... Mongolian gazelles are one of the last abundant, nomadic ungulates. ... Serengeti Eco-logical... more ... Mongolian gazelles are one of the last abundant, nomadic ungulates. ... Serengeti Eco-logicalMonitoring Programme, African Wildlife Leadership Foundation, Nairobi, Kenya. ... In Rangelands of Central Asia: Proceedings of the Conference on Transformations, Issues, and Future ...
Abstract Human-generated landscape barriers are especially problematic for species whose life his... more Abstract Human-generated landscape barriers are especially problematic for species whose life histories entail long-distance movements. In May 2008, hundreds of Mongolian gazelles (Procapra gutturosa) became entangled in border fences as thousands attempted to move ...
Mongolian gazelles (Procapra gutturosa) are one of Asia's last large populations of ungulates... more Mongolian gazelles (Procapra gutturosa) are one of Asia's last large populations of ungulates and their 275000-km2 steppe habitat is considered to be the largest remaining example of a temperate grassland ecosystem. The gazelles and their habitat are increasingly threatened ...
1 Head Anatomy of Male and Female Mongolian GazelleA Striking Example of Sexual Dimorphism Rolan... more 1 Head Anatomy of Male and Female Mongolian GazelleA Striking Example of Sexual Dimorphism Roland Frey1, Alban Gebler2, Kirk A. Olson3, Daria Odonkhuu3, Guido Fritsch4, Nyamsuren Batsaikhan5, and Ingo W. Stuermer6 1.1 Introduction The first scientifi fi c description of ...
This study provides the first evidence of pronounced temporary laryngeal descent in a bovid speci... more This study provides the first evidence of pronounced temporary laryngeal descent in a bovid species. An elaborate acoustic display is prominent in male courtship behavior of polygynous Mongolian gazelle. During rut, rounding up of females is accompanied by continuous head-up barking by dominant males. Throughout the rut their evolutionarily enlarged larynx descends to a low mid-neck resting position. In the course of each bark the larynx is additionally retracted toward the sternum by 30% of the resting vocal tract length. A geometric model of active larynx movements was constructed by combining results of video documentation, dissection, skeletonization, and behavioral observation. The considerable distance between resting position and maximal laryngeal descent suggests a backward tilting of the hyoid apparatus and an extension of the thyrohyoid connection during the retraction phase. Return to the resting position is effected by strap muscles and by the elastic recoil of the pharynx and the thyrohyoid connection. An intrapharyngeal inflation of the peculiar palatinal pharyngeal pouch of adult males is inferred from a short-time expansion of the ventral neck region rostral to the laryngeal prominence. The neck of adult dominant males is accentuated by long gray guard hairs during the rut. The passive swinging of the heavy larynx of adult males during locomotion gives the impression of a handicap imposed on rutting males. Apparently, this disadvantage becomes outweighed by the profits for reproductive success.
... Mongolian gazelles are one of the last abundant, nomadic ungulates. ... Serengeti Eco-logical... more ... Mongolian gazelles are one of the last abundant, nomadic ungulates. ... Serengeti Eco-logicalMonitoring Programme, African Wildlife Leadership Foundation, Nairobi, Kenya. ... In Rangelands of Central Asia: Proceedings of the Conference on Transformations, Issues, and Future ...
Abstract Human-generated landscape barriers are especially problematic for species whose life his... more Abstract Human-generated landscape barriers are especially problematic for species whose life histories entail long-distance movements. In May 2008, hundreds of Mongolian gazelles (Procapra gutturosa) became entangled in border fences as thousands attempted to move ...
Mongolian gazelles (Procapra gutturosa) are one of Asia's last large populations of ungulates... more Mongolian gazelles (Procapra gutturosa) are one of Asia's last large populations of ungulates and their 275000-km2 steppe habitat is considered to be the largest remaining example of a temperate grassland ecosystem. The gazelles and their habitat are increasingly threatened ...
1 Head Anatomy of Male and Female Mongolian GazelleA Striking Example of Sexual Dimorphism Rolan... more 1 Head Anatomy of Male and Female Mongolian GazelleA Striking Example of Sexual Dimorphism Roland Frey1, Alban Gebler2, Kirk A. Olson3, Daria Odonkhuu3, Guido Fritsch4, Nyamsuren Batsaikhan5, and Ingo W. Stuermer6 1.1 Introduction The first scientifi fi c description of ...
This study provides the first evidence of pronounced temporary laryngeal descent in a bovid speci... more This study provides the first evidence of pronounced temporary laryngeal descent in a bovid species. An elaborate acoustic display is prominent in male courtship behavior of polygynous Mongolian gazelle. During rut, rounding up of females is accompanied by continuous head-up barking by dominant males. Throughout the rut their evolutionarily enlarged larynx descends to a low mid-neck resting position. In the course of each bark the larynx is additionally retracted toward the sternum by 30% of the resting vocal tract length. A geometric model of active larynx movements was constructed by combining results of video documentation, dissection, skeletonization, and behavioral observation. The considerable distance between resting position and maximal laryngeal descent suggests a backward tilting of the hyoid apparatus and an extension of the thyrohyoid connection during the retraction phase. Return to the resting position is effected by strap muscles and by the elastic recoil of the pharynx and the thyrohyoid connection. An intrapharyngeal inflation of the peculiar palatinal pharyngeal pouch of adult males is inferred from a short-time expansion of the ventral neck region rostral to the laryngeal prominence. The neck of adult dominant males is accentuated by long gray guard hairs during the rut. The passive swinging of the heavy larynx of adult males during locomotion gives the impression of a handicap imposed on rutting males. Apparently, this disadvantage becomes outweighed by the profits for reproductive success.
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