title: The Diet and Nutritional Ecology of the Auckland Tree Wētā Hemideina thoracica

authors: Brown, Matthew

subjects: Wētā

abstract: Insects are the main consumers of primary production in many terrestrial ecosystems, they are involved in the upwards migration of energy to higher trophic levels, and are often extremely important in structuring their ecosystems. Despite the many important ways that insects influence their ecosystems, many of the most basic aspects of the functional ecology of many groups of insects have not been investigated, and a great deal remains to be learned about what roles they play in the structure and functioning of their ecosystems. This study focuses on the Auckland tree wētā Hemideina thoracica (Orthoptera: Anostostomatidae, White, 1842), the most widespread species of tree wētā in the North Island of New Zealand, and one of the least studied species in the genus Hemideina. 
Faecal fragment analysis revealed that the diet of a population of Hemideina thoracica from a mixed podocarp/broadleaf forest was composed primarily of the leaves, fruits, and seeds, of the native plants Prumnopitys taxifolia, Podocarpus totara, Dacrycarpus dacrydioides,  Kunzia ericoides,  Melicytus sp., Pennantia corymbosa, and Coprosma rotundifolia, but the consumption of other invertebrates was also common, and formed a smaller component of the overall diet. Hemideina thoracica were also shown to feed selectively while foraging. It was determined that some plants were eaten readily by the wētā when encountered, while other plants that were equally abundant were either not consumed, or were consumed far less than would be predicted by their availability. Performing a solvent extraction, using hexane, revealed that the concentration of lipids and oils in the leaves of preferred plant species was higher than in the leaves of non-preferred species, and Hemideina thoracica may preferentially consume plants that have high lipid concentrations in their leaves. It also appeared probable that they forage on the forest floor more frequently than has been previously recognised. 
	A nutritional analysis performed in captivity revealed that H. thoracica are capable of balancing their consumption of the macronutrients protein and carbohydrates to construct an optimal diet from one or more sub-optimal sources, and strongly regulate their consumption of protein. When presented with the opportunity to construct their own diet, they consumed significantly more carbohydrates than protein, and constructed a diet with a mean protein to carbohydrate ratio of 27:73. They digested carbohydrates more efficiently than protein, but converted the protein that they consumed into biomass with a very high level of conversion efficiency. These results supported the results of the fragment analysis by demonstrating that the natural, optimal diet of H. thoracica is most likely composed of carbohydrate rich foods, but they may also be naturally omnivorous, as they utilise protein very efficiently. 
	The third, and final experiment, investigated whether H. thoracica feed on fruit in a manner that may facilitate seed dispersal for native plants in the wild. This experiment involved feeding fruit from three different native plants, Coprosma repens, Cordyline australis, and Fuchsia procumbens to a group of 40 H. thoracica, and revealed that H. thoracica frequently consume the flesh of the berry from around the seed, without ingesting the seeds themselves. When the seeds were consumed, 100 % of them were destroyed by the wētās digestive process, even in the case of very small and numerous seeds, like those of F. procumbens. It is therefore highly unlikely that H. thoracica is a seed dispersing plant-mutualist, as the seeds are either left where the fruit had fallen, or are destroyed. 
	The combined results of these studies demonstrated that Hemideina thoracica is an omnivorous polyphage, and their wild diet is composed primarily of leaves, fruits, and seeds, and the concentration of lipids and oils in the leaves appears to be an important cue in determining the palatability of different species. They are also naturally omnivorous, and protein derived from eating other insects is a common component of their overall diet They have a well developed ability to balance their consumption of protein and carbohydrates, and self-select a carbohydrate rich diet in captivity. It is also extremely unlikely that that H. thoracica act as seed dispersers for native, fruit producing plants.

text: The Diet and Nutritional Ecology of the Auckland Tree Wētā Hemideina thoracica Insects are the main consumers of primary production in many terrestrial ecosystems, they are involved in the upwards migration of energy to higher trophic levels, and are often extremely important in structuring their ecosystems. Despite the many important ways that insects influence their ecosystems, many of the most basic aspects of the functional ecology of many groups of insects have not been investigated, and a great deal remains to be learned about what roles they play in the structure and functioning of their ecosystems. This study focuses on the Auckland tree wētā Hemideina thoracica (Orthoptera: Anostostomatidae, White, 1842), the most widespread species of tree wētā in the North Island of New Zealand, and one of the least studied species in the genus Hemideina. 
Faecal fragment analysis revealed that the diet of a population of Hemideina thoracica from a mixed podocarp/broadleaf forest was composed primarily of the leaves, fruits, and seeds, of the native plants Prumnopitys taxifolia, Podocarpus totara, Dacrycarpus dacrydioides,  Kunzia ericoides,  Melicytus sp., Pennantia corymbosa, and Coprosma rotundifolia, but the consumption of other invertebrates was also common, and formed a smaller component of the overall diet. Hemideina thoracica were also shown to feed selectively while foraging. It was determined that some plants were eaten readily by the wētā when encountered, while other plants that were equally abundant were either not consumed, or were consumed far less than would be predicted by their availability. Performing a solvent extraction, using hexane, revealed that the concentration of lipids and oils in the leaves of preferred plant species was higher than in the leaves of non-preferred species, and Hemideina thoracica may preferentially consume plants that have high lipid concentrations in their leaves. It also appeared probable that they forage on the forest floor more frequently than has been previously recognised. 
	A nutritional analysis performed in captivity revealed that H. thoracica are capable of balancing their consumption of the macronutrients protein and carbohydrates to construct an optimal diet from one or more sub-optimal sources, and strongly regulate their consumption of protein. When presented with the opportunity to construct their own diet, they consumed significantly more carbohydrates than protein, and constructed a diet with a mean protein to carbohydrate ratio of 27:73. They digested carbohydrates more efficiently than protein, but converted the protein that they consumed into biomass with a very high level of conversion efficiency. These results supported the results of the fragment analysis by demonstrating that the natural, optimal diet of H. thoracica is most likely composed of carbohydrate rich foods, but they may also be naturally omnivorous, as they utilise protein very efficiently. 
	The third, and final experiment, investigated whether H. thoracica feed on fruit in a manner that may facilitate seed dispersal for native plants in the wild. This experiment involved feeding fruit from three different native plants, Coprosma repens, Cordyline australis, and Fuchsia procumbens to a group of 40 H. thoracica, and revealed that H. thoracica frequently consume the flesh of the berry from around the seed, without ingesting the seeds themselves. When the seeds were consumed, 100 % of them were destroyed by the wētās digestive process, even in the case of very small and numerous seeds, like those of F. procumbens. It is therefore highly unlikely that H. thoracica is a seed dispersing plant-mutualist, as the seeds are either left where the fruit had fallen, or are destroyed. 
	The combined results of these studies demonstrated that Hemideina thoracica is an omnivorous polyphage, and their wild diet is composed primarily of leaves, fruits, and seeds, and the concentration of lipids and oils in the leaves appears to be an important cue in determining the palatability of different species. They are also naturally omnivorous, and protein derived from eating other insects is a common component of their overall diet They have a well developed ability to balance their consumption of protein and carbohydrates, and self-select a carbohydrate rich diet in captivity. It is also extremely unlikely that that H. thoracica act as seed dispersers for native, fruit producing plants.

year: 2013

title: Entrepreneurship as worship: A Malay Muslim perspective

authors: Sidek, Farhana

abstract: While Islam is the second largest religion in the world with 1.6 billion Muslims, there are variations in the interpretations of that law (i.e. Sharia).  This diversity and variation may hold the key in explaining the different behaviours among Muslim entrepreneurs because of their views on the concept of work as worship. In this study, we examine how Malay entrepreneurs are guided in their sourcing and shaping of entrepreneurial opportunities through Shafii practice. Our contributions include identifying five central values that guided the participant's sourcing of opportunities: Fardhu Kifayah (communal obligation), Wasatiyyah (balanced), Dakwah (the call of joining the good and forbidding the bad), Amanah (trust), and Barakah (blessings). We also contribute to the entrepreneurship literature by demonstrating how these macro-level values of worship gave the entrepreneurs confidence in creating their new ventures.

text: Entrepreneurship as worship: A Malay Muslim perspective While Islam is the second largest religion in the world with 1.6 billion Muslims, there are variations in the interpretations of that law (i.e. Sharia).  This diversity and variation may hold the key in explaining the different behaviours among Muslim entrepreneurs because of their views on the concept of work as worship. In this study, we examine how Malay entrepreneurs are guided in their sourcing and shaping of entrepreneurial opportunities through Shafii practice. Our contributions include identifying five central values that guided the participant's sourcing of opportunities: Fardhu Kifayah (communal obligation), Wasatiyyah (balanced), Dakwah (the call of joining the good and forbidding the bad), Amanah (trust), and Barakah (blessings). We also contribute to the entrepreneurship literature by demonstrating how these macro-level values of worship gave the entrepreneurs confidence in creating their new ventures.

year: 2018

title: Māori whānau experiences of a neonatal intensive care unit: Waikato hospital

authors: Thompson, Keri

subjects: Maori whanau narratives

abstract: This thesis topic emerged from my personal experience of having a premature baby in the Neonatal Intensive Care Unit (NICU) at Waikato hospital.  My whānau and I felt like aliens; culturally inept, and totally alone during our time in the NICU.  It was not until I spoke to other Māori mothers that I realised our stories were similar.   

I sought to understand how other Māori whānau members made sense of their own experiences, how they coped/adjusted to the experience of having a premature baby in an NICU and at home, and the sources of support they utilised. This study did not seek to delineate parents' experiences but attempted to allow whānau members to share their stories and explore their experiences of having a premature or special-care baby in an NICU.

The event of childbirth and the placing of a natural event into a pathological illness model through necessity has repercussions for the ways in which women experience and make sense of the event.  Knowing this, six whānau stories were collected comprising of four individual interviews with the mothers and two whānau hui (focus groups).  My use of a narrative methodology and kaupapa Māori approach enabled all the participants the opportunity to share their stories on how they make sense of their own experiences without the frame of pathological illness. 

The findings present each whānau story autonomously, to highlight the key events that   occur once the birth of a premature/special-care infant is admitted into an NICU. The participants' narratives followed their transitions through an NICU and return home. The narrative analysis and discussion confirmed that this research had been successful in creating a space for the mothers and their whānau members to share their stories.  The discussion combined their narratives to reveal that the effective coping strategies did not remove the sources of stress but rather lessened the impact of the stresses.  In situations where sources of stress were unable to be removed or reduced, participants perceptions of ineffective coping translated into narratives of negative perceptions of the NICU, and birthing experience. 

The importance of positive relationships within an NICU, and in particular, the role of the nurse as a key facilitator, highlighted that efficacious communication resulted in positive experiences for Māori whānau.  Whānau support was identified as one of the most important coping strategies for mothers in the NICU.  Those participants who were encouraged to maintain connections with whānau members reported more positive experiences overall.

Three levels of implications were identified in this research. Firstly, that the participants'narratives provided a range of coping strategies for future Māori parents and their whānau who enter an NICU.  Secondly, there are implications for NICU policy, and best practice particularly when supporting Māori in an NICU environment.  Lastly, the narratives provided meaningful insights that contribute to gaps in local, national, and international literature.  Overall, I realised that just like me, these mothers, and other whānau members, constructed narratives that are meaningful accounts to be shared with others.

text: Māori whānau experiences of a neonatal intensive care unit: Waikato hospital This thesis topic emerged from my personal experience of having a premature baby in the Neonatal Intensive Care Unit (NICU) at Waikato hospital.  My whānau and I felt like aliens; culturally inept, and totally alone during our time in the NICU.  It was not until I spoke to other Māori mothers that I realised our stories were similar.   

I sought to understand how other Māori whānau members made sense of their own experiences, how they coped/adjusted to the experience of having a premature baby in an NICU and at home, and the sources of support they utilised. This study did not seek to delineate parents' experiences but attempted to allow whānau members to share their stories and explore their experiences of having a premature or special-care baby in an NICU.

The event of childbirth and the placing of a natural event into a pathological illness model through necessity has repercussions for the ways in which women experience and make sense of the event.  Knowing this, six whānau stories were collected comprising of four individual interviews with the mothers and two whānau hui (focus groups).  My use of a narrative methodology and kaupapa Māori approach enabled all the participants the opportunity to share their stories on how they make sense of their own experiences without the frame of pathological illness. 

The findings present each whānau story autonomously, to highlight the key events that   occur once the birth of a premature/special-care infant is admitted into an NICU. The participants' narratives followed their transitions through an NICU and return home. The narrative analysis and discussion confirmed that this research had been successful in creating a space for the mothers and their whānau members to share their stories.  The discussion combined their narratives to reveal that the effective coping strategies did not remove the sources of stress but rather lessened the impact of the stresses.  In situations where sources of stress were unable to be removed or reduced, participants perceptions of ineffective coping translated into narratives of negative perceptions of the NICU, and birthing experience. 

The importance of positive relationships within an NICU, and in particular, the role of the nurse as a key facilitator, highlighted that efficacious communication resulted in positive experiences for Māori whānau.  Whānau support was identified as one of the most important coping strategies for mothers in the NICU.  Those participants who were encouraged to maintain connections with whānau members reported more positive experiences overall.

Three levels of implications were identified in this research. Firstly, that the participants'narratives provided a range of coping strategies for future Māori parents and their whānau who enter an NICU.  Secondly, there are implications for NICU policy, and best practice particularly when supporting Māori in an NICU environment.  Lastly, the narratives provided meaningful insights that contribute to gaps in local, national, and international literature.  Overall, I realised that just like me, these mothers, and other whānau members, constructed narratives that are meaningful accounts to be shared with others.

year: 2009