Publication Date 01/03/2010         Volume. 2 No. 2   
Information to Pharmacists

NZ fish killed by water quality

Staff Writer

articles by this author...

Editing and Researching news and stories about global and local Pharmacy Issues

The following news item was recently published in Science Alert. It would seem that the pristine environment of New Zealand is under attack. The reasons are similar to those findings in Australia surrounding the protection of the Great Barrier Reef.

More here at this link.

Increasing urbanisation and more intensive farming are killing New Zealand's freshwater fish species by degrading water quality, says the author of a report published this week by the Ministry for the Environment.

Dr Mike Joy, a senior lecturer in the ecology group of the University's Institute of Natural Resources, reviewed 22 500 records of fish communities nationally and found they show significant decline over the past 40 years.

Key findings

• Rivers surrounded mostly by native vegetation have more fish species and healthier fish communities than rivers dominated by pastoral or urban land-cover. We cannot be certain about the reasons for this difference, although it is likely to be related to both declines in water quality and habitat condition (eg, in-stream obstacles to fish passage) that are associated with human activities on the land.

• Overall, at a national scale, the health of fish communities declined between 1970 and 2007, especially over the last decade (2000 to 2007). The biggest decreases in the health of fish communities were in rivers in mostly pastoral (farming) or urban areas.

http://www.mfe.govt.nz/publications/water/temporal-land-cover-freshwater-fish/html/page1.html

 

 

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