ORCID Profile
0000-0003-1419-0768
Current Organisation
Murdoch University
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Publisher: Informa UK Limited
Date: 03-11-2022
Publisher: Wiley
Date: 12-2004
Publisher: No publisher found
Publisher: Juniper Publishers
Date: 21-02-2018
Publisher: Wiley
Date: 09-2006
Publisher: Wiley
Date: 23-06-2020
DOI: 10.1111/EVJ.13292
Abstract: Pituitary pars intermedia dysfunction (PPID) is commonly investigated using plasma ACTH concentrations but problems exist with currently available diagnostic thresholds. To derive temporally specific diagnostic thresholds for equine plasma ACTH concentration to be used alongside clinical judgement in each in idual week of the year and appropriate for the degree of clinical suspicion in any given case. Furthermore, to apply these thresholds to compare the prevalence of high and low ACTH in two subgroups of animals with high and low clinical suspicion of PPID. A retrospective population study examining a large laboratory database of equine plasma ACTH concentrations using an indirect approach to calculate diagnostic thresholds. Logs of plasma ACTH concentrations from 75 892 in idual horses were examined using robust L For most of the year there were small interweek differences in diagnostic thresholds. However, from mid-June to early-December diagnostic thresholds showed greater interweek variability, reaching a maximum in late September and early October. Grouping of high- and low-ACTH compared favourably with grouping based on clinical signs. Given the multiple sources of diagnostic s les, pre-analytical data could not be fully verified. Diagnostic thresholds for equine plasma ACTH vary through the year. It is especially important to consider the temporally specific threshold between June and December. Different clinical thresholds can be used depending on the case circumstances and whether a false-positive or false-negative diagnosis is deemed least desirable.
Publisher: No publisher found
Publisher: Springer Science and Business Media LLC
Date: 24-02-2017
Publisher: Wiley
Date: 12-2011
Publisher: Elsevier BV
Date: 1986
Publisher: Wiley
Date: 05-1982
Publisher: Elsevier BV
Date: 05-2007
Publisher: Informa UK Limited
Date: 2002
Publisher: Wiley
Date: 12-2017
DOI: 10.1111/ANZS.12219
Publisher: Informa UK Limited
Date: 07-2005
Publisher: No publisher found
Publisher: University of Zielona Góra, Poland
Date: 2000
DOI: 10.7151/DMPS.1002
Publisher: No publisher found
Publisher: No publisher found
Publisher: Informa UK Limited
Date: 18-11-2015
Publisher: No publisher found
DOI: 10.1002/ZOO.20317}
Publisher: Springer Science and Business Media LLC
Date: 09-2004
DOI: 10.1007/BF03372106
Publisher: No publisher found
Publisher: Springer Science and Business Media LLC
Date: 30-09-2012
Publisher: CSIRO Publishing
Date: 2008
DOI: 10.1071/AM08005
Abstract: Urine was collected from numbats (Myrmecobius fasciatus) held at the Perth Zoo (Western Australian) as part of the native Species Breeding Programme which breeds animals in captivity to by released to the wild. Osmolality and creatinine concentrations were very variable despite the provision of water ad libitum and a controlled diet. Progestogen was normalised by iding the concentration by both the creatinine concentration and the osmolality of the urine. The correlation of these two ratios was highly significant for 7 of the 9 animals.
Publisher: Springer Science and Business Media LLC
Date: 1994
DOI: 10.1007/BF00773595
Publisher: Wiley
Date: 29-11-2012
Publisher: Wiley
Date: 03-1994
Publisher: Springer Science and Business Media LLC
Date: 06-2023
DOI: 10.1007/S00362-022-01319-7
Abstract: This paper makes comparisons of automated procedures for robust multivariate outlier detection through discussion and simulation. In particular, automated procedures that use the forward search along with Mahalanobis distances to identify and classify multivariate outliers subject to predefined criteria are examined. Procedures utilizing a parametric model criterion based on a $$\\chi ^2$$ χ 2 -distribution are among these, whereas the multivariate Adaptive Trimmed Likelihood Algorithm (ATLA) identifies outliers based on an objective function that is derived from the asymptotics of the location estimator assuming a multivariate normal distribution. Several criterion including size (false positive rate), sensitivity, and relative efficiency are canvassed. To illustrate relative efficiency in a multivariate setting in a new way, measures of variability of the multivariate location parameter when the underlying distribution is chosen from a multivariate generalization of the Tukey–Huber $$\\epsilon $$ ϵ -contamination model are used. Mean slippage models are also entertained. The simulation results here are illuminating and demonstrate there is no broadly accepted procedure that outperforms in all situations, albeit one may ascertain circumstances for which a particular method may be best if implemented. Finally the paper explores graphical monitoring for existence of clusters and the potential of classification through occurrence of multiple minima in the objective function using ATLA.
Publisher: Elsevier BV
Date: 02-1989
Publisher: No publisher found
DOI: 10.1007/BF00773595}
Publisher: University of Zielona Góra, Poland
Date: 2007
DOI: 10.7151/DMPS
Publisher: Wiley
Date: 03-2000
Publisher: Springer Science and Business Media LLC
Date: 05-02-2014
Publisher: Wiley
Date: 2011
DOI: 10.1002/ZOO.20317
Abstract: In 1997, Perth Zoo acquired six pink-eared turtles (Emydura victoriae) from the wild for display in the reptile facility. There is very little documented information on pink-eared turtles in captivity. This article looks at the reproductive biology, ecology, behavior, diet, and captive husbandry of the species. Eight clutches of eggs were documented over a 2-year period with an average clutch size of 10 eggs. Egg size was recorded with three clutches incubated to hatching. Ten hatchlings were maintained for a growth and development study. Measurements of weight, carapace length, width, height, and plastron length were recorded weekly for about 12 months, and then monthly for approximately 2 years. The data were analyzed and showed positive growth curves in all animals. Sexual dimorphism was observed after 20 weeks and sexual maturity in males observed after 2 years.
Publisher: No publisher found
DOI: 10.1007/BF00339936}
Publisher: Wiley
Date: 12-2017
DOI: 10.1111/ANZS.12222
Publisher: Cambridge University Press (CUP)
Date: 02-1991
DOI: 10.1017/S1446788700032572
Abstract: Estimators which have locally uniform expansions are shown in this paper to be asymptotically equivalent to M -estimators. The M -functionals corresponding to these M -estimators are seen to be locally uniformly Fréchet differentiable. Other conditions for M -functionals to be locally uniformly Fréchet differentiable are given. An ex le of a commonly used estimator which is robust against outliers is given to illustrate that the locally uniform expansion need not be valid.
Publisher: Informa UK Limited
Date: 1992
Publisher: Wiley
Date: 06-1993
Publisher: Springer Science and Business Media LLC
Date: 09-1986
DOI: 10.1007/BF00339936
Publisher: No publisher found
Publisher: No publisher found
Publisher: No publisher found
Publisher: No publisher found
Publisher: No publisher found
Publisher: No publisher found
Publisher: Informa UK Limited
Date: 12-1998
Publisher: Informa UK Limited
Date: 2007
DOI: 10.1080/01485010701730658
Abstract: The Sperm Quality Analyzer (SQA) IIB, a member of the SQA-II family of machines which uses the scatter of light by sperm as an indicator of sperm motility, was systematically evaluated as a means of analyzing objectively the motility of porcine epididymal sperm. The sperm motility (%) and the Sperm Motility Index (SMI) are calculated by the machine using pre-programmed algorithms designed for human sperm. The machine performed well and was able to detect changes in sperm motility under experimental conditions. However, two major limitations of this machine were identified, (i) the readings obtained were influenced by the concentration of the sperm suspension despite the actual sperm motility remaining constant, and (ii) the machine was unable to differentiate between progressive and non-progressive motility. It should therefore be recognized that (a) the sperm concentration must be kept constant in studies in vitro if differences between treatment groups are to be identified, and (b) the inability to separate progressive motility from that of total motility will restrict the usefulness of this and similar machines to studies monitoring changes in total motility alone.
Publisher: Wiley
Date: 07-07-2019
DOI: 10.1111/GGR.12278
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Brenton R Clarke.