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


Antarctic krill, Euphausia superba. (Photo: Somas.stonybrook.edu)

Krill would feel impact of Antarctic seas warming

S. GEORGIA & S. SANDWICH
Tuesday, August 27, 2013, 23:10 (GMT + 9)

Antarctic krill are usually less than 6 cm in length but their size belies the major role they play in sustaining much of the life in the Southern Ocean, since they are the primary food source for many species of whales, seals, penguins and fish.

Krill are known to be sensitive to sea temperature, especially in the areas where they grow as adults. This has prompted scientists to try to understand how they might respond to the effects of further climate change.

Using statistical models, a team of researchers from the British Antarctic Survey and Plymouth Marine Laboratory assessed the likely impact of projected temperature increases on the Weddell Sea, Scotia Sea and Southern Drake Passage, which is known for its abundance of krill. This region has experienced sea surface warming of as much as 1 °C over fifty years. Projections suggest this could rise by another 1 °C by the end of the 21st century.

The models are based on equations which link krill growth, sea surface temperature, and food availability. An analysis of the results, published this week in the online journal PLOS ONE, suggests warming, if continued, could reduce the area of growth habitat by up to 20 per cent.

In the early life stages krill require deep water with low acidity and a narrow range of temperatures for their eggs to successfully hatch and develop. The larvae then feed on algae on the underside of sea ice.

The adults require suitable temperatures and enough of the right type of food (larger phytoplankton) to successfully grow and reproduce. Many of these critical environmental features (temperature, acidity, sea ice and food availability) could be affected by climate change.

The projected effects of warming are not evenly spread. The island of South Georgia is located within the area likely to be worst affected. Here the reduction in krill habitat could be as much as 55 per cent. The island is home to a range of animals such as fur seals and macaroni penguins that depend upon krill, and others, such as black-browed albatrosses, which eat substantial amounts of krill as well as fish and squid. The researchers say animals which don’t travel far to forage, such as fur seals, would be most affected by the projected changes.

Krill is also being commercially fished, although there is nothing to suggest current levels are unsustainable. In fact, at less than 1 per cent of estimated biomass, catches are much lower than most other commercial fisheries.

But the Antarctic krill fishery took 68 per cent of its total catch between 1980 and 2011 from the area of projected habitat degradation. The scientists suggest improved management systems to ensure the fisheries take into account both growing demand for catches and climate change.

Lead author, Dr. Simeon Hill, a marine biologist at BAS, said: “Each year, growth of Antarctic krill in the Southern Ocean produces new material that weighs twice as much as all the sugar produced in the world. Krill grow fastest in cold water and any warming can slow down or stop growth, reducing the food available for wildlife. Our research suggests that expected warming this century could severely reduce the area in which krill can successfully grow.”

Although there is evidence that warming seas pose a threat to Antarctic krill habitats the team of researchers believe this can be significantly reduced by putting effective management systems in place.


editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Japan
Feb 10, 03:00 (GMT + 9):
IN BRIEF - 2 seafood giants post higher April-December profits
European Union
Feb 10, 03:00 (GMT + 9):
IN BRIEF - Putting an end to overfishing in the Mediterranean
Maldives
Feb 10, 02:30 (GMT + 9):
Harvest strategy can maximise benefits from skipjack tuna
Viet Nam
Feb 10, 02:10 (GMT + 9):
Seafood producers and exporters hope to benefit from TPP
United Kingdom
Feb 10, 02:00 (GMT + 9):
IN BRIEF - Handover highlights progress in GBP 16.5 million Lerwick Harbour project
Peru
Feb 10, 01:40 (GMT + 9):
TPP opens new opportunities for the Peruvian seafood industry
New Zealand
Feb 10, 00:40 (GMT + 9):
Sealord stops producing kirimi in Nelson
Maldives
Feb 10, 00:20 (GMT + 9):
IN BRIEF - High hopes for the introduction of harvest control rules for skipjack
United Kingdom
Feb 10, 00:00 (GMT + 9):
IN BRIEF - Waitrose Commits to Revamped RFS
United Kingdom
Feb 10, 00:00 (GMT + 9):
IN BRIEF - IFFO welcomes BioMar and Whole Foods salmon feed project
United Kingdom
Feb 9, 23:50 (GMT + 9):
Cooke Aquaculture Scotland invests in modern pens
European Union
Feb 9, 23:00 (GMT + 9):
Oceana calls for emergency closures in the Mediterranean to stop overfishing
United Kingdom
Feb 9, 22:30 (GMT + 9):
Gas pipelines put at risk Shetland fishermen
Chile
Feb 9, 21:40 (GMT + 9):
Multiexport centres affected by HAB back to normal
United Kingdom
Feb 9, 18:00 (GMT + 9):
IN BRIEF - Cooke Aquaculture Scotland invests in future with latest Fusion Marine order



Lenguaje
FEATURED EVENTS
  
TOP STORIES
NOAA proposes new traceability plan to combat IUU fishing
United States NOAA announced a proposal to implement a traceability plan for fishery products, aimed at combating illegal, unreported and unregulated fishing and to prevent fraudulent trade.
Online platform opens up new opportunities for New Zealand's seafood in China
New Zealand New Zealand seafood retailers may now reach new consumers based in China’s rural villages through Alibaba Group’s B2C e-commerce platform, Tmall.com.
Fisheries specialists recommend a greater role for women in aquaculture
India Fisheries scientists recommended a greater role for women self-help groups to boost aquaculture production in the country.
Spain presents its plan to allocate fishing capacity for bluefin tuna
Spain The Ministry of Agriculture, Food and Environment has submitted to the European Commission the Capacity Plan of Spain for fishing Atlantic bluefin tuna in 2016, in which the fishing opportunities of the national fleet will increase more than 19 per cent.
 
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