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 Bill English, Abroad

Looks like you need to get the blurb yourself. Probably best to do that irrespective, actually.If David Cameron was the closest thing John Key had to a political mentor, their successors also share a whole lot in common.

Theresa May and Bill English were both propelled into the top jobs as the result of unexpected resignations, and without much in the way of credible competition from their colleagues. Neither have yet been given a mandate to govern by the electorate although – in both countries – the Labour opposition is in less than robust shape. More>>

 

Pike River: Labour Bill To Override Safety Act For Mine Entry

“Bill English has been hiding behind the legal excuse that any attempt to re-enter the mine to recover the bodies might place the mine’s owner, Solid Energy Limited, and its directors in breach of the Health and Safety at Work Act 2015." More>>

ALSO:

Gordon Campbell: On Populism And Labour 2017

For many people on the centre-left, populism is a dirty word, and a shorthand for the politics of bigotry. In this country, it has tended to be equated with the angry legions of New Zealand First. Who knew they were not just a reactionary spasm, but the wave of the future? More>>

Oxfam: 30% Of NZ Owns Less Wealth Than Our Two Richest Men

The research also reveals that the richest one per cent have 20 per cent of the wealth in New Zealand, while 90 per cent of the population owns less than half of the nation’s wealth. The research forms part of a global report released to coincide with this week’s annual meeting of political and business leaders at the World Economic Forum in Davos, Switzerland. More>>

ALSO:

Hospitals: Resident Doctors Set To Strike Again

Despite discussions between the DHBs and NZRDA over safer hours for resident doctors progressing during the last week, the strike planned for next week appears set to proceed. More>>

ALSO:

Not So Super Fund: More Burning Ethical Questions For Steven Joyce

Greens: Radio New Zealand reported this morning that the New Zealand Superfund has $77 million invested in 47 coal companies that the Norwegian Government’s Pension Fund – the largest sovereign fund in the world – has blacklisted. More>>

Activism: Greenpeace Intercepts World’s Biggest Seismic Oil Ship

Greenpeace crew have made contact with the world’s biggest seismic oil ship after travelling 50 nautical miles on two rigid-hulled inflatables off the coast of Wairarapa... Greenpeace radioed the master of the Amazon Warrior to deliver an open letter of protest signed by over 60,000 New Zealanders. More>>

ALSO:

Gordon Campbell: Why Tax Cuts In 2017 Would Be A (Proven) Bad Idea

Ever since the world fell prey to the mullahs of the free market in the 1980s, no amount of real world evidence has managed dispel one key tenet of their economic faith. Namely, the idea that if you cut income taxes and taxes on small business, a wave of individual enterprise and entrepreneurial energy will thus be unleashed, profits will rise and – hey bingo! – the tax cuts will soon be paying for themselves ... More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
More RSS  RSS
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news