HOME >> BIOLOGY >> NEWS
Genetic takeover threatens crayfish

grows faster, is larger and has more offspring than the northern clearwater crayfish.

Biologists have feared that besides outcompeting local crayfish, the rusty crayfish also hybridizes with them. However, so far this assessment has been based on morphological studies, which can be ambiguous.

To determine definitively whether introduced rusty crayfish have been hybridizing with local species, Perry and his colleagues compared the DNA of crayfish from 30 sites in the midwestern U.S. The researchers found that hybridization is common. One of the worst cases is Birch Lake, Wisconsin, where only a fourth of the crayfish still have northern clearwater crayfish genes and the entire population already looks exactly like rusty crayfish.

"Wherever the two taxa meet, [the rusty crayfish] ecologically displaces and, through hybridization, genetically assimilates and morphologically extirpates [northern clearwater crayfish] populations," say Perry and his colleagues.

Several states have restricted using the rusty crayfish for fish bait and there are calls for banning the use of live crayfish as bait. This can't come too soon. "We are rarely if ever able to get rid of an exotic species and thus introduced species like the rusty crayfish represent a permanent alteration to the system," says Perry.


'"/>

Contact: William Perry
wlperry@ilstu.edu
309-438-8176
Society for Conservation Biology
30-Nov-2001


Page: 1 2

Related biology news :

1. Genetic mutations linked to the practice of burning coal in homes in China
2. Genetic differences might help distinguish thyroid cancers
3. Genetic modification of linseed produces healthier omega 3 and 6 fatty acids
4. Wiley publishes Welcome to the Genome: A Users Guide to the Genetic Past, Present, and Future
5. Genetically modified bacterium as remedy for intestinal diseases
6. Genetic analysis rewrites salamanders evolutionary history
7. Genetic map of important tree genes outlined
8. Genetically-engineered marathon mouse keeps on running
9. Genetic clues found for common congenital brain disorder
10. Genetic mutation linked to more aggressive breast cancer found more often in African-Americans
11. Genetic discovery could dramatically reduce need for liver transplants in children

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


(Date:12/15/2016)... , Dec. 15, 2016 Advancements ... experience, health wellness and wellbeing (HWW), and ... in three new passenger vehicles begin to ... gesture recognition, heart beat monitoring, brain wave ... facial monitoring, and pulse detection. These will ...
(Date:12/12/2016)... 2016  Researchers at Trinity College, Dublin, are ... combining the material with Silly Putty. The mixture (known ... able to sense pulse, blood pressure, respiration, and ... The research team,s findings were published ... http://science.sciencemag.org/content/354/6317/1257 ...
(Date:12/7/2016)... India , December 7, 2016 According to a ... Machine Learning), Software Tool (Facial Expression, Voice Recognition), Service, Application Area, End User, ... is estimated to grow from USD 6.72 Billion in 2016 to USD 36.07 ... Continue Reading ... ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... ... January 19, 2017 , ... Genedata, ... (R&D), today announced the launch of Data Science Services , offering ... evolving field of precision medicine. , Data Science Services allows pharmaceutical ...
(Date:1/19/2017)... and GAITHERSBURG, Md. ... MKT: PIP) and Altimmune, Inc., a privately-held immunotherapeutics ... of a definitive agreement for the merger of ... current investors include Novartis Venture Fund, HealthCap, Truffle ... be a fully-integrated and diversified immunotherapeutics company with ...
(Date:1/19/2017)... AquaBounty Technologies, Inc. (AIM: ABTU; NASDAQ: AQB), ... and a majority-owned subsidiary of Intrexon Corporation (NYSE: ... listing of its common shares on the NASDAQ Stock ... "AquaBounty,s listing on NASDAQ represents an important milestone ... the U.S. markets as we advance plans for commercial ...
(Date:1/19/2017)... Ca (PRWEB) , ... January 18, 2017 , ... ... events for tech innovators, engineers, and scientists from around the world, was today ... News. The awards program is based entirely on merit and decided upon by ...
Breaking Biology Technology:
Cached News: