title: Invertebrate food supplies and diet of blue duck on rivers in two regions of the North Island, New Zealand

authors: Collier, Kevin J.

subjects: blue duck

abstract: Benthic invertebrates and samples of blue duck faeces were collected in September 1988 from sites along Manganuiateao River, central North Island, and in November 1988 from seven rivers and streams on the East Cape. The occurrence of invertebrate taxa in the faeces varied within and between rivers, and within pairs of birds and family groups on the East Cape. In both regions, most blue duck had been consuming large proportions of cased caddisfly larvae. These are thought to have been mainly species of Helicopsyche and Pycnocentrodes at the East Cape sites and Beraeoptera roria at the Manganuiateao sites. Plecoptera larvae were also relatively abundant in blue duck faeces from most Manganuiateao sites in September. Overall, blue duck consumed proportionately more cased caddisfly larvae than occurred in the benthos (especially at the East Cape sites), but fewer Chironomidae, Coloburiscus humeralis and leptophlebiid mayfly (mainly Deleatidium spp.) larvae. Factors that affect the type of invertebrate foods available to blue duck at a particular site could include habitat heterogeneity, chance encounter, frequency and magnitude of floods, and geographic differences in the pool of invertebrate colonists. Apparent selectivity or avoidance of some benthic invertebrate groups by blue duck may partly reflect predator evasion by fast-moving invertebrate species, and differences in activity and distribution on upper stone surfaces where invertebrates should be more susceptible to predation by blue duck.

text: Invertebrate food supplies and diet of blue duck on rivers in two regions of the North Island, New Zealand Benthic invertebrates and samples of blue duck faeces were collected in September 1988 from sites along Manganuiateao River, central North Island, and in November 1988 from seven rivers and streams on the East Cape. The occurrence of invertebrate taxa in the faeces varied within and between rivers, and within pairs of birds and family groups on the East Cape. In both regions, most blue duck had been consuming large proportions of cased caddisfly larvae. These are thought to have been mainly species of Helicopsyche and Pycnocentrodes at the East Cape sites and Beraeoptera roria at the Manganuiateao sites. Plecoptera larvae were also relatively abundant in blue duck faeces from most Manganuiateao sites in September. Overall, blue duck consumed proportionately more cased caddisfly larvae than occurred in the benthos (especially at the East Cape sites), but fewer Chironomidae, Coloburiscus humeralis and leptophlebiid mayfly (mainly Deleatidium spp.) larvae. Factors that affect the type of invertebrate foods available to blue duck at a particular site could include habitat heterogeneity, chance encounter, frequency and magnitude of floods, and geographic differences in the pool of invertebrate colonists. Apparent selectivity or avoidance of some benthic invertebrate groups by blue duck may partly reflect predator evasion by fast-moving invertebrate species, and differences in activity and distribution on upper stone surfaces where invertebrates should be more susceptible to predation by blue duck.

year: 1991

title: Can you feel the pressure? Examining the effects of anxiety in elite netball shooters

authors: Tong, Georgia Terri

abstract: Netball is an increasingly popular sport for women in New Zealand, with the national league competition being fully professional. One important skill within netball is goal shooting, as the goal volume and accuracy ultimately decides the outcome of the game. Therefore, it is critical that shooters are able to perform this task well under pressure. The first part of this thesis reviews the literature on the effects of anxiety on sport performance. The second part of this thesis includes two studies. The first study, Study A (Chapter 2), was an observational, retrospective analysis of performance of 15 shooters in the top New Zealand competition at different score-lines and time points throughout netball games. The analysis showed that when one and two goals ahead, as well as other specific time points such as first shot of the quarter, the shooters shot significantly worse than the individual mean accuracy, but when three or four goals ahead the opposite effect occurred, a performance decrease. The fluctuation in performance demonstrated the possible influence of anxiety and individual differences on performance under pressure, along with the need to examine performance under pressure in a controlled setting in elite netball shooters. The second study, Study B (Chapter 3), was an experimental study designed to investigate the anxiety-performance relationship in elite netball athletes. Eleven elite netball shooters performed 100 shots at goal under four conditions: high-pressure defender present, high-pressure defender absent, low-pressure defender present, and low-pressure defender absent. Increased perceived anxiety, heart rate and task completion time occurred in the high-pressure conditions; however trait anxiety, concentration disruption in particular, predicted performance under low-pressure but not high-pressure conditions. In conclusion, the outcomes of these studies demonstrate that performance fluctuation occurs under pressure and that there may be individual differences in performance under pressure. The need for greater investigation of anxiety induced by high-pressure in elite professional netballers is apparent.

text: Can you feel the pressure? Examining the effects of anxiety in elite netball shooters Netball is an increasingly popular sport for women in New Zealand, with the national league competition being fully professional. One important skill within netball is goal shooting, as the goal volume and accuracy ultimately decides the outcome of the game. Therefore, it is critical that shooters are able to perform this task well under pressure. The first part of this thesis reviews the literature on the effects of anxiety on sport performance. The second part of this thesis includes two studies. The first study, Study A (Chapter 2), was an observational, retrospective analysis of performance of 15 shooters in the top New Zealand competition at different score-lines and time points throughout netball games. The analysis showed that when one and two goals ahead, as well as other specific time points such as first shot of the quarter, the shooters shot significantly worse than the individual mean accuracy, but when three or four goals ahead the opposite effect occurred, a performance decrease. The fluctuation in performance demonstrated the possible influence of anxiety and individual differences on performance under pressure, along with the need to examine performance under pressure in a controlled setting in elite netball shooters. The second study, Study B (Chapter 3), was an experimental study designed to investigate the anxiety-performance relationship in elite netball athletes. Eleven elite netball shooters performed 100 shots at goal under four conditions: high-pressure defender present, high-pressure defender absent, low-pressure defender present, and low-pressure defender absent. Increased perceived anxiety, heart rate and task completion time occurred in the high-pressure conditions; however trait anxiety, concentration disruption in particular, predicted performance under low-pressure but not high-pressure conditions. In conclusion, the outcomes of these studies demonstrate that performance fluctuation occurs under pressure and that there may be individual differences in performance under pressure. The need for greater investigation of anxiety induced by high-pressure in elite professional netballers is apparent.

year: 2019

title: Re-designing the national imaginary: The development of Matariki as a contemporary festival

authors: Hardy, Ann

subjects: Aotearoa/New Zealand

abstract: This article considers the factors shaping the contemporary redevelopment in Aotearoa/ New Zealand of the indigenous commemoration of the rising of the constellation Matariki as a marker of seasonal change.  Through interviews with producers of media materials celebrating Matariki, it examines the ideological, cultural, and economic factors determining the encoding of the materials, investigating in particular the ways in which Matariki can resource a marketplace for spiritual commodities.

text: Re-designing the national imaginary: The development of Matariki as a contemporary festival This article considers the factors shaping the contemporary redevelopment in Aotearoa/ New Zealand of the indigenous commemoration of the rising of the constellation Matariki as a marker of seasonal change.  Through interviews with producers of media materials celebrating Matariki, it examines the ideological, cultural, and economic factors determining the encoding of the materials, investigating in particular the ways in which Matariki can resource a marketplace for spiritual commodities.

year: 2012