HOME >> BIOLOGY >> NEWS
Crickets on Hawaiian Island develop silent wings in response to parasitic attack

RIVERSIDE, Calif. -- In only a few generations, the male cricket on Kauai, one of the Hawaiian Islands, underwent a mutation a sudden heritable change in its genetic material that rendered it incapable of using song, its sexual signal, to attract female crickets, according to a new study by UC Riverside evolutionary biologists.

In addition, the researchers found that although the new male crickets' wings lack the file and scraper apparatus required for producing sound, the males are able to mate successfully with females, thus ensuring evolutionary success. The males accomplish this with a change in behavior, suggesting that behavior can help what may seem like a harmful mutation spread.

The research team, led by Marlene Zuk, a professor of biology, found that greater than 90 percent of male field crickets (Teleogryllus oceanicus) on Kauai shifted in less than 20 generations from having normal wings to mutated "flat wings" that inhibit the crickets from calling. Like all mutations, the wing alteration arose spontaneously, but it likely spread, the researchers conclude, because it offered protection from a deadly parasitic fly (Ormia ochracea), which uses the cricket's song to locate crickets as hosts.

Upon finding a male cricket, the fly deposits larvae onto it; these then burrow into the cricket, develop inside, and subsequently kill the cricket when they emerge from its body. Of three Hawaiian Islands (Oahu, the Big Island of Hawaii, and Kauai) where the cricket and fly co-occur, Kauai, where the rapid spread of this wing mutation in male crickets was observed, has the highest prevalence of the parasitic fly.

Study results appear in Biology Letters, a scientific journal of the Royal Society in the United Kingdom, publishing short papers from across the biological sciences.

"With each visit we made to Kauai since 1991, we observed fewer crickets," said

Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
22-Sep-2006


Page: 1 2 3

Related biology news :

1. New species and new records of marine species discovered in NW Hawaiian Islands
2. First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands
3. Hawaiian soils reveal clues to cultural history
4. Finding hidden invaders in a Hawaiian rain forest
5. World Wildlife Fund warns against iron dumping experiment near the Galapagos Islands
6. UF scientists discover new genus of frogmouth bird in Solomon Islands
7. Islands spark accelerated evolution
8. Rhode Island physician honored nationally for establishing first HIV menopause clinic
9. Pacific Islands paradise protected
10. Eruption update: Island in British Overseas Territory is growing in size
11. Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

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


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)... 16, 2017   Bridge Patient Portal , ... MD EMR Systems , an electronic medical ... GE, have established a partnership to build an ... the GE Centricity™ products, including Centricity Practice Solution ... These new integrations will allow healthcare delivery ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... implantation and pregnancy rates in frozen and fresh in vitro fertilization (IVF) ... and maternal age to IVF success. , After comparing the results from the ...
Breaking Biology Technology:
Cached News: