Browsing by Subject "Red deer"

Now showing 1 - 4 of 4
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    Astas, esqueleto y edad del ciervo (Cervus elaphus hispanicus) de Sierra Morena oriental: Estudio de correlación
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 2002) Azorit, Concepción; Analla, Mohamed; Carrasco, Rafael; Carrasco, Antonio; Muñoz-Cobo, Joaquín; Sin departamento asociado; Facultad de Biología
    Se realiza un estudio de correlación entre algunas dimensiones del esqueleto, cuernas y edad del ciervo (Cervus elaphus hispanicus) de Sierra Morena Oriental, y se aporta información preliminar sobre la conformación general de las astas en esta zona. Para ello, se miden las apófisis frontales, las mandíbulas y las astas de 135 ciervos caza dos entre 1993 y 1997. La edad, que oscila entre los 18 y los 149 meses, se obtuvo a partir de cortes histológicos de molares (M1). Los resultados obtenidos indican una alta correlación entre las medidas de longitud mandibular, altura de apófisis frontales y astas, siendo tam bién significativa la correlación con la edad. La correlación entre cada rama de la cuerna, derecha e izquierda, fue estadísticamente signifi cativa, aunque en mayor medida en lo referente al grosor que en lo referente a la longitud o el número de puntas
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    Ontogenesis of the omasum: a comparative analysis of the Merino sheep and Iberian red deer
    (F. Hernández y J.F. Madrid. Murcia: Universidad de Murcia, Departamento de Biología Celular e Histología., 2011) Redondo, E.; Masot, Javier; García, Angela; Franco, A.
    The aim of this study is to describe differences in the ontogenesis of the omasum in sheep (domestic ruminant) and deer (wild ruminant). A total of 50 embryos and fetuses of Merino sheep and 50 Iberian deer were used, from the first stages of prenatal life until birth. For the study, the animals were divided into five experimental groups according to the most relevant histological characteristics. The appearance of the omasum from the primitive gastric tube was earlier in sheep (22% gestation, 33 days) than in deer (25% gestation, 66 days). In both cases it displayed a primitive epithelium of a stratified, cylindrical, non-ciliary type. The appearance of four laminae of different sizes was always earlier in sheep than deer. At around 36% gestation in sheep (53 days) and 36% (97 days) in deer, the omasum consisted of 4 clearly-differentiated layers: mucosa (with epithelial layer and lamina propria), submucosa, tunica muscularis and serosa. The temporal order of appearance of the four order laminae and omasal papillae was always earlier in sheep than deer. The tegumentary mucosa of the omasum was without secretion capability in the first embryonic phases. From 67 days (26% gestation) the neutral mucopolysaccharides appeared in deer and at 46 days (30% gestation) in sheep. In both cases they continued to decrease until birth, this decrease being more pronounced in deer. Finally, the presence of neuroendocrine and glial cells was detected in deer at earlier stages than in sheep.
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    Spatio-temporal patterns of sarcoptic mange in red deer and Iberian ibex in a multi-host natural park
    (Elsevier Ltd., 2019-11-27) Iacopelli, F.; Fanelli, A.; Tizzani, P.; Berriatua, E.; Prieto, P.; Martinez-Carrasco, C.; León-Vizcaíno, L.; Rossi, L.; Candela, M. G.; Sanidad Animal; Management of Environment and Forests, Faculty of Agriculture, University of Bari, 70100 Bari, Italy; Department of Veterinary Sciences, University of Turin, 10090 Grugliasco, Italy
    The reliance on multiple hosts to survive is what makes the management and control of multi-host infectious agents challenging. Sarcoptes scabiei causes sarcoptic mange in a wide range of mammal species with ungulates being an important host. Little is known about the role different ungulates play in sustaining endemic transmission of the disease and no study has yet to describe the long-term multi-host sarcoptic infestation dynamics in free-ranging wildlife. Here, we explore 24 years of sarcoptic mange infestation data for two Mediterranean ungulate species, red deer and Iberian ibex, living in the Sierras de Cazorla, Segura y Las Villas Natural Park of southern Spain. The temporal analysis showed a clear seasonal pattern of infestation in both ungulates with a peak in early spring and a decline throughout the summer. The spatial analysis, however, showed that caprinae rather than cervidae is the most competent host for sarcoptic mange spreading and persistence. Considering that few studies have described the spatio-temporal pattern of mange outbreaks for long periods of time, the information reported in this work aims to improve our understanding of sarcoptic mange epizootic in wild ruminant populations.
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    Wild ungulate density data generated by camera trapping in 37 European areas: first output of the European Observatory of Wildlife (EOW)
    (Wiley, 2023-03-27) Martínez-Carrasco Pleite, Carlos; ENETWILD-consortium, "et.al."; Sanidad Animal; Facultad de Veterinaria
    The European Observatory of Wildlife (EOW) as part of the ENETWILD project, aims to improve the European capacity for monitoring wildlife populations, implementing international standards for data collection, providing guidance on wildlife density estimation, and finally, to promote collaborative, open data networks to develop wildlife monitoring, initially focusing on terrestrial wild mammals. This report presents density estimates for species that are widely distributed (wild boar (Sus scrofa), European roe deer (Capreolus capreolus), red deer (Cervus elaphus)) by following a standardised camera trapping (CT) protocol, in 48 areas from 28 different countries in Europe, during 2022. Density values are provided for 37 areas from 20 countries, while an additional 9 locations from 8 countries are currently completing the data analysis. The EOW involved different stakeholders over most European countries, which resulted for the first time in a number of reliable (known precision) wild ungulate density estimates, from areas representing different European bioregions. These estimates are the result of a collaborative effort from the network to apply practical systematic and rigorous protocols. The results presented from the first pilot campaign of the EOW cannot be used to accurately describe wildlife population gradients and trends at European level but can be used as first baseline data for future trend analyses. Our results show data gaps, but also provide relevant insights into some of the main drivers of demographic evolution of wild ungulate populations in Europe. We will expand and improve the EOW in the future to include more representative sites. The Agouti app, including photogrammetry methods to estimate CT detection zone size and animal speed of movement using a computer vision process proved useful to reduce the workload and to improve objectivity of measurements for REM method. We discuss the results obtained by the 2022 campaign in relation to the specific objectives of the EOW and propose the next steps.