title: The corophiid amphipods of Tauranga Harbour, New Zealand: evidence of an Australian crustacean invader

authors: Stevens, Mark I.

subjects: Amphipoda

abstract: Using morphological and molecular techniques we examined the corophiid amphipods in the Waimapu Estuary, Tauranga Harbour in the North Island of New Zealand. Based on morphology we identified two New Zealand endemic species, Paracorophium lucasi and P. excavatum, as well as P. brisbanensis, previously recorded only from the eastern coast of Australia and Corophium sp. which has not been previously recorded from New Zealand. Allozyme analyses confirmed the morphological diagnoses of three distinct species within Paracorophium and of the single Corophium species. The presence of reproductive females and juvenile P. brisbanensis suggests a viable, breeding population in Tauranga Harbour. We conclude that the species is likely to have been introduced to New Zealand waters via shipping activities (e.g., ballast water). The possibility that P. brisbanensis may now spread to other New Zealand ports as well as the consequences of this introduction for other New Zealand taxa need to be urgently examined.

text: The corophiid amphipods of Tauranga Harbour, New Zealand: evidence of an Australian crustacean invader Using morphological and molecular techniques we examined the corophiid amphipods in the Waimapu Estuary, Tauranga Harbour in the North Island of New Zealand. Based on morphology we identified two New Zealand endemic species, Paracorophium lucasi and P. excavatum, as well as P. brisbanensis, previously recorded only from the eastern coast of Australia and Corophium sp. which has not been previously recorded from New Zealand. Allozyme analyses confirmed the morphological diagnoses of three distinct species within Paracorophium and of the single Corophium species. The presence of reproductive females and juvenile P. brisbanensis suggests a viable, breeding population in Tauranga Harbour. We conclude that the species is likely to have been introduced to New Zealand waters via shipping activities (e.g., ballast water). The possibility that P. brisbanensis may now spread to other New Zealand ports as well as the consequences of this introduction for other New Zealand taxa need to be urgently examined.

year: 2002

title: Self-Mixing Diode Laser Interferometry

authors: Shrestha, Pawan Kumar

subjects: Self-mixing

abstract: Self-mixing interferometry in a laser diode is a very powerful tool in measurement science. The Self-mixing interferometer is a very robust and low cost interferometer with extreme simplicity in alignment and setup. In this thesis, a self-mixing interferometer is analysed and developed. The measurements of the self-mixing interferometer are verified using a Michelson interferometer. It is then followed by the signal processing of the detected signal. Three different methods are developed to retrieve the movement of the target. Results obtained by applying these methods to different experimental data sets are presented.
In the later part of the thesis, a phase locked self-mixing interferometer is developed. This slightly modified interferometer follows the target movement. As a result no additional circuitry or signal processing is necessary for the recovery of the target movement. Phase locked interferometer developed in this thesis was able to measure down to 1 nm of vibration. It is then followed by a novel method to detect cracks in eggshells using the phase locked vibrometer. The proposed method is tested and proved to be capable of differentiating between the intact and cracked eggs.

text: Self-Mixing Diode Laser Interferometry Self-mixing interferometry in a laser diode is a very powerful tool in measurement science. The Self-mixing interferometer is a very robust and low cost interferometer with extreme simplicity in alignment and setup. In this thesis, a self-mixing interferometer is analysed and developed. The measurements of the self-mixing interferometer are verified using a Michelson interferometer. It is then followed by the signal processing of the detected signal. Three different methods are developed to retrieve the movement of the target. Results obtained by applying these methods to different experimental data sets are presented.
In the later part of the thesis, a phase locked self-mixing interferometer is developed. This slightly modified interferometer follows the target movement. As a result no additional circuitry or signal processing is necessary for the recovery of the target movement. Phase locked interferometer developed in this thesis was able to measure down to 1 nm of vibration. It is then followed by a novel method to detect cracks in eggshells using the phase locked vibrometer. The proposed method is tested and proved to be capable of differentiating between the intact and cracked eggs.

year: 2010

title: Level 2 Māori medium programmes: What are the perceptions of parents and students on this form of education?

authors: Hill, Richard Kenneth

subjects: Māori medium

abstract: Māori medium education provides a range of options for families wishing to educate their children through the indigenous language of Aotearoa New Zealand. Level 2 programmes with 51–80% Māori language instruction, can play an important role in supporting students and their Māori language development, yet little is known about these programmes. This project explored the experiences of whānau (families) and students of level 2 Māori medium programmes to gauge the contribution they make to the education of students. It found that this form of education attracts whānau with wide ranging aims and expectations, but offers highly satisfactory educational options for them. However, there are some tensions, particularly in regard to the part they play in lifting students’ Māori language skills. Ensuring graduates of level 2 programmes have a pathway to learn the Māori language beyond primary school was also a cause for concern.

text: Level 2 Māori medium programmes: What are the perceptions of parents and students on this form of education? Māori medium education provides a range of options for families wishing to educate their children through the indigenous language of Aotearoa New Zealand. Level 2 programmes with 51–80% Māori language instruction, can play an important role in supporting students and their Māori language development, yet little is known about these programmes. This project explored the experiences of whānau (families) and students of level 2 Māori medium programmes to gauge the contribution they make to the education of students. It found that this form of education attracts whānau with wide ranging aims and expectations, but offers highly satisfactory educational options for them. However, there are some tensions, particularly in regard to the part they play in lifting students’ Māori language skills. Ensuring graduates of level 2 programmes have a pathway to learn the Māori language beyond primary school was also a cause for concern.

year: 2017