https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2375844/
A nose that roars: anatomical specializations and behavioural
features of rutting male saiga
Abstract
The involvement of the unique saiga nose in vocal production has
been neglected so far. Rutting male saigas produce loud nasal roars.
Prior to roaring, they tense and extend their noses in a highly
stereotypic manner. This change of nose configuration includes
dorsal folding and convex curving of the nasal vestibulum and is
maintained until the roar ends. Red and fallow deer males that
orally roar achieve a temporary increase of vocal tract length (vtl) by larynx retraction. Saiga males attain a similar effect by pulling their flexible nasal vestibulum rostrally, allowing for a temporary elongation
of the nasal vocal tract by about 20%. Decrease of formant frequencies
and formant dispersion, as acoustic effects of an increase of vtl, are assumed to convey important information on the quality of a dominant
male to conspecifics, e.g. on body size and fighting ability. Nasal roaring in saiga may equally serve to deter rival males and to attract females. Anatomical constraints might have set a limit to the rostral pulling of
the nasal vestibulum. It seems likely that the sexual dimorphism of the
saiga nose was induced by sexual selection. Adult males of many
mammalian species, after sniffing or licking female urine or genital secretions, raise their head and strongly retract their upper lip and
small nasal vestibulum while inhalating orally. This flehmen behaviour
is assumed to promote transport of non-volatile substances via the
incisive ducts into the vomeronasal organs for pheromone detection.
The flehmen aspect in saiga involves the extensive flexible walls of the greatly enlarged nasal vestibulum and is characterized by a distinctly concave configuration of the nose region, the reverse of that observed
in nasal roaring. A step-by-step model for the gradual evolution of the
saiga nose is presented here.
http://www.ultimateungulate.com/artiodactyla/saiga_tatarica.html
"The large nose is functional throughout the year, filtering out airborne dust during the summer migrations and heating the air before it reaches
the lungs during the icy winters."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2375844/
A nose that roars: anatomical specializations and behavioural
features of rutting male saiga
The involvement of the unique saiga nose in vocal production has
been neglected so far.
Rutting male saigas produce loud nasal roars.
Prior to roaring, they tense & extend their noses in a highly
stereotypic manner. This change of nose configuration includes
dorsal folding & convex curving of the nasal vestibulum, and is
maintained until the roar ends. Red & fallow deer males that
orally roar achieve a temporary increase of vocal tract length (vtl) by larynx retraction. Saiga males attain a similar effect by pulling their flexible nasal vestibulum rostrally, allowing for a temporary elongation
of the nasal vocal tract by c 20 %. Decrease of formant frequencies
& formant dispersion, as acoustic effects of an increase of vtl, are assumed to convey important information on the quality of a dominant
male to conspecifics, e.g. on body size & fighting ability. Nasal roaring in saiga may equally serve to deter rival males, and to attract females. Anatomical constraints might have set a limit to the rostral pulling of
the nasal vestibulum. It seems likely that the sex.dimorphism of the
saiga nose was induced by sex.selection. Adult males of many
mammalian spp, after sniffing or licking female urine or genital secretions, raise their head, and strongly retract their upper lip &
small nasal vestibulum, while inhalating orally. This flehmen behaviour
is assumed to promote transport of non-volatile substances via the
incisive ducts into the vomero-nasal organs for pheromone detection.
The flehmen aspect in saiga involves the extensive flexible walls of the greatly enlarged nasal vestibulum, and is characterized by a distinctly concave configuration of the nose region, the reverse of that observed
in nasal roaring. A step-by-step model for the gradual evolution of the saiga nose is presented here. http://www.ultimateungulate.com/artiodactyla/saiga_tatarica.html
"The large nose is functional throughout the year, filtering out airborne dust during the summer migrations and heating the air before it reaches
the lungs during the icy winters."
Nooo! They was aquamariners at the coasts, wading, swimming and diving!
Backfloat snorkel????https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2375844/
A nose that roars: anatomical specializations and behavioural
features of rutting male saiga
The involvement of the unique saiga nose in vocal production has
been neglected so far.
Not at all, see my new book:
"De Evolutie van de Mens - waarom wij rechtop lopen en kunnen spreken" Academische uitgeverij - Utrecht NL 2022
Beautiful article, but it should discern between primary & secondary functions.Rutting male saigas produce loud nasal roars.
Prior to roaring, they tense & extend their noses in a highly
stereotypic manner. This change of nose configuration includes
dorsal folding & convex curving of the nasal vestibulum, and is maintained until the roar ends. Red & fallow deer males that
orally roar achieve a temporary increase of vocal tract length (vtl) by larynx retraction. Saiga males attain a similar effect by pulling their flexible nasal vestibulum rostrally, allowing for a temporary elongation of the nasal vocal tract by c 20 %. Decrease of formant frequencies
& formant dispersion, as acoustic effects of an increase of vtl, are assumed to convey important information on the quality of a dominant
male to conspecifics, e.g. on body size & fighting ability. Nasal roaring in saiga may equally serve to deter rival males, and to attract females. Anatomical constraints might have set a limit to the rostral pulling of the nasal vestibulum. It seems likely that the sex.dimorphism of the saiga nose was induced by sex.selection. Adult males of many
mammalian spp, after sniffing or licking female urine or genital secretions, raise their head, and strongly retract their upper lip & small nasal vestibulum, while inhalating orally. This flehmen behaviour is assumed to promote transport of non-volatile substances via the incisive ducts into the vomero-nasal organs for pheromone detection.
The flehmen aspect in saiga involves the extensive flexible walls of the greatly enlarged nasal vestibulum, and is characterized by a distinctly concave configuration of the nose region, the reverse of that observed
in nasal roaring. A step-by-step model for the gradual evolution of the saiga nose is presented here. http://www.ultimateungulate.com/artiodactyla/saiga_tatarica.html
"The large nose is functional throughout the year, filtering out airborne dust during the summer migrations and heating the air before it reaches the lungs during the icy winters."
Some netloon:
Nooo! They was aquamariners at the coasts, wading, swimming and diving!????
Why are such netloons so incredibly stupid??
Can't they google "saiga swim"??
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