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	Author	Zentall, T.R; Hogan, D.E.
	Title	Key pecking in pigeons produced by pairing keylight with inaccessible grain			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	J Exp Anal Behav
	Volume	23	Issue	2	Pages	199-206
	Keywords
	Abstract	In Experiment I, keylight was paired with inaccessible grain delivery (under two conditions of keylight intensity) to determine if autoshaping would occur in the absence of primary reinforcement. In Experiment II, the procedure was repeated with accessible grain, for comparison. In Experiment III, the procedures were repeated with explicitly unpaired presentations of keylight and either inaccessible or accessible grain. The results indicated that key pecking occurred as quickly in the presence of keylight pairings with inaccessible grain as with accessible grain, though (except for one bird) key pecking was not maintained with inaccessible grain. Furthermore, compared to the dim keylight, the bright keylight greatly suppressed key pecking when paired with inaccessible grain, and reduced the rate of key pecking when paired with accessible grain. Little key pecking occurred in groups exposed to explicitly unpaired presentations of keylight (whether bright or dim) and grain (whether accessible or inaccessible). When the birds in Experiment III were retested with explicitly paired presentations of keylight and grain, little key pecking was observed, suggesting suppressive effects of prior explicitly unpaired presentations. It is suggested that the effects of key-brightness manipulation were produced by the association of grain with cues other than the response key, or by distraction produced by partial illumination of the grain hopper.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0022-5002	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16811840			Approved	no
	Call Number	refbase @ user @			Serial	273
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	Author	Douglas Rh, G.O.
	Title	Development of the equine fetus and placenta			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	J Reprod Fert (Suppl)
	Volume	23	Issue		Pages	495-498
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1023
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	Author	Eisenmann V,
	Title	Nouvelles interpretations des restes d`équides de Nihowan Equus teilhardi Nov.Sp			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Geobios
	Volume	8	Issue		Pages	125-134
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1047
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	Author	FRASER AF et al,
	Title	An exploratory ultrasonic study on quntitative foetal kinesis in the horse			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Appl Anim Ethol
	Volume	1	Issue		Pages	395-404
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1093
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	Author	Imesh Gd, S.G.
	Title	Gross and microscopic observations of ovarian abnormalities from five Burchell's zebra			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Onderstepoort J vet Res
	Volume	42	Issue		Pages	109-116
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1213
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	Author	Klingel H,
	Title	Die soziale Organisation der Equiden			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Verh Dtsch Zool Ges in Karlsruhe
	Volume		Issue		Pages	71-80
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1308
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	Author	Leuthold W, L.B.
	Title	Temporal patterns of reproduction in ungulates of Tsavo East National Park Kenya			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	E Afr Wildl J
	Volume	13	Issue		Pages	159-170
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1345
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	Author	Malcom Jr, L.H.
	Title	Notes on wild dogs hunting zebras			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Mammalia
	Volume	39	Issue		Pages	231-240
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1363
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	Author	Montagu I,
	Title	The wild ass of Africa			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	Wild Life
	Volume	17	Issue		Pages	400-401
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1409
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	Author	Niekerk Van Ch, A.W.
	Title	Early embryonic development in the horse			Type	Journal Article
	Year	1975	Publication		Abbreviated Journal	J Reprod Fert Suppl
	Volume	23	Issue		Pages	495-498
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes	from Professor Hans Klingels Equine Reference List			Approved	no
	Call Number				Serial	1417
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