Search Results - "B.-E. Sæther"

Estimating Density Dependence, Environmental Variance, and Long-Term Selection on a Stage-Structured Life History by Lande, R, Grøtan, V, Engen, S, Visser, M E, Sæther, B-E

“…AbstractA method for analyzing long-term demographic data on density-dependent stage-structured populations in a stochastic environment is derived to…”
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Effective size of density‐dependent two‐sex populations: the effect of mating systems by Myhre, A. M., Engen, S., SÆther, B.‐E.

“…Density dependence in vital rates is a key feature affecting temporal fluctuations of natural populations. This has important implications for the rate of…”
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Spatial variation in senescence rates in a bird metapopulation by Holand, H, T. Kvalnes, M. Gamelon, J. Tufto, H. Jensen, H. Pärn, T. H. Ringsby, B.-E. Sæther

“…Investigating factors which affect the decline in survival with age, i.e. actuarial senescence, is important in order to understand how demographic rates vary…”
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Population Dynamical Consequences of Climate Change for a Small Temperate Songbird by B.-E. Sæther, Tufto, J., Engen, S., Jerstad, K., Røstad, O. W., Skåtan, J. E.

“…Predicting the effects of an expected climatic change requires estimates and modeling of stochastic factors as well as density-dependent effects in the…”
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Insights into the genetic architecture of morphological traits in two passerine bird species by Silva, C N S, McFarlane, S E, Hagen, I J, Rönnegård, L, Billing, A M, Kvalnes, T, Kemppainen, P, Rønning, B, Ringsby, T H, Sæther, B-E, Qvarnström, A, Ellegren, H, Jensen, H, Husby, A

“…Knowledge about the underlying genetic architecture of phenotypic traits is needed to understand and predict evolutionary dynamics. The number of causal loci,…”
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Effects of density-dependence and climate on the dynamics of a Svalbard reindeer population by Solberg, E. J., Jordhøy, P., Strand, O., Aanes, R., Loison, A., Sæther, B.-E., Linnell, J. D. C.

“…To determine the main factors affecting the population dynamics of Svalbard reindeer, we analysed 21 yr of annual censuses, including data on population size,…”
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Parasite prevalence increases with temperature in an avian metapopulation in northern Norway by Holand, H, Jensen, H, Kvalnes, T, Tufto, J, Pärn, H, Sæther, B-E, Ringsby, T H

“…Climate and weather conditions may have substantial effects on the ecology of both parasites and hosts in natural populations. The strength and shape of the…”
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Estimating fluctuating selection in age‐structured populations by ENGEN, S., SÆTHER, B.‐E., KVALNES, T., JENSEN, H.

“…In age‐structured populations, viability and fecundity selection of varying strength may occur in different age classes. On the basis of an original idea by…”
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Sexual variation in heritability and genetic correlations of morphological traits in house sparrow (Passer domesticus) by Jensen, H., Sæther, B.‐E., Ringsby, T. H., Tufto, J., Griffith, S. C., Ellegren, H.

“…Estimates of genetic components are important for our understanding of how individual characteristics are transferred between generations. We show that the…”
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Estimating the ratio of effective to actual size of an age-structured population from individual demographic data by Engen, S, Lande, R, Sæther, B.-E, Gienapp, P

“…The effective population size is a central concept for understanding evolutionary processes in a finite population. We employ Fisher's reproductive value to…”
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Environmental stochasticity and population dynamics of large herbivores: a search for mechanisms by SAETHER, B.-E

“…Recently, the results from several long-term individual-based population studies of ungulates have been published. One major conclusion is that the population…”
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Estimating Density Dependence from Population Time Series Using Demographic Theory and Life‐History Data by Lande, R., Engen, S., Sæther, B.‐E., Filli, F., Matthysen, E., Weimerskirch, H.

“…For populations with a density‐dependent life history reproducing at discrete annual intervals, we analyze small or moderate fluctuations in population size…”
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Lower survival probability of house sparrows severely infected by the gapeworm parasite by Holand, H, Jensen, H, Tufto, J, Soliman, M, Pärn, H, Sæther, B.-E, Ringsby, T. H

“…The effect of parasites in natural populations has received increasing attention in recent years. Studies have shown that parasites may play an important part…”
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Genetic discontinuities in a continuously distributed and highly mobile ungulate, the Norwegian moose by Haanes, H., Røed, K. H., Solberg, E. J., Herfindal, I., Sæther, B.-E.

“…Many species with currently continuously distributed populations have histories of geographic range shifts and successive shifts between decline or…”
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Effective size of harvested ungulate populations by Sæther, B.-E, Engen, S, Solberg, E.J

“…The harvest of ungulate populations is often directed against certain sex or age classes to maximize the yield in terms of biomass, number of shot animals or…”
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Effects of Density-Dependence and Climate on the Dynamics of a Svalbard Reindeer Population by Solberg, E. J., Jordhøy, P., Strand, O., Aanes, R., Loison, A., B.-E. Sæther, Linnell, J. D. C.

“…To determine the main factors affecting the population dynamics of Svalbard reindeer, we analysed 21 yr of annual censuses, including data on population size,…”
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Dynamics of a Harvested Moose Population in a Variable Environment by Solberg, Erling Johan, Saether, Bernt-Erik, Strand, Olav, Loison, Anne

“…1. Population size, calves per female, female mean age and adult sex ratio of a moose (Alces alces) population in Vefsn, northern Norway were reconstructed…”
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Estimating density dependence in time–series of age–structured populations by Lande, R., Engen, S., Sæther, B.-E.

“…were in the order of 1 or higher, indicating strong, statistically significant density dependence in four of the six species…”
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Sex Biases in Avian Dispersal: A Reappraisal by Clarke, Alice L., Sæther, Bernt-Erik, Røskaft, Eivin

“…We reviewed the avian literature for quantitative studies of sex biases in dispersal and found continued and strengthened support for the general pattern of…”
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Life‐History Variation Predicts the Effects of Demographic Stochasticity on Avian Population Dynamics by Sæther, Bernt‐Erik, Engen, Steinar, Pape Møller, Anders, Weimerskirch, Henri, Visser, Marcel E., Fiedler, Wolfgang, Matthysen, Erik, Lambrechts, Marcel M., Badyaev, Alexander, Becker, Peter H., Brommer, Jon E., Bukacinski, Dariusz, Bukacinska, Monika, Christensen, Hans, Dickinson, Janis, du Feu, Chris, Gehlbach, Frederick R., Heg, Dik, Hötker, Hermann, Merilä, Juha, Tøttrup Nielsen, Jan, Rendell, Wallace, Robertson, Raleigh J., Thomson, David L., Török, János, Van Hecke, Piet

“…Comparative analyses of avian population fluctuations have shown large interspecific differences in population variability that have been difficult to relate…”
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