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

 

Gordon Campbell: On The IOC’s Treatment Of Russian Sport, And Lone Wolf Terrorism

A blanket ban on Russian athletes would also have exposed the IOC to criticism that its treatment of Russia would have been marked contrast to its treatment say, of the track and field team from Kenya – a country about which the IOC has very similar doping concerns. More>>

ALSO:

Sounds Like A Plan: Auckland Council Receives Unitary Plan Recommendations

A key milestone in New Zealand planning history was reached today when the Independent Hearings Panel delivered the reports containing its recommendations on the Proposed Auckland Unitary Plan. More>>

ALSO:

National Park Expansion: Forests And Coast Of Kahurangi Protected

Five parcels of high value land totalling more than 890 hectares have been formally gazetted as part of the National Park. More>>

ALSO:

PPP Go-Ahead: SkyPath Gets Unanimous Support

Auckland’s SkyPath project has been given the go-ahead to be delivered through a public private partnership, after a unanimous decision at today’s Finance and Performance Committee. More>>

ALSO:

Gordon Campbell: On The Reserve Bank, The UN Shortlist, And Trump

Can there really be there any link between the US presidential elections and yesterday’s RBNZ signals on interest rates and the NZ dollar? Well, maybe. And it would be this: the improving US economy is reportedly putting a tailwind behind the US dollar, and rendering the actions of our Reserve Bank virtually irrelevant. More>>

ALSO:

Gordon Campbell: On What John Key Should Be Asking Joe Biden

No doubt, US Vice-President Joe Biden will be updating Prime Minister John Key on the chances of a TPP vote taking place in the ‘ lame duck’ session of Congress that’s held between the November’s election and the inauguration of a new President in January. More>>

ALSO:

Make NZ Make Again: Greens Will Establish A Minister For Manufacturing

The Green Party announced today that it will establish a Minister for Manufacturing in Cabinet, to better represent the interests of manufacturers and ensure they thrive. The Minister will be inside Cabinet and have responsibility for the long-term interests of the manufacturing sector. More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news