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1

Predicting the potential impacts of trophy hunting on population structure of Himalayan ibex (Capra sibirica) in Northern Pakistan

100%
Khan M. Z., Begum F., Riaz M., Khan B., Karim R., Karamat A., Safina A.
Polish Journal of Ecology
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2019
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tom 67
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nr 3
2

Sexual dimorphism in size of the skull of Spanish ibex Capra pyrenaica

100%
Fandos P., Vigal C. R.
Acta Theriologica
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1993
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tom 38
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nr 1
Sexual dimorphism in the skull of Spanish ibex Capra pyrenaica Schinz, 1838 is analyzed by means of univariate and multivariate techniques in one of the most representative populations of the species, located in the Sierra de Gredos, central Spain. Thirty eight measurements were used for the analysis: 30 of the skull and mandible, and 8 of the horn. Eighty three skulls (40 males and 43 females) of individuals older than 4 years were used. In 36 out of the 38 variables males were significantly larger than females. Horn characters showed the highest variability and also the most significant differences between sexes. Values of Mahalanobis distance between males and females were high (D2 = 323.1). When Factor Analysis is performed with the whole set of 38 variables, 7 Principal Factors were extracted, scores of Principal Factor 2 (related with horn variables) and Principal Factor 3 {related to molar toothrow length) showing significant differences between sexes. In this analysis, horn characters (Principal Factor 2) accumulate the sexual dimorphism of other skull traits. However, if the same analysis is performed without horn characters, 5 Principal Factors were extracted, scores of three Principal Factors showing significant differ­ences between sexes. Highest sexual dimorphism in this analysis corresponds to the Principal Factor 3 (molar toothrow), follow the Principal Factor 2 (posterior region of the skull) and Principal Factor 1 (main length measurements). This suggest that the high degree of sexual dimorphism observed in the Spanish ibex skull is mainly related to horn traits and, to a lesser extent, of other skull features like molar toothrow length.
3

Population dynamics of the Spanish ibex Capra pyrenaica in Sierra Nevada Natural Park [Southern Spain]

100%
Perez J. M., Granados J. E., Soriguer R. C.
Acta Theriologica
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1994
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tom 39
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nr 3
The whole area of distribution of the Spanish ibex Capra pyrenaica Schinz, 1838 population of Sierra Nevada Natural Park was surveyed for the first time during July-August 1993 and the densities were estimated by using the line transects method. A mean density of 7.69 ± 0.50 ibexes/km2 was obtained, with sex ratio (males/ /females) of 0.80 and kids/adult females rate of 0.39. Data on size and composition of groups and on altitudinal distribution are also included. The demographic trend of ibexes in Sierra Nevada during last 30 years is reconstructed on the basis of data referred to the National Game Reserve, located within our study area.
4

Tooth wear and its relation to kind of food: The repercussion on age criteria in Capra pyrenaica

100%
Fandos P., Orueta J. F., Aranda Y.
Acta Theriologica
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1993
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tom 38
|
nr 1
Tooth wear was studied in two Iberian populations of Capra pyrenaica Schinz, 1838. Age-specific variation in type of wear and molar height was compared between sites. Age-specific wear of Mi and M3 was different between the two populations. The relationship of molar height and age (assumed to be wear rate) was also different in each population. The largest differences were found if we consider tooth wear rate as the sum of Mi height + height of mandible. The population of ibex from Gredos appeared to have a much faster tooth wear rate than of Cazorla. The relationship between the results and food types in the different mountain ranges are discussed. A positive relationship was found between tooth wear and the presence of abrasive ele­ments in the diet. Tooth wear appears to bo highly population-specific and this implies important consequences for their life history. Our results question the validity of age-determination techniques based on tooth wear for inter-populational comparisons.
5

Spatial behaviour of adult male Alpine ibex Capra ibex ibex in the Gran Paradiso National Park, Italy

80%
Parrini F., Grignolio S., Luccarini S., Bassano B., Apollonio M.
Acta Theriologica
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2003
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tom 48
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nr 3
During a two year preliminary study, the spatial organization of a group of male Alpine ibex Capra ibex ibex Linnaeus, 1758 was examined in the Gran Paradiso National Park, Western Italian Alps, Italy. From December 1995 to January 1998 we measured annual, seasonal home range and home range during the rut, plus altitudinal migration of 13 radio-collared adult Alpine ibex. The small annual home range size showed a traditional use of space, confirmed by the high overlapping values between home ranges of consecutive years: the ibex used the same places from year to year. This was also true during periods of rut. Home ranges closely overlapped in consecutive ruts, while their size changed from winter to winter. Snow cover limited the movements of the ibex; winter and spring home ranges were smaller than those in summer and autumn. Mean vertical movement patterns were similar in the two years, showing the highest values in summer and the lowest in spring. Space use was never proportional to availability for each altitudinal range.
6

Summer feeding strategy of Spanish ibex Capra pyrenaica and domestic sheep Ovis aries in South-Eastern Spain

80%
Martinez T.
Acta Theriologica
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2002
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tom 47
|
nr 4
The feeding strategies of the Spanish ibex Capra pyrenaica Schinz, 1838 and sheep Ovis aries Linnaeus, 1758 during summer in the alpine area of Sierra Nevada in south-eastern Spain were compared. The degree of vegetation use by the two ungulates, food availability, diet composition, species selection indices and the effect of plant availability and chemical composition on diet selection were analysed. The available biomass of herbaceous and woody resources was 87 and 13%, respectively. The degree of use was 15% for herbaceous vegetation and 10.3% for woody vegetation. The most used species were those with moderate amounts in diet composition of both ruminants. The main plant groups consumed by Spanish ibex were graminoids (57.5%), shrubs (20.5%) and chamaephytes (14.3%). Sheep consumed graminoids (41.6%), forbs (32.3%) and chamaephytes (20.9%). There was a significant correlation between the two diets, with an overlap of 56.3%. The highest indices of selection were found in items with moderate-low availability and which comprised moderate levels in the diet composition of the two species. Spanish ibex mainly selected diet according to availability, while sheep selection depended on protein content. The ibex consumed cell wall-rich resources such as grasses and shrubs, while the sheep consumed higher quality feed and includes more forbs in its diet.
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