Search Results - "Stien, A."

Cohort variation in individual body mass dissipates with age in large herbivores by Hamel, S., Gaillard, J.-M., Yoccoz, N. G., Albon, S., Côté, S. D., Craine, J. M., Festa-Bianchet, M., Garel, M., Lee, P., Moss, C., Nussey, D. H., Pelletier, F., Stien, A., Tveraa, T.

“…Environmental conditions experienced during early growth and development markedly shape phenotypic traits. Consequently, individuals of the same cohort may…”
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The role of parasites in the dynamics of a reindeer population by Albon, S. D., Stien, A., Irvine, R. J., Langvatn, R., Ropstad, E., Halvorsen, O.

“…we found that anthelminthic treatment in April–May increased the probability of a reindeer having a calf in the next year, compared with untreated controls…”
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High seasonal overlap in habitat suitability in a non-migratory High Arctic ungulate by Pedersen, Å.Ø., Soininen, E.M., Hansen, B.B., Le Moullec, M., Loe, L.E., Paulsen, I.M.G., Eischeid, I., Karlsen, S.R., Ropstad, E., Stien, A., Tarroux, A., Tømmervik, H., Ravolainen, V.

“…Understanding drivers of space use and habitat selection is essential for management and conservation, especially under rapid environmental change. Here, we…”
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The Impact of Gastrointestinal Nematodes on Wild Reindeer: Experimental and Cross-Sectional Studies by Stien, A., Irvine, R. J., Ropstad, E., Halvorsen, O., Langvatn, R., Albon, S. D.

“…1. It is well known that gastrointestinal nematodes can have a significant impact on the growth of farmed ruminants. The clinical signs of these parasites are…”
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Echinococcus multilocularis in Svalbard, Norway: Microsatellite genotyping to investigate the origin of a highly focal contamination by Knapp, J., Staebler, S., Bart, J.M., Stien, A., Yoccoz, N.G., Drögemüller, C., Gottstein, B., Deplazes, P.

“…► High similarity was found amongst the Svalbardian E. multilocularis samples as described in previous field scale sampling. ► The Svalbardian E…”
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Intestinal parasites of the Arctic fox in relation to the abundance and distribution of intermediate hosts by Stien, A, Voutilainen, L, Haukisalmi, V, Fuglei, E, Mørk, T, Yoccoz, N G, Ims, R A, Henttonen, H

“…The intestinal parasite community of Arctic foxes (Vulpes lagopus) on the Svalbard archipelago in the High Arctic was investigated in relation to the abundance…”
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The effect of warble flies on reindeer fitness: a parasite removal experiment by Ballesteros, M., Bårdsen, B.-J., Langeland, K., Fauchald, P., Stien, A., Tveraa, T.

“…Parasites extract part or all their resources from their host depriving them of energy that could be normally used for growth, self‐maintenance or…”
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Combined effects of long-term feeding, population density and vegetation green-up on reindeer demography by Ballesteros, M, Bårdsen, B.-J, Fauchald, P, Langeland, K, Stien, A, Tveraa, T

“…Large herbivores living in seasonal environments are generally food-limited through density dependence and climatic factors. This may result in starvation and…”
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Testing Five Hypotheses of Sexual Segregation in an Arctic Ungulate by Loe, Leif Egil, Irvine, R. Justin, Bonenfant, Christophe, Stien, Audun, Langvatn, Rolf, Albon, Steve D., Mysterud, Atle, Nils Chr. Stenseth

“…1. Sexual segregation occurs in most species of sexually dimorphic ungulates. At least five not mutually exclusive hypotheses have been formulated to explain…”
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Spring climate and summer otolith growth in juvenile Arctic charr, Salvelinus alpinus by Godiksen, J. A., Borgstrøm, R., Dempson, J. B., Kohler, J., Nordeng, H., Power, M., Stien, A., Svenning, M.-A.

“…The influence of different climate variables on the first four years of otolith growth in Salangen Arctic charr, Salvelinus alpinus , was studied over the…”
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Valproate affects reproductive endocrine function, testis diameter and some semen variables in non-epileptic adolescent goat bucks by Krogenæs, A.K., Taubøll, E., Stien, A., Oskam, I.C., Lyche, J.L., Dahl, E., Thomassen, R.F., Sweeney, T., Ropstad, E.

“…Valproate (VPA) is a major antiepileptic drug with a broad spectrum of antiepileptic activity. There is, however, increasing concern about the possible effects…”
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Faecal Avoidance and the Risk of Infection by Nematodes in a Natural Population of Reindeer by van der Wal, R., Irvine, J., Stien, A., Shepherd, N., Albon, S. D.

“…We tested whether Svalbard reindeer (Rangifer tarandus platyrhynchus) minimise the risk of gastrointestinal nematode infection by avoiding patches with a high…”
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Antler length of yearling red deer is determined by population density, weather and early life-history by Schmidt, K.T, Stien, A, Albon, S.D, Guinness, F.E

“…In red deer, yearling antler length is a largely nutrition-mediated phenotypic character, and is therefore sometimes used as an indirect estimate of range…”
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Sex ratio variation in gastrointestinal nematodes of Svalbard reindeer; density dependence and implications for estimates of species composition by Stien, A, Dallimer, M, Irvine, R J, Halvorsen, O, Langvatn, R, Albon, S D, Dallas, J F

“…Estimates of the intensity and abundance of species provide essential data for ecological, evolutionary and epidemiological studies of gastrointestinal…”
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Life-history strategies and population dynamics of abomasal nematodes in Svalbard reindeer (Rangifer tarandus platyrhynchus) by Irvine, R J, Stien, A, Halvorsen, O, Langvatn, R, Albon, S D

“…The observation that the total abundance of adult nematodes in the abomasum of Svalbard reindeer increases between October and April suggests adaptation to…”
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Evidence for continued transmission of parasitic nematodes in reindeer during the Arctic winter by Halvorsen, O, Stien, A, Irvine, J, Langvatn, R, Albon, S

“…Living in the high Arctic, the Svalbard reindeer ( Rangifer tarandus platyrhynchus) and its trichostrongyle nematodes experience a long cold winter from…”
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Contrasting regulation of fecundity in two abomasal nematodes of Svalbard reindeer (Rangifer tarandus platyrhynchus) by Irvine, R J, Stien, A, Dallas, J F, Halvorsen, Langvatn, R, Albon, S D

“…Stability of trichostrogylid populations indicates that some form of density-dependent regulation occurs which could act through fecundity. We present evidence…”
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Plasma Urea, Creatinine, and Urea:Creatinine Ratio in Reindeer (Rangifer tarandus tarandus) and in Svalbard Reindeer (Rangifer tarandus platyrhynchus) during Defined Feeding Conditions and in the Field by Säkkinen, H., Stien, A., Holand, Ø., Hove, K., Eloranta, E., Saarela, S., Ropstad, E.

“…Variation in plasma urea and creatinine concentration and plasma urea:creatinine ratio (U:C) were studied in semidomestic free‐ranging reindeer (Rangifer…”
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The population dynamics of Ostertagia gruehneri in reindeer: a model for the seasonal and intensity dependent variation in nematode fecundity by STIEN, A, IRVINE, R. J, LANGVATN, R, ALBON, S. D, HALVORSEN, O

“…The gastrointestinal nematode Ostertagia gruehneri is a parasite of reindeer that can have a significant impact on host population dynamics. To gain a better…”
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A stage-structured Bayesian hierarchical model for salmon lice populations at individual salmon farms – Estimated from multiple farm data sets by Aldrin, M., Huseby, R.B., Stien, A., Grøntvedt, R.N., Viljugrein, H., Jansen, P.A.

“…•We present a mechanistic, stage-structured population model for salmon lice.•All model parameters are estimated from full scale production data.•The model may…”
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