Eels and carp killed by acidic wa­ter in creek

Auckland City Harbour News - - NEWS - By EMMA WHITTAKER

An in­ves­ti­ga­tion is un­der way into the deaths of eels in a sub­ur­ban wa­ter­way.

A num­ber of dead eels and some carp were found at Oak­ley Creek, near to the Water­view Con­nec­tion con­struc­tion site, on March 10.

The deaths were caused by a sec­tion of the creek be­com­ing acidic, an Auck­land Coun­cil spokesper­son says.

Two mil­lion litres of clean wa­ter was pumped into the creek over a day to re­store the nat­u­ral pH lev­els.

Con­tin­ued mon­i­tor­ing shows the wa­ter is safe.

But Al­bert-Eden-Roskill coun­cil­lor Cathy Casey is con­cerned that the pub­lic were not told about the prob­lem.

She dis­cov­ered 14 dead eels while walk­ing her dogs there last Wed­nes­day.

‘‘By the end [of the walk] I was ter­ri­fied.

‘‘If eels die some­thing ter­ri­ble has hap­pened, they’re one of the most re­silient species. I’m sure ev­ery­thing has been done to the let­ter, but the pub­lic has a right to know.

‘‘I was fright­ened when my dogs tried to eat an eel that could have been poi­soned.

‘‘When some­thing goes wrong with the en­vi­ron­ment there is a great deal of con­cern.’’

The Well Con­nected Al­liance, which is work­ing on the Water­view con­nec­tion, says it has in­formed its com­mu­nity li­ai­son group and the Friends of Oak­ley Creek group about the eels.

The acid­ity can likely be at­trib­uted to warm dry weather and low wa­ter flows across Auck­land in the days prior, NZ Trans­port Agency re­gional high­way man­ager Tommy Parker says.

A num­ber of pos­si­ble causes have been looked into so far.

Equip­ment on the con­struc­tion site was tested and has been ruled out as the cause, he says.

A con­trolled dis­charge of stormwa­ter into the creek from a treat­ment pond to pre­pare for Cy­clone Lusi which hit over the week­end has also been ruled out.

The coun­cil is ask­ing peo­ple to call 301 0101 if they come across sim­i­lar prob­lems at Oak­ley Creek.

Some­thing fishy: A dead eel found on the bank of Oak­ley Creek af­ter the pH level of the wa­ter sud­denly dropped.

Newspapers in English

Newspapers from New Zealand

© PressReader. All rights reserved.