Are all tunas alike? It is true that they are all swift, powerful swimmers that benefit from high metabolic rates - and that in order to support these rates, they have evolved into a state of high heart rates. Consider the skipjack tuna, which has been clocked at a heart rate of over 200 beats-per-minute. But is the cardiac stamina of the cold water (endothermic) tuna, such as the bluefin, albacore and yellowfin, the same as that of its warm water (ecothermic) sister the mackerel? Why should it matter?
A research team from Stanford Universitys Tuna Research and Conservation Center has investigated the intrinsic differences among these tunas. Their findings suggest that a key step in the evolution of the tunas high heart and metabolic rates is the result of an increase a key protein –SERCA2. Their findings also suggest that high levels of the enzyme in the bluefish tunas heart may be important for its ability to retain its cardiac function at cold temperatures. While a better understanding of the tuna may seem of little consequence, what researchers learn about the adaptation of these magnificent fish helps us look beyond ourselves and to appreciate the lives of those living below sea level.
A New Study
This study reveals that distinct cellular differences in the expression of a key protein –SERCA2 – are associated with the beat-to-beat contraction of tuna and mackerel hearts. It suggests that there are fundamental differences in the way these fish initiate myocyte contraction, and provides further evidence for the role of the SR Ca2+-ATPase in cardiac function of tunas.
The American Physiological Society (APS) was founded in 1887 to foster basic and applied science, much of it relating to human health. The Bethesda, MD-based Society has more than 10,000 members and publishes 3,800 articles in its 14 peer-reviewed journals every year.
Donna Krupa | EurekAlert!
Link Discovered between Immune System, Brain Structure and Memory
26.04.2017 | Universität Basel
Researchers develop eco-friendly, 4-in-1 catalyst
25.04.2017 | Brown University
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
26.04.2017 | Materials Sciences
26.04.2017 | Agricultural and Forestry Science
26.04.2017 | Physics and Astronomy