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Abstracts from

VI International Symposium on Avian Endocrinology

March 31 - April 5, 1996 Chateau Lake Louise, Alberta

Page 1

• An Overview of Osmoregulation in Birds
• Hypothalamic Control of Osmoregulation
• Sexual Differences in Osmoregulation
• Osmoregulatory Systems in Free Living Birds
• Nitrogen Excretion in Birds
• Changesin Osmoregulatory Hormones and Water Flux during Saline Acclimation in Peking Ducks
• Changes in Melatonin, Osmoregulatory Hormones, Organ Weights and [125I]Odomelatonin Binding Sites After Saline Acclimation in Male Peking Ducks
• Dehydration up-Regulates Angiotensin II Receptors in the Zebrafinch Hypothalamus
• Effects of Opioid Receptor Agonist and Antagonist on the Release of Arginine Vasotocin in the Chicken
• Endogenous Plasma Atrial Natriuretic Peptide and the Control of Salt Gland Function in the Peking Duck
• Metabolic Adaptive Strategies of Dry and Wet Adapted Zebrafinches (Taeniopygia Guttata) on Low and High Fat Diets

Page 2

• Neuroendocrine Control of Gonadotrophin Secretion
• Inhibin from Embryo till Adult Hen
• Role of Estrogen in the Epididymal Region of the Rooster
• Evolution of Three Dimensional Conformation of Gonadotropin Molecules: Avian Peculiarities
• Molecular Evolution of Avian Gonadotropin Receptors
• A High Correlation between the Electric Activity of Neurones in Preoptic/Anterior Hypothalamic Areas and Lh Release from the Hypophysis in Ducks
• Studies on Puberty of the Female Duck: Patterns of Pituitary and Circulating Lh Levels, and Pituitary LH Release in Response to GnRH Challenge
• Phylogenic Immunology of Avian Gonadotropin: Crossreactivity of Duck Luteinizing Hormone Antibody
• Effects of Food Restriction on cLHRH-I and cLHRH-II in Hypothalamic Nuclei of the Chicken
• Expression of Central Progesterone Receptors during the Breeding Cycle of the Ring Dove
• Increased Vasoactive Intestinal Polypeptide mRNA in the Hypothalami of Incubating Hens
• cGnRH-I mRNA Levels are Increased by Transfer from Short to Long Days in Peripubertal Cockerels and Photosensitive Mature Hens

Page 3

• Distribution of GNRH-I Synthesizing Neurons in the Diencephalon of Cockerels: Effects of Age and Photostimulation
• Morphological Relationships between VIP- and GnRH-like Immunoreactive Neurons in the Lateral Septum of the Pigeon
• Secretion of Luteinizing Hormone during a Forced Moult in Turkey Hens
• Effects of Estradiol-17b and Feeding Level on Ovarian Follicular Development and Lipid Allocation in 59 week Old Meat Type Chickens
• L-Thyroxine Regulates Pituitary LH Function in Castrated Subtropical Finch Estrilda amandava
• PTH/PTHrP and their Common Receptor: State of the Art
• Genomic and Non-Genomic Effects of Vitamin D on Calcium Transport
• Regulation of Plasma Calcium
• Hormonal and Ionic Control of Osteoclast Function
• Involvement of Osteopontin in Epiphyseal Growth Plate Calcification and Egg Shell Formation
• Calcium Transport Mechanisms during Embryonic Development
• The Effects of Growth Hormone on Avian Skeletal Muscle Satellite Cell Proliferation and Differentiation
• Growth Hormone Receptor and Epiphyseal Growth-Plate Chondrocyte Differentiation
• The Effect of 1,25(OH)2D3 and PTH on the Movement of Calcium Across the Cam of the Chicken Embryo
• The Effect of Acetazolamide and Benzolamide on Shell Calcium Mobilization in vitro
• Relationship between Gene Expression of CaBP-D28K and Vitamin D3 Receptor and Calcium Deposition in the Shell Gland of Laying Hens
• Immunohistochemical Localization of Growth Hormone and Growth Hormone Receptor in the Early Chick Embryo

Page 4

• Stem Cell Factor and its Receptor
• Nuclear Hormone Receptors and Cytokine Membrane Receptors in the Control of Chicken Hematopoietic Differentiation and Leukemogenesis
• Potential Roles for Tumor Necrosis Factor-Alpha in the Development of the Chick Embryo Lens
• Role of Growth Factors and Cytokines for the Specification of Neurotransmitter Phenotype of Sympathetic Neurons.
• Cytokine Regulation of Avian Haemopoiesis.
• Localization of EGF and TGF-ß in the Quail Ovary.
• Immune Function in the Oviduct of Laying and Molting Chickens
• Bursectomy in ovo Effects Circulating and Organ Inhibin Levels in Growing Chicks
• GH Pulsatility Does Not Differ between Ascites Resistant and Sensitive Broiler Chickens
• Endocrine-Immune Interactions in White Crown Sparrows

Page 5

• The GH Receptor during Growth and Development
• The Role of Insulin and Insulin Receptors during Development
• Neuroendocrine Control of Early Sexual Development
• Regulation of Somatotroph Differentiation during Chicken Embryonic Development
• Actions of Growth Hormone on Insulin-like Growth Factor-I Vary with Age
• Effect of Cysteamine on the Plasma Concentration of Several Hormones Related to Growth in Growing Geese
• Growth Hormone (GH) Infusion Decreases HepaticGH Binding in Adult Male Chickens, but has Little Effect on Organ Weights, Circulating Metabolite Concentrations or Reproductive Hormones.
• A Heterologous Radioimmunoassay to Measure Growth Hormone in the Ostrich (Struthio camelus).
• Metabolic Responses of the Chicken to an Intravenous Injection of Either Chicken (CIGF-I) or Human Insulin-like Growth Factor-I (hIGF-I)
• Higher Stimulation of Dna Synthesis By Igf-1 in Muscle Cells From Chickens Selected for Growth
• Divergent Selection of Japanese Quail for 4 Week Body Weight Alters the Somatotropic Axis
• Effect of Anesthesia on GH Secretion and Gene Expression in Meat-Type and Laying-Type Chickens

Page 6

• Secretory Patterns of Plasma GH and IGf-1 Concentrations in Meat-Type and Laying-Type Chickens during Early Posthatch Development
• Investigations of the 5'-Region of the Growth Hormone-Encoding Gene in the Chicken
• Development of a RNase Protection Assay for Quantitative Measurement of Chicken Growth Hormone Receptor Transcripts
• Generation of a Turkey Pit-1 cDNA Variant by Alternative Transcription Initiation
• Differential Autoregulation of the Growth Hormone Receptor in Central and Peripheral Tissues
• Principles in Protein Hormone Evolution: the Neurohypophysial Peptides As Avian Evolutionary Tracers
• Arginine Vasotocin in the Domestic Fowl
• An Avian Gene in the GHRH-PACAP Family
• TRH-Related Peptides and GH Secretion
• Vasoactive Intestinal Peptide as the Avian Prolactin-Releasing Factor
• INFLUENCE OF GONADAL HORMONES ON PEPTIDERGIC PATHWAYS OF THE QUAIL BRAIN.
• Brain and Peripheral Estrogen Synthesis in the Brown-Headed Cowbird (Molothrus ater).
• Monoclonal Immunoaffinity Purification and Partial Characterization of a Family of N-Terminal Pro-Opiomelanocortin(Pomc)-Derived Polypeptides from the Chicken Pituitary
• Immunohistochemical Localization of Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) in the Chicken Forebrain
• Circadian Variation in Neuropeptides of Chickens in Relation to Osmotic Stimulation and Egg Laying

Page 7

• in vitro Model to Study Pools for Thyroid Hormones in the Brain of Chickens: Cultured Astrocytes
• Changes in Spontaneous Feeding Activity and Prolactin-Induced Hyperphagia Following Lesions of the Ventromedial Hypothalamus in Ring Doves
• Localization of Galanin and its Receptors in the Avian Brain
• Sexual Dimorphism in the Expression of Arg-Vasotocin in the Chicken Brain
• effects of vip and grf on cyclic amp production IN THE Chicken Pituitary Gland
• Distribution and Time Course of Immunoreactive FOS-like Protein Expression Within the Basal Forebrain of Cockerels Following Dehydration
• Effects of Active Immunization Against cVIP on Incubation Behaviour, Egg Production and Endocrinological Parametersin Turkey Hens
• The Stress Response and Autumn Dispersal in Willow Tits
• Corticosterone and Behavioral Responses to Unpredictable Events
• Role of Archistriatal Nucleus Taeniae in the Sexual Behavior of the Male Japanese Quail
• Electrolytic Lesions of Aromatase-Immunoreactive Neurons Disrupt Appetitive and Consummatory Aspects of Male Sexual Behavior in Quail
• Photoperiodic Regulation of Seasonal Changes in the Volume of Song-Control Nuclei in European Starlings
• cGnRH-I and Neuropeptide Systems Reflect Endocrine and Behavioral Changes during Reproductive Aging
• Luteinizing Hormone (LH), Gonadal Steroids and Prolactin in Relation to Social Behaviour in Male and Female Black-Headed Gulls during the Breeding Period

Page 8

• Behavioral and Hormonal Development in a Small Parrot, the Peach-Faced Lovebird (Agapornis roseicollis)
• Endocrine Mechanisms of Cooperative Breeding in Florida Scrub Jays (Aphelocoma coerulescens)
• The Effects of Testosterone on Reproductive Success in the Dark-Eyed Junco, Junco hyemalis carolinensis
• Plasma Corticosterone Response Characteristics in Mallard Ducks
• Prevention of Incubation Expression Using Passive Immunization Against Prolactin
• Regulation of Food Intake by Metabolic Fuels in Migratory Birds
• Localization of cGnRH-I and pre-pro-GnRH-I mRNA in Laying and Refractory Turkey Hens
• Corticosterone, Body Condition, and Dispersal Behavior in Screech-Owls: a New Model
• Age-Related Differences in Vocal Control Region Size in Adult Dark-Eyed Juncos (Junco hyemalis)
• Short Term Increases in Activity in Gambel's White Crowned Sparrow due to Non Invasive Corticosterone AdministraMechanisms for Seasonal Modulation of the Corticosterone Response to Stress in Free-Living and Captive White-Crowned Sparrows
• Testosterone Implants Increase Song but not Aggression in an Arctic Bird, the Lapland Longspur (Calcarius lapponicus)
• Reductase Activity, Aggression and Reproduction in Bearded Tits
• Effect of `Chemical Adrenomedullectomy' on the Testis of Pigeons

Page 9

• Gene Expression of Ovarian Steroidogenic Enzymes
• The Role of TGFa and IGF-I in Granulosa Cells during Avian Follicular Maturation
• The Chick Anti-Müllerian Hormone Gene
• P450scc Activity in the Brain
• Neural Activation at the Onset of Incubation
• Effect of Gonadotropin-Releasing Hormone on the Proliferation and Steroidogenesis of Cultured Chicken Follicular Cells
• EFFECT OF PROLACTIN ON THE STEROIDOGENESIS AND PROLIFERATION OF CULTURED THECA CELLS FROM DOMESTIC HENS.
• Mitogenic Effects of FGF-2 on Chicken Granulosa and theCal Cells in vitro
• EFFECTS OF ACTIVE IMMUNIZATION AGAINST VASOACTIVE INTESTINAL PEPTIDE (VIP) ON PROLACTIN, HYPOTHALAMIC VIP CONTENT, AND EGG PRODUCTION IN MALLARDS.
• Physiological Correlates of Reproductive Performance in Female Zebra Finches, Taeniopygia guttata
• Physiological and Behavioral Consequences of Active Immunization Against Prolactin in Turkey Hens
• Prolactin Secretory Patterns and Pituitary Lactotroph Changes during the Reproductive Cycle of the Turkey Hen

Page 10

• Testosterone Regulation of Body Compositionin Male Dark-Eyed Juncos: Keep the Muscle, Lose the Fat
• Effects of P450arom Inhibitor on mRNA Expression of P450 C17 and P450arom in the Gonad of the Chicken Embryo: in situ Hybridization Analysis
• Avian Thyroidal Superoxide Radical and Superoxide Dismutase System: Role and Thyrotrophic Regulation with Reference to Iodine Metabolism
• Superoxide Radical Induced Peroxidative Alteration of Avian Thyroid Cell Membrane Fluidity and Molecular Order of Phospholipid Bilayer Under Melatonin Implantation: a Spintrap and Spin-Label Study by EPR Spectroscopy
• Angiotensin II Receptors in Avian Adrenocortical Cells: Sorting Out their Signals and Function
• Molecular Biology of Avian LH and FSH Receptors
• Ca2+ Signalling in Avian Granulosa Cells during Ovarian Follicular Development
• Ion Channel Activities Underlying Avian Granulosa Cell Excitability and Secretion
• Intracellular Mechanism of GH Action
• Growth Hormone Receptors in the Avian Immune System
• Thyroid Hormones are Involved in Insulin-like Growth Factor (IGF)-I Production by Regulating Growth Hormone Receptor (GHR) in the Chicken
• Molecular Cloning, Tissue Distribution and Expression during Various Reproductive States of the Prolactin Receptor in Turkeys
• Distribution of Growth Hormone Receptors in Chicken Liver
• Genetic Evidence for an Interaction between GH and GH-Receptor Genesin White Leghorns
• A Missense Mutation in the Cornell Sex-Linked Dwarf (SLD) Growth Hormone Receptor Gene does not Prevent Plasma GH-Binding

Page 11

• Sex Determination in Birds from the Perspective of Studies on Triploid Intersexes
• Expression of Genes Involved in Estrogen Synthesis and Expression of the Estrogen Receptor Gene during Early Gonadal Development of Chickens
• Genotypic and Phenotypic Sex Reversal
• Are NonGonadal Factors Involved in Sexual Differentiation of the Neural Song Circuit in the Zebra Finches?
• Novel Approaches to Study Avian Sexual Differentiation using Mixed-Sex Chimeric Chickens
• Protein Kinase Genes Expressed in Chicken Primordial Germ Cells
• An Analysis of the Divisional Ability of Chicken Primordial Germ Cells Before and After Settling in the Germinal Ridge
• Expression of Exogenous DNA in Embryonic Gonads by Transferring Primordial Germ Cells Transfected in Vitro
• Asymmetrical Germ Cell Commitment in the Avian Gonad
• Long Term Culture and Characterization of Avian Embryonic Stem Cells with Multiple Morphogenetic Potentialities
• Sexual Differentiation of the Vocal Control System in European Starlings
• Introduction of an Exogenous Gene into Peking Duck Embryos

Page 12

• Avian Gut and Pancreatic Endocrine Cells: Developmental Aspects
• Insulin Secretion
• Insulin Receptors and Insulin Signalling
• Multifactorial Hypothalamic Control of the Thyroid Axis during Growth and Development of the Chicken
• Hormonal and Nutritional Influence on Thyroid Hormone Deiodinating Enzymes
• Insulin Release by Dorsal and Ventral Islets of Langerhans Isolated from the Chicken Pancreas
• Isolation and Characterisation of Muscovy (Cairina moschata) Duck Insulin
• Factors Involved in the Differentiation of Chick Insulin Cells in Culture
• Molecular Cloning of the Chicken Type I and III Iodothyronine Deiodinases
• Thyroid Function in Ostriches
• Peripheral Thyroxine 5'Monodeiodination and Rhythm in Avian Thyroid Function
• Absolute Quantification of MRNA for the Nuclear T3 Receptor in Liver of Broilers of 2 Genetic Lines, by Competitive RT-PCR

Page 13

• The Role of Melatonin in the Circadian Systems of Vertebrates
• Plasticity of Melatonin Receptors in the Avian Brain
• Effects of Melatonin in Synchronizing and Generating Avian Circadian Rhythms
• Melatonin Receptors in Birds
• Variability and Functional Aspects of Endogenous Circadian Rhythm in Japanese Quail Coturnix coturnix japonica
• Development of Post-Hatching Melatonin Rhythm in Zebra Finches (Poephila guttata)
• Circannual Rhythms in Starlings
• Endocrine and Developmental Effects of Environmental Contaminants in Birds
• Hormonal Induction of Ovulation and Oviposition in Quail
• Neuroendocrine Basis of Reproductive Flexibility
• Differences of Dependency on Photoperiods and Temperature in Termination of Reproductive Activity in Three Galliform Species
• HORMONES, EGG YOLK, AND DEVELOPMENT.
• PHOTOPERIODISM IN AMERICAN TREE SPARROWS: ROLE OF THE THYROID GLAND.
• Evidence, Past and Present, of Endocrine Disruption in Fish-Eating Birds in the Great Lakes
• Corticosterone, Gonadal Development and Energetic Condition in Neotropical Migrants: Comparisons between Spring and Fall Migration and Implications for Conservation
• Variation in Plasma Corticosterone Levels in the Chicken (Gallus domesticus), Grey Duck (Anas Superciliosa) and Mallard (Anas platyrhynchos)

Page 14

• Seasonal Cycles of Sex Steroid Plasma Levels in Captive Great Bustard, Otis tarda
• Experiments to Develop a Captive Breeding System for Great Bustard, Otis tarda, on the Basis of Semen Collection and Artificial Insemination
• The Effects of Nerve Growth Factor and Anti-Nerve Growth Factor Antibody on the Neuroendocrine Reproductive System in the European Starling, Sturnus vulgaris
• Seasonal Patterns of LH Secretion and Hypothalamic GNRH Levels in White-Winged Crossbills, Loxia leucoptera
• Relationship between Body Condition and Adrenal Stress Response in Captive American Kestrel Juveniles
• Ecological Factors Underlying the Adrenocortical Response to Capture Stress in Arctic Breeding Shorebirds
• Plasma LH in Juvenile American Kestrels Exposed to Short Days
• Steroid Hormones in the Yolk of Red-Winged Blackbird Eggs
• Maternal Thyroid Hormones in Quail Eggs
• The Effects of Equimolar Doses of Thyroxine (T4) or Triiodothyronine (T3) on Organizational-like Programming of Testicular Growth, Photorefractoriness, and Postnuptial Molt in Thyroidectomized Male American Tree Sparrows
• Photoperiod and Puberty in the Male Emu, Dromaius novaehollandiae
• The Influence of Rainfall on the Timing of the Breeding Season of the Emu Dromaius novahollandiae
• Endocrine Correlates of Delayed Breeding in the Mountain White-Crowned Sparrow
• Differences in Vernal Reproductive System Development between Second-Year and Older Free-Living Male Dark-Eyed Juncos
• A Comparison of Testosterone and Prolactin in Group-Living Mexican Jays (Aphelocoma ultramarina) and Monogamous Scrub Jays (Aphelocoma coerulescens woodhousei)
• Body Weight and Age at Photostimulation: Effects on Reproductive Morphology in Female Meat Type Chickens

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