Central Administration of Chicken Gonadotropin-Releasing Hormone-II Enhances Courtship Behavior in a Female Sparrow

  title={Central Administration of Chicken Gonadotropin-Releasing Hormone-II Enhances Courtship Behavior in a Female Sparrow},
  author={Donna L. Maney and Ralph D. Richardson and John C. Wingfield},
  journal={Hormones and Behavior},
Like most vertebrates, birds have two forms of gonadotropin-releasing hormone (GnRH). Chicken GnRH-I (cGnRH-I) is released at the median eminence to elicit gonadotropin release; chicken GnRH-II (cGnRH-II) is thought to be non-hypophysiotropic and its function is unclear. Both forms are hypothesized to act as neurotransmitters in the control of reproductive behavior. In the present study, we implanted chronic cannulae aimed at the third ventricle in female white-crowned sparrows (Zonotrichia… 
Effects of Gonadotropin-Releasing Hormones, Corticotropin-Releasing Hormone, and Vasopressin on Female Sexual Behavior
The data indicate that neurohormones of the hypothalamic-pituitary-gonadal and the leptin-releasing hormone axes can facilitate reproductive behavior in S. murinus.
Actions of two forms of gonadotropin releasing hormone and a GnRH antagonist on spawning behavior of the goldfish Carassius auratus.
  • H. Volkoff, R. Peter
  • Biology, Environmental Science
    General and comparative endocrinology
  • 1999
The results indicate that GnRH peptides play a major role in the control of female reproductive behavior in goldfish, but have little or no role inThe control of male behavior.
Sex differences in mammalian and chicken-II gonadotropin-releasing hormone immunoreactivity in musk shrew brain.
Data suggest that the phylogenetically conserved cGnRH-II form is regulated by ovarian hormones and, thus, may be involved in the brain-pituitary-gonadal feedback axis.
Role of gonadotropin-releasing hormone II in the mammalian nervous system
Although it is unlikely to be a primary regulator of gonadotropin release, GnRH II appears to have a wide array of physiological and behavioral functions, and increasing evidence suggests that the behavioral effects of Gn RH II are mediated by receptor subtypes distinct from the type-1 GnRH receptor.
Gonadotropin-releasing hormone II stimulates female sexual behavior in marmoset monkeys.
Findings implicate a role for GnRH II and the cognate GnRH type II receptor in stimulating female marmoset sexual behavior and alter the frequency of proceptive behaviors.
An evolutionarily conserved form of gonadotropin-releasing hormone coordinates energy and reproductive behavior.
It is demonstrated that in a primitive mammal, the musk shrew (Suncus murinus), GnRH-II activates mating behavior in nutritionally challenged females within a few minutes after administration, leading to hypothesize that the role of the evolutionarily conserved Gn RH-II peptide is to coordinate reproductive behavior as appropriate to the organism's energetic condition.


Identification of the second gonadotropin-releasing hormone in chicken hypothalamus: evidence that gonadotropin secretion is probably controlled by two distinct gonadotropin-releasing hormones in avian species.
The results indicate that gonadotropin secretion is probably controlled by two distinct GnRHs, at least in avian species.
Distribution of chicken‐II gonadotropin‐releasing hormone in mammalian brain
Radioimmunoassay and immunocytochemistry data suggest that cGnRH‐II is likely to act as a neuromodulator or neurotransmitter in mammals and that the medial habenula is the major site of cNrh‐II action in mammalian brain.
Role of gonadotrophin releasing hormones in the reproductive behaviour of female ring doves (Streptopelia risoria).
  • M. Cheng
  • Biology, Medicine
    The Journal of endocrinology
  • 1977
Treated ring doves treated with synthetic LH releasing hormone enabled such birds to show typical female behaviour, thus supporting the hypothesis that a high dose of oestrogen suppresses the synergistic action of GnRH with oestrogens which is required to elicit courtship behaviour.
Modulation of the lordosis reflex of female rats by LHRH, its antiserum and analogs in the mesencephalic central gray.
Effects of intracerebral infusion of LHRH and related compounds on the lordosis reflex were examined in ovariectomized, estrogen-treated female rats and showed a clear dissociation between their behavioral effects and their reported effects on LH release.
Immunohistochemical localization of chicken gonadotropin‐releasing hormones I and II (cGnRH I and II) in turkey hen brain
The distribution of cells and fibers immunoreactive for either chicken gonadotropin‐releasing hormone I or II was determined in brains of turkey hens to reveal whether these peptides occur in separate neuronal systems and that cGnRH II does not directly promote pituitary gonadotropic hormone secretion.