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:3/28/2017)... 28, 2017 The report "Video ... Monitors, Servers, Storage Devices), Software (Video Analytics, VMS), and ... Global Forecast to 2022", published by MarketsandMarkets, the market ... is projected to reach USD 75.64 Billion by 2022, ... The base year considered for the study is 2016 ...
(Date:3/24/2017)... March 24, 2017 The Controller General of Immigration ... Abdulla Algeen have received the prestigious international IAIR Award for ... Continue Reading ... ... Deputy Controller Abdulla Algeen (small picture on the right) have received the ...
(Date:3/23/2017)... 2017 The report "Gesture Recognition and Touchless Sensing Market ... - Global Forecast to 2022", published by MarketsandMarkets, the market is expected to ... between 2017 and 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:9/22/2017)... ... September 22, 2017 , ... Precision Periodontics and Implant ... and LAPIP™ laser treatments. Drs. Hoge and Zalewsky are members of an elite ... and less painful option that produces real results. , "Like many of my ...
(Date:9/21/2017)... ... (PRWEB) September 21, 2017 , ... ... and technical congress to review the latest knowledge on these products, which are ... speakers will discuss the impact of Biostimulants on Plant Nutrition, Abiotic Stresses, Plant ...
(Date:9/21/2017)... , ... September 21, 2017 , ... Lajollacooks4u welcomed the ... The organization, a worldwide society of professional women with high achievement in the ... its annual dinner. , Twelve members began with an olive oil tasting ...
(Date:9/20/2017)... (PRWEB) , ... September 20, ... ... (IPS), a leading global provider of engineering, architecture, project controls, construction management, ... prefabricated cleanrooms, today announced the unveiling of the iCON™ brand which represents ...
Breaking Biology Technology:
Cached News: