Navigation Links
Salmon farms kill wild fish, study shows

New research confirms that sea lice from fish farms kill wild salmon. Up to 95 per cent of the wild juvenile salmon that migrate past fish farms die as a result of sea lice infestation from the farms. The results of the research have been published in the Proceedings of the National Academy of Sciences of The United States of America.

"We know that fish farms raise sea lice levels, and we know that sea lice kill fish," said the study's lead author Martin Krkosek, a Ph.D. student at the University of Alberta Centre for Mathematical Biology. "This is the first study to combine field surveys, experiments and mathematical modeling in one system to estimate the total impact of the farms."

The primary sea lice hosts are adult salmon. Under natural conditions, the adults are far offshore when the juveniles are migrating out to sea. Fish farms put adult salmon in net pens along the migration routes. The result is a cloud of sea lice through which the juveniles must migrate. "It takes only one or two sea lice to kill a juvenile pink or chum salmon," said Krkosek. "The juveniles are so vulnerable because they are so small ?only one to two inches long."

"We often worry about wildlife making humans sick, but here is a case where humans are making wildlife sick," said study co-author Dr. Mark Lewis, a mathematician and biologist at the University of Alberta.

The study found an increasing number of salmon were killed over the migration season, from 9 per cent in early spring when the sea lice population was low to 95 per cent in late spring when the sea lice population was higher.

"Everyone knows that only a small fraction of juvenile salmon survive to return as adults," said Lewis. "The fish-farm sea lice are reducing that fraction even more."

The research was conducted by a team of biologists and mathematicians working in coastal British Columbia. "We counted sea lice on more than 14 thousand juvenile salmon migrating past fi
'"/>

Source:University of Alberta


Page: 1 2 3

Related biology news :

1. Salmonella caught red-handed
2. Salmonella bacteria use RNA to assess and adjust magnesium levels
3. Salmon go veggie to save wild fish stocks
4. Salmonella survives better in stomach due to altered DNA
5. Researchers reveal the infectious impact of salmon farms on wild salmon
6. New project aims to make large-scale lobster farms feasible
7. Organic farms produce same yields as conventional farms
8. WCS says avian flu prevention should focus on farms, markets
9. From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea
10. Agilent Technologies introduces advanced zebrafish, mouse microarrays for stem cell and developmental biology research
11. Sudden change in social status triggers genetic response in male fish, study finds
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Salmon farms kill wild fish study shows

(Date:9/21/2014)... In recent years, new strains of bacteria have emerged ... these superbugs, including drug-resistant forms of tuberculosis and staphylococcus, ... at least 23,000. Despite the urgent need for new ... antibiotics in the past decade. , MIT engineers have ... Using a gene-editing system that can disable any target ...
(Date:9/21/2014)... barnacles secrete very sticky proteins that help them cling ... these natural adhesives, a team of MIT engineers has ... ships or help heal wounds and surgical incisions. , ... engineered bacteria to produce a hybrid material that incorporates ... protein found in biofilms slimy layers formed by ...
(Date:9/19/2014)... Jimmy Durante of dinosaurs a newly discovered ... new dinosaur, named Rhinorex condrupus by ... Young University, lived in what is now Utah ... Cretaceous period. , Rhinorex, which translates roughly into ... relative of other Cretaceous hadrosaurs like Parasaurolophus and ...
Breaking Biology News(10 mins):Battling superbugs 2Battling superbugs 3Battling superbugs 4Engineered proteins stick like glue -- even in water 2Engineered proteins stick like glue -- even in water 3New hadrosaur noses into spotlight 2
... The U.S. Department of Energys Office of Science ... publication, Facilities for the Future of Science: A Twenty-Year ... in deploying the scientific facilities and instruments that the ... the frontiers of science and support the Departments missions. ...
... -- Growing recognition of the importance of health as ... has prompted the Proceedings of the National Academy of ... Health to its existing section on Sustainable Development. The ... editorial by Barry R. Bloom, Dean of the Harvard ...
... has published recent findings that reveal some of the factors underlying ... The paper, Stem Cell Aging is Controlled both Intrinsically and ... issue of Cell Stem Cell. Lei Pan, Predoctoral Researcher, and Ting ... respectively. It is widely ...
Cached Biology News:DOE publishes update of plan: 'Facilities for the Future of Science: A 20-Year Outlook' 2DOE publishes update of plan: 'Facilities for the Future of Science: A 20-Year Outlook' 3DOE publishes update of plan: 'Facilities for the Future of Science: A 20-Year Outlook' 4DOE publishes update of plan: 'Facilities for the Future of Science: A 20-Year Outlook' 5Data on life expectancy show many countries clustered in high mortality traps 2Data on life expectancy show many countries clustered in high mortality traps 3Stowers Institute's Xie Lab demonstrates dual intrinsic and extrinsic control of stem cell aging 2
(Date:9/22/2014)... Philadelphia, Pa. (PRWEB) September 22, 2014 ... develops rapid diagnostics for the food and beverage ... assay will be distributed under a non-exclusive agreement ... products and services. , Enartis, an Esseco Group ... BRETT to winemakers in California and other global ...
(Date:9/22/2014)... The US markets on Friday, September 19, ... Jones Industrial Average finished at 17,279.74, up 0.08% and ... S&P 500 finished the session 0.05% lower at 2,010.40. ... finished on a positive note. The S&P 500 Health ... 0.10%, with the index gaining 6.95% in the previous ...
(Date:9/21/2014)... time, scientists have discovered how to produce ultra-thin "diamond ... greater than that of today,s strongest nanotubes and polymers. ... led by John V. Badding, a professor of chemistry ... 21 September 2014 issue of the journal Nature ... our discovery is intriguing because the threads we formed ...
(Date:9/19/2014)... -- InterMune, Inc. (Nasdaq: ITMN ) today announced ... settle the litigation in the Delaware Court of Chancery ... as of August 22, 2014, among Roche Holdings, Inc., ... of the Memorandum of Understanding, the Company agreed to ... exhibit reflecting the amendment to the Company,s Schedule 14D-9 ...
Breaking Biology Technology:Invisible Sentinel's Test for Wine-Spoilage Microbe to be Distributed by Enartis in Multiple Markets Globally 2Invisible Sentinel's Test for Wine-Spoilage Microbe to be Distributed by Enartis in Multiple Markets Globally 3Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 2Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 3Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 4Stock Updates on Biotech Industry - Array BioPharma, Enzon Pharma, Alkermes, Amarin, and Synergy Pharma 5Smallest possible diamonds form ultra-thin nanothreads 2Smallest possible diamonds form ultra-thin nanothreads 3Smallest possible diamonds form ultra-thin nanothreads 4InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 2InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 3InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 4InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 5InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 6InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 7InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 8InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 9InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 10InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 11InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 12InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 13InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 14InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 15InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 16InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 17InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 18InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 19
... 2011 Pharmaceutical organizations rely heavily on internal ... Faced with a constantly evolving communication environment, companies ... with the most appropriate tactic. It ... is the most effective approach for the many ...
... discovery of a new class of dual-acting antimalarial compounds - ... Science online, at the Science Express website ... and blood infections, attacking the Plasmodium parasite at both stages ... how scientists developed a novel assay to determine liver stage ...
... Today BioSpace , the leading life sciences employment ... Campaign , marking the 7th edition. ... highlights leading organizations across the northwestern United States and ... electronic and printed campaign map that is ...
Cached Biology Technology:Internal and External Communications Excellence for the Pharmaceutical Industry: Increasing Organizational Effectiveness 2Dual-acting class of antimalarial compounds discovered with potential to prevent and treat malaria 2Dual-acting class of antimalarial compounds discovered with potential to prevent and treat malaria 3BioSpace Spotlights Northwest's Life Science Community 2