title: The Bendigo battery: the last Waiorongomai battery

authors: Hart, Philip

abstract: The Bendigo Battery was erected to treat ore from the mine of the same name, which was worked on a small scale, with the usual reportedly encouraging prospects, during the early twentieth century. Its site had been selected for a batter in previous decades but never used. The Bendigo Company was, as usual, under-capitalized, but some of its shareholders had experience of mining and must have optimistically expected successful share trading if not mining. But it struggled to obtain calls and meet its debts.
The company’s small-scale mining was sufficiently encouraging for it to commence work on its battery in 1909. Progress was very slow, handicapped by legal squabbles, and it did not commence operations until late 1911. Full details are provided of the machinery and processes used. It quickly proved to be unprofitable and was abandoned in 1913, for which the poverty of the ore rather than the treatment process was most to blame. 
From 1914 onwards, others took over the ground, doing some more prospecting and modifying the treatment, notably by introducing the oil flotation process. After the late 1920s it was no longer used, although its last owner still hoped to make more improvements. After he died, the machinery was stolen.

text: The Bendigo battery: the last Waiorongomai battery The Bendigo Battery was erected to treat ore from the mine of the same name, which was worked on a small scale, with the usual reportedly encouraging prospects, during the early twentieth century. Its site had been selected for a batter in previous decades but never used. The Bendigo Company was, as usual, under-capitalized, but some of its shareholders had experience of mining and must have optimistically expected successful share trading if not mining. But it struggled to obtain calls and meet its debts.
The company’s small-scale mining was sufficiently encouraging for it to commence work on its battery in 1909. Progress was very slow, handicapped by legal squabbles, and it did not commence operations until late 1911. Full details are provided of the machinery and processes used. It quickly proved to be unprofitable and was abandoned in 1913, for which the poverty of the ore rather than the treatment process was most to blame. 
From 1914 onwards, others took over the ground, doing some more prospecting and modifying the treatment, notably by introducing the oil flotation process. After the late 1920s it was no longer used, although its last owner still hoped to make more improvements. After he died, the machinery was stolen.

year: 2016

title: Statistical representations of the housing problem in briefings to incoming ministers, 2008–2020: The politics of housing numbers

authors: Barrett, Patrick

abstract: An interpretive policy studies perspective on what is understood to be the ‘facts’ about the housing problem in New Zealand has potential to uncover the way statistical representations of problems are embedded in larger normative narratives, and the consequential implications for housing policy and governance. This paper analyses such representations as they are evident in policy briefings to incoming Ministers of Housing between 2008 and 2020 by Housing New Zealand (HNZ) and its successor Kāinga Ora, and the way these reflect and reinforce a neoliberal political rationality and an agenda to residualise and marketise state housing support. The briefings represent authoritative accounts by a key bureaucratic advisory agency of the significant issues and priorities in the housing portfolio. The period prior to 2017 saw the emergence of new articulations of housing problems relating to affordability, declining rates of home ownership, an increasing rental population, and increasing homelessness. In the briefings to ministers, these problems were routinely framed as issues of supply and demand and market adjustment, and this has continued following the change of government in 2017. The focus of the paper is on identifying statistical representations within the discursive context that give weight to particular policy choices.

text: Statistical representations of the housing problem in briefings to incoming ministers, 2008–2020: The politics of housing numbers An interpretive policy studies perspective on what is understood to be the ‘facts’ about the housing problem in New Zealand has potential to uncover the way statistical representations of problems are embedded in larger normative narratives, and the consequential implications for housing policy and governance. This paper analyses such representations as they are evident in policy briefings to incoming Ministers of Housing between 2008 and 2020 by Housing New Zealand (HNZ) and its successor Kāinga Ora, and the way these reflect and reinforce a neoliberal political rationality and an agenda to residualise and marketise state housing support. The briefings represent authoritative accounts by a key bureaucratic advisory agency of the significant issues and priorities in the housing portfolio. The period prior to 2017 saw the emergence of new articulations of housing problems relating to affordability, declining rates of home ownership, an increasing rental population, and increasing homelessness. In the briefings to ministers, these problems were routinely framed as issues of supply and demand and market adjustment, and this has continued following the change of government in 2017. The focus of the paper is on identifying statistical representations within the discursive context that give weight to particular policy choices.

year: 2021

title: Boat electrofishing survey of fish abundance in the Ohau Channel, Rotorua, in 2017

authors: Hicks, Brendan J.

abstract: The aim of the survey was to provide on-going monitoring of the fish communities and abundance by boat electrofishing in the Ohau Channel, especially fish species that are taonga to Maori (tuna, or eels, morihana, or goldfish, and kōura, or freshwater crayfish). In the current study, we present the findings from the eleventh year of sampling (2017) and a summary of previous surveys.
We used the University of Waikato’s 4.5 m-long, aluminium-hulled electrofishing boat to catch a total of 1,110 fish and 3 kōura (18.2 kg in total) from 11 sites on 5 December 2017. The sites comprised 2,909 lineal m and 11,636 m2 in area. Kōura (freshwater crayfish) and 6 fish species were present, with common bully the most abundant species (up to 29.6 fish 100 m⁻² at the site 8, edge habitat). Goldfish (up to 14.2 100 m⁻²) was the next most abundant species, with most goldfish at sites 8 and 11 in and around the side channel. Common smelt were next the most abundant species (up to 11.4 fish 100 m⁻²). Mean density of bullies (7.8 fish 100 m⁻²) was much higher than for smelt (1.69 fish 100 m⁻²). Kōura had a patchy distribution with only 3 individuals were caught at two sites.
Comparing catches over the 11 years of sampling, the mean abundance of common bullies in 2017 was consistent with densities in most post-wall years (after 2007), but lower than in 2007 before wall closure (Newman-Keuls multiple range test, P = 0.034). The cause of fluctuating bully abundance is not known, and was not accounted for by changes in water clarity expressed as black disc distance (BDD), water temperature, or water conductivity. Poor water clarity can reduce the efficiency of electrofishing, but low BDD did not correspond with low common bully densities. In 2017, smelt abundance had recovered somewhat from the low catches from 2014 to 2016.
Goldfish biomass increased initially (2009-2010) because of targeted fishing in the side channel (site 11), which has dense macrophytes and offers good habitat for goldfish with no flow. However, the continued rise in goldfish density from 2012 on suggests a real increase in goldfish numbers. In contrast to most previous years, no eels were caught in 2017.
Analysis of fish densities before and after wall closure is hampered by the single data point before closure. However, we now have 10 years of post-wall data, and comparisons of means and standard deviations suggest that the number of bullies have been lower since 2008 with the exception of 2015, when bully densities were the same as 2007, i.e., before wall closure. The large number of small juvenile bullies (<30 mm) suggests that recruitment is taking place in the channel, so fluctuating bully abundance is likely to be controlled by factors other than wall closure.

text: Boat electrofishing survey of fish abundance in the Ohau Channel, Rotorua, in 2017 The aim of the survey was to provide on-going monitoring of the fish communities and abundance by boat electrofishing in the Ohau Channel, especially fish species that are taonga to Maori (tuna, or eels, morihana, or goldfish, and kōura, or freshwater crayfish). In the current study, we present the findings from the eleventh year of sampling (2017) and a summary of previous surveys.
We used the University of Waikato’s 4.5 m-long, aluminium-hulled electrofishing boat to catch a total of 1,110 fish and 3 kōura (18.2 kg in total) from 11 sites on 5 December 2017. The sites comprised 2,909 lineal m and 11,636 m2 in area. Kōura (freshwater crayfish) and 6 fish species were present, with common bully the most abundant species (up to 29.6 fish 100 m⁻² at the site 8, edge habitat). Goldfish (up to 14.2 100 m⁻²) was the next most abundant species, with most goldfish at sites 8 and 11 in and around the side channel. Common smelt were next the most abundant species (up to 11.4 fish 100 m⁻²). Mean density of bullies (7.8 fish 100 m⁻²) was much higher than for smelt (1.69 fish 100 m⁻²). Kōura had a patchy distribution with only 3 individuals were caught at two sites.
Comparing catches over the 11 years of sampling, the mean abundance of common bullies in 2017 was consistent with densities in most post-wall years (after 2007), but lower than in 2007 before wall closure (Newman-Keuls multiple range test, P = 0.034). The cause of fluctuating bully abundance is not known, and was not accounted for by changes in water clarity expressed as black disc distance (BDD), water temperature, or water conductivity. Poor water clarity can reduce the efficiency of electrofishing, but low BDD did not correspond with low common bully densities. In 2017, smelt abundance had recovered somewhat from the low catches from 2014 to 2016.
Goldfish biomass increased initially (2009-2010) because of targeted fishing in the side channel (site 11), which has dense macrophytes and offers good habitat for goldfish with no flow. However, the continued rise in goldfish density from 2012 on suggests a real increase in goldfish numbers. In contrast to most previous years, no eels were caught in 2017.
Analysis of fish densities before and after wall closure is hampered by the single data point before closure. However, we now have 10 years of post-wall data, and comparisons of means and standard deviations suggest that the number of bullies have been lower since 2008 with the exception of 2015, when bully densities were the same as 2007, i.e., before wall closure. The large number of small juvenile bullies (<30 mm) suggests that recruitment is taking place in the channel, so fluctuating bully abundance is likely to be controlled by factors other than wall closure.

year: 2018