Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Up to 20 new salmon stocks found in the Teno River, Finland

11.07.2007
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
Further information:
http://www.aka.fi
http://www.coe.fi
http://www.rktl.fi

More articles from Agricultural and Forestry Science:

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

nachricht New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Water - as the underlying driver of the Earth’s carbon cycle

17.01.2017 | Earth Sciences

Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

17.01.2017 | Materials Sciences

Smart homes will “LISTEN” to your voice

17.01.2017 | Architecture and Construction

VideoLinks
B2B-VideoLinks
More VideoLinks >>>