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"Handing out exotic mosquitofish as a control of mosquitoes is an outdated government policy that needs to be changed," says Lee Kats of Pepperdine University in Malibu, California, who presents this research with Jeff Goodsell in the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:4/19/2017)... , April 19, 2017 ... its vendor landscape is marked by the presence of ... is however held by five major players - 3M ... these companies accounted for nearly 61% of the global ... leading companies in the global military biometrics market boast ...
(Date:4/13/2017)... 13, 2017 UBM,s Advanced Design and Manufacturing ... feature emerging and evolving technology through its 3D Printing ... run alongside the expo portion of the event and ... demonstrations focused on trending topics within 3D printing and ... manufacturing event will take place June 13-15, 2017 at the ...
(Date:4/11/2017)... Research and Markets has announced the addition of the ... ... to grow at a CAGR of 30.37% during the period 2017-2021. ... been prepared based on an in-depth market analysis with inputs from ... prospects over the coming years. The report also includes a discussion ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... ... FirstHand program has won a US2020 STEM Mentoring Award. Representatives of the FirstHand ... Excellence in Volunteer Experience from US2020. , US2020’s mission is to change the ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... 13 prestigious awards honoring scientists who have made outstanding contributions to ... symposium during Pittcon 2018, the world’s leading conference and exposition for laboratory science, ...
(Date:10/9/2017)... ... October 09, 2017 , ... ... journal, Epilepsia, Brain Sentinel’s SPEAC® System which uses the surface electromyography (sEMG) ... tonic-clonic seizures (GTCS) using surface electromyography (sEMG). The prospective multicenter phase III ...
(Date:10/6/2017)... ... 2017 , ... On Tuesday, October 24th, ABC² (Accelerate Brain ... adaptive clinical trial for glioblastoma (GBM). The featured speaker will be Dr. Brian ... to the public, but registration is required. , WHAT: ABC² Brain Cancer ...
Breaking Biology Technology:
Cached News: