HOME >> BIOLOGY >> NEWS
Mosquito fish may be wiping out amphibians

ONE of the oldest methods of biological control-introducing mosquito fish to eat disease-carrying mosquito larvae-is spawning an environmental disaster. It turns out that the fish prefer eating tadpoles, and this may be a leading cause of the crash in amphibian populations round the world.

"Exotic predators are one of the top three causes of amphibian decline, and mosquito fish are one of these major predators," says Lee Kats of Pepperdine University in Malibu, California. He calls use of the fish "archaic" and says it needs to be re-examined.

Mosquito fish (Gambusia affinis) are native to the US and Mexico. Since early this century governments in the US, Hawaii, Canada, the former Soviet Union, New Zealand and Australia have introduced the fish to exploit their appetite for mosquito larvae.

But Kats suspected that the fish also have a taste for other delicacies. In 1996, he showed that they eat the larvae of the California newt (Taricha torosa), but critics said the studies revealed little, as the newts were the only food on offer.

So Kats and his colleague Jeff Goodsell tested whether the fish eat amphibians when mosquito larvae are also available. They placed two mosquito fish in tanks containing either mosquito larvae, tadpoles of the Pacific treefrog (Hyla regilla), or a mixture of the two with twice as many larvae as tadpoles, to replicate natural conditions in Santa Monica's rivers. The fish had completely undiscerning tastes. They munched their way through all mosquito larvae and tadpoles in the single-prey tanks and also finished off the mixed tank, gobbling up tadpoles and mosquito larvae in no particular order (Conservation Biology, vol 13, p 921).

Recreating the experiments in rivers showed that wild mosquito fish actually have a preference for tadpoles. Around 65 per cent of stream-caught fish had tadpoles in their stomachs, but only 56 per cent had mosquito larvae.

In the Santa Monic
'"/>

Contact: Claire Bowles
claire.bowles@rbi.co.uk
44-171-331-2751
New Scientist
25-Aug-1999


Page: 1 2

Related biology news :

1. Rutgers-Newark scientist: Mosquitoes may carry lethal parasite
2. Mosquito researchers track dengue fever in Sonora, Mexico
3. Mosquitoes vs. malaria: How we can win the fight
4. Mosquitoes infected with La Crosse encephalitis found in four Southwest Virginia counties
5. Mosquito genome sequence--Published in the journal Science
6. Mosquitoes repelled by tomato-based substance
7. Mosquitoes have discriminating tastes, UF researchers find
8. Mosquitofish threaten amphibians
9. Forecasting The El Niño-Driven Ebb And Flow Of A Rogue Mosquito
10. Curing Malaria, Controlling Mosquitoes Symposium Set For AAAS Meeting
11. UF Researcher Designs Pill To Control Mosquitoes

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


(Date:9/12/2018)... Calif. (PRWEB) , ... September 10, 2018 , ... ... a paper detailing the performance of its new Multiplexed Ion Beam Imaging (MIBITM) ... September 6 issue. This study will also be shared during a webinar presented ...
(Date:9/7/2018)... (PRWEB) , ... September 05, 2018 , ... ... Platform for a mAb manufacturing facility late last year, IPS-Integrated Project Services, LLC ... the manufacturing of autologous cell therapies. The iCON solution provides a pre-fabricated modular ...
(Date:8/31/2018)... ... 30, 2018 , ... R3 Stem Cell, the nation's leader ... clients. The freezers are very convenient for practices to maintain regenerative biologics on ... amniotic and umbilical cord tissue. They are stored at -80 degrees Celsius, which ...
Breaking Biology News(10 mins):
(Date:9/13/2018)... ... ... Asymmetrex’s director, James L. Sherley, M.D., Ph.D., asks audiences questions like, ... have the means to measure the number of drug molecules in drug development research ... what’s holding up progress in stem cell medicine.” , “Can you imagine taking an ...
(Date:9/12/2018)... ... September 11, 2018 , ... Leading ... Association of Feline Practitioners Conference (AAFP) later this month. The company’s ... cell therapy for the treatment of chronic kidney disease in felines at a ...
(Date:9/12/2018)... ... September 12, 2018 , ... ... management professional and former Senior Director of Regulatory Affairs and Quality Systems at ... Senior Director of Regulatory Affairs and Quality Systems at WellDoc, Inc., she conducted ...
(Date:9/7/2018)... ... 2018 , ... The Discovery on Target (DOT) conference in ... preeminent event on novel drug targets.” BellBrook Labs’ high throughput screening (HTS) platforms, ... targets in a quest to find new treatments for disease. , BellBrook Labs ...
Breaking Biology Technology:
Cached News: