Navigation Links
Where have all the codfish gone?
Date:2/26/2014

The mega-decline in cod and other fisheries across the North Atlantic Ocean threatens the livelihood of fishermen and communities in New England and Atlantic Canada. One suspect in the disappearance of cod and other groundfish is the food source for their young: a planktonic copepod crustacean, no larger than a grain of rice. Recent changes in local copepod populations have co-occurred with declines in fisheries elsewhere, such as the collapse of the cod fishery in Europe's North Sea.

For this and other reasons, Petra Lenz and Andrew Christie are among the scientists at the University of Hawai'i at Manoa working to understand how copepods are responding to global climate change, including to increases in water temperature, altered ocean currents, and ocean acidification.

Because of the copepod's small size and its vast ocean habitat, it is a poor subject for conventional physiological studies. New molecular techniques have opened doors for an alternative approach. Known as transcriptomics, this technique makes a catalog of all the messages ("transcripts") produced by the cells that control the animal's physiology. With this tool, biologists are now able to listen in on the instructions being sent out to direct an organism's response to its changing environment. With respect to copepods, the challenge is to identify and understand each message, in order to track down the causes of population changes.

The first transcriptome for the key North Atlantic copepod Calanus finmarchicus has now been published and made available for scientists everywhere. Appearing in a February 2014 issue of the journal PLOS ONE, it is the work of a team of scientists from the Pacific Biosciences Research Center at UH Manoa, Ohio University and Indiana University's National Center for Genome Analysis Support. Mount Desert Island Biological Laboratory in Salisbury Cove, Maine provided access to the biological samples. The transcriptome was sequenced by the University of Georgia Genomics Facility in Athens, Georgia.

This publication provides the first publicly accessible, large-scale molecular resource for investigating the physiological ecology of Calanus.

Highlights of this study include:

  • The observation that a large percentage of genes are not in play at any particular time while a young copepod matures;
  • The discovery of specific messages being sent out as individuals prepare to enter a critical dormant phase in their annual population cycle; and
  • The discovery of a number of previously unknown genes, suggesting a more complex biology than that of related animals like the fruit fly and water flea, which are used extensively for biomedical and ecotoxicologial research.

With the Calanus transcriptome in hand, scientist now have a tool to better understand how copepods adapt, and may be better able to predict when and where population changes will occur for this planktonic crustacean on which many fisheries depend.


'/>"/>

Contact: Andrew E. Christie
crabman@pbrc.hawaii.edu
808-956-5212
University of Hawaii at Manoa
Source:Eurekalert  

Related biology news :

1. Water, water everywhere - but is it essential to life?
2. UCSD researchers: Where international climate policy has failed, grassroots efforts can succeed
3. Civil engineers find savings where the rubber meets the road
4. Nowhere to hide: New device sees bacteria behind the eardrum
5. Report addresses challenges in implementing new diagnostic tests where they are needed most
6. Nature or nurture? It may depend on where you live
7. Where we split from sharks: Common ancestor comes into focus
8. Where to put nuclear waste?
9. Success of engineered tissue depends on where its grown
10. Coral scientists use new model to find where corals are most likely to survive climate change
11. Risk of cardiac arrest depends on where you live
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Where have all the codfish gone?
(Date:2/2/2016)... This BCC Research report provides a ... the recent advances in high throughput ‘omic platforms ... forward. Includes forecast through 2019. Use ... opportunities that exist in the bioinformatic market. Analyze ... well as IT and bioinformatics service providers. Analyze ...
(Date:2/2/2016)... Technology Enhancements Accelerate Growth of X-ray Imaging ... and computed radiography markets in Thailand ... Indonesia (TIM). It provides an in-depth analysis ... as regional market drivers and restraints. The study offers ... market attractiveness, both for digital and computed radiography. Market ...
(Date:2/2/2016)... Calif. , Feb. 2, 2016  Based ... market, Frost & Sullivan recognizes US-based Intelligent Retinal ... Frost & Sullivan Award for New Product Innovation. ... in North America , is ... the rapidly growing diabetic retinopathy market. The IRIS ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... Germany and GERMANTOWN, ... QGEN ; Frankfurt Prime Standard: QIA) today announced ... RNA Panels for gene expression profiling, expanding QIAGEN,s portfolio ... The panels enable researchers to select from over 20,000 ... and discover interactions between genes, cellular phenotypes and disease ...
(Date:2/11/2016)... York, NY (PRWEB) , ... ... ... (BPI), a business-to-business publication dedicated to delivering cutting-edge information focused on the ... Healthcare Life Sciences to become a premier sponsor of the 2016 BioProcess ...
(Date:2/11/2016)... ... February 11, 2016 , ... Reichert Technologies, which ... today to pursue the highest level of accuracy and quality with the addition ... and the AR5 Refractometer. Accurate, reliable and tough enough for the most ...
(Date:2/10/2016)... Early-career researchers from ... , Uganda and Yemen ... nutrition   Indonesia , Nepal ... Yemen are being honored for their accomplishments in ... celebrated for mentoring young women scientists who are pursuing careers in agriculture, ...
Breaking Biology Technology: