HOME >> BIOLOGY >> NEWS
How fish conquered the ocean

Scientists at the University of Bergen, Norway have deduced how bony fishes conquered the oceans by duplicating their yolk-producing genes and filling their eggs with the water of life the degradation of yolk proteins from one of the duplicated genes causes the eggs to fill with vital water and float. This is the major solution realized by extant marine teleosts that showed an unprecedented radiation during the late Cretaceous and early Paleogene Periods. The work is a unique hypothesis that integrates the cellular and molecular physiology of teleost reproduction with their evolutionary and environmental history.

"The oceans have not always been filled with fishes as nowadays" says researcher Dr. Roderick Nigel Finn at the Department of Biology, University of Bergen, Norway. "To the contrary", Dr Finn says, "the fossil record shows that the ancestors of the bony fishes (teleosts) inhabited fresh water environments for at least 150 million years before they entered the oceans".

"Apparently, it was not until the Eocene epoch (about 55 million years ago) that an unparalleled and rapid burst of thousands of new marine teleost species took place as evidenced by their sudden appearance in the fossil records of marine sediments. The basis for this successful radiation is unexplained and has intrigued biologists for many years", says Dr. Finn and adds, "Our paper in PLoS ONE relates to the molecular solutions evolved among the teleost ancestors and provides a compelling hypothesis of when, how and why the teleosts succeeded in the oceanic environment. It is common knowledge that water is essential for life," continues Dr. Finn, "so it seems a surprising paradox that fishes that live in water should have a problem acquiring it. Yet it was this paradox that provided the trail of clues for us to follow".

"The physiological problems of reverting from a fresh water environment to the saline seawater is demanding for the water balance of fishes", says
'"/>

Contact: Roderick Nigel Finn
nigel.finn@bio.uib.no
47-055-583-595
Public Library of Science
23-Jan-2007


Page: 1 2 3

Related biology news :

1. How ancient whales lost their legs, got sleek and conquered the oceans
2. 1 of deep oceans most turbulent areas has big impact on climate
3. Proteaceae spread by continental drift and transoceanic dispersal
4. Antarctic icebergs -- Hotspots of ocean life
5. Salty oceans provide early warning for climate change
6. A living memory chip, black holes on the loose, and a clearer picture of ocean currents
7. Short-circuit found in ocean circulation
8. MITs ocean model captures diversity of underwater forests
9. Healthy coastal wetlands would adapt to rising oceans
10. Changing ocean conditions led to decline in Alaskas sea lion population
11. Global ocean sampling expedition

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/7/2020)... ... August 06, 2020 , ... ... in the prestigious National STEM Scholar Program, a unique professional development program that ... project support for middle school science teachers nationwide. , Created in partnership between ...
(Date:7/31/2020)... ... July 30, 2020 , ... ... therapeutics product portfolio with a near term focus on Type 2 diabetes and ... commercialization experience across multiple therapeutic areas and classes. As Chief Commercial Officer, Justin ...
(Date:7/10/2020)... ... 08, 2020 , ... Overcoming Comparability Issues in Regenerative Medicines ... Wednesday, July 22, 2020 • 1:30 p.m.-3:00 p.m. EDT, https://www.fdanews.com/cellandgenetherapy , ... way to complete one? Will the study comply with all FDA requirements? Understanding ...
Breaking Biology News(10 mins):
(Date:8/3/2020)... ... August 03, 2020 , ... ... Jim Corrigan, President and CEO has been named one of the 100 most ... industry sectors, PharmaVoice 100 honorees are selected based on how they have inspired ...
(Date:7/31/2020)... (PRWEB) , ... July 29, 2020 , ... ... that can combine up to three different materials for use with CRM, neurostimulation, ... up to three materials to meet specific design requirements, performance, and cost criteria; ...
(Date:7/22/2020)... ... ... Join experts from Reed Tech , Gary Saner, Sr. Manager, Information ... live webinar on Thursday, August 13, 2020 at 11am EDT (4pm BST/UK). ... Specifically, for medical devices, the NMPA has departments dealing with medical device registration (pre-market ...
(Date:7/10/2020)... (PRWEB) , ... July 08, 2020 , ... ... services and products, announces a significant expansion of laboratory operations through its ... for agencies implementing testing programs. , Bode-CARES provides a turnkey ...
Breaking Biology Technology:
Cached News: