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"Handing out exotic mosquitofish as a control of mosquitoes is an outdated government policy that needs to be changed," says Lee Kats of Pepperdine University in Malibu, California, who presents this research with Jeff Goodsell in the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:
TAG: Mosquitofish threaten amphibians

(Date:8/25/2015)... BELLEVUE, Wash. , Aug. 25, 2015 ... systems, announced today it will unveil its "Guardian S" ... at the National Tactical Officers Association Conference on August ... Guardian S is the first-ever commercially available energetically autonomous ... research and in-field trials and is protected by more ...
(Date:8/20/2015)... , Aug. 20, 2015 The wearable ... that are active and healthy. However, wearable technology ... hospital environment to help improve diagnostic capabilities and ... from the Wearable Technologies Conference 2015 , ... applications for wearables in healthcare.    ...
(Date:8/19/2015)... 19, 2015  VOXX International Corporation (Nasdaq: ... into a Definitive Agreement to purchase the assets, ... market leader EyeLock through an acquiring entity.  Upon ... controlling interest in the acquiring entity. The closing ... due diligence.  Expanding on its existing supply chain ...
Breaking Biology News(10 mins):Sarcos to Debut First-of-its-Kind Snake Robot 2Sarcos to Debut First-of-its-Kind Snake Robot 3Leaf Healthcare Releases Video from Wearable Technology Conference on New Applications for Wearables in the Hospital Environment 2Leaf Healthcare Releases Video from Wearable Technology Conference on New Applications for Wearables in the Hospital Environment 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5
(Date:8/26/2015)... 2015  Platform therapeutic company Symic Biomedical, Inc. ... $1.5M Phase II SBIR grant from the National ... therapeutic agent to reduce arteriovenous fistula (AVF) failures, ... renal disease (ESRD) patients undergoing hemodialysis. The two-year ... and Digestive and Kidney Diseases (NIDDK), will allow ...
(Date:8/26/2015)... HONG KONG , Aug. 26, 2015 ... "Company"), China,s leading provider of ... and stem cell storage services, today announced that the ... Holdings Limited ("MO2"), an entity wholly owned by Mr. ... the Company, has acquired the outstanding shares (the "Shares") ...
(Date:8/26/2015)... ... August 26, 2015 , ... PRC Clinical, ... new business relationships with local sponsors in southern California. The Clinical Trial Management Expert ... development processes and regulatory pathways., , Stem Cell Meeting ...
(Date:8/25/2015)... ... August 25, 2015 , ... A new optical ... is described by University of Illinois researchers in the Journal of Biomedical ... In “ Breast cancer diagnosis using spatial light interference microscopy ,” published 20 ...
Breaking Biology Technology:Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 2PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 3New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 2New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 3New Optical Method Promises Faster, More Accurate Diagnosis of Breast Cancer 4
Cached News: