Navigation Links
Endangered gourmet sea snail could be doomed by increasing ocean acidity
Date:5/25/2011

Increasing levels of ocean acidity could spell doom for British Columbia's already beleaguered northern abalone, according to the first study to provide direct experimental evidence that changing sea water chemistry is negatively affecting an endangered species.

The northern abalone--prized as a gourmet delicacy--has a range that extents along the North American west coast from Baja California to Alaska. Even though British Columbia's northern abalone commercial fisheries where closed in 1990 to protect dwindling populations, the species has continued to struggle, largely due to poaching.

To better understand the impact climate change and specifically, increasing ocean acidity has on this endangered species, UBC researchers exposed northern abalone larvae to water containing increased levels of CO2. Increases from 400 to 1,800 parts per million killed 40 per cent of larvae, decreased the size of larvae that did survive, and increased the rate of shell abnormalities.

"This is quite bad news, not only in terms of the endangered populations of abalone in the wild, but also the impact it might have on the prospects for aquaculture and coastal economics," says Christopher Harley, Associate Professor with the Department of Zoology and one of the authors of the study.

"And because the species is already thought to be limited by reproductive output and recruitment, these effects are likely to scale up to the population level, creating greater limits on population growth."

Average CO2 levels in the open ocean hover at 380 parts per million, a number which is excepted to increase slowly over the next century.

What concerns the researchers are the much higher spikes in dissolved CO2 that are already being observed along the BC coast, particularly in late spring and early summer when northern abalone populations are spawning.

The findings were published in the latest issue of the Journal of Experimental Marine Biology and Ecology.

"While we're looking at a single species that is culturally important as a source of food and artistic inspiration for many coastal Pacific Northwest First Nations, this information may have implications for other abalone species in other parts of the world," says Ryan Crim, lead author on the paper who conducted the research while a graduate student with the UBC Department of Zoology.

Other species of abalone are farmed around the world, principally in China, Taiwan, Japan and Korea. The black, white and pink abalone are also endangered on the west coast--red abalone are still an economically viable food species.

The study was funded by the Natural Sciences and Engineering Research Council of Canada and conducted in collaboration with the Bamfield-Huu-ay-aht Community Abalone Project, a small abalone hatchery in Bamfield which has subsequently gone out of business. The dual mission of the hatchery was to produce cultured abalone for high end restaurants, and to restore endangered abalone by culturing and releasing larvae and juveniles to the wild.

Harley and Crim will continue to work with the aquaculture industry to study the effects of acidification on oysters and other shellfish.


'/>"/>

Contact: Christopher Harley
harley@zoology.ubc.ca
604-827-3431
University of British Columbia
Source:Eurekalert

Related biology news :

1. In a last stronghold for endangered chimpanzees, survey finds drastic decline
2. Study finds high mortality of endangered loggerhead sea turtles in Baja California
3. Scientists call for protected swimways for the endangered leatherback sea turtle
4. Endangered sawfish focus of national collection and recovery efforts
5. Dealing with taxonomic uncertainty for threatened and endangered species
6. Australias most endangered snake might need burning
7. Jeepers creepers: Climate change threatens endangered honeycreepers
8. T-STAR grant funds genetic studies on shrimp and papaya and endangered cycad rescue
9. Working to conserve endangered Playboy bunnies
10. Humans lend a hand to critically endangered waterbird
11. Biologists rediscover endangered frog population
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a product ... and Onegini today announced a partnership to integrate ... solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... to provide their customers enhanced security to access ...
(Date:4/15/2016)... April 15, 2016 Research ... Gait Biometrics Market 2016-2020,"  report to their offering.  ... ) , ,The global gait biometrics market is ... during the period 2016-2020. Gait analysis ... can be used to compute factors that are ...
(Date:3/31/2016)... , March 31, 2016  Genomics firm Nabsys ... founding CEO, Barrett Bready , M.D., who returned ... of the original technical leadership team, including Chief Technology ... of Product Development, Steve Nurnberg and Vice President of ... to the company. Dr. Bready served as ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks , ... industrial engineering, was today awarded as one of ... of the world,s most innovative companies. Ginkgo Bioworks ... for the real world in the nutrition, health ... work directly with customers including Fortune 500 companies ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle ... people with peritoneal or pleural mesothelioma. Their findings are the subject of a new ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma ...
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... 23, 2016  The Prostate Cancer Foundation (PCF) is pleased to ... faster cures for prostate cancer. Members of the Class of 2016 were selected ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
Breaking Biology Technology: