“This new discovery has significant scientific implications and application for lamprey conservation,” says principal investigator and lead author David Close, an assistant professor in the UBC Department of Zoology and director of the Aboriginal Fisheries Research Unit at UBC’s Fisheries Centre.
Close and colleagues at Michigan State University identified a corticosteroid hormone – called 11-deoxycortisol – in the sea lamprey that plays dual roles in balancing ions and regulating stresses, similar to aldosterone and cortisol in humans. The findings are published online this week in the Proceedings of National Academy of Sciences Early Edition.
Native to the Pacific Coast of North America and Asia, Pacific lampreys are an important ceremonial and subsistence food for Aboriginal peoples in the Columbia River basin. They are born in freshwater, swim out to the ocean as adults and return to freshwater to reproduce in similar habitats to Pacific salmon and trout. Adult lampreys can grow to approximately 75 cm long and use their sucker-like mouth to attach to other fish while in the ocean.
NB: Images of the Pacific lamprey and Prof. Close are available at http://www.publicaffairs.ubc.ca/2010/07/22/mr-10-105/.
“The origin of the corticosteroid signaling pathway has remained controversial over the past several decades because the identity of the ancestral corticosteroid has been elusive,” says Close.
“This discovery will help us better assess environmental and other stress factors on lamprey species – and provide insight into how stress-regulating hormones evolved from the earliest of vertebrates,” says Close, a member of the Cayuse Nation on the Confederated Tribes of the Umatilla Indian Reservation in the Pacific Northwest.
The study was initiated as part of efforts to restore populations of Pacific lamprey in the Columbia River Basin. Pacific lamprey numbers in the Columbia River have greatly declined since the construction of dams along the river.
Part of the study was conducted while Close was a researcher at the Department of Fisheries and Wildlife at Michigan State University. Major funding for this work was awarded to Close, while a fisheries scientist at the Confederated Tribes of the Umatilla Indian Reservation, from Bonneville Power Administration and additional support came from Michigan State University’s college of Agriculture and Natural resources, Great lakes fishery commission, and a fellowship from the National Institute of Mental Health.
Brian Lin | EurekAlert!
What the world's tiniest 'monster truck' reveals
23.08.2017 | American Chemical Society
Treating arthritis with algae
23.08.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
23.08.2017 | Life Sciences
23.08.2017 | Life Sciences
23.08.2017 | Physics and Astronomy