title: Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand

authors: Hicks, Brendan J.

subjects: biology

abstract: The density and biomass of fish and crayfish, and the production of eels, was compared among streams in native forest, exotic forest, and pasture. Populations were estimated by multiple-pass electroshocking at 11 sites in hill-country streams in the Waikato region, North Island. Three sites were in native forest, four in exotic forest, and four in pasture. Length of stream sampled at each site was 46-94 m (41-246 m2 in area), and catchment areas up stream of the sites ranged from 0.44 to 2.01 km2. 
A total of 487 fish were caught. The species were longfinned and shortfinned eels, banded kokopu, Cran's and redfinned bullies, and common smelt. Eels were the most abundant fish in all three land-use types, and shortfinned eels were more abundant at pastoral sites (mean density 1.11 fish m-2) than longfinned eels (mean density 0.129 fish m-2). Banded kokopu were present only at forested sites. Mean fish densities were greater at pastoral sites (1.55 fish m-2) than under either native forest (0.130 fish m-2) or exotic forest (0.229 fish m-2). Mean fish biomass was also greater at pastoral sites (89.7 g m-2) than under native forest (12.8 g m-2) or exotic forest (19.3 g m-2). Longfinned eels made a greater contribution to the fish biomass at all sites than did shortfinned eels. Densities of crayfish were high (0.46-5.40 crayfish m-2), but were not significantly different between land-use types. Crayfish biomass ranged from 1.79 to 11.2 g m-2. Total eel production was greater at pastoral sites (mean 17.9 g m-2 year-1) than at forest sites (mean 2.39 g m-2 year-1).

text: Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand The density and biomass of fish and crayfish, and the production of eels, was compared among streams in native forest, exotic forest, and pasture. Populations were estimated by multiple-pass electroshocking at 11 sites in hill-country streams in the Waikato region, North Island. Three sites were in native forest, four in exotic forest, and four in pasture. Length of stream sampled at each site was 46-94 m (41-246 m2 in area), and catchment areas up stream of the sites ranged from 0.44 to 2.01 km2. 
A total of 487 fish were caught. The species were longfinned and shortfinned eels, banded kokopu, Cran's and redfinned bullies, and common smelt. Eels were the most abundant fish in all three land-use types, and shortfinned eels were more abundant at pastoral sites (mean density 1.11 fish m-2) than longfinned eels (mean density 0.129 fish m-2). Banded kokopu were present only at forested sites. Mean fish densities were greater at pastoral sites (1.55 fish m-2) than under either native forest (0.130 fish m-2) or exotic forest (0.229 fish m-2). Mean fish biomass was also greater at pastoral sites (89.7 g m-2) than under native forest (12.8 g m-2) or exotic forest (19.3 g m-2). Longfinned eels made a greater contribution to the fish biomass at all sites than did shortfinned eels. Densities of crayfish were high (0.46-5.40 crayfish m-2), but were not significantly different between land-use types. Crayfish biomass ranged from 1.79 to 11.2 g m-2. Total eel production was greater at pastoral sites (mean 17.9 g m-2 year-1) than at forest sites (mean 2.39 g m-2 year-1).

year: 1997

title: Modelling the yield curve with Orthonomalised Laguerre Polynomials: An intertemporally consistent approach with an economic interpretation

authors: Krippner, Leo

subjects: yield curve

abstract: This article provides theoretical foundations for the popular orthonormalised Laguerre polynomial (OLP) model of the yield curve, as originally introduced by Nelson and Siegel (1987). Intertemporal consistency is provided by deriving the volatility-adjusted OLP (VAO) model of the yield curve using the risk-neutral Heath, Jarrow and Morton (1992) framework, and including an allowance for term premia as noted in Duffee (2002). An economic interpretation is provided by deriving the relationship between the VAO model and the Berardi and Esposito (1999) yield curve model that is based on a generic general equilibrium model of the economy. In empirical applications using almost 50 years of United States data, the VAO model outperforms the random walk when used to forecast the yield curve out of sample, and the level of the yield curve as measured by the VAO model is shown to be cointegrated with CPI inflation, as predicted.

text: Modelling the yield curve with Orthonomalised Laguerre Polynomials: An intertemporally consistent approach with an economic interpretation This article provides theoretical foundations for the popular orthonormalised Laguerre polynomial (OLP) model of the yield curve, as originally introduced by Nelson and Siegel (1987). Intertemporal consistency is provided by deriving the volatility-adjusted OLP (VAO) model of the yield curve using the risk-neutral Heath, Jarrow and Morton (1992) framework, and including an allowance for term premia as noted in Duffee (2002). An economic interpretation is provided by deriving the relationship between the VAO model and the Berardi and Esposito (1999) yield curve model that is based on a generic general equilibrium model of the economy. In empirical applications using almost 50 years of United States data, the VAO model outperforms the random walk when used to forecast the yield curve out of sample, and the level of the yield curve as measured by the VAO model is shown to be cointegrated with CPI inflation, as predicted.

year: 2003-09

title: Housing, mental health, and homelessness: Exploring lived experiences of homelessness to identify barriers to sustainable housing for vulnerable populations

authors: Cresswell, Caitlin Grace

subjects: Homelessness

abstract: Homelessness has become a much talked about topic in Aotearoa New Zealand in 2018 and the preceding years. This thesis explores the experiences of five people who have mental illness and have lived experience of homelessness in Aotearoa New Zealand, and two staff members who work closely with people who experience both mental illness and homelessness. The theoretical frameworks that inform this thesis are narrative research, social constructionism and humanistic psychology. Particular attention was paid to using theoretical frameworks and interview methods that suited Māori (the indigenous population of Aotearoa New Zealand) due to the inequities experienced by Māori in mental health and homelessness, and the majority of participants identifying as New Zealand Māori. Participants’ narratives were gathered using semi- structured interviews. This study argues the importance of a humanistic perspective being used for research on homelessness. In contrast to traditional psychology, humanistic psychology emphasises respecting individual participants’ voice and narratives about their personal experiences of homelessness while considering the environment that influence these narratives. The participants’ narratives reflected their desire to be viewed as more than their life circumstances and illness through the sharing of their life stories. While there has been growing public awareness about mental illness, stigma still exists about mental illness which influences social narratives and how people who have mental illness understand their experiences. I argue that people who are vulnerable to homelessness, like those who experience mental illness, should have better protection from homelessness. To achieve this, I argue that structural barriers to finding, gaining and sustaining housing need to be addressed,
iii
including the design of welfare and housing services. Additionally, there needs to be recognition that the solutions to homelessness are complex and require a whole of system approach to effectively address and prevent homelessness. Recognising the complex nature of homelessness and it’s solutions will help bring a focus to establishing predominantly preventative solutions while also providing emergency housing for people in need.

text: Housing, mental health, and homelessness: Exploring lived experiences of homelessness to identify barriers to sustainable housing for vulnerable populations Homelessness has become a much talked about topic in Aotearoa New Zealand in 2018 and the preceding years. This thesis explores the experiences of five people who have mental illness and have lived experience of homelessness in Aotearoa New Zealand, and two staff members who work closely with people who experience both mental illness and homelessness. The theoretical frameworks that inform this thesis are narrative research, social constructionism and humanistic psychology. Particular attention was paid to using theoretical frameworks and interview methods that suited Māori (the indigenous population of Aotearoa New Zealand) due to the inequities experienced by Māori in mental health and homelessness, and the majority of participants identifying as New Zealand Māori. Participants’ narratives were gathered using semi- structured interviews. This study argues the importance of a humanistic perspective being used for research on homelessness. In contrast to traditional psychology, humanistic psychology emphasises respecting individual participants’ voice and narratives about their personal experiences of homelessness while considering the environment that influence these narratives. The participants’ narratives reflected their desire to be viewed as more than their life circumstances and illness through the sharing of their life stories. While there has been growing public awareness about mental illness, stigma still exists about mental illness which influences social narratives and how people who have mental illness understand their experiences. I argue that people who are vulnerable to homelessness, like those who experience mental illness, should have better protection from homelessness. To achieve this, I argue that structural barriers to finding, gaining and sustaining housing need to be addressed,
iii
including the design of welfare and housing services. Additionally, there needs to be recognition that the solutions to homelessness are complex and require a whole of system approach to effectively address and prevent homelessness. Recognising the complex nature of homelessness and it’s solutions will help bring a focus to establishing predominantly preventative solutions while also providing emergency housing for people in need.

year: 2018