biological rhythms 1988;3(4):323-31.
1987: G S Davis; Thomas Siopes
Plasma corticosterone response of turkeys to adrenocorticotropic hormone: age, dose, and route of administration effects.
Poultry science 1987;66(10):1727-32.
1986: Thomas Siopes; CR Parkhurst; G R Baughman
Intermittent light and growth performance of male turkeys from 2 to 22 weeks of age.
Poultry science 1986;65(12):2221-5.
1985: Herbert Underwood; Thomas Siopes
Melatonin rhythms in quail: regulation by photoperiod and circadian pacemakers.
Journal of pineal research 1985;2(2):133-43.
1984: Herbert Underwood; Thomas Siopes
Circadian organization in Japanese quail.
The Journal of experimental zoology 1984;232(3):557-66.
1984: Herbert Underwood; S Binkley; Thomas Siopes; K Mosher
Melatonin rhythms in the eyes, pineal bodies, and blood of Japanese quail (Coturnix coturnix japonica).
General and comparative endocrinology 1984;56(1):70-81.
1984: Thomas Siopes; M B Timmons; G R Baughman; CR Parkhurst
The effects of light intensity on turkey poult performance, eye morphology, and adrenal weight.
Poultry science 1984;63(5):904-9.
1983: Thomas Siopes; M B Timmons; G R Baughman; CR Parkhurst
The effect of light intensity on turkey poult eye morphology.
Poultry science 1983;62(12):2486-8.
1983: Thomas Siopes; M B Timmons; G R Baughman; CR Parkhurst
The effect of light intensity on the growth performance of male turkeys.
Poultry science 1983;62(12):2336-42.