title: Growth and population dynamics of crayfish Paranephrops planifrons in streams within native forest and pastoral land uses

authors: Parkyn, Stephanie M.

subjects: biology

abstract: Population dynamics of crayfish (Paranephrops planifrons White) in streams draining native forest and pastoral catchments, Waikato, New Zealand, were investigated from September 1996 to July 1998. Crayfish densities were generally greater in native forest streams because of high recruitment over summer, but varied greatly between streams in both land uses. Peak densities in summer were 9 crayfish m-2 in native forest and 6 crayfish m-2 in pasture streams, but peak biomass in summer was much greater in pasture streams. Mark-recapture data showed that crayfish, particularly juveniles, in pasture streams grew faster than in native forest streams, through both greater moult frequency and larger moult increments. Females reached reproductive size at c. 20 mm orbit-carapace length (OCL) after their first year in pasture streams, but after 2 years in native forest streams. Annual degree days >10°C appeared to explain the differences in the timing of life cycles. Estimates of annual crayfish production (range = 0.8-3.4 g dry weight m-2 year-1) were similar in both land uses, and P/B ratios were between 0.95 and 1.2. Despite deforestation and conversion to pasture, crayfish in these Waikato hill-country streams have maintained similar levels of annual production to those in native forest streams, although juvenile growth rates have increased and longevity has decreased.

text: Growth and population dynamics of crayfish Paranephrops planifrons in streams within native forest and pastoral land uses Population dynamics of crayfish (Paranephrops planifrons White) in streams draining native forest and pastoral catchments, Waikato, New Zealand, were investigated from September 1996 to July 1998. Crayfish densities were generally greater in native forest streams because of high recruitment over summer, but varied greatly between streams in both land uses. Peak densities in summer were 9 crayfish m-2 in native forest and 6 crayfish m-2 in pasture streams, but peak biomass in summer was much greater in pasture streams. Mark-recapture data showed that crayfish, particularly juveniles, in pasture streams grew faster than in native forest streams, through both greater moult frequency and larger moult increments. Females reached reproductive size at c. 20 mm orbit-carapace length (OCL) after their first year in pasture streams, but after 2 years in native forest streams. Annual degree days >10°C appeared to explain the differences in the timing of life cycles. Estimates of annual crayfish production (range = 0.8-3.4 g dry weight m-2 year-1) were similar in both land uses, and P/B ratios were between 0.95 and 1.2. Despite deforestation and conversion to pasture, crayfish in these Waikato hill-country streams have maintained similar levels of annual production to those in native forest streams, although juvenile growth rates have increased and longevity has decreased.

year: 2002-11

title: Constructive Analysis of Partial Differential Equations

authors: Wang, Michael Yuchuan

subjects: Partial Differential Equations

abstract: This thesis presents the results produced in the study of weak solutions of the Dirichlet Problem within Errett Bishop's constructive mathematics. It roughly falls into three major parts: a critical analysis of the classical approaches from a constructive point of view (Chapter 2); constructive results on the existence, stability, and maximality of weak solutions (Chapter 5); and related results on the domains discovered during the course of study on the Dirichlet Problem (Chapters 3 and 6). Chapter 1 introduces constructive mathematics, and Chapter 4 is an auxiliary one in which I give two different constructions of a cut-off function.

text: Constructive Analysis of Partial Differential Equations This thesis presents the results produced in the study of weak solutions of the Dirichlet Problem within Errett Bishop's constructive mathematics. It roughly falls into three major parts: a critical analysis of the classical approaches from a constructive point of view (Chapter 2); constructive results on the existence, stability, and maximality of weak solutions (Chapter 5); and related results on the domains discovered during the course of study on the Dirichlet Problem (Chapters 3 and 6). Chapter 1 introduces constructive mathematics, and Chapter 4 is an auxiliary one in which I give two different constructions of a cut-off function.

year: 1996

title: “It is about enabling Tino Rangatiratanga and Mana Motuhake”: An analysis of submissions on the Pae Ora (Healthy Futures) Bill 2021 endorsing a Māori health authority

authors: Edmonds, Moengaroa

subjects: Health Equity

abstract: Indigenous leadership in healthcare is one way for Indigenous peoples to exercise sovereignty over their health. In Aotearoa New Zealand, the establishment of the Māori Health Authority (MHA) was grounded in a decades-long imperative to address Māori health inequities and operationalise te Tiriti o Waitangi within the health system. However, the populist National-led coalition government formed in November 2023 included the abolishment of the MHA in their first 100-day plan and eventually disestablished it in February 2024. This study analysed 155 public group submissions on the Pae Ora (Healthy Futures) Bill made in 2021 and representing health professionals, iwi, hapū, and community groups. Core themes endorsing the MHA as a statutory entity included honouring te Tiriti, advocating for Māori-led solutions to health inequities, decolonising health systems, and affirming Indigenous rights. The political decision to remove the MHA is antithetical to the explicit endorsement statements made by an overwhelming majority of group submitters with expertise in health organisational structures and healthcare provision. Our study has implications for future local and international research in documenting counter-narratives for Indigenous struggles in health systems.

text: “It is about enabling Tino Rangatiratanga and Mana Motuhake”: An analysis of submissions on the Pae Ora (Healthy Futures) Bill 2021 endorsing a Māori health authority Indigenous leadership in healthcare is one way for Indigenous peoples to exercise sovereignty over their health. In Aotearoa New Zealand, the establishment of the Māori Health Authority (MHA) was grounded in a decades-long imperative to address Māori health inequities and operationalise te Tiriti o Waitangi within the health system. However, the populist National-led coalition government formed in November 2023 included the abolishment of the MHA in their first 100-day plan and eventually disestablished it in February 2024. This study analysed 155 public group submissions on the Pae Ora (Healthy Futures) Bill made in 2021 and representing health professionals, iwi, hapū, and community groups. Core themes endorsing the MHA as a statutory entity included honouring te Tiriti, advocating for Māori-led solutions to health inequities, decolonising health systems, and affirming Indigenous rights. The political decision to remove the MHA is antithetical to the explicit endorsement statements made by an overwhelming majority of group submitters with expertise in health organisational structures and healthcare provision. Our study has implications for future local and international research in documenting counter-narratives for Indigenous struggles in health systems.

year: 2025