The katipō is an endemic New Zealand spider that was previously common in the sand dunes at New B... more The katipō is an endemic New Zealand spider that was previously common in the sand dunes at New Brighton. At sites on Banks Peninsula, katipō were detected under dried seaweed on the strandline 70% of the time. However, we detected no katipō among strandlines at New Brighton after 382 sampling visits. Incorporating these results into binomial and iterative Bayesian sampling models, it appeared highly unlikely that katipō still existed at New Brighton given so many non-detection events. However, when re-visiting the site, katipō were observed in the dunes at two locations, although they were still not found on the strandline. This specific habitat may be avoided at New Brighton due to high exposure to the prevalent strong easterly winds that occur at this site. The results emphasise that sampling models that use non-detection to indicate the likelihood of species absence can be highly specific to the sampling method used.
Bulletin of Environmental Contamination and Toxicology, Jul 1, 2000
With pressure from international markets on producers to minimize their use of agrochemicals, the... more With pressure from international markets on producers to minimize their use of agrochemicals, the sustainability of agro-ecological systems is of rapidly growing interest and various invertebrate indicators have been proposed as measures of environmental 'health' (Wratten et al. 1997, 1998; McGeoch 1998). The Tasmanian lacewing (Micromus tasmaniae (Walker); Neuroptera: Hemerobiidae) is a common predator in cereal, vegetable and legume crops in New Zealand (Leathwick 1989). Both adult and juvenile neuropterans are voracious predators of many invertebrate agricultural pests, and the presence of M. tasmaniae is justifiably considered beneficial to agricultural systems (New 1975). The species is considered important in integrated approaches to pest management and its use as a biomonitor of stewardship practices in New Zealand farms is being developed (Wratten et al. 1997).
... This work was funded by a NERC stu-dentship (GT4/91/TLS/70) undertaken by S. Hodge. Reference... more ... This work was funded by a NERC stu-dentship (GT4/91/TLS/70) undertaken by S. Hodge. References Abrams, PA 1987. On classifying interactions between popu-lations. ... 1987. The evolutionary dynamics of Batesian and Muelle-rian mimicry: similarities and differences. ...
'The most important single factor influencing learning is what the learner alread... more 'The most important single factor influencing learning is what the learner already knows. Ascertain this and teach him accordingly.' D. P. Ausubel (1968)Prior knowledge tests were carried out on undergraduates in a second year 'Principles of Ecology' course at Lincoln University, New Zealand. The same test was repeated at the end of the course, helping to indicate how successful the
. 1. This study examined the invasion sequence of Drosophila species arriving at decomposing stra... more . 1. This study examined the invasion sequence of Drosophila species arriving at decomposing strawberries.2. It was found that the age of fruit affected the likelihood of Drosophila arrival, flies preferring relatively fresh fruit. However, there were no repeatable trends in invasion sequence of Drosophila species, different species responding in a similar manner to changes in fruit age.3. Although no systematic trends in invasion sequence were observed, species tended to be temporally separated due to stochastic differences in their arrival at the fruit.4. It is suggested that stochastic, as well as repeatable, temporal separation of species can have an important influence on subsequent community development.
The katipō is an endemic New Zealand spider that was previously common in the sand dunes at New B... more The katipō is an endemic New Zealand spider that was previously common in the sand dunes at New Brighton. At sites on Banks Peninsula, katipō were detected under dried seaweed on the strandline 70% of the time. However, we detected no katipō among strandlines at New Brighton after 382 sampling visits. Incorporating these results into binomial and iterative Bayesian sampling models, it appeared highly unlikely that katipō still existed at New Brighton given so many non-detection events. However, when re-visiting the site, katipō were observed in the dunes at two locations, although they were still not found on the strandline. This specific habitat may be avoided at New Brighton due to high exposure to the prevalent strong easterly winds that occur at this site. The results emphasise that sampling models that use non-detection to indicate the likelihood of species absence can be highly specific to the sampling method used.
Bulletin of Environmental Contamination and Toxicology, Jul 1, 2000
With pressure from international markets on producers to minimize their use of agrochemicals, the... more With pressure from international markets on producers to minimize their use of agrochemicals, the sustainability of agro-ecological systems is of rapidly growing interest and various invertebrate indicators have been proposed as measures of environmental 'health' (Wratten et al. 1997, 1998; McGeoch 1998). The Tasmanian lacewing (Micromus tasmaniae (Walker); Neuroptera: Hemerobiidae) is a common predator in cereal, vegetable and legume crops in New Zealand (Leathwick 1989). Both adult and juvenile neuropterans are voracious predators of many invertebrate agricultural pests, and the presence of M. tasmaniae is justifiably considered beneficial to agricultural systems (New 1975). The species is considered important in integrated approaches to pest management and its use as a biomonitor of stewardship practices in New Zealand farms is being developed (Wratten et al. 1997).
... This work was funded by a NERC stu-dentship (GT4/91/TLS/70) undertaken by S. Hodge. Reference... more ... This work was funded by a NERC stu-dentship (GT4/91/TLS/70) undertaken by S. Hodge. References Abrams, PA 1987. On classifying interactions between popu-lations. ... 1987. The evolutionary dynamics of Batesian and Muelle-rian mimicry: similarities and differences. ...
'The most important single factor influencing learning is what the learner alread... more 'The most important single factor influencing learning is what the learner already knows. Ascertain this and teach him accordingly.' D. P. Ausubel (1968)Prior knowledge tests were carried out on undergraduates in a second year 'Principles of Ecology' course at Lincoln University, New Zealand. The same test was repeated at the end of the course, helping to indicate how successful the
. 1. This study examined the invasion sequence of Drosophila species arriving at decomposing stra... more . 1. This study examined the invasion sequence of Drosophila species arriving at decomposing strawberries.2. It was found that the age of fruit affected the likelihood of Drosophila arrival, flies preferring relatively fresh fruit. However, there were no repeatable trends in invasion sequence of Drosophila species, different species responding in a similar manner to changes in fruit age.3. Although no systematic trends in invasion sequence were observed, species tended to be temporally separated due to stochastic differences in their arrival at the fruit.4. It is suggested that stochastic, as well as repeatable, temporal separation of species can have an important influence on subsequent community development.
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