Navigation Links
UBC researcher gives first-ever estimate of worldwide fish biomass and impact on climate change
Date:1/15/2009

Are there really plenty of fish in the sea? University of British Columbia fisheries researcher Villy Christensen gives the first-ever estimate of total fish biomass in our oceans: Two billion tonnes.

And fish play a previously unrecognized but significant role in mitigating climate change by maintaining the delicate pH balance of the oceans, according to a study published in tomorrow's edition of the journal Science, co-authored by Christensen and a team of international scientists.

"By drinking salt water, fish ingest a lot of calcium, which needs to be removed or they will get renal stones," says Christensen, an associate professor in the UBC Fisheries Centre.

The team discovered that fish do this by binding the calcium to bicarbonate, and then excreting it as pellets of calcium carbonate, a chalk-like substance also known as "gut rocks," in a process completely separate from food digestion. For an animation of this process, visit www.publicaffairs.ubc.ca/download.

As the calcium carbonate from these pellets dissolves, it turns the seawater more alkaline, which has relevance for ocean acidification, and is impacted by the ocean's exchange of carbon dioxide (CO2) with the atmosphere.

To gauge the global impact of this process, Christensen and Simon Jennings from the UK's Centre for Environment, Fisheries and Aquaculture Science took two entirely different approaches to estimate the total biomass of fish in the world's ocean.

Jennings examined global ocean plant production and its efficiency as it moves through the food chain, while Christensen tallied global fish catches since 1950 and calculated how much fish there must have been in the oceans to support fisheries. The two approaches resulted in a close range of numbers: 0.8 to 2 billion tonnes.

"This study really is the first glimpse of the huge impact fish have on our carbon cycle and why we need them in the ocean," says Christensen. "We must buck the current trend of clear-cutting of the oceans and foster these unrecognized allies against climate change."


'/>"/>

Contact: Brian Lin
brian.lin@ubc.ca
604-822-2234
University of British Columbia
Source:Eurekalert

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
6. U of MN researchers discover noninvasive diagnostic tool for brain diseases
7. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
8. Researchers discover new strategies for antibiotic resistance
9. Researchers find new taste in fruit flies: carbonated water
10. Binghamton University researchers investigate evolving malaria resistance
11. Antioxidant to retard wrinkles discovered by Hebrew University researcher
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/28/2017)... 28, 2017 The report "Video ... Monitors, Servers, Storage Devices), Software (Video Analytics, VMS), and ... Global Forecast to 2022", published by MarketsandMarkets, the market ... is projected to reach USD 75.64 Billion by 2022, ... The base year considered for the study is 2016 ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
(Date:3/22/2017)... , March 21, 2017   Neurotechnology ... object recognition technologies, today announced the release of ... (SDK), which provides improved facial recognition using up ... on a single computer. The new version uses ... improve accuracy, and it utilizes a Graphing Processing ...
Breaking Biology News(10 mins):
(Date:4/26/2017)... ... April 26, 2017 , ... ... premiere team-building and cooking events company, offers one-of-a-kind gifts, ranging from gourmet cooking ... in California cuisine, and guests leave inspired with new cooking tips and techniques, ...
(Date:4/26/2017)... ... 2017 , ... Baltimore bio tech firm, PathSensors, Inc., announced ... at the National Postal Forum 2017 in Baltimore, Maryland, May 21st through May ... to use and low cost threat detection solution for government and commercial mail ...
(Date:4/25/2017)... ... ... As part of the Stago EdVantage Virtual University Virtual Event, ... order to illuminate this clinical problem for people unfamiliar with the topic. , DIC ... high degree of morbidity and mortality. DIC is a confusing disorder from both diagnostic ...
(Date:4/25/2017)... ... April 25, 2017 , ... ... & Rehabilitation, P.A. , proudly announced today that acclaimed physiatrist Matthew Terzella, MD, ... on May 15, 2017. , Dr. Terzella completed his residency in Physical Medicine ...
Breaking Biology Technology: