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12 February 2018

Simple rules can help fishery managers cope with ecological complexity [Phys]

To successfully manage fisheries, factors in the environment that affect fish—like food sources, predators and habitat—should be considered as part of a holistic management plan.That approach is gaining traction in fisheries management, but there has been no broad-scale evaluation of whether considering these ecosystem factors makes any economic sense for the commercial fishing industry. In these often profitable and competitive markets, that question has lacked the evidence to rule one way or another.
A team of ecologists and economists has addressed that question in the first study to test whether real-life ecological interactions produce economic benefits for the fishing industry. The results were published online last week in the Proceedings of the National Academy of Sciences.

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9 February 2018

When it comes to genes, lichens embrace sharing economy [Phys]

University of Colorado Boulder researchers have discovered the first known molecular evidence of obligate symbiosis in lichens, a distinctive co-evolutionary relationship that could shed new light on how and why some multicellular organisms consolidate their genomes in order to co-exist.

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8 February 2018

Giant viruses may play an intriguing role in evolution of life on Earth [Phys]

We all know viruses cause colds and flu this time of year, but you might be surprised to learn that a virus may have played a key role in the evolution of nearly all life forms on Earth.
In a new study, a University of Iowa biologist identified a virus family whose set of genes is similar to that of eukaryotes, an organism classification that includes all plants and animals.

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8 February 2018

De Facebook au développement des plantes : quand les réseaux s’en mêlent [The Conversation]

Réseau téléphonique, réseau social, réseau routier, réseau professionnel… Le terme « réseau » est aujourd’hui passé dans le langage courant. Un réseau informatique constitué d’ordinateurs reliés entre eux, ou bien un réseau de métro dont les stations sont connectées par des lignes en sont deux représentations intuitives. La théorie des graphes, transposée dans le monde réel au travers de la théorie des réseaux, nous enseigne que ces derniers possèdent des propriétés mathématiques intrinsèques. Elles rendent leur étude formelle possible, et ainsi de mieux comprendre, voire anticiper le fonctionnement des systèmes que les réseaux décrivent.

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7 February 2018

Geneticists Unravel Secrets of Super-Invasive Crayfish [Scientific American]

DNA analysis suggests the self-cloning species is a genetic hybrid that emerged in an aquarium in the 1990s.

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