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

Juvenile paua, aged about 6 months. (Photo: Alan Blacklock, NIWA)

Warming ocean to affect fisheries by end of century

Click on the flag for more information about New Zealand NEW ZEALAND
Thursday, December 07, 2017, 00:10 (GMT + 9)

A recent study carried out by National Institute of Water & Atmospheric Research (NIWA) scientists suggests that the rapid warming of the ocean near Tasmania may provide a good indication of how the water around New Zealand will change as the planet warms, affecting the foodweb and fisheries

The scientists have used two Earth System Models and four climate change scenarios to project how New Zealand waters will be affected by 2100.

Lead author and NIWA marine biogeochemist Professor Cliff Law says the best-case scenario involved a cessation in the production of carbon dioxide in the next few years, with the worst-case being business as usual in which carbon dioxide levels keep rising.

“The average warming around New Zealand is 2.5°C by the end of this century, which will affect how the ocean mixes and the nutrients available for plankton growth, with knock-on effects on the foodweb and fisheries,” points out Law.

The professor explains that the surface ocean has a “density step” between the surface water and the lower, deeper water where the nutrients come from, which acts like a physical barrier to nutrient movement between the layers.

“With further warming, there’s a stronger density step and less nutrient supply for the surface waters so phytoplankton doesn’t grow so well and productivity drops down,” he adds.

Projected changes in upper ocean properties in response to climate change (Image:NIWA)

The paper reports that one of the most affected areas for nutrient decline will be the Chatham Rise to the east of New Zealand, which currently provides about 60 per cent of the country’s commercial fish catch. Another vulnerable area is the sub Antarctic waters to the south of New Zealand which is also home to some commercial fisheries.

In Professor Law’s opinion, the fishing industry may need to think about being more agile in terms of the species it catches and where it catches them.

Acidity in the ocean will increase by 130 per cent by the end of the century which will cause changes to shellfish.

“For example, we can speculate that shells of paua and mussels may be affected – it doesn’t mean that we lose them from our ecosystems, just that they might become smaller in response to their diversion of energy to maintain their shells,” he explains.

Changes in species in New Zealand waters could include more invasive species and possibly new diseases that could affect local ecosystems. However, there may also be an upside. Tuna could be more plentiful in its waters because they prefer warmer waters and other fisheries may also benefit.

The professor also said the Earth Systems Models used by the scientists provided the best data “for now” but their global scale meant they provided information at low resolution.

“People tend to think of climate change from a terrestrial angle but obviously, as the ocean is a big part of the globe, there will be significant changes. As it’s also a significant part of New Zealand’s Exclusive Economic Zone we need to start planning for this now,” Professor Law concludes.

The paper findings were published in the New Zealand Journal of Marine and Freshwater Research.


[email protected]


Click to know how to advertise in FIS
United States
Mar 18, 03:00 (GMT + 9):
Dr. Praeger's Hooks Clean Eaters with Tasty New MSC Certified Wild Caught Alaskan Seafood Bites and Burgers
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Recycling system converts fish nutrients into a fertiliser vegetables love
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Mombasa court fines Chinese KSh50,000 for selling fish in Kenya without permit
Russian Federation
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Russia and the Republic of Korea plan joint aquaculture investments
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Stofnfiskur win approval to continue export of Atlantic salmon ova to Chile
United Kingdom
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Brexit threatens UK seafood exports
United Kingdom
Mar 17, 05:00 (GMT + 9):
IN BRIEF - Stop eating cod and tuna in favour of more sustainable fish, Britons told
Mar 17, 05:00 (GMT + 9):
Important German seafood importer-distributor files for insolvency
Mar 16, 22:20 (GMT + 9):
Pingtan Marine Enterprise reports financial results for Q4 and year
Viet Nam
Mar 16, 22:10 (GMT + 9):
US to inspect Việtnam catfish controls
Mar 16, 22:00 (GMT + 9):
Alantra invests nearly EUR 80 million in Unión Martín
Mar 16, 21:30 (GMT + 9):
Two boats suspended for catching golden kingklip illegally and two more to be added
Mar 16, 21:00 (GMT + 9):
Canada’s fish and seafood exports climbed to $6.9B in 2017
Mar 16, 20:00 (GMT + 9):
VARD announce a contract for the construction of one fishing vessel for Remøybuen AS
United States
Mar 16, 11:00 (GMT + 9):
FDA seek view on European Union’s Shellfish Safety Program to resume trade

Thai restaurants to stop purchasing Fukushima seafood over contamination concerns
Japan That seafood captured off the coast of Japan’s Fukushima Prefecture will no longer be sold at restaurants in Bangkok, Thailand, after consumer groups protested over possible nuclear contamination.
Local authorities closer to agreeing on fisheries cooperation with Argentina
Falkland Is. The United Kingdom, Argentina and the Falkland Islands are closer to agreeing on South Atlantic fisheries improved cooperation, for the conservation of shared resources as once existed with regular joint scientific cruises.
FDA seek view on European Union’s Shellfish Safety Program to resume trade
United States Food safety control system for raw bivalve molluscan shellfish intended for export into the United States, as administered by the European Commission, provides at least the same level of sanitary protection as the United States' system and is therefore equivalent.
Today’s pirate gold is the Patagonian toothfish
Worldwide Having previously concentrated on obstructing whale-hunting from Japan to the Faroe Islands, Sea Shepherd now focuses on other devastating acts of marine plunder.
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
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.
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. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
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
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2018 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER