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

 


Cockles Coming Back in Pauatahanui Inlet

Cockles Coming Back in Pauatahanui Inlet


The health of Pauatahanui Inlet is being restored, judging by the big increase in cockle numbers recorded in the latest survey by the Guardians of Pauatahanui Inlet (GOPI).

Cockle numbers are up 21% from 277 million to 336 million since the last survey in 2010 and have grown a massive 87% since 1995.

The Cockle Survey has been undertaken by GOPI every three years since 1992 and is analysed by National Institute of Water and Atmospheric Research (NIWA). GOPI will be reporting on the findings at its AGM tonight.

This 8th survey of the cockle population in the Pauatahanui Inlet arm of Porirua Harbour was carried out in December 2013.

Volunteers assisting GOPI came from Ngati Toa Rangatira, Greater Wellington Regional Council, Porirua City Council, Massey University, Conservation Volunteers and local residents.

The NIWA report on the survey confirmed our gut feeling on the day we carried out the survey that the number of cockles was larger than in any of our previous surveys, says GOPI Chairperson Tony Shaw.

“This is good for the cockles, but must also be an indication that the general ecological health of the Inlet is improving.”

He says a significant effort is going in to reducing contaminants and sediments entering the harbour, particularly with the implementation of the Porirua Harbour and Catchment Strategy and Action Plan on-going since 2012.

"The actions taken by Greater Wellington Regional Council, Porirua City Council, farmers and urban developers to drastically reduce the amount of sediment entering the Inlet are undoubtedly having a positive effect,” says Mr Shaw.

The cockles sampled ranged from 3mm to 40mm in length although some larger individuals measured up to 58mm in length. The numbers of juvenile cockles have also increased markedly from around 1.0% in 1992 to 16.2% in 2013.

Greater Wellington Regional Council Manager Biodiversity Tim Porteous says each survey has used the same design and methods.

“This has allowed us to make direct site, transect and tide level comparisons from survey to survey and cockle numbers are increasing at most of the sites sampled.”

There were some sites on the southern side of the Inlet where cockle numbers were lower than in the last survey in 2010, including at Seaview Road, Browns Bay and Duck Creek.

“At Browns Bay currents over the last decade have washed away the fine sediment leaving gravel and hard clay, mud has been accumulating at Duck Creek and the beach at Seaview Road was largely covered by sea lettuce,” Mr Porteous says.

“Excessive sea lettuce smothers the cockles and the current conditions at the other two sites are also not a good environment for them. It has to be remembered that the Inlet is dynamic environment so there has been improvement in some areas and deterioration in others, but overall the picture is very good.”

Porirua Harbour and Catchment Strategy and Action Plan Co-ordinator Keith Calder says this survey adds to the wealth of information being gathered about the harbour.

“While it is very early days in the implementation of the Harbour Strategy, it is pleasing to have an indication that we are heading in the right direction in reducing the sediment coming into the harbour.”

The full report by NIWA gives more detail and can be found at http://www.gopi.org.nz/cockle-survey-2/.


ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

 

Auckland Relocation Grants: 12 Grants Paid So Far

Since the policy took effect one month ago, 12 applicants have received the non-recoverable grant, supporting 32 people. $54,508 has been paid out, covering things like moving costs, bond, rent in advance and letting fees. More>>

ALSO:

Vaccine Funding Change: HPV Vaccines For All Children

PHARMAC has today announced changes to funded vaccines, which will benefit an extra 100,000 people... The human papillomavirus (HPV) vaccine will be available for all children and adults up to the age of 26 years, and boys will now be included in the HPV school vaccination programme. More>>

ALSO:

Gordon Campbell: On Why The Opinion Polls For Key And Trump Defy Gravity

What is going on? Donald Trump got confirmed as the Republican presidential candidate at a bizarrely chaotic political convention… and promptly received an upwards bump in the polls to where he’s now rating ahead of Hillary Clinton, for only the second time this year. More>>

Sugar: Auckland Leisure Centres Axe Unhealthy Drinks

Auckland Council is to stop selling drinks that are sweetened by sugar from vending machines at its leisure centres in a bid to try to reduce obesity and type 2 diabetes... More>>

ALSO:

Gordon Campbell: On Todd McClay’s Faulty Memory

Time and again, whenever an issue arises the initial response by government is to deny or diminish the problem – nothing to worry about here, everything’s OK, move on. Then, hang on. In line with the usual pattern, as embarrassing details emerged into daylight, the story changed. More>>

ALSO:

Labour's 'Future Of Work': Major Reform Of Careers And Apprenticeships

The next Labour Government will transform careers advice in high schools to ensure every student has a personalised career plan, Leader of the Opposition Andrew Little says. More>>

ALSO:

State Investments Management: Treasury Likes IRD, Not Education Or Corrections

The Inland Revenue Department has scored an 'A' in the first tranche of the Treasury's investor confidence rating for state agencies that manage significant Crown investments and assets, gaining greater autonomy as a result, while the Corrections and Education ministries gained a 'C' rating. More>>

ALSO:

Govt Goal: NZ To Be "Predator Free" By 2050

Prime Minister John Key has today announced the Government has adopted the goal of New Zealand becoming Predator Free by 2050... “That’s why we have adopted this goal. Our ambition is that by 2050 every single part of New Zealand will be completely free of rats, stoats and possums." More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news