Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Improving lake good news for fisheries

Improving lake good news for fisheries


Lake Rotoiti water quality is the best it has been in decades and this can only be good for fisheries say experts from Fish & Game, NIWA and Bay of Plenty Regional Council.

Regional Council General Manager Natural Resource Operations, Warwick Murray, said water quality improvements were a result of interventions through the Rotorua Te Arawa Lakes programme and that was great news for the community, the Crown and the programme.

“The Ohau diversion wall has been extremely successful in improving water quality. This, coupled with sewage reticulation, has meant we have reached the water quality target for the lake,” Mr Murray said.

“The wall was constructed in 2008 and diverts nutrient rich waters from Lake Rotorua entering Lake Rototi. This is allowing us to see improvements in Lake Rotoiti now and gives us the time needed to make the sustainable changes necessary to secure long term water quality improvements,” he said.

“At the same time we must make sure our interventions don’t have any adverse effects on lake ecology or fisheries and we have a fish monitoring programme in place to monitor the long-term effects of the diversion wall on smelt, trout, koura and kakahi,” Mr Murray said.

The Regional Council leads the fisheries research and monitoring with assistance from NIWA, Fish & Game and Ian Kusabs & Associates. Data has been collected and reviewed for the last seven years, including a period of two years prior to the wall’s construction, by an independent panel of New Zealand fishery experts.

“The latest results from the Fish Monitoring Programme have been very positive,” he said

NIWA Principal Scientist Freshwater Fish Group Manager Dr David Rowe said the results of the smelt monitoring programme in 2012/13 indicated several runs had occurred in the channel over spring.

“The results confirm that strong upstream migrations of both adult and juvenile smelt are occurring with the diversion wall in place.”

Smelt are the main food source for trout and NIWA monitors their channel runs using traps and combining the data with morning and evening observations of smelt movements and shag and gull numbers.

Dr Rowe said larval smelt in Lake Rotoiti also appeared to be increasing as lake water clarity improved.

Eastern Fish & Game Manager Rob Pitkethley said the start of the current trout season was the best on record since surveys began three seasons before the wall went in and this spring’s fishing was a large improvement on the past three seasons.

“Schools of smelt were noted running through the channel prior to the opening in October, and the runs of smelt have lasted through November, which has not been seen for a number of seasons,” Mr Pitkethley said.

“Trout caught in the channel have been in better condition compared to the last few seasons. Recent highly productive smelt spawning from Lake Rotoiti appears to have translated through the food chain into good trout growth, in both lakes Rotoiti and Rotorua.

“Monitoring of the Lake Rotorua and Rotoiti fisheries has shown fluctuations in trout growth and condition, and some recent improvements. The absence of algal blooms and improvements in water quality on both lakes should be beneficial for the longer term health of these fisheries,” said Mr Pitkethley.

Ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

 

Breed Laws Don’t Work: Vets On New National Dog Control Plan

It is pleasing therefore to see Louise Upston Associate Minister for Local Government calling for a comprehensive solution... However, relying on breed specific laws to manage dog aggression will not work. More>>

ALSO:

Not Waiting On Select Committee: Green Party Releases Medically-Assisted Dying Policy

“Adults with a terminal illness should have the right to choose a medically assisted death,” Green Party health spokesperson Kevin Hague said. “The Green Party does not support extending assisted dying to people who aren't terminally ill because we can’t be confident that this won't further marginalise the lives of people with disabilities." More>>

ALSO:

General Election Review: Changes To Electoral Act Introduced

More effective systems in polling places and earlier counting of advanced votes are on their way through proposed changes to our electoral laws, Justice Minister Amy Adams says. More>>

Gordon Campbell: On Our Posturing At The UN

In New York, Key basically took an old May 2 Washington Post article written by Barack Obama, recycled it back to the Americans, and still scored headlines here at home… We’ve had a double serving of this kind of comfort food. More>>

ALSO:

Treaty Settlements: Bills Delayed As NZ First Pulls Support

Ngāruahine, Te Atiawa and Taranaki are reeling today as they learnt that the third and final readings of each Iwi’s Historical Treaty Settlement Bills scheduled for this Friday, have been put in jeopardy by the actions of NZ First. More>>

ALSO:

Gordon Campbell: On The Damage De-Regulation Is Doing To Fisheries And Education, Plus Kate Tempest

Our faith in the benign workings of the market – and of the light-handed regulation that goes with it – has had a body count. Back in 1992, the free market friendly Health Safety and Employment Act gutted the labour inspectorate and turned forestry, mining and other workplace sites into death traps, long before the Pike River disaster. More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news