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"Handing out exotic mosquitofish as a control of mosquitoes is an outdated government policy that needs to be changed," says Lee Kats of Pepperdine University in Malibu, California, who presents this research with Jeff Goodsell in the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:2/1/2017)... 2017 IDTechEx Research, a leading provider of ... the availability of a new report, Sensors for Robotics: Technologies, ... Reading ... ... Source: IDTechEx Report "Sensors for Robotics: Technologies, Markets and Forecasts 2017-2027: ...
(Date:1/26/2017)... , Jan. 26, 2017  Crossmatch, a leading provider ... new solution aimed at combatting fraud, waste and abuse ... introduced at the Action on Disaster Relief conference in ... point for UN agencies and foreign assistance organizations throughout ... waste and abuse are a largely unacknowledged problem in ...
(Date:1/24/2017)... 2017 Biopharm Reports has carried out ... of nuclear magnetic resonance spectroscopy (NMR). This involved ... current practices, developments, trends and end-user plans over ... and opportunities. These areas include growth in the ... and innovation requirements, hyphenated NMR techniques, main suppliers ...
Breaking Biology News(10 mins):
(Date:2/17/2017)... ... 17, 2017 , ... Academy of Model Aeronautics (AMA), the ... of unmanned aircraft systems (UAS), are launching a joint program to promote safe ... support educational outreach efforts. , AMA and DJI will collaborate on other potential ...
(Date:2/16/2017)... MENLO PARK, Calif. and ... -- Longitude Capital, a private investment firm focused on ... today announced the promotion of Josh Richardson ... Richardson focuses on investments in biotechnology companies.  He ... and has played important roles in Longitude,s investments ...
(Date:2/16/2017)... 2017   Biostage, Inc. (Nasdaq: ... developing bioengineered organ implants to treat cancers and other ... today the closing on February 15, 2017 of its ... stock and warrants to purchase 20,000,000 shares of common ... offering was priced at $0.40 per share of common ...
(Date:2/16/2017)... Malden, MA (PRWEB) , ... February 16, 2017 ... ... viscoelastic 4-level cervical case. Dr. Kingsley Chin, professor and Harvard trained surgeon, completed ... The procedure was performed on a 55-year-old practicing female physician suffering from degenerative ...
Breaking Biology Technology:
Cached News: