HOME >> BIOLOGY >> NEWS
Mosquitofish threaten amphibians

Sometimes you have to prove the obvious to get something done. The mosquitofish is being distributed around the world to control mosquitoes--without regard for its effects on other aquatic species. New research shows that mosquitofish devour tadpoles just as readily as mosquito larvae and so can decimate native amphibians.

"Handing out exotic mosquitofish as a control of mosquitoes is an outdated government policy that needs to be changed," says Lee Kats of Pepperdine University in Malibu, California, who presents this research with Jeff Goodsell in the August issue of Conservation Biology. This is the first study to demonstrate unequivocally that mosquitofish show no preference for mosquito larvae.

Distributed by the Los Angeles County Mosquito Abatement and Vector Control Center, mosquitofish have become established in many streams in the Santa Monica Mountains within the last 15 years. Because these streams have no native fish, the amphibians that live there lack defenses against fish predation. Amphibians native to these streams include the California newt, the Pacific treefrog and the California treefrog, which is a candidate for protected status.

Previous studies have shown that mosquitofish eat amphibians such as California newt larvae in Santa Monica Mountain streams. But these studies have been criticized because the mosquitofish were not offered alternate prey, leaving them no choice but to eat newt larvae.

Kats and Goodsell addressed this criticism by offering mosquitofish both Pacific treefrog tadpoles and mosquitoes. The researchers put bottomless two-by-two-foot tubs in fishless Santa Monica Mountain streams and added two mosquitofish, 20 tadpoles and 40 (low-density) or 80 (high density) mosquito larvae. These predator and prey densities approximated those naturally found in local streams.

After six hours, the mosquitofish in the "low-density" tubs had eaten all the mosquito larvae and more than 85% of tadpoles. Similarly, t
'"/>

Contact: Lee Kats
lkats@pepperdine.edu
310-456-4310
Society for Conservation Biology
29-Jul-1999


Page: 1 2

Related biology news :

1. Danger spots identified for threatened grizzly bear
2. 51 globally threatened species get new lease on life in the Caucasus
3. Disease threatens cucumbers, pumpkins, and other vine crops
4. Bighorn sheep threatened by climate change
5. California pistachio industry threatened by potentially devastating disease
6. Climate change may threaten more than one million species with extinction
7. Prescribed burns can threaten pine Savannah amphibians
8. Tourism to Earths most threatened areas surges by over 100 percent in last decade
9. More than 700 threatened species remain completely unprotected, new study shows
10. Trawlers threaten oceans biodiversity
11. Lake ecosystem critical to East African food supply is threatened by climate change

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/29/2016)... Nearly one billion matches per second with DERMALOG,s high-speed AFIS    ... ... DERMALOG is Germany's largest Multi-Biometric supplier: The company's Fingerprint ... ... Multi-Biometric supplier: The company's Fingerprint Identification System is part of an efficient ...
(Date:11/22/2016)... According to the new market research report "Biometric System Market by ... Component (Hardware and Software), Function (Contact and Non-contact), Application, and Region - ... grow from USD 10.74 Billion in 2015 to reach USD 32.73 Billion ... Continue Reading ... ...
(Date:11/19/2016)... 18, 2016 Securus Technologies, a leading provider ... safety, investigation, corrections and monitoring, announced today that it ... to have an independent technology judge determine who has ... high tech/sophisticated telephone calling platform, and the best customer ... do most of what we do – which clearly ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... ... 2016 , ... Orthogonal, a Chicago-based medical device software company, ... 510(k) clearance for their flagship medical device, SimplECG. , With this FDA approval, ... rely on cloth-based nanosensors. While other companies have attempted to focus on wearable ...
(Date:12/2/2016)... ... December 02, 2016 , ... Robots will storm the Prudential ... December 3rd, 2016. The event, which is held on the United Nations International Day ... with Disabilities back into the workplace. Suitable Technologies is partnering with NTI to showcase ...
(Date:12/2/2016)... The immunohistochemistry (IHC) market is projected ... of 7.3% during the forecast period of 2016 to 2021 dominated ... accounted for the largest share of immunohistochemistry (IHC) market, by end ... , , ... market spread across 225 pages, profiling 10 companies and supported with ...
(Date:11/30/2016)... ... 30, 2016 , ... BEI Kimco, a brand of Sensata ... design that ensures high alignment accuracy by preventing unwanted shaft rotation. The new ... extreme precision is required, such as in medical equipment, laboratory instrumentation, clean rooms, ...
Breaking Biology Technology:
Cached News: