HOME >> BIOLOGY >> NEWS
NSF-Funded Researcher Plucks Four Unknown Fish Species From Antarctic Waters


An Ohio University researcher who netted four species of fish previously unknown to science during a National Science Foundation (NSF) Antarctic research cruise says the discoveries confirm his hypothesis that the continent's frigid seas are a world-class evolutionary laboratory.

"Antarctica is under-appreciated as an evolutionary site," argues Joseph Eastman, an anatomist who made his discoveries aboard the Nathaniel B. Palmer, an icebreaker of the NSF's polar research fleet. "The oceanic waters surrounding the continent are a natural evolutionary laboratory comparable to the Hawaiian Islands or Lake Baikal in Russia."

Eastman said his research indicates the waters appear to have been the site of geologically recent "adaptive radiation" as a single stock of fish -- known as notothenioids -- evolved to fill ecological niches that unrelated species would otherwise occupy. This is the only known example of an adaptive radiation in marine fish, according to Eastman.

Fossil evidence indicates that a variety of different species occupied ecological niches earlier in geological time, when Antarctic waters probably were considerably warmer. But Eastman said that many scientists erroneously assume that because the relatively shallow coastal waters around the southern continent are now so cold, they also must be relatively barren and uninteresting in an evolutionary sense.

The variety of species in the waters of the Antarctic shelf, which typically are no more than 500 meters deep, differs sharply from similar, more temperate waters, such as in the Delaware Bay. In those waters, Eastman noted, there is a great diversity of species on the bottom and at different levels of the water column.

In Antarctica, 95 species of notothenioids, all derived from bottom-dwellers without swim bladders, dominate all habitats. Over evolutionary time, some notothenioids have experienced an increase in body fat and are able t
'"/>

Contact: Peter West
pwest@nsf.gov
703-306-1070
National Science Foundation
4-Mar-1999


Page: 1 2

Related biology news :

1. Researchers determine genetic cause of Timothy syndrome
2. Researchers find color sensitive atomic switch in bacteria
3. Researchers identify protein promoting vascular tumor growth
4. Researchers devise potent new tools to curb ivory poaching
5. Researchers create nanotubes that change colors, form nanocarpet and kill bacteria
6. Researchers ID chlorophyll-regulating gene
7. Researchers develop fast track way to discover how cells are regulated
8. Researchers identify distinctive signature for metastatic prostate cancer
9. Researchers report new gene test for isolated cleft lip and palate
10. Researchers discover why mutant gene causes colon cancer
11. Researchers identify the genomes controlling elements

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


(Date:7/20/2017)... July 20, 2017 Delta (NYSE: DAL ) customers ... Delta aircraft at Reagan Washington National Airport (DCA). ... Delta launches biometrics to board aircraft ... Delta,s biometric boarding pass ... is now integrated into the boarding process to allow eligible Delta ...
(Date:5/16/2017)... TEANECK, N.J. , May 16, 2017  Veratad ... leading provider of online age and identity verification solutions, ... the K(NO)W Identity Conference 2017, May 15 thru May ... Ronald Regan Building and International Trade Center. ... across the globe and in today,s quickly evolving digital ...
(Date:4/18/2017)... SUNNYVALE, Calif. , April 18, 2017  Socionext Inc., a ... prototype of a media edge server, the M820, which features the ... face recognition software provided by Tera Probe, Inc., will be showcased ... and at the NAB show at the Las Vegas ... ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... , ... October 11, 2017 , ... ... the implantation and pregnancy rates in frozen and fresh in vitro fertilization ... progesterone and maternal age to IVF success. , After comparing the results from ...
(Date:10/10/2017)... , ... October 10, 2017 , ... ... Center’s FirstHand program has won a US2020 STEM Mentoring Award. Representatives of the ... for Excellence in Volunteer Experience from US2020. , US2020’s mission is to change ...
(Date:10/10/2017)... CALIFORNIA (PRWEB) , ... October 10, 2017 , ... ... technological innovation and business process optimization firm for the life sciences and healthcare ... BoxWorks conference in San Francisco. , The presentation, “Automating GxP Validation for ...
(Date:10/9/2017)... ... ... At its national board meeting in North Carolina, ARCS® Foundation ... Physics and Astronomy, has been selected for membership in ARCS Alumni Hall of ... Breakthrough Prize in Fundamental physics for the discovery of the accelerating expansion of the ...
Breaking Biology Technology:
Cached News: