Fyke netting, electric fishing, and spotlighting
were all used to assess instream fishery values
within the Parapara River, and Glen Gyle Creek (tributary), within areas
likely to be affected
by the proposed scheme.
Eight fine meshed fyke nets, baited with marmite, were set overnight.
Seven were set within
the mainstem Parapara, from 150 metres upstream of the gorge outlet down
to the confluence
with Glen Gyle Creek. Access difficulties, precluded fyke nets being set
further upstream into
the gorge. One fyke net was also set within Glen Gyle Stream.
Spotlighting was undertaken from as far up into the gorge as night-time
foot access would
allow (50 metres), down to 150 metres below the Glen Gyle Stream confluence.
100 metres of Glen Gyle Stream was also spotlighted. Less than 5% of the
habitat represented suitable shortjaw kokopu habitat due to the high gradient
nature of the area
(R. Barrier pers. obs.).
Single pass electric fishing was undertaken 1 km upstream of the gorge
outlet over an area of
around 60 m2, to detail fish species present and their relative abundance.
Electric fishing was
undertaken in this location as it represented the most suitable looking
native fish habitat
encountered within the lower 1 km of the gorge. Single pass spot electric
fishing of limited
suitable habitat available was also undertaken from this point down to
the gorge outlet, and
would have covered an additional area of 70 m2 in total. Single pass electric
fishing only was
undertaken for comparison with earlier single pass electric fishing undertaken
above the gorge
(Deans 2003). A standard Kainga 300 backpack electric fishing machine
Invertebrate sampling was also undertaken 1 km up into the gorge (site
1) at the top of the
survey reach, and also at a lower point 300 metres from the gorge outlet
(site 2). Invertebrates
were collected using 3 quantitative surber samples and 1 kicknet sample
at each of the two
sites. Two single kick net samples were also taken, one near the confluence
of Glen Gyle
Stream, and another approximately 200 metres up the Glen Gyle Stream.
samples were collected by the applicant’s hydrologist Tony Hewitt
on 09/07/04 at Richmond
Flat from the lower gradient river section immediately upstream of the
present dam and
proposed intake site, and downstream of this site below the dam within
the top of the gorge.
Invertebrate samples were processed and analysed by the Cawthron Institute.
An inflatable boat, chest waders, and rock scrambling/climbing skills
enabled the survey team
to penetrate the lower gorge. Access to the area is difficult and dangerous,
spotlighting without the benefit of overnight camping within the gorge.
Fish & Game New Zealand
Nelson Marlborough Region Sports Fish and Game Bird Management