Welcome to FIS   Sponsored By
United States
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us
   


UW-Madison professor Pupa Gilbert holding an abalone shell: mother-of-pearl. (Photo: Jeff Miller/UW-Madison)

Mother of pearl can tell ocean temperature, depth

Click on the flag for more information about United States UNITED STATES
Tuesday, May 15, 2012, 01:40 (GMT + 9)

Nacre or mother of pearl is produced by a host of mollusc species. Scientists from the University of Wisconsin-Madison have now shown that it can be used as a thermometer and pressure sensor which reveals both the temperature and ocean depth at which it formed.

"We found a strong correlation between the temperature at which nacre was deposited during the life of the mollusc and water temperature," explained Pupa Gilbert, a UW-Madison professor of physics and chemistry and the senior author of the new report published in the Journal of the American Chemical Society (JACS).

"All other (temperature) proxies are based on chemical analyses and the relative concentration of different elements or isotopes. This could be our first physical proxy, in which the microscopic structure of the material tells us the maximum temperature and maximum pressure at which the mollusc lived," Gilbert added.

If these techniques can be applied to fossil nacre, scientists can start to accurately rebuild a global record of ancient environments and environmental change.

"If the correlation holds, we would have a thermometer that goes back in time, a paleothermometer of how hot or cold water temperatures were when the nacre formed," said Gilbert.

Researchers can also use the thickness of the nacre layers -- which varies for the water depth at which the material was assembled by a mollusc -- to learn more about environmental conditions of the present and past.

"The maximum temperature can be measured by how disordered the nacre crystal orientations are, while the maximum pressure can be taken from the thickness of the nacre layers."

Along with UW-Madison graduate student Ian C Olson, Gilbert subjected nacre from eight mollusc species from different environments to a technique that can map the orientation of nacre crystals. The team observed uneven thicknesses, widths and angles of the crystalline "bricks" that, together with an organic mortar, are set by the mollusc to form mother of pearl.

"We wondered why the shells were so different and concluded that the key parameters to test were the environmental ones, including maximum, minimum and mean annual temperatures as well as maximum and minimum water pressure, which depends on water depth," said Gilbert.

The team found an extremely high correlation between the microscopic structural characteristics of their nacre samples and the temperature and pressure information obtained from the various harvesting sites.

By Natalia Real
editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
United States
Apr 30, 03:10 (GMT + 9):
Seafood supplier sentenced for salmon labelling fraud
Australia
Apr 30, 03:00 (GMT + 9):
Farmed Atlantic salmon’s poor hearing may affect survival
Singapore
Apr 30, 02:40 (GMT + 9):
China Fishery pre-selects potential buyers for Peruvian operations
Iceland
Apr 30, 02:30 (GMT + 9):
IN BRIEF - Panama Papers revelations to hit Iceland fisheries next
United Kingdom
Apr 30, 02:30 (GMT + 9):
IN BRIEF - Fish firm denies ‘dodgy wage tactics’ in union row
United States
Apr 30, 02:30 (GMT + 9):
IN BRIEF - Government Accountability Office Calls USDA Catfish Program a Waste for 10th Time
Peru
Apr 30, 02:30 (GMT + 9):
Anchovy fishing suspended in southern Peru area
Philippines
Apr 30, 02:00 (GMT + 9):
IN BRIEF - EFTA Signs FTA With The Philippines
Taiwan
Apr 30, 02:00 (GMT + 9):
Taiwan ups the ante in protest against seizure of fishing boat
Australia
Apr 30, 02:00 (GMT + 9):
IN BRIEF - Anger over approval for increase in Macquarie Harbour fish farm stocks
United States
Apr 30, 02:00 (GMT + 9):
IN BRIEF - Chemical runoff kills 5,600 fish in Colorado
New Zealand
Apr 30, 02:00 (GMT + 9):
IN BRIEF - EDS questions motivation of fisheries companies
United States
Apr 30, 02:00 (GMT + 9):
IN BRIEF - Maine’s lobster season off to an early start
Russian Federation
Apr 30, 02:00 (GMT + 9):
IN BRIEF - Russian Aquaculture FY 2015 net loss widens to RUB 1.34 billion
United States
Apr 30, 02:00 (GMT + 9):
IN BRIEF - Tesco – leading on sustainable seafood



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Indonesia detains Chinese fishing boat fleeing from Argentina
Argentina After almost two months of efforts coordinated by Interpol and the cooperation of seven countries on four continents, the Indonesian Armed Forces arrested one of the most wanted pirate ships in the world.
Global unions urge EU to defend fishing workers' labour rights
European Union Several global unions will request the EU to take action to ensure respect for labour rights by companies whose products are imported into the European market.
Better sockeye salmon season forecast in Alaska
United States The Alaska Department of Fish and Game forecast a total run of Copper River natural and enhanced sockeye salmon of 2.56 million and a total run estimate of 64,000 chinook salmon for the 2016 mid-May season.
Marine Harvest and research institutions aim to boost aquaculture
United Kingdom Marine Harvest Scotland is teaming up with one of the country’s leading marine science research institutions to help Scottish aquaculture thrive in a competitive global industry.
 
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Nueva Pescanova, S.L. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods Inc. -Headquarter-
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
Food Project (Siam) Co., Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO -Food and Agriculture Organization- Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
Marine Harvest ASA - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. -Headquarter-
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  -Holding Headquarter-
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
Ocean Trawlers Group - Ocean Trawlers HK Ltd.
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
Morpol ASA - Group Headquarters
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2016 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER