scholarly journals The effects of breed, age, sex, and body weight on electrocardiographic parameters in military working dogs

2020 ◽  
Vol 13 (5) ◽  
pp. 1001-1004
Author(s):  
Wichaporn Lerdweeraphon ◽  
Surangkhana Thanwongsa ◽  
Suriya Youyod ◽  
Sermsawat Imsopa ◽  
Wootichai Kenchaiwong
Keyword(s):  
Body Weight ◽  
Labrador Retriever ◽  
German Shepherd ◽  
Significant Difference ◽  
Pr Interval ◽  
Working Dogs ◽  
Electrocardiographic Recordings ◽  
Electrocardiographic Parameters ◽  
Military Working Dogs ◽  
Labrador Retrievers

Aim: This study aimed to investigate the effects of breed, sex, age, and body weight on different electrocardiographic parameters in military working dogs (Labrador Retriever and German Shepherd). Materials and Methods: Electrocardiographic recordings (paper speed = 25 mm/s and calibration = 10 mm/mV) were performed to obtain all the standard bipolar limb leads (leads I, II, and III) and unipolar augmented limb leads (leads aVR, aVL, and aVF). A total of 16 Labrador Retrievers and 14 German Shepherds were restrained manually in the right lateral recumbency without any tranquilizer or anesthetic drug. Amplitude and duration of P, QRS, and T wave, PR and QT interval, mean electrical axis, and heart rate were measured in each recording. Results: There was no significant difference in electrocardiographic parameters across breed and sex. However, QRS duration tended to alter by breed (p<0.1) in Labrador Retrievers (0.04±0.005 s), which is lower than German Shepherds (0.05±0.005 s). PR interval was influenced by sex (p<0.1). PR interval was higher in females (0.13±0.005 s) than males (0.11±0.008 s). In addition, electrocardiographic values were not significantly affected by age and body weight, except that the amplitude of R wave was statistically affected by age (p<0.05). A correlation was found between the decrease in R wave amplitude and increase in age of dogs. Conclusion: Different electrocardiographic parameters were within the normal range. A significant effect of age was seen on amplitude of R wave. However, the effect of breed, sex, and body weight was not significant on different electrocardiographic parameters in Labrador Retriever and German Shepherd dogs.

Measurements of Vertical Ground Reaction Force in Jumping Dogs

1992 ◽  
Vol 05 (02) ◽  
pp. 44-50 ◽  
Author(s):  
D. A. Hulse ◽  
H. A. Hogan ◽  
Margaret Slater ◽  
M. T. Longnecker ◽  
Susan Yanoff
Keyword(s):  
Body Weight ◽  
Ground Reaction Force ◽  
Repeated Measures ◽  
Reaction Force ◽  
Force Plate ◽  
Vertical Ground Reaction Force ◽  
Significant Difference ◽  
Working Dogs ◽  
Vertical Ground ◽  
Military Working Dogs

SummaryThe purpose of this study was: to quantitate the peak vertical ground reaction force acting on the forelimbs of dogs as they landed after jumping an obstacle; to compare that force at three heights; and to evaluate factors that may affect vertical ground reaction force. Thirteen military working dogs were studied. A strain gauge force plate was used to measure force. Three measurements were recorded for each dog at each height. The means of the medians of the three forces for each dog at each height were compared using a repeated measures analysis of variance. Mean force at 63 cm was 986.9 ± 221.5 N, mean force at 79 cm was 1175.0 ±227.4 N, and mean force at 94 cm was 1366.1± 268.5 N. There was a significant difference in mean force at the three jump heights (p = 0.0002). The significance was unchanged when force was normalized for body weight. Statistical models were used to evaluate the effect of other independent variables. Factors that were found to effect force were body weight, breed, and sex of the dog. Further studies are needed to determine the clinical significance of these findings.Vertical ground reaction force was measured in thirteen dogs landing on a force plate after jumping an obstacle. Three readings were taken for each dog at each of three heights, and the mean vertical ground reaction force was compared. Force readings were significantly different at each height, increasing as height increased. Factors that were found to effect vertical ground reaction force were body weight, breed, and sex.

scholarly journals Dog–Human Play, but Not Resting Post-Learning Improve Re-Training Performance up to One Year after Initial Task Acquisition in Labrador Retriever Dogs: A Follow-On Study

Animals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1235
Author(s):  
Nadja Affenzeller
Keyword(s):  
Heart Rate ◽  
Labrador Retriever ◽  
Training Performance ◽  
General Linear Model Analysis ◽  
Initial Task ◽  
Significant Difference ◽  
Intervention Trials ◽  
One Year ◽  
Labrador Retrievers ◽  
Task Acquisition

Arousing and emotional situations can improve cognitive performance and the memorability of events. Recently, the enhancement of training performance in Labrador Retriever dogs through 30 min of dog–human play immediately after acquiring a novel task, when compared to a resting period, was demonstrated. This follow-on study used the same pseudo-randomized, counterbalanced, between-subject study design, and 11 Labrador Retrievers were re-trained in the identical two-choice discrimination paradigm after a period of 1 year. The playful activities group needed significantly less trials and made significantly less errors to successfully reach the re-training criterion (Mann–Whitney U test, critical value of U at p < 0.05 is 5, U = 5, Z = 1.73, p = 0.04 and U = 4.5, Z = 1.8, p = 0.03, respectively). Following model simplification of a multiple factor/covariate general linear model analysis, the type of intervention, the number of trials needed to re-learn the task after 24 h, the average heart rate during the intervention a year ago, and age were significantly correlated to the number of trials and errors needed to resolve the task. A significant difference due to intervention allocation (heart rate during the intervention, trials needed to re-learn the task after 24 h) between the groups was confirmed. Age did not significantly differ between the groups; nevertheless, the effects of ageing cannot be fully excluded, given the low sample size. No effects of the trainer and of the cortisol concentrations (of the previous year) were observed. This is the first evidence that post-training activity may influence memory up to 1 year after task acquisition.

DYNAMICS OF PROTEIN METABOLISM AND ACTIVITY OF AMINOTRANSFERASES OF DOGS BY ADDING DIHYDROQUERCETIN

2016 ◽  
Vol 1 (1) ◽  
pp. 6-8
Author(s):  
Полищук ◽  
Sergey Polishchuk ◽  
Молянова ◽  
Galina Molyanova
Keyword(s):  
Body Weight ◽  
The Body ◽  
Control Group ◽  
German Shepherd ◽  
Formalin Edema ◽  
Working Dogs ◽  
Healthy Dogs ◽  
Biochemical Indices ◽  
Experimental Group ◽  
Operational Capacity

The purpose of research is to improve business and operational capacity of the body through the use of dogs dihydroquercetin. The article presents the results of experiment by the effect of dihydroquercetin dynamics of biochemical indices of the dogs blood. Dihydroquercetin – it is an active antioxidant, natural scavenger of oxygen free radicals, hepatoprotector, having anti-inflammatory action due to limitations of the formalin edema and histamine, and inhibits the formation of serous fluid, painkillers, immunocorrelation properties. Due to the high complexing properties it displays the body of heavy metals, including radionuclides, helps to restore the blood vessels tone, normalizing the lipid levels and slows the progression of atherosclerotic plaques. Investigations were carried out in zonal center of the dog expert service GU MVD of Russia in Samara region with clinically healthy dogs, German shepherd breed, age 2-4 years with an average body weight of 30 kg in the background conditions and feeding, adopted by the enterprise. The dogs of the experimental group received dose dihydroquercetin 0.001 g/kg for body weight once a day during meals. When added to the basic diet, dihydroquercetined dogs of the experimental group shown the increase in indicators such as: total protein – by 11.5% (p&#60;0.01), albumin – to 12.8% (p&#60;0.01), AST 13.6% (p &#60;0.001), ALT – by 11% (p&#60;0.05), alkaline phosphatase in the – 12% (p&#60;0.01) relative to the control group. Based on the results, obtained during the experiment, we can conclude that the use of dietary supplements in the diet of dogs, dihydroquercetin allows biocorrection level of protein and enzymatic metabolism in the body, which improves service and working dogs potential.

scholarly journals Seroprevalence of West Nile and Usutu viruses in military working horses and dogs, Morocco, 2012: dog as an alternative WNV sentinel species?

2016 ◽  
Vol 144 (9) ◽  
pp. 1857-1864 ◽  
Author(s):  
B. DURAND ◽  
H. HASKOURI ◽  
S. LOWENSKI ◽  
N. VACHIERY ◽  
C. BECK ◽  
...  
Keyword(s):  
Natural Infection ◽  
Enzyme Linked Immunosorbent Assay ◽  
Test Results ◽  
West Nile Fever ◽  
West Nile ◽  
Significant Difference ◽  
Working Dogs ◽  
Serological Surveillance ◽  
High Level ◽  
Military Working Dogs

SUMMARYA serosurvey of 349 military working horses and 231 military working dogs was conducted in ten sites in Morocco in 2012. This survey revealed a high level of exposure of these animals to flaviviruses: seroprevalence rates of 60% in horses and of 62% in dogs were observed using a competitive West Nile virus (WNV) enzyme-linked immunosorbent assay (cELISA). Seroneutralization test results showed that the majority of cELISA-positive results were due to exposure to WNV. Further assays conducted in vaccinated horses with a DIVA (Differentiating Infected from Vaccinated Animals) test indicated that anti-WNV antibodies had been stimulated through WNV natural infection. Moreover, in both species, seroneutralization tests suggested an exposure to Usutu virus (USUV). Data analysis did not show any significant difference of cELISA seropositivity risk between horses and dogs. Dogs may thus represent an interesting alternative to equines for the serological surveillance of WNV or USUV circulation, especially in areas where equine vaccination precludes passive surveillance (based on the detection of West Nile fever cases) in horses.

A two-dimensional analysis of limb symmetry in the trot of Labrador retrievers

1999 ◽  
Vol 35 (6) ◽  
pp. 515-520 ◽  
Author(s):  
RL Gillette ◽  
CJ Zebas
Keyword(s):  
Labrador Retriever ◽  
Dimensional System ◽  
Two Dimensional ◽  
Trot Gait ◽  
Significant Difference ◽  
Two Dimensional System ◽  
Analysis System ◽  
The Right ◽  
Two Sides ◽  
Labrador Retrievers

Sixteen sound Labrador retriever and Labrador retriever cross-breed adult dogs were evaluated for symmetry while in a trot gait using a two-dimensional motion analysis system. Reflective markers were placed at selected joint centers. Each dog had the right side and then the left side videotaped while in the trot gait. The markers on the videotape were then digitized for analysis. There was no significant difference (p less than 0.05) between the movements of the two sides. It was concluded that the trot gait is symmetrical and that a two-dimensional system can be used to analyze gait in the dog.

High prevalence of intestinal zoonotic parasites in dogs from Belgrade, Serbia — Short communication

2008 ◽  
Vol 56 (3) ◽  
pp. 335-340 ◽  
Author(s):  
Aleksandra Nikolić ◽  
Sanda Dimitrijević ◽  
Sofija Katić-Radivojević ◽  
Ivana Klun ◽  
Branko Bobić ◽  
...  
Keyword(s):  
Intestinal Parasites ◽  
Giardia Duodenalis ◽  
Toxocara Canis ◽  
Stray Dogs ◽  
Significant Difference ◽  
High Prevalence ◽  
Working Dogs ◽  
Baseline Knowledge ◽  
Zoonotic Parasites ◽  
Military Working Dogs

To identify areas of risk for canine-related zoonoses in Serbia, the aim of this study was to provide baseline knowledge about intestinal parasites in 151 dogs (65 household pets, 75 stray and 11 military working dogs) from Belgrade. The following parasites, with their respective prevalences, were detected: Giardia duodenalis (14.6%), Ancylostomatidae (24.5%), Toxocara canis (30.5%), Trichuris vulpis (47.0%) and Taenia -type helminths (6.6%). Of all examined dogs, 75.5% (114/151) were found to harbour at least one parasite species. Of these, mixed infections with up to four species per dog occurred in 44.7% (51/114). Infections with all detected species were significantly higher (p < 0.05) in military working (100%) and stray dogs (93.3%) versus household pets (50.8%). Among all parasites, agents with zoonotic potential including Giardia , Ancylostomatidae and Toxocara were detected in 58.3% (88/151) of all examined dogs with a significant difference (p < 0.05) among the subgroups (100%, 62.7% and 46.2% for military working dogs, stray dogs and household pets, respectively). The high prevalence of zoonotic parasites registered in the dog population from a highly urban area in south-eastern Europe indicates a potential risk to human health. Thus, veterinarians should play an important role in helping to prevent or minimise zoonotic transmission.

scholarly journals Limb development in skeletally-immature large-sized dogs: A radiographic study

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254788
Author(s):  
Mariana Roccaro ◽  
Alessia Diana ◽  
Nikolina Linta ◽  
Riccardo Rinnovati ◽  
Marzia Freo ◽  
...  
Keyword(s):  
Body Weight ◽  
Limb Development ◽  
Time Windows ◽  
Morphological Variability ◽  
Labrador Retriever ◽  
Radiographic Examination ◽  
Skeletally Immature ◽  
German Shepherd ◽  
Radiographic Measurements ◽  
Breed Differences

Despite the extreme morphological variability of the canine species, data on limb development are limited and the time windows for the appearance of the limb ossification centres (OCs) reported in veterinary textbooks, considered universally valid for all dogs, are based on dated studies. The aim of this study was to acquire up-to-date information regarding the arm, forearm and leg bone development in skeletally-immature large-sized dogs from 6 weeks to 16 weeks of age. Nine litters of 5 large-sized breeds (Boxer, German Shepherd, Labrador Retriever, Saarloos Wolfdog, White Swiss Shepherd Dog) were included, for a total of 54 dogs, which were subject to radiographic examination on a bi-weekly basis. The appearance of 18 limb OCs was recorded and 14 radiographic measurements were performed; their relationship with age and body weight was investigated and any breed differences were analysed using different statistical non-parametric tests. The number of OCs present was significantly different at 6 and 8 weeks of age between the investigated breeds. The appearance of the OCs occurred earlier in the Saarloos Wolfdog, while the Labrador Retriever was the later breed. In Boxers and Labrador Retrievers, various OCs showed a delayed appearance compared to the data reported in the literature. The number of OCs was strongly and positively correlated to body weight. Breed differences were also observed in the relative increase of the measured OCs and were not limited to dogs of different morphotypes. Statistically significant differences were most frequently observed between Saarloos Wolfdogs and the other breeds. The OCs that showed a greater variability in their development were the olecranon tuber, the patella and the tibial tuberosity. Their increase was more strongly correlated with the dog’s age and body weight. Our data strongly suggest that differences in limb development exist in dog breeds of similar size and morphotype.

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