HOME >> BIOLOGY >> NEWS
Thin tough skin, slow-growing gills protect larval Antarctic fish

Very thin but hardy, unblemished skin and slow developing gills appear to be keys to survival for newly hatched Antarctic notothenioids, a group of fish whose adults thrive in icy waters because of antifreeze proteins (AFPs) in their blood.

Such adaptations are important, researchers at the University of Illinois at Urbana-Champaign say, because the larval fish of at least two species of notothenioids that inhabit the Ross Sea at McMurdo Sound and Terra Nova Bay surprisingly lack sufficient antifreeze to protect them through their first three months of life.

The unexpected discovery, reported online by the Journal of Experimental Biology ahead of regular publication, counters the assumption that these vital proteins must be present from the time of hatching -- a view held by scientists since fish AFPs were found in the 1960s.

Internal fluids such as blood in many notothenioids are about half as salty as seawater. While seawater reaches its freezing point at -1.91 degrees Celsius, fish fluids will freeze at about -1 degree Celsius. The water where these species dwell rarely rises above the freezing point and is regularly filled with ice crystals.

"The way that we've understood how adult polar fishes survive has been based on their use of these antifreeze proteins to lower the freezing point of their internal fluids," said lead author Paul A. Cziko, a research specialist in the department of animal biology. "We finally got a chance to look at the larval fish, and it seems that they don't always have to have antifreeze proteins to survive."

Cziko, who earned bachelor's degrees in honors biology and biochemistry in 2004 from Illinois, studied in Antarctica as an undergraduate with animal biology professors Chi-Hing (Christina) Cheng and Arthur L. DeVries, who discovered AFPs in notothenioids.

The research team, which also included Clive W. Evans of the University of Auckland in New Zealand, studied three notothenioid spe
'"/>

Contact: Jim Barlow, Life Sciences Editor
jebarlow@uiuc.edu
217-333-5802
University of Illinois at Urbana-Champaign
13-Feb-2006


Page: 1 2 3

Related biology news :

1. When the going gets tough, slime molds start synthesizing
2. Tyrannosaur survivorship -- tough times for teens
3. USC researchers find drug is tough tumor fighter
4. Siberian tigers hang tough
5. Now, self-healing materials can mimic human skin, healing again and again
6. Oral ZYVOX shows cost savings for outpatient treatment of skin, other infections vs. vancomycin
7. Human gland probably evolved from gills
8. Multinational research: protecting ecology means understanding people, too
9. No evidence that widely prescribed statins protect against prostate cancer
10. Rain forest protection works in Peru
11. New study suggests Concord grape juice may provide protection against breast cancer

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Thin tough skin slow growing gills protect larval Antarctic fish

(Date:5/11/2015)... 11, 2015  Through a well-rounded UAS delegation representing private ... a strong showing at AUVSI,s Unmanned 2015 conference last week ... Ohio,s UAS industry met with over 200 ... points along the UAS ecosystem. "Our message ... President for Aerospace Rich Knoll . "If you want ...
(Date:5/10/2015)... , May 11, 2015 Fingerprint Cards ... FPC1025 and FPC1155 from the distributor World Peace Industrial Group ... distributors in Asia . Deliveries are planned ... be used by smartphone manufacturers in China ... the communicated revenue guidance of + 1 000 MSEK for 2015. ...
(Date:5/7/2015)... Sweden , May 7, 2015 ... touch fingerprint sensors, FPC1022 and FPC1035, FPC,s smallest ... and FPC1035 are mainly considered for integration on ... size gives smartphone OEMs increased possibilities to integrate ... The decreased size also improves possibilities for module ...
Breaking Biology News(10 mins):Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 235 Million 2FPC Introduces its Smallest Touch Fingerprint Sensors to Date 2
(Date:5/22/2015)... Charm Sciences, Inc. is pleased to ... Grain Inspection, Packers and Stockyards Administration (GIPSA) has ... to monitor aflatoxin in grains utilizing Charm’s ROSA ... Aflatoxin Quantitative Test (solvent-based). , The Charm ... Extraction Technology to extract aflatoxin from the sample ...
(Date:5/21/2015)... 2015 Specialty Pharmacy Times has ... admitted to BPA Worldwide as a business publication ... audience data for Specialty Pharmacy Times based on ... becoming a member of BPA Worldwide, Specialty Pharmacy ... clients with the most reliable, unequaled data,” said ...
(Date:5/21/2015)... Imagine being able to probe and truly ... Being able to read faces and enjoy genuine invisible ... their thoughts and actions like never before. Use ... unique abstract paintings and video, or, play a completely ... as it creates action, dialog, and outcomes based on ...
(Date:5/21/2015)... 2015 Research and Markets ( ... "2015 Global Survey on Flow Cytometry Adoption ... The primary goal of this research is to ... reagents. Key information the survey seeks to collect ... cytometers, predominantly used applications for flow cytometers, respondents, ...
Breaking Biology Technology:USDA-GIPSA (FGIS) Awards 5 Year Contract for Aflatoxin Tests to Charm Sciences 2Specialty Pharmacy Times Joins BPA Worldwide 25 Days to Meet ARGUS - The World's First Contactless Emotions Scanner 2Global Survey on Flow Cytometry Adoption Trends 2015 2
Cached News: