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	Author	Passilongo, D.; Mattioli, L.; Bassi, E.; Szabó, L.; Apollonio, M.
	Title	Visualizing sound: counting wolves by using a spectral view of the chorus howling			Type	Journal Article
	Year	2015	Publication	Frontiers in Zoology	Abbreviated Journal	Front. Zool.
	Volume	12	Issue	1	Pages	22
	Keywords
	Abstract	Monitoring large carnivores is a central issue in conservation biology. The wolf (Canis lupus) is the most studied large carnivore in the world. After a massive decline and several local extinctions, mostly due to direct persecutions, wolves are now recolonizing many areas of their historical natural range. One of the main monitoring techniques is the howling survey, which is based on the wolves' tendency to use vocalisations to mark territory ownership in response to howls of unknown individuals. In most cases wolf howling sessions are useful for the localisation of the pack, but they provide only an aural estimation of the chorus size.
	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	1742-9994	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Passilongo2015			Serial	6498
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	Author	Passilongo, D.; Marchetto, M.; Apollonio, M.
	Title	Singing in a wolf chorus: structure and complexity of a multicomponent acoustic behaviour			Type	Journal Article
	Year	2017	Publication	Hystrix, the Italian Journal of Mammalogy	Abbreviated Journal	Hysterix
	Volume	28	Issue	2	Pages	180-185
	Keywords
	Abstract	Wolf choruses ( Canis lupus ) are complex, multicomponent signals, composed by a series of different vocalizations emitted by a pack. Although howls, the main component, have been highly studied, poor attention has been drawn upon the other vocalizations of the chorus. In this study, we investigate the structure of the chorus by means of the analysis and the quantification of the different components, taking advantage both of the digital sound recording and analysis, and of the modern statistical methodologies. We provide for the first time a detailed, objective description of the types of call emitted during the wolf howlings, combining spectrographic examinations, spectral analyses and automated classifications, with the aim to identify different types of call. Our results show that wolf choruses have a rich, complex structure, that reveals six other types of call, to be added to those howls already described in literature. Wolf choruses are typically composed by other three different types of calls: the bark, i.e. relatively long calls characterized by low frequencies and the presence of harsh components (deterministic chaos); the whimper, characterized by a harmonic structure and a very short duration; and the growl, a call with a noisy structure, low frequencies but relative long duration. Although further investigations are necessary to understand the meaning of the different calls, this research provides a basis for those studies that aim to compare wolves and other canids vocal behaviour.
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	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	0394-1914	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Passilongo2017			Serial	6441
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	Author	Blanco, J.C.; Yolanda, C.
	Title	Surveying wolves without snow: a critical review of the methods used in Spain. Hystrix			Type	Journal Article
	Year	2012	Publication	Ital J Mammal	Abbreviated Journal
	Volume	23	Issue		Pages
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	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
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	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Blanco2012			Serial	6460
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	Author	Gazzola, A.; Avanzinelli, E.; Mauri, L.; Scandura, M.; Apollonio, M.
	Title	Temporal changes of howling in south European wolf packs			Type	Journal Article
	Year	2002	Publication	Ital J Zool	Abbreviated Journal
	Volume	69	Issue		Pages
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	Abstract
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	Corporate Author				Thesis
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	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Gazzola2002			Serial	6495
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	Author	Riede, T.; Herzel, H.; Mehwald, D.; Seidner, W.; Trumler, E.; Böhme, G.
	Title	Nonlinear phenomena in the natural howling of a dog-wolf mix			Type	Journal Article
	Year	2000	Publication	J Acoust Soc Am	Abbreviated Journal
	Volume	108	Issue		Pages
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Riede2000			Serial	6484
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	Author	Nowak, S.; Jedrzejewski, W.; Schmidt, K.; Theuerkauf, J.; Myslajek, R.W.; Jedrzejewska, B.
	Title	Howling activity of free-ranging wolves (Canis lupus) in the Bialowieza Primeval Forest and the Western Beskidy Mountains (Poland)			Type	Journal Article
	Year	2006	Publication	J Ethol	Abbreviated Journal
	Volume	25	Issue		Pages
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	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Nowak2006			Serial	6459
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	Author	Morgan, T.W.; Elliott, C.L.
	Title	Comparison of remotely-triggered cameras vs. howling surveys for estimating coyote (Canis latrans) Abundance in central Kentucky			Type	Journal Article
	Year	2011	Publication	J Ky Acad Science	Abbreviated Journal
	Volume	72	Issue		Pages
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Morgan2011			Serial	6492
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	Author	Palacios, V.; Font, E.; Marquez, R.
	Title	Iberian wolf howls: acoustic structure, individual variation, and a comparison with North American populations			Type	Journal Article
	Year	2007	Publication	J Mammal	Abbreviated Journal
	Volume	88	Issue		Pages
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Palacios2007			Serial	6469
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	Author	Stenglein, J.L.; Waits, L.P.; Ausband, D.E.; Zager, P.; Mack, C.M.
	Title	Estimating gray wolf pack size and family relationships using non invasive genetic sampling at rendezvous sites			Type	Journal Article
	Year	2011	Publication	J Mammal	Abbreviated Journal
	Volume	92	Issue		Pages
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	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Stenglein2011			Serial	6476
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	Author	Herbst, C.T.; Herzel, H.; Svec, J.G.; Wyman, M.T.; Fitch, W.T.
	Title	Visualization of system dynamics using phasegrams			Type	Journal Article
	Year	2013	Publication	J R Soc Interface	Abbreviated Journal
	Volume	10	Issue		Pages
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	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
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	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number	Equine Behaviour @ team @ Herbst2013			Serial	6487
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