Viser treff 229-248 av 370

    • Ocean climate and egg investment in the black-legged kittiwake Rissa tridactyla. 

      Barrett, Robert T.; Erikstad, Kjell E.; Reiertsen, Tone (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-14)
      Birds allocate substantial resources to their eggs during the laying period, resources also needed for other concurrent costly processes such as mate acquisition, nest building and site defence. Egg and clutch sizes may thus vary in response to food availability prior to egg laying. We investigated the variation in egg and clutch size of black-legged kittiwakes Rissa tridactyla in a North Norwegian ...
    • On a new species of Amphilochus from deep and cold Atlanic waters, with a note on the genus Amphilochopsis (Amphipoda, Gammaridea, Amphilochidae) 

      Tandberg, Anne Helene S.; Vader, Wim (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-23)
      <i>Amphilochus manudens</i> and <i>Amphilochopsis hamatus</i> are redescribed based on specimens from the BioIce, Mareano, and IceAGE programmes. Te new species <i>Amphilochus anoculus</i> <b>sp. n.</b> is described based on material from the IceAGE programme and the preceding BioIce programme; it is separated from the closely related <i>Amphilochus manudens</i> by the absence of eyes, a ...
    • On the identity and distribution of the rare Rymosia tolleti Burghele-Balacesco, 1965 (Diptera, Mycetophilidae) encountered in European caves 

      Kurina, Olavi; Kjærandsen, Jostein; Kirik, Heli; Hadbavná, Dominika; Dénes, Anna; Oboňa, Jozef; Manko, Peter (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-02)
      The identity and distribution of a neglected fungus gnat species, Rymosia tolleti Burghele-Balacesco, 1965, in Europe is reviewed based on examination of newly collected specimens as well as available museum materials. Rymosia tolleti is widespread but rather rare in Central Europe, with confirmed records from Romania, Slovakia, Germany, and France. All the specimens with known collection details ...
    • On the polar edge: the status of the northern gannet (Morus bassanus) in the Barents Sea in 2015-2016. 

      Barrett, Robert T.; Strøm, H.; Melnikov, Mikhail (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-27)
      During its population recovery in the North Atlantic in the early 1900s, the northern gannet (Morus bassanus) established its first colony in Norway at Runde in 1946. Since the 1960s, gannets have established (and later abandoned) several small colonies in the north of the country. These colonies have been regularly monitored, and in 2015–16 ca. 3300 apparently occupied nests (AON) were counted ...
    • Onisimus turgidus (Sars, 1879) (Amphipoda, Uristidae), an overlooked amphipod from sea anemones in Northern Norway 

      Vader, Wim; Johnsen, Jan Roger; Tandberg, Anne Helene S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-18)
      Two Norwegian uristid amphipods, obligate associates of sea anemones, have for a long time been confused sub nomine <i>Onisimus normani</i> Sars, 1890. In reality this species only occurs in south Norway, while the north-Norwegian material belongs to <i>O. turgidus</i> (Sars, 1879), described from the Barents Sea and for a long time forgotten. This paper fully illustrates both species, gives a key, ...
    • Optimal foraging in chick-raising Common Guillemots (Uria aalge) 

      Bugge, Julie; Barrett, Robert T.; Pedersen, Torstein (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      The Norwegian population of the Common Guillemot Uria aalge has declined by > 95% since the 1960s, and is classified as critically endangered in the Norwegian Red List. Much of the recent decline has been attributed to reduced food availability, but without extensive documentation of adult diet. Instead, chick diet has been considered a proxy of adult diet during the breeding season in many Norwegian ...
    • Orthopoxvirus DNA in Eurasian Lynx, Sweden 

      Tryland, Morten; Okeke, Malachy Ifeanyi; Hård af Segerstad, Carl; Mörner, Torsten; Traavik, Ingemar Terje; Ryser-Degiorgis, Marie-Pierre (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Cowpox virus, which has been used to protect humans against smallpox but may cause severe disease in immunocompromised persons, has reemerged in humans, domestic cats, and other animal species in Europe. Orthopoxvirus (OPV) DNA was detected in tissues (lung, kidney, spleen) in 24 (9%) of 263 free-ranging Eurasian lynx (Lynx lynx) from Sweden. Thymidine kinase gene amplicon sequences (339 bp) from ...
    • Otolitter fra saltvannsfisker i Nord-Norge 

      Breiby, Anne (Research report; Forskningsrapport, 1985)
      Drawings and descriptions of otloiths from 29 common marine fish species fron North Norway is presented. For 12 species the relationship between fish standard lenhgt and otolith lenghts is described by linear regression.
    • Paleoeconomy more than demography determined prehistoric human impact in Arctic Norway 

      Brown, Antony; Rijal, Dilli Prasad; Heintzman, Peter D.; Clarke, Charlotte, L.; Blankholm, Hans Peter; Høeg, Helge I.; Lammers, Youri; Bråthen, Kari Anne; Edwards, M E; Alsos, Inger Greve (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-07)
      Population size has increasingly been taken as the driver of past human environmental impact worldwide, and particularly in the Arctic. However, sedimentary ancient DNA (sedaDNA), pollen and archaeological data show that over the last 12,000 years, paleoeconomy and culture determined human impacts on the terrestrial ecology of Arctic Norway. The large Mortensnes site complex (Ceavccagea ¯dgi, 70◦N) ...
    • Paleoekolgiska undersökningar i samband med utvidgelse av E8 i Lavangsdalen 

      Sjøgren, Per Johan E (Research report; Forskningsrapport, 2013)
      Inför utvidgelsen av E8 i Lavangsdalen identifierades två fredade samiska kulturminneslokaliteter (Sametinget 2011) vilka delvis eller helt skulle förstöras i samband med utbyggningen och krävde vidare undersökningar. Det rörde sig om kulturspår från samisk renskötsel vilket i första hand gav sig uttryck som förändringar i dagens vegetation. För att få en förståelse av hur långt tillbaka i tiden den ...
    • Pannaria crispella comb. nov. and P. campbelliana Hue, two overlooked lichens from New Zealand 

      Elvebakk, Arve (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01)
      Psoroma sphinctrinum var. crispellum has been considered a synonym of Pannaria implexa, but it is a distinct species, recombined here as P. crispella. It forms a thin, filmy thallus on tree trunks, and consists of rounded, confluent squamules surrounded by a distinct black prothallus. The apothecia are initially simple with a well-defined central thalline plug. However, the plug soon expands into ...
    • Pannaria microphyllizans (Nyl.) P.M.Jørg. from New Zealand restudied and compared with P. athroophylla (Stirt.) Elvebakk & D.J.Galloway and the three new species Pannaria cassa, P. kantvilasii and P. wrightiorum 

      Elvebakk, Arve (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07)
      Pannaria microphyllizans, a previously misunderstood species, is shown here to have gibbose perispores with long-tailed apical extensions, and to lack TLC-detectable chemistry. It is related to P. athroophylla, a species with different phyllidia, a chemistry of isovicanicin and leprolomin, and spores of the same type but differing in several details. The latter has been too widely interpreted in ...
    • Pannaria pyxinoides comb. nov., an overlooked lichen from Northern New Zealand 

      Elvebakk, Arve (Journal article; Tidsskriftartikkel, 2018-07)
      The name <i>Psoroma pyxinoides</i>, which has been considered to be a synonym of <i>Pannaria sphinctrina</i>, is shown here to represent a distinct species, differing from <i>P. sphinctrina</i> by thallus characters and in spore and pycnidium morphology. Those characters indicate a relationship with <i>Pannaria allorhiza</i>. Like the latter species, <i>P. pyxinoides</i> is endemic to northern New ...
    • Paradulichia spinifera gurjanova, 1946 (Amphipoda, dulichiidae), a valid species? 

      Johansen, Per-Otto; Vader, Wim (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-11)
      Examination of Paradulichia-material collected from the Barents Sea during the Mareano cruises indicated that there are clear morphological differences between Paradulichia typica Boeck, 1871 from the Hardangerfjord, W. Norway and Paradulichia spinifera Gurjanova, 1946 from the Arctic. Based on our material and the original descriptions, these differences are the acute ventral parts of the body ...
    • Past Arctic aliens have passed away, current ones may stay 

      Alsos, Inger Greve; Ware, Christopher; Elven, Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-04)
      Increased human activity and climate change are expected to increase the numbers and impact of alien species in the Arctic, but knowledge of alien species is poor in most Arctic regions. Through field investigations over the last 10 years, and review of alien vascular plant records for the high Arctic Archipelago Svalbard over the past 130 years, we explored long term trends in persistence and ...
    • Pestplanten tromsøsvineblom Jacobaea alpina x subalpina i Norge - opphav og status 

      Alm, Torbjørn; Deschamps, Amandine Maria; Often, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      Jacobaea alpina (syn. Senecio alpinus, S. cordatus ) and J. subalpina (syn. Senecio subalpinus ) are native to the mountains of Central Europe. Both were cultivated as ornamentals in late 19th century Tromsø. From the early 1990’s onwards, numerous Jacobaea stands have been noticed outside gardens, in particular at Tromsø, but extending from Lenvik in central Troms northwards ...
    • Petter Dass: "Du skal ikke slå i hjel" - En folkemelodi med livskraft gjennom flere århundrer. 

      Graff, Ola (Journal article; Tidsskriftartikkel; Peer reviewed, 2022)
      In this article I will analyse the variants of the melody used for the song Petter Dass wrote around 1690 about the 5th commandment. There exist about 100 variants of this melody in different archives in Norway, but not in Sweden or Denmark. It is possible to follow the melody in oral tradition through the 19th and 18th centuries. We don’t know if the melody dates back to Petter Dass himself, ...
    • Plant biodiversity assessment through soil eDNA reflects temporal and local diversity 

      Ariza Salazar, Maria; Fouks, Bertrand; Mauvisseau, Quentin; Halvorsen, Rune; Alsos, Inger Greve; de Boer, Hugo (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-12)
      1. Several studies have shown the potential of eDNA-based proxies for plant identification, but little is known about their spatial and temporal resolution. This limits its use for plant biodiversity assessments and monitoring of vegetation responses to environmental changes. Here we calibrate the temporal and spatial plant signals detected with soil eDNA surveys by comparing with a standard visual ...
    • Plant DNA in sediments: to which degree do they represent the flora? 

      Alsos, Inger Greve; Coissac, Eric; Edwards, Mary E.; Merkel, Marie Kristine Føreid; Gielly, Ludovic; Sjögren, Per; Taberlet, Pierre; Yoccoz, Nigel Gilles (Conference object; Konferansebidrag, 2015-05)