Navigation Links
As super-predators, humans reshape their prey at super-natural speeds
Date:1/12/2009

SANTA CRUZ, CA--Fishing and hunting are having broad, swift impacts on the body size and reproductive abilities of fish and other commercially harvested species, potentially jeopardizing the ability of entire populations to recover, according to the results of a new study that will appear in the January 12, 2009, online issue of the Proceedings of the National Academy of Sciences (PNAS).

Human predation is accelerating the rate of observable trait changes by 300 percent above the pace observed within natural systems, and 50 percent faster than in systems subject to other human influences, including pollution, according to Chris Darimont, the lead author of the paper entitled "Human Predators Outpace Other Agents of Trait Change in the Wild."

Not only fast, the changes are also dramatic in magnitude: Harvested populations are on average 20 percent smaller in body size than previous generations, and their age of first reproduction is on average 25 percent earlier, according to Darimont, a postdoctoral researcher in environmental studies at the University of California, Santa Cruz.

"Harvested organisms are the fastest-changing organisms of their kind in the wild, likely because we take such high proportions of a population and target the largest," said Darimont. "It's an ideal recipe for rapid trait change."

The study is the first to calculate the pace of evolution in commercially harvested organisms and compare the rates to other systems. The team calculated the rates of trait change with a metric appropriately called the 'Darwin,' which allowed the comparison of changes across traits and species among natural and human-modified systems, including 'human predator' systems. It builds on research by coauthor Michael Kinnison and colleagues that has documented the evolutionary impact of other human activities, such as pollution and the introduction of species to new environments.

Darimont's findings are b
'/>"/>

Contact: Jennifer McNulty
jmcnulty@ucsc.edu
831-459-2495
University of California - Santa Cruz
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Snails and humans use same genes to tell right from left
2. Pigs and dogs can bridge gap between mice and humans in developing new therapies
3. Escherichia coli bacteria transferring between humans and mountain gorillas
4. Mineral oil contamination in humans: A health problem?
5. Longevity, cancer and diet connected: New research in worms could apply to humans
6. Why some primates, but not humans, can live with immunodeficiency viruses and not progress to AIDS
7. Thumbs up -- a tiny ancestral remnant lends developmental edge to humans
8. No more big stink: scent lures mosquitoes, but humans cant smell it
9. Perfect pitch in humans far more prevalent than expected
10. Large reservoir of mitochondrial DNA mutations identified in humans
11. Humans response to risk can be unnecessarily dangerous, finds Tel Aviv University study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... habitats and trees and not just asphalt and recreation ... University of Colorado Boulder study. , Working on class ... benefits for youth, according to a paper published in ... is one of the first of its kind to ... settings and stress. , "Many schools already offer stress ...
(Date:7/22/2014)... immune cell widely believed to exacerbate chronic adult ... sclerosis (MS), can actually protect the brain from ... progression of neurodegenerative diseases, according to Cleveland Clinic ... Nature Communications . , The research team, led ... of Neurosciences at Cleveland Clinic,s Lerner Research Institute, ...
(Date:7/21/2014)... ROUGE LSU,s Mark Batzer, Boyd Professor and Dr. ... Sciences in the College of Science, contributed to an ... titled "The Common Marmoset Genome Provides Insight into Primate ... Batzer contributed analysis of "jumping genes," or mobile elements ... mechanism in the genome. The marmoset is important because ...
Breaking Biology News(10 mins):Natural-terrain schoolyards reduce children's stress, says Colorado University-Boulder study 2Natural-terrain schoolyards reduce children's stress, says Colorado University-Boulder study 3Cleveland Clinic researchers discover neuroprotective role of immune cell 2LSU's Mark Batzer contributes to Nature Genetics article on marmoset genome 2
... a fresh water supply is discussed in a special ... Desalination. With predictions that more than 3.5 billion people ... the year 2025, the challenge is to find an ... Global climate change, desertification, and over-population are already taking ...
... of mentoring in developing the scientists of the future ... Awards for Excellence in Science, Mathematics and Engineering Mentoring ... Science Foundation (NSF).The winners of the 2006 competition -- ... number of scientific disciplines -- were announced at the ...
... (LRI) strategy of backing innovative investigations into systemic lupus, ... million in large-scale funding from the National Institutes of ... progress report has determined. To date, ... the 7-year-old LRIan Institute investment of $9 million. A ...
Cached Biology News:Nuclear desalination 2Nuclear desalination 3President honors mentors of scientists and engineers 2President honors mentors of scientists and engineers 3President honors mentors of scientists and engineers 4President honors mentors of scientists and engineers 5President honors mentors of scientists and engineers 6President honors mentors of scientists and engineers 7Lupus Research Institute strategy delivers $30 million in national funding 2
(Date:7/22/2014)... and SHENZHEN, China , July ... LTD, (BGI Tech), a subsidiary of BGI, the ... launch of a new human whole exome sequencing ... newly offered service includes in-depth bioinformatics analysis and ... until December 31, 2014. Complete ...
(Date:7/22/2014)... , July 22, 2014  Semler Scientific, Inc. ... medical risk assessment company that develops patented products ... evaluating chronic diseases, today announced that it will ... open of U.S. financial markets on July 25, 2014. Doug ... host a conference call at 11 a.m. EDT, July 25, ...
(Date:7/22/2014)... SILVER SPRING, Md. , July 22, 2014 ... ) announced today that it will release its ... on Tuesday, July 29, 2014. United ... July 29, 2014, at 9:00 a.m. Eastern Time.  ... international callers dialing 1-970-315-0533.  A rebroadcast of the ...
(Date:7/22/2014)... (PRWEB) July 22, 2014 Biofeedback ... hyperactivity disorder (ADHD) is diagnosed, selecting medication to best ... error. Analyzing brain patterns by using electroencephalography (EEG) can ... and thus lower the risk of adverse drug events. ... and Biomarkers” in the current issue of the ...
Breaking Biology Technology:BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 2BGI Tech Launches Human Whole Exome Sequencing Service on Complete Genomics' Advanced Platform 3Semler to Report Second Quarter 2014 Financial Results and Host Conference Call on July 25, 2014 2Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 2Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 3
... Ohio and LOD, Israel, November 3 Simbionix,USA ... hands-on,curriculum for training medical professionals, today announced that ... US Marketing Director on,November 10th, 2008. Gary Zamler, ... Simbionix has enjoyed double digit revenue growth in,both ...
... Telomolecular CEO, Matthew Sarad, clarifies the scope and terms of his ... ... (PRWEB) November 3, 2008 -- Telomolecular, a Rancho Cordova, California Corporation, ... therapeutics to treat diseases of aging and cancer, particularly diseases related ...
... compound in sufficient and rapidly produced yields, potentially ... could boost semiconductor capabilities for large-area applications. , ... the first heterometallic gallium-indium hydroxide nanocluster was the ... of nitrosobenzene. , The substitute was identified during ...
Cached Biology Technology:William E. Lewandowski to Lead Simbionix US Marketing Team in Simbionix's Strategic Expansion in the US Market 2Former Telomolecular CEO Clarifies SEC Settlement 2Former Telomolecular CEO Clarifies SEC Settlement 3New nanocluster to boost thin films for semiconductors 2
...
...
... Experion software, PC, is used ... the data obtained from the Experion ... data in electropherogram and simulated gel ... other calculations in a Results table. ...
... for use in the Microsart e.motion are sterile-sealed, ... in a specially designed individual package on a ... band of membrane filter units ensures that they ... the sealed band guarantees uniform dispensing of the ...
Biology Products: