Journal ArticleDOI
Potential roles for GNIH and GNRH-II in reproductive axis regulation of an opportunistically breeding songbird.
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TLDR
Investigation of neuroendocrine patterns in wild Australian zebra finches sampled during a breeding period in Southern Australia, a non-breeding period in central Australia, and in juvenile males found that the numbers and sizes of immunoreactive (-ir) GnRH-I cells did not vary between breeding stages and ages.About:
This article is published in General and Comparative Endocrinology.The article was published on 2011-08-01. It has received 57 citations till now. The article focuses on the topics: Gonadotropin secretion & Zebra finch.read more
Citations
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Journal ArticleDOI
Seasonal control of gonadotropin-inhibitory hormone (GnIH) in birds and mammals.
TL;DR: The present overview summarizes the role of GnIH in avian and mammalian seasonal breeding while considering the similarities and disparities that have emerged from broad investigations across reproductively photoperiodic species.
Book ChapterDOI
Reproduction in Male Birds
TL;DR: The process of reproductive system development and function in the male bird is discussed to provide insight that may be missed if reproduction is viewed primarily as an isolated act.
Journal ArticleDOI
Seasonal Effect of Gonadotrophin Inhibitory Hormone on Gonadotrophin-Releasing Hormone-induced Gonadotroph Functions in the Goldfish Pituitary
TL;DR: Results indicate that, in goldfish, gGnIH and GnRH modulate pituitary GnIH‐R expression and gNIH differentially affects sGn RH and cGnRH‐II regulation of LH secretion and gonadotrophin subunit mRNA levels, which are manifested in a reproductive stage‐dependent manner.
Journal ArticleDOI
Seasonal reproductive tactics: annual timing and the capital-to-income breeder continuum
Cory T. Williams,Marcel Klaassen,Brian M. Barnes,C. Loren Buck,Walter Arnold,Sylvain Giroud,Sebastian G. Vetter,Thomas Ruf +7 more
TL;DR: This article examines how plasticity in the allocation of capital towards reproduction is linked to phenological flexibility via interactions between endocrine/neuroendocrine control systems and the sensory circuits that detect changes in endogenous state, and environmental cues, and describes the ecological drivers of reproductive timing in species that vary in the degree to which they finance reproduction using capital.
Journal ArticleDOI
Food, stress, and circulating testosterone: Cue integration by the testes, not the brain, in male zebra finches (Taeniopygia guttata).
TL;DR: Fasting increased corticosterone and decreased testosterone in circulation, indicating that the testes can integrate and respond to cues of stress directly, and local inhibition of testosterone synthesis may allow for rapid and reversible changes in physiology and behavior when conditions are inappropriate for breeding.
References
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Book
The Zebra Finch: A Synthesis of Field and Laboratory Studies
TL;DR: This treatise aims to clarify the role of language in the ecology of songbird populations and investigates its role in the selection and mate choice of birds.
Journal ArticleDOI
Photoperiodic Control of Seasonality in Birds
TL;DR: This review examines how birds use the annual cycle in photoperiod to ensure that seasonal events—breeding, molt, and song production—happen at the appropriate time of year.
Journal ArticleDOI
A novel avian hypothalamic peptide inhibiting gonadotropin release.
Kazuyoshi Tsutsui,Etsuko Saigoh,Kazuyoshi Ukena,Hitoshi Teranishi,Yuko Fujisawa,Motoshi Kikuchi,Susumu Ishii,Peter J. Sharp +7 more
TL;DR: It is shown, in a bird, that the hypothalamus also contains a novel peptide which inhibits gonadotropin release, the first hypothalamic peptide inhibiting gonadotropic hormone reported in a vertebrate.
Journal ArticleDOI
Identification and characterization of a gonadotropin-inhibitory system in the brains of mammals
Lance J. Kriegsfeld,Dan Feng Mei,George E. Bentley,Takayoshi Ubuka,Alex O. Mason,Kazuhiko Inoue,Kazuyoshi Ukena,Kazuyoshi Tsutsui,Rae Silver +8 more
TL;DR: The distribution of GnIH efferents to neural sites regulating reproductive behavior and neuroendocrine secretions, expression of steroid receptors in GnIh-ir nuclei, and GnI H inhibition of luteinizing hormone secretion indicate the discovery of a system regulating the mammalian reproductive axis.
Journal ArticleDOI
Rat RFamide-related peptide-3 stimulates GH secretion, inhibits LH secretion, and has variable effects on sex behavior in the adult male rat
TL;DR: Results indicate that although RFRP-3 has similar effects on LH as observed with GnIH in avian species, in the rat RFRPs has additional roles in regulating feeding and growth.