Up to 20 new salmon stocks found in the Teno River, Finland
Finnish researchers at the University of Turku and Finnish Game and Fisheries Research Institute have discovered that salmon in the Teno River (Tana in Norwegian) comprise not just one, but up to 20 separate populations.
Using evolutionary genetic methods, Juha-Pekka Vähä and Professor Craig Primmer discovered that salmon from tributaries such as Pulmanki, Utsjoki and Iesjoki are so genetically different from each other, they can be considered as completely separate stocks.
The finding confirms what many local fishermen and indeed researchers have long suspected, and has important implications for salmon conservation in Finland as until now, it had been assumed that the number of naturally reproducing Finnish salmon stock was just 4 – Teno, Näätämö (Neiden in Norwegian), Tornio (Torneå in Swedish) and Simo. 32 former Finnish salmon populations have gone extinct. “Our results show that the number of Finnish salmon populations is actually much higher than four, as the tributaries of Teno can actually be considered as separate populations which are genetically more different than the salmon of many Baltic Sea salmon rivers are from each other, even though the Baltic rivers are separated by hundreds of kilometres, and the Teno tributaries by just tens” said Vähä who conducted the research as a part of his PhD thesis.
The researchers also found that the presence of large, multi sea-winter fish in a population was important for the genetic diversity of a population. “Overall, the findings of our study emphasise the large contribution of Teno salmon to Finnish salmon biodiversity, and provide useful information for the management and conservation of this valuable natural resource.” continued Vähä.
A scientific article reporting the results of Vähä and Primmer’s findings, in collaboration with Jaakko Erkinaro and Eero Niemelä from the Finnish Game and Fisheries Research Institute, has been recently published in the international science journal – Molecular Ecology.
The Maj and Tor Nessling funded project is one of a number of applied evolutionary genetics projects carried out in Primmer’s research group, which is a part of the Centre of Excellence in Evolutionary Genetics and Physiology funded by the Academy of Finland.
Niko Rinta | alfa
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...