Experts and Doctors on reproduction in Norway


Locale: Norway
Topic: reproduction

Top Publications

  1. Loe L, Mysterud A, Veiberg V, Langvatn R. Negative density-dependent emigration of males in an increasing red deer population. Proc Biol Sci. 2009;276:2581-7 pubmed publisher
    ..Contrasting patterns reported in small-scale studies are suggestive that spatial scale of density variation may affect the pattern of temporal density dependence in emigration rates and distances. ..
  2. Kobayashi T, Pakarinen P, Torgersen J, Huhtaniemi I, Andersen Ø. The gonadotropin receptors FSH-R and LH-R of Atlantic halibut (Hippoglossus hippoglossus)--2. Differential follicle expression and asynchronous oogenesis. Gen Comp Endocrinol. 2008;156:595-602 pubmed publisher
    ..Hence, the sequential gonadotropic activation of ovarian follicle growth and maturation in repetitive spawners is probably regulated by modulating the temporal expression of FSH-R and LH-R in the follicle membrane. ..
  3. Tveraa T, Stien A, BÃ¥rdsen B, Fauchald P. Population densities, vegetation green-up, and plant productivity: impacts on reproductive success and juvenile body mass in reindeer. PLoS ONE. 2013;8:e56450 pubmed publisher
    ..Nor did we detect a negative mismatch between early springs and subsequent recruitment. Effects of global warming on plant productivity and onset of spring is likely to positively affect sub-Arctic reindeer. ..
  4. Hössjer O, Tyvand P. A monoecious and diploid Moran model of random mating. J Theor Biol. 2016;394:182-196 pubmed publisher
    ..Although fIS has a stable fixed point that only depends on the degree of selfing, the normally distributed oscillations around this fixed point are stochastically larger for the Moran than for the WF model. ..
  5. Hansen B, Altin D, Hessen K, Dahl U, Breitholtz M, Nordtug T, et al. Expression of ecdysteroids and cytochrome P450 enzymes during lipid turnover and reproduction in Calanus finmarchicus (Crustacea: Copepoda). Gen Comp Endocrinol. 2008;158:115-21 pubmed publisher
    ..The CYP301A1 was more highly expressed in males and post-spawning females, and may be involved in ecdysteroid degradation since these groups also exhibited the lowest ecdysteroid concentrations. ..
  6. Zörgö E, Chwialkowska K, Gjuvsland A, Garre E, Sunnerhagen P, Liti G, et al. Ancient evolutionary trade-offs between yeast ploidy states. PLoS Genet. 2013;9:e1003388 pubmed publisher
    ..Taken together, our findings unmasked a dynamic interplay between ploidy and ecology that was of unpredicted evolutionary importance and had multiple molecular roots. ..
  7. Pettorelli N, Weladji R, Holand O, Mysterud A, Breie H, Stenseth N. The relative role of winter and spring conditions: linking climate and landscape-scale plant phenology to alpine reindeer body mass. Biol Lett. 2005;1:24-6 pubmed
    ..This study underlines the major impact of winter and spring climatic conditions, determining the spring and summer food availability, and the subsequent growth of calves among alpine herbivores. ..
  8. Bårdsen B, Tveraa T. Density-dependence vs. density-independence - linking reproductive allocation to population abundance and vegetation greenness. J Anim Ecol. 2012;81:364-76 pubmed publisher
  9. Garmo R, Waage S, Sviland S, Henriksen B, Østerås O, Reksen O. Reproductive performance, udder health, and antibiotic resistance in mastitis bacteria isolated from Norwegian Red cows in conventional and organic farming. Acta Vet Scand. 2010;52:11 pubmed publisher
    ..5% in conventional herds and 46.5% in organic herds. There were no large differences between reproductive performance and udder health between conventional and organic farming for Norwegian Red cows. ..

More Information


  1. Ordiz A, Støen O, Swenson J, Kojola I, Bischof R. Distance-dependent effect of the nearest neighbor: spatiotemporal patterns in brown bear reproduction. Ecology. 2008;89:3327-35 pubmed
    ..Previously, similar population regulation mechanisms have been found only in group-living mammals. Thus, social interactions and behavior in solitary carnivores may be more flexible than usually assumed. ..
  2. Zedrosser A, Pelletier F, Bischof R, Festa Bianchet M, Swenson J. Determinants of lifetime reproduction in female brown bears: early body mass, longevity, and hunting regulations. Ecology. 2013;94:231-40 pubmed
    ..We suggest that, in many hunted populations of large mammals, sport harvest is an important influence on both population dynamics and life histories. ..
  3. Olsen H, Hayes B, Kent M, Nome T, Svendsen M, Larsgard A, et al. Genome-wide association mapping in Norwegian Red cattle identifies quantitative trait loci for fertility and milk production on BTA12. Anim Genet. 2011;42:466-74 pubmed publisher
    ..The other reproduction QTL did not have pleiotropic effects on milk production, and these are therefore of considerable interest for use in marker-assisted selection. ..
  4. Ten Tusscher K, Hogeweg P. The role of genome and gene regulatory network canalization in the evolution of multi-trait polymorphisms and sympatric speciation. BMC Evol Biol. 2009;9:159 pubmed publisher
    ..We hypothesize that, as genotypic canalization enables differentiation despite random mating and increases the effectiveness of assortative mating, sympatric speciation is more likely than is commonly suggested. ..
  5. Zedrosser A, Dahle B, Støen O, Swenson J. The effects of primiparity on reproductive performance in the brown bear. Oecologia. 2009;160:847-54 pubmed publisher
    ..Cub loss in these periods was independent and caused by different factors. Cub loss before the mating season seemed to be most influenced by food conditions, whereas that during the mating season appeared to be caused by SSI. ..
  6. Jørgensen C, Dunlop E, Opdal A, Fiksen O. The evolution of spawning migrations: state dependence and fishing-induced changes. Ecology. 2008;89:3436-48 pubmed
    ..The effects were most pronounced for the homing behavior. ..
  7. Derocher A, Wolkers H, Colborn T, Schlabach M, Larsen T, Wiig Ø. Contaminants in Svalbard polar bear samples archived since 1967 and possible population level effects. Sci Total Environ. 2003;301:163-74 pubmed
  8. Yoccoz N, Bustnes J, Bangjord G, Skaare J. Reproduction and survival of tawny owls in relation to persistent organic pollutants. Environ Int. 2009;35:107-12 pubmed publisher
  9. Jonsson B, Jonsson N. A review of the likely effects of climate change on anadromous Atlantic salmon Salmo salar and brown trout Salmo trutta, with particular reference to water temperature and flow. J Fish Biol. 2009;75:2381-447 pubmed publisher
    ..Future research challenges are summarized at the end of the paper. ..
  10. van Beest F, Rivrud I, Loe L, Milner J, Mysterud A. What determines variation in home range size across spatiotemporal scales in a large browsing herbivore?. J Anim Ecol. 2011;80:771-85 pubmed publisher
  11. Bårdsen B, Fauchald P, Tveraa T, Langeland K, Yoccoz N, Ims R. Experimental evidence of a risk-sensitive reproductive allocation in a long-lived mammal. Ecology. 2008;89:829-37 pubmed
    ..The ability of individuals to track their environment and the concordant risk-sensitive adjustment of reproductive allocation may render subarctic reindeer more resilient to climate change than previously supposed...
  12. Odden M, Wegge P. Predicting spacing behavior and mating systems of solitary cervids: a study of hog deer and Indian muntjac. Zoology (Jena). 2007;110:261-70 pubmed
    ..Body mass appeared to be a suitable predictor of intraspecific patterns in space use but a poor predictor of interspecific patterns, probably due to a confounding effect of habitat productivity. ..
  13. Asare N, Instanes C, Sandberg W, Refsnes M, Schwarze P, Kruszewski M, et al. Cytotoxic and genotoxic effects of silver nanoparticles in testicular cells. Toxicology. 2012;291:65-72 pubmed publisher
  14. Engen S, Lande R, Saether B, Festa Bianchet M. Using reproductive value to estimate key parameters in density-independent age-structured populations. J Theor Biol. 2007;244:308-17 pubmed
    ..We illustrate the method by estimating the long-run growth rate and the environmental variance in an exponentially growing population of Bighorn Sheep...
  15. Skjæraasen J, Nash R, Korsbrekke K, Fonn M, Nilsen T, Kennedy J, et al. Frequent skipped spawning in the world's largest cod population. Proc Natl Acad Sci U S A. 2012;109:8995-9 pubmed publisher
    ..The same may hold for other teleosts. ..
  16. Kauserud H, Heegaard E, Büntgen U, Halvorsen R, Egli S, Senn Irlet B, et al. Warming-induced shift in European mushroom fruiting phenology. Proc Natl Acad Sci U S A. 2012;109:14488-93 pubmed publisher
    ..Extension of the European fungal fruiting season parallels an extended vegetation season in Europe. Changes in fruiting phenology imply changes in mycelia activity, with implications for ecosystem function. ..
  17. Sanden M, Jørgensen S, Hemre G, Ørnsrud R, Sissener N. Zebrafish (Danio rerio) as a model for investigating dietary toxic effects of deoxynivalenol contamination in aquaculture feeds. Food Chem Toxicol. 2012;50:4441-8 pubmed publisher
    ..We do not know if effects observed on fecundity and larvae swimming activity are attributed to a direct interaction of DON with the reproductive organ or secondary to the maternal/paternal liver oxidative imbalance. ..
  18. Skjærvø G, Røskaft E. Menopause: no support for an evolutionary explanation among historical Norwegians. Exp Gerontol. 2013;48:408-13 pubmed publisher
    ..Finally, we discuss an alternative point of view suggesting that menopause might be understood in the light of both ageing in general as well as our increased lifespan. ..
  19. Hurem S, Gomes T, Brede D, Lindbo Hansen E, Mutoloki S, Fernandez C, et al. Parental gamma irradiation induces reprotoxic effects accompanied by genomic instability in zebrafish (Danio rerio) embryos. Environ Res. 2017;159:564-578 pubmed publisher
    ..The results therefore highlight the necessity for multi- and transgenerational studies to assess the environmental impact of gamma radiation. ..
  20. Soleng A, Bakke T. The susceptibility of grayling (Thymallus thymallus) to experimental infections with the monogenean Gyrodactylus salaris. Int J Parasitol. 2001;31:793-7 pubmed
    ..salaris. The grayling is interpreted as unable to sustain G. salaris in nature which implies that G. thymalli is not conspecific with G. salaris. However, G. salaris dispersal by grayling cannot be excluded...
  21. Meirmans S, Meirmans P, Kirkendall L. The costs of sex: facing real-world complexities. Q Rev Biol. 2012;87:19-40 pubmed
    ..Interestingly, our study suggests that, in some species, no general benefits to sex and recombination might be needed to understand the maintenance of sex, as in our case study of dandelions. ..
  22. Eide N, Stien A, Prestrud P, Yoccoz N, Fuglei E. Reproductive responses to spatial and temporal prey availability in a coastal Arctic fox population. J Anim Ecol. 2012;81:640-8 pubmed publisher
    ..We suggest this may be caused by a lack of unoccupied dens and a saturated population...
  23. Levsen A, Jakobsen P. Selection pressure towards monoxeny in Camallanus cotti (Nematoda, Camallanidac) facing an intermediate host bottleneck situation. Parasitology. 2002;124:625-9 pubmed
    ..cotti to carry out a direct life-cycle is favoured by selection in order to avoid extinction whenever copepods are absent. It still remains unknown, however, whether the parasite shows the same characteristics in the wild...
  24. Nygard T, Gjershaug J. The effects of low levels of pollutants on the reproduction of golden eagles in western Norway. Ecotoxicology. 2001;10:285-90 pubmed
    ..Our data-set on reproductive output is, however, too small to establish a general relationship between DDE contamination and reproductive output in golden eagles...