HOME >> BIOLOGY >> NEWS
Insect yields clues to evolution of species

(Santa Barbara, Calif.) Studies of a California insect, the walking stick, are helping to illuminate the process of evolution of new species, according to research published in this weeks issue of Nature.

The insect, Timema cristinae, named for Cristina Sandoval, a researcher at the University of California, Santa Barbara who was the first to discover it, is found in the Santa Ynez Mountains on two types of plants. Essentially the walking sticks have evolved to look like a leaf of the plant they inhabit. Birds and lizards are its main predators.

"Youve got to have very good camouflage to trick a bird," said Sandoval, noting that birds have very good vision and are visual predators.

The insect exhibits two genetically determined color patterns. The unstriped insect is more commonly found on the plant Ceanothus spinosus (commonly called blue lilac) and a striped design is more common on those insects inhabiting the plant Adenostoma fasciculatum (commonly called chemise).

According to the study, the research provides the first clear demonstration that host-plant adaptation can promote the parallel evolution of reproductive isolation. The researchers tested hundreds of insects in the lab and found that those inhabiting the same type of plant were more likely to mate with each other than they were to mate with those residing on different plants -- even though they are the same species. The research indicates that habitat may play a crucial role in the early stages of separation into different species (speciation).

"We dont know why, but something about adapting to a host plant smell, size, or a combination of things drives this reproductive isolation," said Sandoval. "This is an example of speciation in process."

Additionally, information from DNA sequences revealed that such divergence in mating preferences and morphology has evolved numerous times in this species, according to the article. Thus, the research indica
'"/>

Contact: Gail Brown
gail.brown@ia.ucsb.edu
805-893-7220
University of California - Santa Barbara
22-May-2002


Page: 1 2

Related biology news :

1. Insecticide resistance: A constraint on evolutionary change
2. The scoop on poop: Insect feces, dead leaves may provide clues to health of world
3. Insect antibiotics Resistance is futile!
4. Insects survival, mating decrease with age in wild, researchers discover
5. Insect infestation models may shed light on insect and disease outbreaks
6. Insect bites on plants reduce photosynthesis, imaging device shows
7. Insects caught in a nutrient-poor food web
8. Insect defenses point the way to defeating bacterial antibiotic resistance
9. Bugscope Gives Internet Users Anywhere Chance To Study Insects
10. A Mothers Love? New UD Theory Explains Why Good Insect Moms Risk Death To Save Their Only Children
11. Human/Insect/Jellyfish Genes Team To Quiet "Hyper" Nerve Cells

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


(Date:12/20/2016)... and GENEVA, Dec, 20, 2016   Valencell ... sensor technology, and STMicroelectronics (NYSE: STM), a ... of electronics applications, announced today the launch of ... for biometric wearables that includes ST,s compact ... Valencell,s Benchmark™ biometric sensor system. Together, SensorTile ...
(Date:12/16/2016)... Research and Markets has announced the addition of the "Biometric ... to their offering. ... The biometric vehicle access system market, in terms of value, ... to 2021. The market is estimated to be USD 442.7 Million ... The growth of the biometric vehicle access system market is fueled ...
(Date:12/15/2016)... Calif. , Dec. 15, 2016   WaferGen ... publicly held genomics technology company, announced today that on ... Listing Qualifications Department of The Nasdaq Stock Market LLC ... closing bid price of WaferGen,s common stock had been ... Accordingly, WaferGen has regained compliance with Listing Rule 5550(a)(2) ...
Breaking Biology News(10 mins):
(Date:1/12/2017)... ... January 12, 2017 , ... After her brain cancer ... gave her only a few months to live. Now a paper publishing January ... Rosendahl’s disease and increased both the quantity and quality of her life: Adding ...
(Date:1/12/2017)... and Pune, India , January 12, 2017 ... Market by Type and End Users - Global Opportunity Analysis and Industry Forecast, 2014-2022," ... 2022 from $2,921 million in 2015, growing at a CAGR of 15.07% during the ... ... Allied Market Research Logo ...
(Date:1/11/2017)... ... January 11, 2017 , ... Phase 1 clinical trial ... of the investigational anti-cancer agent tucatinib (formerly ONT-380) against HER2+ breast cancer. The ... percent of these heavily pretreated patients saw clinical benefit from the drug, with ...
(Date:1/11/2017)... ... January 11, 2017 , ... Photonics industry and STEM ... are commending the U.S. Congress and President Obama for their recognition of the ... the American Innovation and Competitiveness Act (AICA). , The language of the act ...
Breaking Biology Technology:
Cached News: