Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2013
Authors
Perrine M. Fernandez Annette Dathe Shahid Nadeem Lars Bakken Esther Bloem Helen K. French Andrew BinleyAbstract
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Authors
Anne Falk ØgaardAbstract
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Authors
Anne-Kristin Løes Margrethe Askegaard Vibeke Langer Kirsi Partanen Sirli Pehme Ilse A. Rasmussen Eva Salomon Peter Sørensen Karin Ullvén Maria WivstadAbstract
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Authors
Gunnar Jansson Darius Danusevičius Helmut Grotehusman Jan Kowalczyk Diana Krajmerova Tore Skrøppa Heino WolfAbstract
Norway spruce (Picea abies (L.) Karst.) is one of the most important coniferous species in Europe both from an economic and ecological point of view. Solid wood products and pulp and paper products have the largest economic value. The patterns of variation observed in Norway spruce provenance trials show geographic variability on a large scale. Genetic variation is also present among offspring from natural populations within the same provenance region and among progenies from trees in the same population. This variation can often be larger than the variability among provenances. Tree improvement of Norway spruce started in Europe in the late 1940s. Breeding programmes were initiated in nearly all European countries but with different intensities. A common objective has been to create base material for seed procurement. Breeding objectives differ between countries, but most of them include adaptation and health, volume production and wood quality in some way. Genetic gains in volume per area unit from first round of seed orchards is around 10 % and from new seed orchards established with tested material expected to be between 20 and 25 %.
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Abstract
The mating system ofCapercaillie has been referred to as “exploded lek” because displaying males are spaced farther apart than on classical leks. However, inter-male distances and spacing behavior rarely have been quantified. In 2009–2011, we examined the spatial relationships of males on two leks in southeastern Norway by GPS satellite telemetry. Largely exclusive display territories (median 2 ha) surrounded the mating site, but the males spent most of the time displaying on smaller, well-defined display sites (median 182 m2) within their territories. When on their display sites, neighboring birds were spaced 64–212 m apart; decreasing to a minimum during the time of mating. Occasionally, males made long exploratory excursions (median 243 m) across the territories of neighbors, sometimes interacting with them at close distance (< 10m). During daytime, males resided solitarily in radially extending ranges within 1 km of the lek center, commuting to the lek either in the evening or morning by walking or flying, leaving in the morning mostly by walking. The distance from the lek center to night roosting trees and daytime resting areas decreased during the mating season. With interacting males and a spatial arrangement in-between that of classical leks and dispersed polygyny, the term “exploded lek” seems appropriate for the mating system of Capercaillie.
Authors
Rajko Vidrih Alena Gibalova M Korosec E Zlatic Janez Hribar Eivind VangdalAbstract
No abstract has been registered