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Gonadotropin‐Inhibitory Peptide in Song Sparrows (Melospiza melodia) in Different Reproductive Conditions, and in House Sparrows (Passer domesticus) Relative to Chicken‐Gonadotropin‐Releasing Hormone
Gonadotropin‐releasing hormone (GnRH) regulates reproduction in all vertebrates. Until recently, an antagonistic neuropeptide for gonadotropin was unknown. The discovery of an RFamide peptide inExpand
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Interactions of gonadotropin-releasing hormone (GnRH) and gonadotropin-inhibitory hormone (GnIH) in birds and mammals.
Gonadotropin-releasing hormone (GnRH) regulates secretion of both of the gonadotropins, luteinizing hormone (LH) and follicle-stimulating hormone. Thus, it is a key hormone for vertebrateExpand
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Opportunism at work: habitat predictability affects reproductive readiness in free‐living zebra finches
Summary 1 Opportunistic breeding (i.e. breeding whenever favourable conditions occur, regardless of interval or periodicity) is a strategy often adopted by animals breeding in habitats whereExpand
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Food, stress, and circulating testosterone: Cue integration by the testes, not the brain, in male zebra finches (Taeniopygia guttata).
Food abundance is closely associated with reproductive readiness in vertebrates. Food scarcity can activate the hypothalamo-pituitary-adrenal axis, decrease sex steroid secretion, and dampenExpand
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Physiological trade-offs in self-maintenance: plumage molt and stress physiology in birds
SUMMARY Trade-offs between self-maintenance processes can affect life-history evolution. Integument replacement and the stress response both promote self-maintenance and affect survival inExpand
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Anticipating Spring: Wild Populations of Great Tits (Parus major) Differ in Expression of Key Genes for Photoperiodic Time Measurement
Measuring day length is critical for timing annual changes in physiology and behavior in many species. Recently, rapid changes in several photoperiodically-controlled genes following exposure to aExpand
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Cue hierarchies and testicular development: Is food a more potent stimulus than day length in an opportunistic breeder (Taeniopygia g. guttata)?
Opportunistic breeders inhabit areas with unpredictable changes in environmental conditions. In such places favorable breeding conditions can occur during any time of year, and one prediction is thatExpand
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Testicular growth and regression are not correlated with Dio2 expression in a wild male songbird, sturnus vulgaris, exposed to natural changes in photoperiod.
Timing of seasonal breeding in birds and mammals is regulated by changing the day length and is dependent on the presence of thyroid hormones. A mechanism for thyroid-dependent control of seasonalityExpand
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Social cues regulate reciprocal switching of hypothalamic Dio2/Dio3 and the transition into final follicle maturation in European starlings (Sturnus vulgaris).
With final maturation of ovarian follicles, birds are committed to a major energetic investment: egg laying. Follicles develop in a 2-step process: 1) initial development of regressed folliclesExpand
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Season- and context-dependent sex differences in melatonin receptor activity in a forebrain song control nucleus
There are dense populations of melatonin receptors in large areas of the songbird brain, in particular in the visual system and the song control system. Melatonin has therefore been implicated inExpand
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