Photorefractoriness in European starling
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Nicholls, T. J. ;Goldsmith, A. R. ;Dawson, A.
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Article
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1984
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John Wiley and Sons
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English
โ 512 KB
Responsivity to photostimulation in previously photorefractory European starlings is caused by subjection to short daylengths and is characterized by a marked activation of the hypothalamus in terms of synthesis of gonadotropin releasing hormone. This active hypothalamic state is amplified for a tim