Navigation Links
Even at sublethal levels, pesticides may slow the recovery of wild salmon populations
Date:12/16/2009

Biologists determined that short-term, seasonal exposure to pesticides in rivers and basins may limit the growth and size of wild salmon populations. In addition to the widespread deterioration of salmon habitats, these findings suggest that exposure to commonly used pesticides may further inhibit the recovery of threatened or endangered populations.

"Major efforts are currently underway to restore Pacific salmon habitats in an effort to recover depressed populations," says David Baldwin of the National Oceanic and Atmospheric Administration (NOAA), who co-authored the study with NOAA colleagues in the December issue of the ESA journal Ecological Applications. "However, not much research has been done to determine the importance of pollution as a limiting factor of ESA-listed species."

The researchers studied the impact of pesticides, such as diazinon and malathion, on individual salmon using pre-existing data, and then devised a model to calculate the productivity and growth rate of the population. They used several exposure scenarios to reflect realistic pesticide use across various landscapes and over time.

Pesticides include insecticides, herbicides and fungicides that are usually applied to agricultural and urban landscapes. They primarily enter waterways in spray drift, surface runoff and irrigation return flows.

"An important aim of the work was to link known sublethal effects for individual salmon to impacts on the productivity of salmon populations," explains Baldwin.

The biologists found in previous studies that, on an individual level, the pesticides directly affected the activity of acetylcholinesterase, an important enzyme in the salmon brain. As a result, the salmon experienced reductions in feeding behavior. The reductions in food were then extended using the model to calculate reductions in the growth, size, and subsequent survival at ocean migration. In one scenario, the model predicted that
'/>"/>

Contact: Nadine Lymn
nadine@esa.org
202-833-8773
Ecological Society of America
Source:Eurekalert

Page: 1 2

Related biology news :

1. Gray whales a fraction of historic levels, genetic research says
2. Folic acid lowers blood arsenic levels, according to Mailman School of Public Health study
3. New genetic variants associated with lipid levels, risk for coronary artery disease
4. Alternative methods proposed to detect pesticides and antibiotics in water and natural food
5. Satellites help ensure efficient use of pesticides
6. Pesticides persist in ground water
7. Pitt research finds that low concentrations of pesticides can become toxic mixture
8. Parasite-resistant peppers green alternatives to chemical pesticides
9. Pesticides -- easier detection of pollution and impact in rivers
10. Survey finds elevated rates of new asthma among WTC rescue and recovery workers
11. New study shows greenback cutthroat trout involved in recovery effort misidentified
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... University is paving the way for a breakthrough ... military troops exposed to poisonous chemicalsparticularly those in ... in the current issue of the journal ... which are compounds commonly used in pesticides and ... NYU School of Engineering Associate Professor of Chemical ...
(Date:7/30/2014)... uses reversible epigenetic processes to regulate its genes, and ... a picture of the genome regulation taking place in ... Genome Biology and illustrates how the truffle ... genes,. The authors say this may shed light on ... Black truffles (Tuber melanosporum), also known as Prigord truffles, ...
(Date:7/30/2014)... the Red Queen in Lewis Carroll,s Through the ... and National University of Singapore improved a 35-year-old ... over decades to millions of years. , The ... competition, incorporates the "Red Queen Effect," an evolutionary ... 1970s, which suggests that organisms must constantly increase ...
Breaking Biology News(10 mins):Engineering a protein to prevent brain damage from toxic agents 2How black truffles deal with the jumpers in their genome 2Classic Lewis Carroll character inspires new ecological model 2Classic Lewis Carroll character inspires new ecological model 3
... October 23, 2013 A promising technique for treating ... may lead to new treatments to prevent blindness, according to ... Jolla, California. The studies involved controlling the actions ... to be "junk" but are now known to fine-tune gene ...
... have found out which molecular mechanisms decide about the ... for the import of proteins into specific cell components, ... receptor remains active or is broken down after the ... regulation of the protein import into peroxisomes has been ...
... simply cannot do without lasers. We use them to print ... car components, survey roads, monitor our bloodstream, and even remove ... for Applied Solid State Physics IAF in Freiburg have developed ... a particular type of infrared laser forms the ...
Cached Biology News:New eye treatment effective in laboratory tests 2New eye treatment effective in laboratory tests 3New eye treatment effective in laboratory tests 4The yin and yang in the life of proteins 2Lasers offer an automated way to test drinking water 2Lasers offer an automated way to test drinking water 3
(Date:7/30/2014)... , July 30, 2014  AtheroNova Inc. (OTCBB: ... and development of compounds to safely regress atherosclerotic ... announces that its partner, CardioNova, has accomplished first ... trial with AtheroNova,s lead compound, AHRO-001.  This Phase ... AHRO-001 Phase 1 safety trial completed in February ...
(Date:7/30/2014)... July 30, 2014 Adding to their ... weighing boat special – Buy 2 of any ... promotion will benefit lab technicians looking for durable and ... are ideal for multiple applications including weighing liquids, solid, ... of choices including diamond-shaped, hexagonal, square, aluminum weighing, and ...
(Date:7/29/2014)... have hurdled a number of significant technological challenges ... observing technology originally created for the James Webb ... Investigator Harvey Moseley, a scientist at NASA,s Goddard ... that electrostatically actuated microshutter arrays that is, ... are as functional as the current technology,s magnetically ...
(Date:7/29/2014)... 2014) Tough, ultralight foam of atom-thick sheets can ... chemical process invented at Rice University. , In ... nanoscale building, with floors and walls that reinforce each ... materials: floors and walls of graphene oxide that self-assemble ... , The researchers say the foam could find use ...
Breaking Biology Technology:AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 2AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 3AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 4Weighing Boat Promotion Now Available at Pipette.com, Major Pipette Distributor 2Revolutionary microshutter technology hurdles significant challenges 2Revolutionary microshutter technology hurdles significant challenges 3Revolutionary microshutter technology hurdles significant challenges 4Tough foam from tiny sheets 2
... Senomyx, Inc.,(Nasdaq: SNMX ) will release its ... before the opening of the U.S. financial,markets. The Company ... Internet,broadcast that will provide a business update and a ... at 11:00 a.m. Eastern Time (8:00 a.m.,Pacific Time)., ...
... Oct. 20 GeoVax Labs, Inc. (OTC,Bulletin Board: ... for diseases caused by HIV-1 (Human Immunodeficiency Virus),and ... both DNA and,MVA components of its AIDS vaccine ... use in the upcoming Phase 2a human clinical ...
... with Industry to Educate,Promote PRV Program-, WASHINGTON, ... today announced its support of the US Food ... Industry on Priority,Review Vouchers. The Priority Review Voucher ... the development of drugs and vaccines for,neglected tropical ...
Cached Biology Technology:SENOMYX, INC. THIRD QUARTER 2008 EARNINGS CONFERENCE CALL SCHEDULED FOR NOVEMBER 6, 2008 2GeoVax's DNA and MVA Vaccines Shipped to HIV Vaccine Trials Network for Use in the Upcoming Phase 2a Trial 2GeoVax's DNA and MVA Vaccines Shipped to HIV Vaccine Trials Network for Use in the Upcoming Phase 2a Trial 3FDA Issues Draft Guidance on Priority Review Vouchers 2
Mouse monoclonal antibody raised against a full length recombinant GPT. NCBI Entrez Gene ID = GPT...
Mouse monoclonal antibody raised against a partial recombinant TPR. NCBI Entrez Gene ID = TPR...
... Each kit contains sufficient materials for 1,464 array sample ... Membrane: 4 each , Blocker BSA in PBS (10X): ... BupH Phosphate Buffered Saline: 8 packs , 10% Tween-20: ... Luminol Enhancer: 2 x 25 ml , SuperSignal West ...
... 100-120 V, is used for biolistic particle ... device employs an adjustable helium pulse to ... microcarriers from the inner wall of a ... This system has a 2 square-centimeter target ...
Biology Products: