title: Wild record of an apple snail in the Waikato River, Hamilton, New Zealand and their incidence in freshwater aquaria

authors: Collier, Kevin J.

subjects: Ampullariidae

abstract: We report the discovery of a single specimen of a live apple snail Pomacea diffusa Blume 1957 (Ampullariidae: Prosobranchia), from the Waikato River, Hamilton city, central North Island, New Zealand. This species, along with the congeneric P. insularum, is imported for the aquarium trade, and its occurrence in the river likely stemmed from an aquarium release. A survey of 55 aquaria belonging to 43 hobbyists revealed 27 apple snails, with one owner having 22 snails. Assessment of environmental tolerances and impacts of P. diffusa, based largely on studies of the closely related and commonly confused congener P. bridgesii, suggests that direct habitat impacts by this species are likely to be minor. However, there could be indirect influences on native biodiversity through predation on eggs or competition for food supplies with other detritivorous species if densities were to become high. Water temperatures in the Waikato River below Hamilton (10-23˚C in 2009) may enable released individuals to persist for an extended period, and over summer may exceed the threshold required to enable breeding. However, population establishment would be most likely in locations where water is heated through geothermal influences or industrial cooling water discharges.

text: Wild record of an apple snail in the Waikato River, Hamilton, New Zealand and their incidence in freshwater aquaria We report the discovery of a single specimen of a live apple snail Pomacea diffusa Blume 1957 (Ampullariidae: Prosobranchia), from the Waikato River, Hamilton city, central North Island, New Zealand. This species, along with the congeneric P. insularum, is imported for the aquarium trade, and its occurrence in the river likely stemmed from an aquarium release. A survey of 55 aquaria belonging to 43 hobbyists revealed 27 apple snails, with one owner having 22 snails. Assessment of environmental tolerances and impacts of P. diffusa, based largely on studies of the closely related and commonly confused congener P. bridgesii, suggests that direct habitat impacts by this species are likely to be minor. However, there could be indirect influences on native biodiversity through predation on eggs or competition for food supplies with other detritivorous species if densities were to become high. Water temperatures in the Waikato River below Hamilton (10-23˚C in 2009) may enable released individuals to persist for an extended period, and over summer may exceed the threshold required to enable breeding. However, population establishment would be most likely in locations where water is heated through geothermal influences or industrial cooling water discharges.

year: 2011

title: Towards understanding models for statistical literacy: A literature review.

authors: Sharma, Sashi

subjects: statistics education

abstract: Despite statistical literacy being relatively new in statistics education research, it needs special attention as attempts are being made to enhance the teaching, learning and assessing of this strand. It is important that teachers are aware of the challenges of teaching this literacy. The growing importance of statistics in today's information world and conceptions and components of statistical literacy are outlined. Frameworks for developing statistical literacy from research literature are considered next. Strengths and weaknesses of the models are considered. Examples of tasks used in statistics education research are provided to explain the levels of thinking. The paper concludes with some implications for teaching and research.

text: Towards understanding models for statistical literacy: A literature review. Despite statistical literacy being relatively new in statistics education research, it needs special attention as attempts are being made to enhance the teaching, learning and assessing of this strand. It is important that teachers are aware of the challenges of teaching this literacy. The growing importance of statistics in today's information world and conceptions and components of statistical literacy are outlined. Frameworks for developing statistical literacy from research literature are considered next. Strengths and weaknesses of the models are considered. Examples of tasks used in statistics education research are provided to explain the levels of thinking. The paper concludes with some implications for teaching and research.

year: 2010

title: How is the circular economy emerging in Aotearoa New Zealand? Research Brief

authors: Diprose, G

abstract: The results of the environmental scan show that there is grass-roots activity and that we have some high level conceptualisations of circular economies (CE) however there is little in-between. As such, it is in the middle that activity needs to occur to transition towards a circular economy. We see a need to move beyond business-as-usual with an entity focus to an ‘ecosystem phase.’ This means that for CE, partnerships are needed across business, organisations, Treaty partners, institutions, NGOs and stakeholders to form collaborations around material and people flows in order for ecosystems to form and create circular economies.

text: How is the circular economy emerging in Aotearoa New Zealand? Research Brief The results of the environmental scan show that there is grass-roots activity and that we have some high level conceptualisations of circular economies (CE) however there is little in-between. As such, it is in the middle that activity needs to occur to transition towards a circular economy. We see a need to move beyond business-as-usual with an entity focus to an ‘ecosystem phase.’ This means that for CE, partnerships are needed across business, organisations, Treaty partners, institutions, NGOs and stakeholders to form collaborations around material and people flows in order for ecosystems to form and create circular economies.

year: 2022