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
United States
Jul 23, 04:00 (GMT + 9):
IN BRIEF - Biotech Startup Brings Red Algae-Based Shrimp from Lab to Plate
Canada
Jul 23, 04:00 (GMT + 9):
IN BRIEF - Offshore northern shrimp fishermen won't be compensated for quota cut
Viet Nam
Jul 23, 04:00 (GMT + 9):
IN BRIEF - Officials dismissed for certifying substandard aquaculture products
Viet Nam
Jul 23, 03:10 (GMT + 9):
Officials accused of certifying substandard aquaculture products
China
Jul 23, 03:00 (GMT + 9):
IN BRIEF - Chinese research vessel prepares for exploration in sea waters near Papua New Guinea
Faroe Islands
Jul 23, 03:00 (GMT + 9):
IN BRIEF - BAKKAFROST: Acquisition of P/F Faroe Farming approved by the authorities
New Zealand
Jul 23, 03:00 (GMT + 9):
IN BRIEF - Pregnant women told 'don't take fish oil' after 'dramatic' finding
Chile
Jul 23, 02:30 (GMT + 9):
Reconstruction plan after earthquake and tsunami reaches 95pc
New Zealand
Jul 23, 02:10 (GMT + 9):
Does oxidized fish oil pose health risks?
Faroe Islands
Jul 23, 00:20 (GMT + 9):
Bakkafrost’s centre ISA virus variant would be nonpathogenic
Chile
Jul 22, 23:30 (GMT + 9):
A deputy’s alleged lobby to help companies that financed him revealed
United Kingdom
Jul 22, 23:30 (GMT + 9):
Expert forecasts dark future for North Sea cod and haddock fishing
Germany
Jul 22, 23:00 (GMT + 9):
Cost-efficient microalgae farming method developed
Chile
Jul 22, 22:00 (GMT + 9):
SalmonChile reactivates initiative to help in retraining process
Norway
Jul 22, 21:30 (GMT + 9):
Salmon price status at week 28



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Qatar Airways launches new freighter services
Qatar Qatar Airways Cargo has launched new freighter services to New York and Halifax, which will handle lobster and other seafood from these two cities to Europe, the Middle East, South and North East Asia via Doha.
Oily fish may lower risk of death in bowel cancer patients
United States New US-based research suggests that daily intake or one or two weekly portions of oily fish by bowel cancer patients might significantly boost their chance of survival.
Hapag-Lloyd and UASC's merger redefines global shipping industry
Germany German firm Hapag-Lloyd AG and the Arabian one United Arab Shipping Company SAG have signed a business combination agreement to merge both companies, subject to the necessary regulatory and contractual approvals.
Govt and fisheries sector agree on hake management plan
Chile Representatives of artisanal fisheries, industrial sector, processing plants, SERNAPESCA and the Undersecretariat of Fisheries and Aquaculture have agreed on a hake fishery management plan.
 
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