J. D. Armstrong

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The effect of intragastric transmitters on feeding behaviour of Atlantic salmon, Salmo salar; parr during autumn

J. D. Armstrong, C. Rawlings, 1993 .

Seasonal differences in function of the hypothalamic\p=m-\hypophysial\p=m-\ovarian axis in weaned primiparous sows

Armstrong, J. D. Armstrong, J. Britt, 2008 .

Changes in the hypothalamic-hypophyseal-ovarian axis of primiparous sows following weaning or pulsatile gonadotropin releasing homrone administration and weaning.

J. D. Armstrong, J. Britt, N. M. Cox, 1987, Theriogenology.

Effect of restriction of energy during lactation on body condition, energy metabolism, endocrine changes and reproductive performance in primiparous sows.

R. Kraeling, J. D. Armstrong, J. Britt, 1986, Journal of animal science.

A combined radio and acoustic transmitter for fixing direction and range of freshwater fish (RAFIX)

J. Armstrong, I. Priede, L. D. Vera, 1988 .

Influence of follicular ablation during lactation on postweaning interval to estrus, ovulation rate, and endocrine function in sows.

J. D. Armstrong, J. Britt, N. M. Cox, 1987, Domestic animal endocrinology.

concentrations of growth hormone and insulin-like growth factor 1 Active immunization of pigs against growth hormone-releasing factor: effect on

J. Johnson, J. D. Armstrong, A. Felix, 2011 .

An acoustic telemetry system for monitoring the heart rate of pike, Esox lucius L., and other fish in their natural environment.

I. Priede, M. Lucas, J. D. Armstrong, 1989, The Journal of experimental biology.

Effect of daily replacement therapy with recombinant bovine somatotropin on somatotropin, insulin-like growth factor I, and onset of puberty in beef heifers immunized against growth hormone-releasing factor.

R. Campbell, G. Hartnell, R. Harvey, 1994, Journal of animal science.

Concentrations of hormones and metabolites, estimates of metabolism, performance, and reproductive performance of sows actively immunized against growth hormone-releasing factor.

R. Campbell, J. D. Armstrong, E. Heimer, 1994, Journal of animal science.

Dietary zinc affects serum concentrations of insulin and insulin-like growth factor I in growing lambs.

J. D. Armstrong, E. Kegley, J. Spears, 1993, The Journal of nutrition.

Effect of somatotropin and/or equine chorionic gonadotropin on serum and follicular insulin-like growth factor I and insulin-like growth factor binding proteins in cattle.

D. Clemmons, R. Harvey, J. D. Armstrong, 1994, Biology of reproduction.

Circannual changes in immune function.

J. D. Armstrong, L. Bozzetti, J. Macmurray, 1983, Life sciences.

Endocrine events prior to puberty in heifers: role of somatotropin, insulin-like growth factor-I and insulin-like growth factor binding proteins.

R. Campbell, D. Clemmons, R. Harvey, 1992, Journal of physiology and pharmacology : an official journal of the Polish Physiological Society.

EFFECT OF FEED RESTRICTION ON SERUM SOMATOTROPIN , INSUUN-UKE GROWTH FACTOR-I-( lGF-I ) AND IGF BINDING PROTEINS IN CYCUC HEIFERS ACTIVELY IMMUNIZED AGAINST GROWTH HORMONE RELEASING FACTOR 1

A. Campbell, J. D. Armstrong, E. Heimer, 2011 .

Feedlot Perfomance , Carcass Characteristics , Hormones , and Metabolites in Steers Actively Immunized Against Growth Hormone-Releasing Factor '

R. Campbell, R. Harvey, J. D. Armstrong, 2002 .

Changes in serum somatotropin, somatotropin mRNA, and serum and follicular insulin-like growth factor-I in response to feed restriction in cows actively immunized against growth hormone-releasing factor.

R. Campbell, R. Harvey, J. D. Armstrong, 1993, Journal of animal science.

Effect of prepartum administration of growth hormone-releasing factor on somatotropin, insulin-like growth factor I, milk production, and postpartum return to ovarian activity in primiparous beef heifers.

R. Harvey, J. D. Armstrong, R. Simpson, 1992, Journal of animal science.

Determinants of estrous behavior in lactating Holstein cows.

J. D. Armstrong, J. Britt, M. Whitacre, 1986, Journal of dairy science.

The effects of levels of concentrate offered and inclusion of maize gluten or fish meal in the concentrate on reproductive performance and blood parameters of dairy cows

W. Mccaughey, J. D. Armstrong, F. Gordon, 1990 .

Nutritionally-induced anestrus in gilts: metabolic and endocrine changes associated with cessation and resumption of estrous cycles.

J. D. Armstrong, J. Britt, 1987, Journal of animal science.

Body condition of sows across parities and relationship to reproductive performance.

J. D. Armstrong, J. Britt, K. Esbenshade, 1986, Journal of animal science.

Control of follicular development during and after lactation in sows.

J. D. Armstrong, J. Britt, N. M. Cox, 2020, Journal of reproduction and fertility. Supplement.

Seasonal differences in function of the hypothalamic-hypophysial-ovarian axis in weaned primiparous sows.

J. D. Armstrong, J. Britt, N. M. Cox, 1986, Journal of reproduction and fertility.

Effects of naloxone or transient weaning on secretion of LH and prolactin in lactating sows.

R. Kraeling, J. D. Armstrong, J. Britt, 1988, Journal of reproduction and fertility.

Pulsatile administration of gonadotropin-releasing hormone to anestrous sows: endocrine changes associated with GnRH-induced and spontaneous estrus.

J. D. Armstrong, J. Britt, 1985, Biology of reproduction.

Effect of active immunization against growth hormone releasing factor on concentrations of somatotropin and insulin-like growth factor I in lactating beef cows.

R. Campbell, K. Moore, R. Harvey, 1992, Domestic animal endocrinology.

Real-time ultrasonography and pregnancy diagnosis in swine

S. White, J. D. Armstrong, W. Flowers, 2000 .

Ovarian expression of insulin-like growth factor-I (IGF-I), IGF binding proteins, and growth hormone (GH) receptor in heifers actively immunized against GH-releasing factors.

R. Campbell, R. Harvey, M. Lucy, 1996, Endocrinology.

Effect of feed restriction on serum somatotropin, insulin-like growth factor-I-(IGF-I) and IGF binding proteins in cyclic heifers actively immunized against growth hormone releasing factor.

R. Campbell, R. Harvey, J. D. Armstrong, 1993, Domestic animal endocrinology.

Effects of active immunization against growth-hormone releasing factor on puberty and reproductive development in gilts.

J. D. Armstrong, J. Britt, K. W. Swanchara, 1999, Journal of animal science.

Paracrine, Autocrine, and Endocrine Factors that Mediate the Influence of Nutrition on Reproduction in Cattle and Swine: An In Vivo, IGF-I Perspective

J. D. Armstrong, A. M. Benoit, 1996 .

Changes in metabolites, metabolic hormones, and luteinizing hormone before puberty in Angus, Braford, Charolais, and Simmental heifers.

R. Harvey, J. D. Armstrong, E. Jones, 1991, Journal of animal science.

Immunization against growth hormone releasing factor or chronic feed restriction initiated at 3.5 months of age reduces ovarian response to pulsatile administration of gonadotropin-releasing hormone at 6 months of age and delays onset of puberty in heifers.

R. Campbell, R. Harvey, J. D. Armstrong, 1996, Biology of reproduction.

Opioid control of growth hormone in the suckled sow is primarily mediated through growth hormone releasing factor.

R. Campbell, J. D. Armstrong, A. Felix, 1990, Domestic animal endocrinology.

N-methyl-D,L-aspartate-induced growth hormone secretion in barrows: possible mechanisms of action.

R. Campbell, C. Barb, J. D. Armstrong, 1996, Journal of animal science.

Aspartate and glutamate modulation of growth hormone secretion in the pig: possible site of action.

R. Campbell, C. Barb, J. D. Armstrong, 1996, Domestic animal endocrinology.

Absence of a nocturnal rise in either norepinephrine, N-acetyltransferase, hydroxyindole-O-methyltransferase or melatonin in the pineal gland of the domestic pig kept under natural environment photoperiods

R. Reiter, J. D. Armstrong, J. Britt, 1987, Neuroscience Letters.

Direct measurements of metabolism, activity and feeding behaviour of pike, Esox Zucius L., in the wild, by the use of heart rate telemetry

I. Priede, L. D. Vera, M. Lucas, 1991 .

Intravenous administration of ionophores in ruminants: effects on metabolism independent of the rumen.

J. D. Armstrong, J. Spears, 1988, Journal of animal science.

Feedlot performance, carcass characteristics, hormones, and metabolites in steers actively immunized against growth hormone-releasing factor.

R. Campbell, R. Harvey, J. D. Armstrong, 1993, Journal of animal science.

Changes in growth hormone and luteinizing hormone following acute or chronic administration of an opioid agonist, FK33-824, in wethers.

J. D. Armstrong, J. Spears, 1991, Journal of animal science.

Effect of active immunization against growth hormone-releasing factor on growth and onset of puberty in beef heifers.

R. Campbell, R. Harvey, J. D. Armstrong, 1991, Journal of animal science.

Effects of acute endotoxemia on serum somatotropin and insulin-like growth factor I concentrations in prepubertal gilts.

R. Richards, J. D. Armstrong, G. Almond, 1997, American journal of veterinary research.

Insulin-like Growth Factor-I (IGF-I) and IGF Binding Proteins: Potential Mediators of the Influence of Nutrition on Ovarian Function in the Heifer and Gilt

J. D. Armstrong, A. M. Benoit, P. D. Schoppee, 1996 .

Recombinant bovine somatotropin increases milk yield and calf gain in diverse breeds of beef cattle: associated changes in hormones and indices of metabolism.

G. Hartnell, R. Harvey, J. D. Armstrong, 1995, Journal of animal science.

Agonists of endogenous opioid peptides suppress LH, and stimulate cortisol and growth hormone during the follicular phase in heifers.

J. D. Armstrong, B. Johnson, 1989, The Journal of endocrinology.

Subclinical mastitis and milk production in primiparous Simmental cows.

R. Harvey, K. Anderson, J. D. Armstrong, 1995, Journal of animal science.

Changes in Animal Welfare Needed to Maintain Social Sustainability

E. Pajor, J. D. Armstrong, 2001 .

Active immunization of pigs against growth hormone-releasing factor: effect on concentrations of growth hormone and insulin-like growth factor 1.

R. Campbell, J. Johnson, J. D. Armstrong, 1990, Journal of animal science.

Morphine suppresses luteinizing hormone concentrations in transiently weaned sows and delays onset of estrus after weaning.

R. Kraeling, J. D. Armstrong, J. Britt, 1988, Journal of animal science.

Influence of dietary phosphorus on the performance of lactating dairy cattle

J. R. Todd, W. Mccaughey, D. Givens, 1989, The Journal of Agricultural Science.