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22 results for “Alpine ibex”
Fig. 2. Male P in Protostrongylus caprae Zdzitowiecki et Boev, 1971 (Nematoda: Protostrongylidae) - First record in Alpine ibex (Capra ibex Linnaeus, 1758) from Europe
Fig. 2. Male P. caprae from an Alpine ibex from Austria: a) Dorsolateral view of copulatory bursa: 1 — dorsal ray, 2 — exterodorsal ray, 3 — postero-lateral and medio-lateral rays, 4 — antero-lateral ray, 5 — ventral rays. b) Two symmetrical parts of copulatory bursa: 1 — dorsal ray, 2 — exterodorsal ray, 3 — postero-lateral and medio-lateral rays, 4 — anterolateral ray, 5 — ventral rays. (original pictures).
Fig. 1. Male P in Protostrongylus caprae Zdzitowiecki et Boev, 1971 (Nematoda: Protostrongylidae) - First record in Alpine ibex (Capra ibex Linnaeus, 1758) from Europe
Fig. 1. Male P. caprae from an Alpine ibex from Austria: a) Ventral view: 1 — spicules, 2 —gubernaculum, 3 — copulatory bursa. b) Dorsal view: 1 — lateral alae, 2 — telamon. (original pictures).
Fig. 5. Male P in Protostrongylus caprae Zdzitowiecki et Boev, 1971 (Nematoda: Protostrongylidae) - First record in Alpine ibex (Capra ibex Linnaeus, 1758) from Europe
Fig. 5. Male P. caprae from an Alpine ibex from Austria: a) Parts of gubernaculum: 1 — capitulum, 2 — proximal parts of corpus, 3 — distal parts of corpus, 4 — crura. b) Crura of gubernaculum. (original pictures).
Monitoring wildlife population trends with sample counts: A case study on the Alpine ibex (Capra ibex)
<p><span>Monitoring population dynamics is of fundamental importance in conservation but assessing trends in abundance can be costly, especially in large and rough areas. Obtaining trend estimations from counts performed in only a portion of the total area (sample counts) can be a cost-effective method to improve the monitoring and conservation of species difficult to count. </span></p> <p><span>We tested the effectiveness of sample counts in monitoring population trends of wild animals, using as a model population the Alpine ibex (<em>Capra ibex</em>) in the Gran Paradiso National Park (Italy), both with computer simulations and using historical count data collected over the last 65 years. Despite sample counts failed to correctly estimate the true population abundance, sampling half of the target area could reliably monitor the trend of the target population. In case of strong changes in abundance, an even lower proportion of the total area could be sufficient to identify the direction of the population trend. However, when there is a high yearly trend variability, the required number of samples increases and even counting in the entire area can be ineffective to detect population trends. The effect of other parameters, such as which portion of the area is sampled and detectability, was lower, but these should be tested case by case. </span></p> <p><span>Sample counts could therefore constitute a viable alternative to assess population trends, allowing for important, cost-effective improvements in the monitoring of wild animals of conservation interest. </span></p>
Monitoring wildlife population trends with sample counts: A case study on the Alpine ibex (Capra ibex)
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Alpine ibex simulation files
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Data and scripts from: Long term analysis of social structure: evidence of age-based consistent associations in male Alpine ibex
<p>The folder contains the data and scripts used to produce the manuscript: "Long term analysis of social structure: evidence of age-based consistent associations in Alpine ibex" by Alice Brambilla, Achaz von Hardenberg, Claudia Canedoli, Francesca Brivio, Cédric Sueur and Christina R Stanley.</p>
Data from: Climate drives body mass changes in a mountain ungulate: Shorter winters lead to heavier Alpine ibex
<p>Climate affects seasonality and plant phenology, which can influence seasonal body mass dynamics of herbivores in temperate environments. We investigated long-term trends of seasonal body mass changes in male Alpine ibex (<em>Capra ibex</em>). We used SEM to test direct and indirect relationships between body mass, mass changes and environmental and climatic variables. Individually recognizable Alpine ibex were weighed repeatedly between 2000 and 2022 in Gran Paradiso National Park (Italy). Autumn mass increased substantially over these two decades, up to 15% in some age classes. Over the same time frame, both summer mass gain and winter mass loss decreased, suggesting that heavier autumn body mass was due to the cumulative effects of reduced mass loss over several winters. The environmental factor with the strongest effects on winter mass changes was the starting date of vegetation green-up at low altitude, where ibex gather after winter to feed on new growth vegetation. Early springs led to lower winter mass loss, likely because ibex relied on stored fat for a shorter period and had greater access to forage. High population density also increased winter mass loss. Environmental conditions and resource availability, possibly also influenced by density in winter and early spring seem therefore to directly affect the body mass dynamics of male Alpine ibex, while the effect of summer conditions appears less relevant. By affecting seasonal body mass dynamics, climate change may have consequences for life history and population dynamics of mountain herbivores, for example via earlier access of young males to reproduction.</p>
Fig. 6. Female P in Protostrongylus caprae Zdzitowiecki et Boev, 1971 (Nematoda: Protostrongylidae) - First record in Alpine ibex (Capra ibex Linnaeus, 1758) from Europe
Fig. 6. Female P. caprae from an Alpine ibex from Austria: 1 — anus, 2 —provagina, 3 — vulva.
Identifying the environmental drivers of corridors and predicting connectivity between seasonal ranges in multiple populations of Alpine ibex (Capra ibex) as tools for conserving migration
<p># GPS locations of Alpine ibex</p> <p>This dataset contains migratory tracks of Alpine ibex identified using the application Migration Mapper (https://migrationinitiative.org/content/migration-mapper) and used in the work <strong>Identifying the environmental drivers of corridors and predicting connectivity between seasonal ranges in multiple populations of Alpine ibex (<em>Capra ibex</em>) as tools for conserving migration</strong></p> <p># Dataset structure</p> <p>Each row of the dataset represents a GPS location with its coordinates contained in the x (longitude) and y(latitude) columns. Coordinates are given in wgs84 (epsg 4326).<br> The column t1_ informs on the date and time the location was recorded.<br> The id and pop columns provide information about the identity of the animal and the population to which it belongs.</p> <p> </p>
Genetic evidence of a hybrid swarm between Alpine ibex (Capra ibex) and domestic goat (C. hircus)
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Data and scripts from: Long term analysis of social structure: evidence of age-based consistent associations in male Alpine ibex
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Data from: Climate drives body mass changes in a mountain ungulate: Shorter winters lead to heavier Alpine ibex
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Data from: Heterozygosity-fitness correlation at the major histocompatibility complex despite low variation in Alpine ibex (Capra ibex)
Crucial for the long-term survival of wild populations is their ability to fight diseases. Disease outbreaks can lead to severe population size reductions, which makes endangered and reintroduced species especially vulnerable. In vertebrates, the major histocompatibility complex (MHC) plays an important role in determining the immune response. Species which went through severe bottlenecks, often show very low levels of genetic diversity at the MHC. Due to the known link between the MHC and immune response, such species are expected to be at particular risk in case of disease outbreaks. However, so far, only few studies have shown that low MHC diversity is correlated with increased disease susceptibility in species after severe bottlenecks. We investigated genetic variation at the MHC and its correlations with disease resistance and other fitness related traits in Alpine ibex (Capra ibex), a wild goat species that underwent a strong bottleneck in the last century and that is known to have extremely low genetic variability, both genome-wide and at the MHC. We studied MHC variation in male ibex of Gran Paradiso National Park, the population used as source for all post-bottleneck reintroductions. We found that individual MHC heterozygosity (based on six microsatellites) was not correlated with genome-wide neutral heterozygosity. MHC heterozygosity, but not genome-wide heterozygosity, was positively correlated with resistance to infectious kerato-conjunctivitis and with body mass. Our results show that genetic variation at the MHC plays an important role in disease resistance and, hence, should be taken into account for successfully managing species conservation.
Data from: Horn growth variation and hunting selection of the Alpine ibex
Selective hunting can affect demographic characteristics and phenotypic traits of the targeted species. Hunting systems often involve harvesting quotas based on sex, age and/or size categories to avoid selective pressure. However, it is difficult to assess whether such regulations deter hunters from targeting larger "trophy" animals with longer horns that may have evolutionary consequences. Here, we compile 44,088 annually resolved and absolutely dated measurements of Alpine ibex (Capra ibex) horn growth increments from 8,355 males, harvested between 1978 and 2013, in the eastern Swiss Canton of Grisons. We aim to determine whether male ibex with longer horns were preferentially targeted, causing animals with early rapid horn growth to have shorter lives, and whether such hunting selection translated into long‐term trends in horn size over the past four decades. Results show that medium‐ to longer‐horned adult males had a higher probability of being harvested than shorter‐horned individuals of the same age and that regulations do affect the hunters' behaviour. Nevertheless, phenotypic traits such as horn length, as well as body size and weight, remained stable over the study period. Although selective trophy hunting still occurs, it did not cause a measurable evolutionary response in Grisons' Alpine ibex populations; managed and surveyed since 1978. Nevertheless, further research is needed to understand whether phenotypic trait development is coinfluenced by other, potentially compensatory factors that may possibly mask the effects of selective, long‐term hunting pressure.
On following pages: 180. Iberian Ibex (Capra pyrenaica); 181. Nubian Ibex (Capra nubiana); 182. Walia Ibex (Capra walie); 183. Alpine Ibex (Capra ibex); 184. Siberian Ibex (Capra sibirica); 185. Kuban Tur (Capra caucasica); 186. Daghestan Tur (Capra cylindricornis). in Bovidae
On following pages: 180. Iberian Ibex (Capra pyrenaica); 181. Nubian Ibex (Capra nubiana); 182. Walia Ibex (Capra walie); 183. Alpine Ibex (Capra ibex); 184. Siberian Ibex (Capra sibirica); 185. Kuban Tur (Capra caucasica); 186. Daghestan Tur (Capra cylindricornis).
Spring vegetation dynamics drive sex-specific migration propensity and fine-scale green-up tracking in Alpine ibex
<p># Data and srcipts used to perform analyses presented in the manuscript: "Spring vegetation dynamics drive sex-specific migration propensity and fine-scale green-up tracking in Alpine ibex"</p>
Data from: Heterozygosity-fitness correlation at the major histocompatibility complex despite low variation in Alpine ibex (Capra ibex)
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Data from: Inbreeding reduces long-term growth of Alpine ibex populations
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Data from: Horn growth variation and hunting selection of the Alpine ibex
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