Coccidiosis in wild rabbits, Oryctolagus cuniculus (L.), at four sites in different climatic regions in eastern Australia I. Relationship with the age of the rabbit

1968 ◽  
Vol 16 (1) ◽  
pp. 69 ◽  
Author(s):  
E Stodart
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Oryctolagus Cuniculus ◽  
New South ◽  
Linear Regression Analysis ◽  
Climatic Regions ◽  
South Wales ◽  
Eastern Australia ◽  
Breeding Seasons

A total of 2881 rabbits were shot during 1962-64 in regular samples from four sites representing different climatic regions in eastern Australia. Samples of the faeces were examined for coccidial oocysts. Seven species of Eimeria (E. stiedae, E. media, E. perforans, E. irresidua, E. magna, E. piriformis, and E. exigua) were recorded. Dried lens weight and paunched (eviscerated) body weight of the rabbits were used as estimates of age. A decrease in oocyst output with increasing age of the rabbit was apparent when progeny of particular breeding seasons were followed and when all data were grouped together at the subalpine site. Linear regression analysis showed that the decrease was greatest at the subalpine site, where the young had high oocyst counts, less in the subtropical and Mediterranean climates, and virtually absent at the arid site. The rate of the decrease varied between species; it was greatest for E. magna and was slight and variable in occurrence for E. piriformis. Adult rabbits transported from the arid site to infected pasture in Canberra were found from 1 to 10 weeks after release to have an oocyst count comparable to that of young rabbits at the subalpine site. Cage-reared progeny of the rabbits from the arid site were more susceptible to accidental infection than cage-reared progeny of rabbits from the temperate southern tablelands of New South Wales.

Effect of Pasture Availability on Bait Uptake by Feral Pigs in Australia's Semi-Arid Rangelands.

1996 ◽  
Vol 23 (4) ◽  
pp. 421 ◽  
Author(s):  
D Choquenot ◽  
B Lukins
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
New South ◽  
Linear Regression Analysis ◽  
Feral Pigs ◽  
South Wales ◽  
Arid Rangelands ◽  
The Relationship ◽  
North Western ◽  
Semi Arid

Factors that influence bait uptake by feral pigs will determine the efficacy of poisoning and trapping programmes for the control of pigs and have the potential to introduce bias to indices of pig abundance requiring bait consumption. In this study, the influence of pasture availability on uptake of bait trails consisting of soaked wheat by pigs in the semi-arid rangelands of north-western New South Wales was investigated. Percentage uptake of bait trails, pig density and pasture biomass were estimated for six sites along the Paroo River on six occasions: two each when pasture biomass was relatively high, moderate and low. The influence of pasture biomass on the relationship between percentage uptake of bait trails and pig density was examined by linear regression analysis. The analysis demonstrated that increasing pasture biomass significantly reduced the density of pigs corresponding to a given percentage uptake of bait trails, suggesting that, as pasture biomass increased, fewer pigs consumed bait trails andlor the number of bait trails each pig consumed declined. Assuming the former, the effect of increasing pasture biomass on the relationship between percentage uptake of bait trails and pig density indicated that, for every increase in pasture biomass of 100 kg ha-1, the percentage of pigs consuming bait declined by about 10%. The implications of these results for pig control and bias associated with indices of pig abundance requiring bait consumption are discussed.

scholarly journals Relations of Morphological Characteristics and Aerobic Durability of Fudbalers of Different Age Categories // Relacije morfoloških karakteristika i aerobne izdržljivosti fudbalera različitih uzrasnih kategorija

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Vladan Pelemiš ◽  
Darijan Ujsasi ◽  
Danica Džinović ◽  
Dušan Josić
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Body Height ◽  
Morphological Characteristics ◽  
Median Volume ◽  
Run Test ◽  
Shuttle Run

The aim of the study was to analyze if there is a connection between some anthropometric measrements and a test for assessing aerobic ability in footballers of different age categories. 65 players were subjected to these measurements, of which 25 players aged 13-14 years (pioneers); 20 players aged 15-16 years (cadets) and 20 players aged 17-18 years (juniors). By using standard anthropometric instruments, body height, body weight, median volume of the chest and aerobic endurance were measured using a 20m “shuttle run” test. Using linear regression analysis, it was found that there is no statistically significant effect of anthropometric variables on a variable (20m “shuttle run”) of all three age players. In these ages, obviously some other characteristics have more influence on the manifestation of aerobic ability. The results of the research can be used by experts in the field of sports in further planning and organizing training contents

Effect of Patient Characteristics on Vessel Enhancement in Pediatric Chest Computed Tomography Angiography

2019 ◽  
Vol 70 (2) ◽  
pp. 181-185
Author(s):  
Takanori Masuda ◽  
Takeshi Nakaura ◽  
Yoshinori Funama ◽  
Tomoyasu Sato ◽  
Tetsuya Nitta ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Patient Characteristics ◽  
Multivariate Linear Regression Analysis ◽  
Chest Computed Tomography ◽  
Pediatric Chest ◽  
Vessel Enhancement

Introduction To evaluate the effect of sex, age, height, cardiac output (CO), total body weight (TBW), body surface area (BSA), and lean body weight (LBW) on vessel enhancement of the ascending aorta in pediatric chest computed tomography angiography (c-CTA). Materials and Methods This retrospective study received institutional review board approval; parental prior informed consent for inclusion was obtained for all patients. All 50 patients were examined using our routine protocol; iodine (600 mg/kg) was the contrast medium (CM). Unenhanced and contrast-enhanced scans were obtained. We calculated the CM volume per vessel enhancement and performed univariate and multivariate linear regression analysis of the relationship between CM volume per vessel enhancement and each of the body parameters. Results All patient characteristics were significantly related to CM volume per vessel enhancement ( P < .05). Multivariate linear regression analysis revealed a significant correlation between CM volume per vessel enhancement and TBW, BSA, and LBW, but not the patient sex, age, CO, and height. The LBW model for CM volume per vessel enhancement yielded the highest determination coefficient (R2 = .913) and the lowest Akaike Information Criterion (400.324). Conclusions Our findings support the delivery of an iodine dose adjusted to the LBW at c-CTA.

The distribution and abundance of the ectoparasites of the wild rabbit, Oryctolagus cuniculus (L.), in New South Wales, Australia

Parasitology ◽  
1972 ◽  
Vol 64 (2) ◽  
pp. 321-330 ◽  
Author(s):  
R. T. Williams
Keyword(s):  
Oryctolagus Cuniculus ◽  
Technical Assistance ◽  
New South ◽  
New South Wales ◽  
Wild Rabbit ◽  
Climatic Regions ◽  
South Wales

In the winters of 1969 and 1970 a total of 64 rabbits was shot at 11 sites covering diverse climatic regions in the western, central and eastern districts of New South Wales. The ectoparasites of these rabbits were identified and counted. The flea Echidnophaga myrmecobii was most frequently found in western districts; the louse Haemadipsus ventricosus was prevalent in the central districts; the mite Listrophorus gibbus was very abundant on rabbits from the eastern districts, whilst the mite Cheyletiella parasitivorax was prevalent on rabbits from central and eastern districts.The probable consequences of these variations are discussed in relation to their possible effects on the epidemiology of myxomatosis.This investigation was carried out as part of the study of the biology of the wild rabbit undertaken by the Division of Wildlife Research, CSIRO, under the general supervision of Mr K. Myers. The author is indebted to P. Haycock and Miss S. Stephens for invaluable technical assistance. Messrs I. Parer, M. Stranger, G. Richards, H. Bults, J. Libke and P. Haycock shot the rabbit samples.

Bayesian hierarchical approach to estimate insulin sensitivity by minimal model

2003 ◽  
Vol 105 (5) ◽  
pp. 551-560 ◽  
Author(s):  
Olorunsola F. AGBAJE ◽  
Stephen D. LUZIO ◽  
Ahmed I. S. ALBARRAK ◽  
David J. LUNN ◽  
David R. OWENS ◽  
...  
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Insulin Sensitivity ◽  
Linear Regression ◽  
Bayesian Analysis ◽  
Minimal Model ◽  
Linear Regression Analysis ◽  
World Health ◽  
Bayesian Hierarchical ◽  
Non Linear

We adopted Bayesian analysis in combination with hierarchical (population) modelling to estimate simultaneously population and individual insulin sensitivity (SI) and glucose effectiveness (SG) with the minimal model of glucose kinetics using data collected during insulin-modified intravenous glucose tolerance test (IVGTT) and made comparison with the standard non-linear regression analysis. After fasting overnight, subjects with newly presenting Type II diabetes according to World Health Organization criteria (n=65; 53 males, 12 females; age, 54±9 years; body mass index, 30.4±5.2 kg/m2; means±S.D.) underwent IVGTT consisting of a 0.3 g of glucose bolus/kg of body weight given at time zero for 2 min, followed by 0.05 unit of insulin/kg of body weight at 20 min. Bayesian inference was carried out using vague prior distributions and log-normal distributions to guarantee non-negativity and, thus, physiological plausibility of model parameters and associated credible intervals. Bayesian analysis gave estimates of SI in all subjects. Non-linear regression analysis failed in four cases, where Bayesian analysis-derived SI was located in the lower quartile and was estimated with lower precision. The population means of SI and SG provided by Bayesian analysis and non-linear regression were identical, but the interquartile range given by Bayesian analysis was tighter by approx. 20% for SI and by approx. 15% for SG. Individual insulin sensitivities estimated by the two methods were highly correlated (rS=0.98; P<0.001). However, the correlation in the lower 20% centile of the insulin-sensitivity range was significantly lower than the correlation in the upper 80% centile (rS=0.71 compared with rS=0.99; P<0.001). We conclude that the Bayesian hierarchical analysis is an appealing method to estimate SI and SG, as it avoids parameter estimation failures, and should be considered when investigating insulin-resistant subjects.

Activity budget of the regent honeyeater, Xanthomyza phrygia, in northern New South Wales

2001 ◽  
Vol 49 (6) ◽  
pp. 695 ◽  
Author(s):  
Damon L. Oliver
Keyword(s):  
New South ◽  
New South Wales ◽  
Breeding Birds ◽  
Foraging Efficiency ◽  
General Behaviour ◽  
Nectar Feeding ◽  
South Wales ◽  
Eastern Australia ◽  
Access To Food ◽  
Breeding Seasons

One of the suggested reasons for the decline of the endangered regent honeyeater, Xanthomyza phrygia, is a decrease in foraging efficiency and increase in competition for resources due to the loss, fragmentation and degradation of woodlands and other habitats in south-eastern Australia. This study investigated the general behaviour of regent honeyeaters over 26 months during breeding and non-breeding seasons at three distinct locations in northern New South Wales. At the three locations, regent honeyeaters spent, on average, 43–52% of total time foraging, 22–40% resting, 6–10% flying, and 1.8–2.9% involved in aggression. In the Bundarra–Barraba region, regent honeyeaters spent 24% of total time breeding. In 1994 in the Warrumbungle National Park, birds that fed primarily on nectar spent more time in aggressive acts than birds that fed mostly on lerp. In 1995 in the Bundarra–Barraba region, nectar-feeding birds spent significantly less time foraging and more time in aggressive acts than lerp-feeding birds. In 1994, regent honeyeaters at Howes Valley spent less time foraging and in aggression and greater time resting in the afternoon than at other times of the day. In 1996 in the Bundarra–Barraba region, birds spent the greatest amount of time in aggressive acts and the least amount of time resting in the morning compared with other times of the day. Non-breeding regent honeyeaters in the Bundarra–Barraba region spent more time foraging, less time resting and less time in aggression in 1995 than in 1996. Non-breeding birds, on average, chased other birds 12.5 times per hour compared with an average of 20 times for breeding birds. Regent honeyeaters displayed a behavioural repertoire and proportion of time in different activities that is typical of other honeyeaters. Overall, this study showed that regent honeyeaters are not consistently or frequently suffering from a lack of, or problems with access to, food.

scholarly journals Fluoride intake from regular and low fluoride dentifrices by 2-3-year-old children: influence of the dentifrice flavor

2007 ◽  
Vol 21 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Samanta Mascarenhas Moraes ◽  
Juliano Pelim Pessan ◽  
Irene Ramires ◽  
Marília Afonso Rabelo Buzalaf
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Good Alternative ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Care Givers ◽  
Fluoride Intake

This study evaluated the fluoride intake from dentifrices with different fluoride concentrations ([F]) by children aged 24-36 months, as well as the influence of the dentifrice flavor in the amount of fluoride ingested during toothbrushing. Thirty-three children were randomly divided into 3 groups, according to the [F] in the dentifrices: G-A (523 µgF/g), G-B (1,062 µgF/g) and G-C (1,373 µgF/g). Dentifrices A and B are marketed for children, while dentifrice C is a regular product. The amount of F ingested was indirectly obtained, subtracting the amount expelled and the amount left on the toothbrush from the amount initially loaded onto the brush. The results were analyzed by ANOVA, Tukey's test and linear regression analysis (p < 0.05). Children ingested around 60% of the dentifrice loaded onto the brush, but no significant differences were seen among the groups (p > 0.05). Mean daily fluoride intake from dentifrice for G-A, G-B and G-C was 0.022ª, 0.032ª and 0.061b mg F/kg body weight, respectively (p < 0.01). There was a strong positive correlation (r = 0.86, p < 0.0001) between the amount of dentifrice used and the amount of fluoride ingested during toothbrushing. The results indicate the need for instructing children's parents and care givers to use a small amount of dentifrice (< 0.3 g) to avoid excessive ingestion of fluoride. The use of low-[F] dentifrices by children younger than 6 years also seems to be a good alternative to minimize fluoride intake. Dentifrice flavor did not influence the percentage of fluoride intake.

scholarly journals P1421SERUM OSTEOPROTEGERIN LEVEL IS NEGATIVELY ASSOCIATED WITH BONE MINERAL DENSITY IN PATIENTS UNDERGOING HEMODIALYSIS

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Chia-Wen Lu ◽  
Jia-Sian Hou ◽  
Bang-Gee Hsu
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Regression Analysis ◽  
Linear Regression ◽  
Bone Mineral ◽  
Linear Regression Analysis ◽  
Hemodialysis Patients ◽  
Enzyme Linked Immunosorbent Assay ◽  
Mineral Density ◽  
Study Results

Abstract Background and Aims Osteoprotegerin, a potent osteoclast activation inhibitor, decreases bone resorption and positively affects bone mineral density (BMD). Our aim was to evaluate the relationship between BMD and fasting serum osteoprotegerin concentration in hemodialysis patients. Method Fasting blood samples were obtained from 75 chronic hemodialysis patients. BMD was measured by dual energy X-ray absorptiometry in lumbar vertebrae (L2-L4). Serum osteoprotegerin levels were measured using a commercial enzyme-linked immunosorbent assay. Results A total of 7 patients (9.3%) had osteoporosis and 20 patients (26.7%) had osteopenia in hemodialysis patients. Older age (p = 0.023), increased serum osteoprotegerin (p &lt; 0.001), urea reduction rate (URR, p = 0.021), Kt/V (p = 0.027), while decreased height (p &lt; 0.001), body weight (p &lt; 0.001), body mass index (BMI; p &lt; 0.001), and logarithmically transformed triglyceride (log-triglyceride, p = 0.020) was significantly correlated with low lumbar T-score cut-off points between groups (normal, osteopenia, and osteoporosis) in hemodialysis patients. Female patients had lower lumbar BMD than male hemodialysis patients (p = 0.002). Univariate linear regression analysis indicated lumbar BMD were positively correlated with height (p &lt; 0.001), body weight (p &lt; 0.001), BMI (p &lt; 0.001), log-triglyceride (p = 0.004), creatinine (p = 0.016), while negatively correlated with age (p = 0.001), alkaline phosphatase (p = 0.016), URR (p = 0.012), Kt/V (p = 0.013), and osteoprotegerin (p &lt; 0.001) among the hemodialysis patients. Multivariate forward stepwise linear regression analysis of the significant variables revealed that female hemodialysis patient (adjusted R2 change = 0.040; p = 0.003), body weight (adjusted R2 change = 0.126; p = 0.001), kt/V (adjusted R2 change = 0.024; p = 0.034) and osteoprotegerin (adjusted R2 change = 0.332; p &lt; 0.001) were the independent predictors of lumbar BMD values in the hemodialysis patients. Conclusion Our study results revealed that increased serum osteoprotegerin levels were independently associated with decreased BMD in the lumbar spine, and with increased risk of osteoporosis in hemodialysis patients.

Computed tomography measurements of intraocular structures of the feline eye

2019 ◽  
Vol 184 (21) ◽  
pp. 651-651 ◽  
Author(s):  
Shawn Sreenivasan Chandrakumar ◽  
Alex zur Linden ◽  
Mark Owen ◽  
Sarah Pemberton ◽  
Chantale L Pinard ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Weight ◽  
Regression Analysis ◽  
Retrospective Study ◽  
Optic Nerve ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Weak Correlation ◽  
Short Hair ◽  
Male Patients

Diagnostic imaging of the eye can be performed using ultrasonography, MRI or CT. This study describes the CT dimensions, volumes and radiodensities of presumed normal feline intraocular structures. Nineteen adult patients were included in this retrospective study. Fourteen males and five females were included, with domestic short hair (DSH) being the predominant breed. Length, volume and radiodensity values for the lens, anterior chamber, vitreous chamber and optic nerve were calculated as well as measurements of the optic nerve width. There was no significant correlation found on linear regression analysis comparing patient’s body weight with the various ocular measurements. Measurements of the lens, globe and optic nerve had significant differences (P<0.05) noted between the sexes, with males having increased values. These results may be skewed due to the large majority of male patients in the study. There was a weak correlation found between age and right eye (OD) optic nerve width, with an increase in the optic nerve width noted with increasing age. The findings of this study are a first step in establishing CT reference values for feline intraocular structure measurements.

scholarly journals Hubungan Ukuran-Ukuran Usus Halus Dengan Berat Badan Broiler

2008 ◽  
Vol 8 (2) ◽  
pp. 42-46 ◽  
Author(s):  
Sulaiman Ibrahim
Keyword(s):  
Body Weight ◽  
Regression Analysis ◽  
Small Intestine ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Strong Association ◽  
Broiler Chicks ◽  
Strongly Correlated ◽  
Simple Linear Regression

Association of small intestine measurements with body weight in broilersABSTRACT. The main objective of the present study was to investigate the association of small intestine measurements with body weight in broilers. Sixty five weeks old unsex broiler chicks (CP 707) were used. All birds were leg-banded and alloted to 60 cage units and than were fasted for 10 hours but water given. All birds were weighed individually and then sacrificed by neck vein bleeding. Small intestine was dissected individually to determine length and wide. All data were subjected to statistical analysis: correlation and simple linear regression, analysis of variance and t-test. The length of small intestine, duodenum, and jejunum/ileum were each strongly correlated with body weight: r = 0,88; P 0,01; r = 0,71; P 0,01; and r = 0,80, P 0,01 respectively. The wide of duodenum and jejunum/ileum were each closely correlated with body weight: r = 0,90; P 0,01; and r = 0,86; P 0,01 respectively. Results of study indicated that there were strong association between small intestine measurements and body weight in broilers.

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