Journal Articles
Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915
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Item The number of larval instars in the flax weevil (Anagotus fairburni) (Coleoptera: Curculionidae)(Published by Informa UK Limited, trading as Taylor & Francis Group, 2023-09-20) Brockelsby WD; Miskelly CM; Glare TR; Minor MAThe flax weevil Anagotus fairburni is a large flightless beetle, that is one of the members of the endemic insect ‘megafauna’ of New Zealand. It is a protected species that currently persists only on predator-free islands or in remote and difficult to access alpine areas. Little is documented about the ecology of the flax weevil. In this study we estimated the number of instars in the A. fairburni life cycle by measuring the head capsule widths of larvae collected in the field on Mana Island Scientific Reserve. We used kernel density function estimates to predict average head-capsule widths and the number of larval instars. We then used Brooks-Dyar’s law on the head capsule width data and analysed Brooks and Crosby indexes to refine the estimated number of instars based on imperfect data. Results from sampling of 86 larvae suggested four instar groupings, but further analysis based on Brooks-Dyar’s law found that A. fairburni likely passes through 6 or 7 larval stages prior to pupation, with some uncertainty for smaller instars. Our method provides new data on ecology of an endemic species and provides a framework for further work on similar endangered species where data is imperfect or difficult to gather.Item ‘Cheap, Scientific and Free From Danger’: Accounting for the Development of Field Hockey in Aotearoa New Zealand(Taylor and Francis Group, 2024-08-05) Watson G; Hess RHockey’s emergence as an organized sport in New Zealand is typically regarded as having occurred during the 1890s. Reverend Henry Mathias, who formed the Kaiapoi Hockey Club in 1895, has been credited with a particularly influential part in the game’s development. Indeed, there is considerable truth to this foundation story in that the formation of clubs in Christchurch was the catalyst for the adoption of the 11-a-side form of the game played under the rules of the Hockey Association of England. Arguably, however, these 1890s developments represent a reformatory phase rather than an origin story in and of themselves. The analysis of online newspaper records contained in this paper suggests a widespread presence of informal games from at least as early as the 1860s, through to the formation of the Dunedin Hockey Club in 1876. Hockey also appears to have been played in schools from at least as early as the 1870s and, outside of school, was sometimes associated with ‘larrikinism’. By the 1890s, though, it was perceived to be a respectable game, supported by dedicated patrons and a much more developed sporting infrastructure in New Zealand.Item Functional development of the adult ovine mammary gland--insights from gene expression profiling.(5/10/2015) Paten AM; Duncan EJ; Pain SJ; Peterson SW; Kenyon PR; Blair HT; Dearden PKBACKGROUND: The mammary gland is a dynamic organ that undergoes dramatic physiological adaptations during the transition from late pregnancy to lactation. Investigation of the molecular basis of mammary development and function will provide fundamental insights into tissue remodelling as well as a better understanding of milk production and mammary disease. This is important to livestock production systems and human health. Here we use RNA-seq to identify differences in gene expression in the ovine mammary gland between late pregnancy and lactation. RESULTS: Between late pregnancy (135 days of gestation ± 2.4 SD) and lactation (15 days post partum ± 1.27 SD) 13 % of genes in the sheep genome were differentially expressed in the ovine mammary gland. In late pregnancy, cell proliferation, beta-oxidation of fatty acids and translation were identified as key biological processes. During lactation, high levels of milk fat synthesis were mirrored by enrichment of genes associated with fatty acid biosynthesis, transport and lipogenesis. Protein processing in the endoplasmic reticulum was enriched during lactation, likely in support of active milk protein synthesis. Hormone and growth factor signalling and activation of signal transduction pathways, including the JAK-STAT and PPAR pathways, were also differently regulated, indicating key roles for these pathways in functional development of the ovine mammary gland. Changes in the expression of epigenetic regulators, particularly chromatin remodellers, indicate a possible role in coordinating the large-scale transcriptional changes that appear to be required to switch mammary processes from growth and development during late pregnancy to synthesis and secretion of milk during lactation. CONCLUSIONS: Coordinated transcriptional regulation of large numbers of genes is required to switch between mammary tissue establishment during late pregnancy, and activation and maintenance of milk production during lactation. Our findings indicate the remarkable plasticity of the mammary gland, and the coordinated regulation of multiple genes and pathways to begin milk production. Genes and pathways identified by the present study may be important for managing milk production and mammary development, and may inform studies of diseases affecting the mammary gland.Item Contextualizing Sustainable Infrastructure Development in Nigeria(2014) Olanipekun A; Aje I; Awodele O