title: Distinguishing rhyolitic and andesitic tephra as soil parent materials for series definition

authors: Lowe, David J.

abstract: I have been following the correspondence in New Zealand Soil- News regarding the classification of the New Plymouth and Otorohanga series with considerable interest - all the comments and replies have been illuminating. In discussing the separation (at series level) of soils developed in andesitic tephra from those in rhyolitic tephra, Clayden et al. (1989, p. 44) ask the questions: (i) ... "can we develop quantitative definitions for each of these materials , and (2) ... "can they be consistently distinguished –in the soil profile by field techniques when weathered to form the horizons of a yellow-brown loam?" The short answer to (1) is yes; the answer to (2) could be yes, but depends on the degree of quantitativeness required and the skill of the field scientist in mineral identification.

text: Distinguishing rhyolitic and andesitic tephra as soil parent materials for series definition I have been following the correspondence in New Zealand Soil- News regarding the classification of the New Plymouth and Otorohanga series with considerable interest - all the comments and replies have been illuminating. In discussing the separation (at series level) of soils developed in andesitic tephra from those in rhyolitic tephra, Clayden et al. (1989, p. 44) ask the questions: (i) ... "can we develop quantitative definitions for each of these materials , and (2) ... "can they be consistently distinguished –in the soil profile by field techniques when weathered to form the horizons of a yellow-brown loam?" The short answer to (1) is yes; the answer to (2) could be yes, but depends on the degree of quantitativeness required and the skill of the field scientist in mineral identification.

year: 1989

title: Leaders life aspirations and job burnout: a self-determination theory approach

authors: Roche, Maree A.

subjects: aspirations

abstract: Purpose – The purpose of this paper is to explore the implications of leaders’ life goals on their work related wellbeing. Self-determination theory (SDT) asserts aspirations (life goals) pursued in terms of personal growth, health, affiliation and community support psychological wellbeing, while aspirations of wealth, image and fame thwart wellbeing. However, little is understood about the influence of life goals towards leaders’ wellbeing at work, specifically job burnout.
Design – The study explores seven dimensions of aspirations on a sample of 386 New Zealand leaders towards emotional exhaustion and cynicism. Data were collected in two waves (1=predictors and 2=outcomes) and structural equation modeling was used to test the relationships between variables.
Findings – The study found that all extrinsic aspirations were significantly and positively correlated with job burnout, while mainly the intrinsic aspirations were significantly and negatively correlated. The structural model showed that wealth and image aspirations were positively related to emotional exhaustion and cynicism, while health aspirations were negatively related. Finally, relationship aspirations were negatively related to cynicism.
Implications – This study shows the importance of life goals and the role they play towards leaders’ job burnout. Leaders focussed on extrinsic aspirations are more likely to burnout at work than those focussed on intrinsic aspirations. Hence, what leaders focus on in terms of overall life objectives matter for their workplace wellbeing.
Originality/value – Findings are significant because, for the first time, relationships between the SDT dimensions associated with (a leader's) life goal orientations and job burnout has been established.

text: Leaders life aspirations and job burnout: a self-determination theory approach Purpose – The purpose of this paper is to explore the implications of leaders’ life goals on their work related wellbeing. Self-determination theory (SDT) asserts aspirations (life goals) pursued in terms of personal growth, health, affiliation and community support psychological wellbeing, while aspirations of wealth, image and fame thwart wellbeing. However, little is understood about the influence of life goals towards leaders’ wellbeing at work, specifically job burnout.
Design – The study explores seven dimensions of aspirations on a sample of 386 New Zealand leaders towards emotional exhaustion and cynicism. Data were collected in two waves (1=predictors and 2=outcomes) and structural equation modeling was used to test the relationships between variables.
Findings – The study found that all extrinsic aspirations were significantly and positively correlated with job burnout, while mainly the intrinsic aspirations were significantly and negatively correlated. The structural model showed that wealth and image aspirations were positively related to emotional exhaustion and cynicism, while health aspirations were negatively related. Finally, relationship aspirations were negatively related to cynicism.
Implications – This study shows the importance of life goals and the role they play towards leaders’ job burnout. Leaders focussed on extrinsic aspirations are more likely to burnout at work than those focussed on intrinsic aspirations. Hence, what leaders focus on in terms of overall life objectives matter for their workplace wellbeing.
Originality/value – Findings are significant because, for the first time, relationships between the SDT dimensions associated with (a leader's) life goal orientations and job burnout has been established.

year: 2013

title: The biology and general ecology of the Koaro (Galaxias brevipinnis) in some tributary streams of Lake Taupo

authors: Kusabs, Ian Andrew

abstract: The ecology and general biology of Galaxias brevipinnis were studied in three tributary streams of Lake Taupo between May 1988 and April 1989. Adult koaro were found in relatively high densities in the Waipehi and Omori streams but in low densities in the larger Waiotaka stream. The results of population estimation studies suggest that the distribution and abundance of koaro is negatively correlated with that of trout. There was a general decline in the population density of stream-resident koaro in the winter months. Juvenile koaro were found to migrate into the tributaries from August to December, with migrations being at a peak in October and November.

Population length-frequency distributions and otoliths used to age koaro indicated that there were up to 5 age classes. Growth was allometric and was adequately described by the von Bertalanffy equation after the first year of life. Koaro were found to be in best condition in the Spring and lowest in Winter.

Spawning appeared to occur from December through to April peaking in late Summer to early in the Waipehi Stream was Autumn. The mean fecundity of koaro approximately 5500. A sex-ratio of approximately 1:1 (males: females) were found in the koaro populations in the Omori and Waipehi streams, but during spawning there were always more ripe males than gravid females.

There was considerable overlap in the diets of both koaro and juvenile rainbow trout in the Waipehi and Omori streams, with invertebrates being consumed according to their relative abundance in the benthos. Ephemeroptera larvae were numerically the most important food item in the diet of both species. However, by weight, fish (juvenile koaro) were the most important food · item in the diet of koaro and rainbow trout in the Waipehi stream. In the Omori stream in Winter, trout eggs were the most important food item in terms of weight. Terrestrial prey was found to be of relatively minor importance in the diets of koaro and rainbow trout in the Waipehi and Omori streams.

text: The biology and general ecology of the Koaro (Galaxias brevipinnis) in some tributary streams of Lake Taupo The ecology and general biology of Galaxias brevipinnis were studied in three tributary streams of Lake Taupo between May 1988 and April 1989. Adult koaro were found in relatively high densities in the Waipehi and Omori streams but in low densities in the larger Waiotaka stream. The results of population estimation studies suggest that the distribution and abundance of koaro is negatively correlated with that of trout. There was a general decline in the population density of stream-resident koaro in the winter months. Juvenile koaro were found to migrate into the tributaries from August to December, with migrations being at a peak in October and November.

Population length-frequency distributions and otoliths used to age koaro indicated that there were up to 5 age classes. Growth was allometric and was adequately described by the von Bertalanffy equation after the first year of life. Koaro were found to be in best condition in the Spring and lowest in Winter.

Spawning appeared to occur from December through to April peaking in late Summer to early in the Waipehi Stream was Autumn. The mean fecundity of koaro approximately 5500. A sex-ratio of approximately 1:1 (males: females) were found in the koaro populations in the Omori and Waipehi streams, but during spawning there were always more ripe males than gravid females.

There was considerable overlap in the diets of both koaro and juvenile rainbow trout in the Waipehi and Omori streams, with invertebrates being consumed according to their relative abundance in the benthos. Ephemeroptera larvae were numerically the most important food item in the diet of both species. However, by weight, fish (juvenile koaro) were the most important food · item in the diet of koaro and rainbow trout in the Waipehi stream. In the Omori stream in Winter, trout eggs were the most important food item in terms of weight. Terrestrial prey was found to be of relatively minor importance in the diets of koaro and rainbow trout in the Waipehi and Omori streams.

year: 1989