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"Handing out exotic mosquitofish as a control of mosquitoes is an outdated government policy that needs to be changed," says Lee Kats of Pepperdine University in Malibu, California, who presents this research with Jeff Goodsell in the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:4/3/2017)...  Data captured by IsoCode, IsoPlexis Corporation,s ... statistically significant association between the potency of ... objective response of cancer patients post-treatment. The ... cancer patients will respond to CAR-T cell ... to improve both pre-infusion potency testing and cell ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
(Date:3/27/2017)... N.Y. , March 27, 2017  Catholic ... Information and Management Systems Society (HIMSS) Analytics for ... EMR Adoption Model sm . In addition, CHS ... of U.S. hospitals using an electronic medical record ... for its high level of EMR usage in ...
Breaking Biology News(10 mins):
(Date:8/15/2017)... ... August 15, 2017 , ... JULABO USA introduces its ... new website makes it easy to navigate through the site whether you’re in ... detailed product information, educational industry content and visit the company’s social media accounts, ...
(Date:8/11/2017)... ... 11, 2017 , ... A staple in the community for more than 60 ... key elements including a new digital marketing strategy and updated logo. , As part ... has partnered with the South Texas Blood & Tissue Center for the month of ...
(Date:8/10/2017)... Linda, Ca (PRWEB) , ... August 09, 2017 ... ... exosomes for regenerative medicine applications in the clinic is here. The team at ... EVs present in conditioned medium for clinical studies. , Dr. Travis Antes, ...
(Date:8/10/2017)... ... August 10, 2017 , ... SPIE, the ... Ltd. as its exclusive sales representative for SPIE Journals in Japan. Kinokuniya has ... Digital Library in Japan. , “We look forward to expanding our relationship with ...
Breaking Biology Technology:
Cached News: