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North American freshwater fishes race to extinction

RATE THIS! +9
Posted in Science on 28th Oct, 2012 10:45 PM by AlexMuller

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.



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Comments

Author: Guest
Posted: 2012-10-29
+0
We have to develop more places that would preserve and study these species and release them again when environment is suitable. Many zoos have such initiatives. Reply
Author: Guest
Posted: 2013-09-06
+0
Tt8LaZ Thanks a lot for the article.Thanks Again. Want more. Reply
Author: Guest
Posted: 2013-09-13
+0
R9KQ6D Wow, great blog post.Much thanks again. Want more. Reply
Author: Guest
Posted: 2013-09-24
+0
F83m4q Thanks for sharing, this is a fantastic article.Much thanks again. Cool. Reply
Author: Guest
Posted: 2013-10-16
+0
TaFo6v I appreciate you sharing this article.Really thank you! Awesome. Reply
Author: Guest
Posted: 2013-10-26
+0
lERMq4 Very neat blog.Really thank you! Really Cool. Reply
Author: Guest
Posted: 2013-11-02
+0
Dk8LCs A big thank you for your article post.Thanks Again. Much obliged. Reply


 

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