Navigation Links
North American freshwater fishes race to extinction
Date:8/9/2012

North American freshwater fishes are going extinct at an alarming rate compared with other species, according to an article in the September issue of BioScience. The rate of extinctions increased noticeably after 1950, although it has leveled off in the past decade. The number of extinct species has grown by 25 percent since 1989.

The article, by Noel M. Burkhead of the US Geological Survey, examines North American freshwater fish extinctions from the end of the 19th Century to 2010, when there were 1213 species in the continent, or about 9 percent of the Earth's freshwater fish diversity. At least 57 North American species and subspecies, and 3 unique populations, have gone extinct since 1898, about 3.2 percent of the total. Freshwater species generally are known to suffer higher rates of extinction than terrestrial vertebrates.

Extinctions in fishes are mostly caused by loss of habitat and the introduction of nonindigenous species. In North America, there are more freshwater fish species in a typical drainage to the east of the Great Continental Divide than to the west, where a greater proportion of species have gone extinct or are found nowhere else.

Estimating the number of extinctions relies on scrutiny of historical records and careful estimation procedures, since the last populations of a species are often recognized as such only in hindsightthere is typically a lag of several years from the last observation of a species and its estimated year of extinction. Estimates are complicated by the fact that, on average, 6.7 new species are discovered each year, and occasionally a species thought to have gone extinct is "rediscovered." Nonetheless, Burkhead concludes that between 53 and 86 species of North American freshwater fishes are likely to have gone extinct by 2050, and that the rate of extinction is now at least 877 times the background extinction rate over geological time.


'/>"/>

Contact: Tim Beardsley
tbeardsley@aibs.org
703-674-2500 x326
American Institute of Biological Sciences
Source:Eurekalert

Page: 1

Related biology news :

1. Active forest management to reduce fire could help protect northern spotted owl
2. Hidden secrets in the worlds most northerly rainforests
3. NOAA plankton surveys, second longest in the North Atlantic, add to new global effort
4. Webcast: Public forum with North Americas environment ministers on community, ecosystem resilience
5. A new species of wirerush from the wetlands in northern New Zealand
6. Scientists discover new trigger for immense North Atlantic plankton bloom
7. Eddies, not sunlight, spur annual bloom of tiny plants in North Atlantic
8. Seabirds study shows plastic pollution reaching surprising levels off coast of Pacific Northwest
9. UCSB scientists compile first study of potential for tsunamis in northwestern California
10. University of North Texas Health Science Center Advances Forensic Research by Investing in Semiconductor DNA Sequencing Technology
11. Grants add to Northwestern-Qatar partnership
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... November 18, 2014 According to ... by Systems (Video, RFID, Access Control, Intrusion Detection, Parking ... Banks, Government), Component Service Geography - Global Forecasts to ... is projected to be around $25 Billion in 2014 ... growing at a CAGR of 8.69%. Browse ...
(Date:11/21/2014)... 2014 Strict laws against distracted driving and ... North American and European automotive sector towards gesture recognition ... systems that are intuitive and able to retrieve information ... New analysis from Frost & Sullivan,s ... Europe and North ...
(Date:11/21/2014)... 2014   Atmel® Corporation (NASDAQ: ... touch technology solutions, today launched the industry,s first family ... widest V cc range from 1.7V to 5.5V. ... I 2 C bus communication speeds, and are available ... them ideal for consumer, industrial, computer, and medical applications. ...
Breaking Biology News(10 mins):Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4
... at US colleges and universities that teach mostly ... BioScience for coordinating networks to expand the ... institutions. The group, which has launched a ... coordination of current research efforts will allow "transformative ...
... A common component in webcams may help drug makers ... an unhealthy change in the way the heart beats. Researchers ... webcam technology to create a tool to look at the ... cardiomyocytes. These findings were published in the journal, Lab ...
... -- MIT chemical engineers have designed a new type of ... tumors: They are more acidic than healthy tissues. Such ... be designed to carry virtually any type of drug, says ... for Integrative Cancer Research at MIT and senior author of ...
Cached Biology News:Webcam technology used to measure medications' effects on the heart 2MIT: Removable 'cloak' for nanoparticles helps them target tumors 2
(Date:12/22/2014)... Brussels (PRWEB) December 22, 2014 The ... the global leader of technical training across the life ... Clinical Data Management (SCDM) to provide the organization's ... certification programs —providing access to the more than 350 ... SCDM members with 10% off when registering for a ...
(Date:12/22/2014)... , Dec. 22, 2014 /PRNewswire/ - RepliCel Life ... regenerative medicine company focused on the development of autologous ... out of the University of Calgary in conjunction with ... Carolina, which further validates the company,s ongoing clinical research ... effects of pattern baldness. The paper entitled ...
(Date:12/22/2014)... , Dec. 22, 2014 GenomeDx Biosciences ... Decipher Prostate Cancer Classifier, a genomic test for prostate ... node-negative, high-risk men managed by radical prostatectomy without adjuvant ... prostatectomy is relatively uncommon, using tumor genomics to identify ... metastatic disease is an important advance. The study has ...
(Date:12/22/2014)... The American Journal of Hematology/Oncology, a ... editorials addressing developments and pathways related to oncological ... article exploring the role of follicle-stimulating hormone (FSH) ... prostate cancer. , The article references seminal ... there could be a connection to prostate cancer ...
Breaking Biology Technology:CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4
... the nation in its friendliness to small business and entrepreneurs, ... which released its 10th annual rankings last week. , ,The ... group headquartered in Washington, D.C. , ,According to SBE Council ... study, "The 'Small Business Survival Index' aims to ...
... of private colleges and universities in Wisconsin will work ... of Jenzabar, Inc. of Cambridge, Mass. , ... Wisconsin Association of Independent Colleges and Universities to ... Jenzabar EX ERP System, Jenzabar's Internet Campus Solution and ...
... important is the biotech industry to the economy of a ... , ,Better yet, look at the numbers. , ,That's ... Monica-based Milken Institute , did for a landmark study ... held in Philadelphia. Philly leaders wanted to know where that ...
Cached Biology Technology:Better collaboration urged to further Wisconsin biotech 2
...
Experion spin filters are used to filter the gel matrix and gel stain solution prior to use with the Experion automated electrophoresis system. Supplied as 10 spin filters....
... use in the Microsart e.motion are sterile-sealed, without ... a specially designed individual package on a band. ... of membrane filter units ensures that they are ... sealed band guarantees uniform dispensing of the individual ...
... The model 55S Rocking Shaker provides ... and blotted membranes. The very slow ... degree of tilt provide a gentle ... over gels and blotted membranes to ...
Biology Products: