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.
2003
Authors
Nina Hovden SætherAbstract
This report presents all livestock production systems in Norway that significantly contribute to the country’s food and agricultural production. It describes the regulatory framework for Norwegian agriculture and aquaculture, as well as characteristics of the country’s production conditions and breeding work. The report discusses national expertise in the field of farm animal genetic resources and future developments regarding the country’s use of these resources. Furthermore, the report presents the conservation of Norway’s historical breeds with small populations. It concludes by making recommendations on which areas both Norway and the Nordic countries should emphasize regarding R&D activities and capacity building..... Genetic resource centre.
Authors
R. Ozolincius Kestutis Armolaitis I. Varnagiryte J. ZenkovaiteAbstract
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M. Mandre K. Ots J. KlõseikoAbstract
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Abstract
During the first half of the 1990-ies, the microlepidopteran Argyresthia retinella Zeller (Lepidoptera: Yponomeutidae) had an outbreak in mountain birch (Betula pubescens Ehrh. ssp. czerepanovii (Orlova) Hamet-Ahti) forests along the coast of northern Norway. In these regions, A. retinella has a univoltine life history and passes the winter as diapausing eggs, contradictory to previous reports from more southern latitudes of Europe, where newly hatched larvae overwinter. Eggs were deposited under lichen, mainly on branches and twigs, and avoided freezing by their ability to supercool. The mean supercooling points (SCPs) from October to March ranged between -35.5 and -36.5 C (lowest in January), and the eggs did not survive exposure below these temperatures. Diapause was terminated in the middle of February, and in April and May the SCP rose to about -30 C. Pre-freeze mortality was evident and had a significant impact on survival when eggs were exposed to temperatures above the SCP.
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