Simplified strong ion difference approach to acid–base balance in healthy foals          下载免费PDF全文

Judit Viu DVM  PhD  Lara Armengou DVM  PhD  DECEIM  José Ríos BSc  Anna Muñoz DVM  PhD  Eduard Jose‐Cunilleras DVM  PhD  DACVIM  DECEIM 《Journal of Veterinary Emergency and Critical Care》2016,26(4):549-558

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Tear ferning test in horses and its correlation with ocular surface evaluation          下载免费PDF全文

Laura R. Silva  Anderson F. Gouveia  Cleyber J. T. de Fátima  Letícia B. Oliveira  Janildo L. Reis Jr.  Renato F. Ferreira  Concepta M. Pimentel  Paula D. Galera 《Veterinary ophthalmology》2016,19(2):117-123

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Effects of gossypol from cottonseed cake on the blood profile in sheep     

Antônio Carlos Lopes Câmara  André Menezes do Vale  Cláudio Roberto Scabelo Mattoso  Marília Martins Melo  Benito Soto-Blanco 《Tropical animal health and production》2016,48(5):1037-1042

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Oat and ryegrass silage for small-scale dairy systems in the highlands of central Mexico     

Maria Danaee Celis-Alvarez  Felipe López-González  Carlos Galdino Martínez-García  Julieta Gertrudis Estrada-Flores  Carlos Manuel Arriaga-Jordán 《Tropical animal health and production》2016,48(6):1129-1134

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Climatic conditions,twining and frequency of milking as factors affecting the risk of fetal losses in high-yielding Holstein cows in a hot environment     

Miguel Mellado  Ricardo López  Ángeles de Santiago  Francisco G. Veliz  Ulises Macías-Cruz  Leonel Avendaño-Reyes  José Eduardo García 《Tropical animal health and production》2016,48(6):1247-1252

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Indigenous sheep breeds in Brazil: potential role for contributing to the sustainability of production systems     

Edson Luis de Azambuja Ribeiro  Eliel González-García 《Tropical animal health and production》2016,48(7):1305-1313

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A quantitative approach to analysing cortisol response in the horse          下载免费PDF全文

C. Ekstrand  C. Ingvast‐Larsson  L. Olsén  M. Hedeland  U. Bondesson  J. Gabrielsson 《Journal of veterinary pharmacology and therapeutics》2016,39(3):255-263

The cortisol response to glucocorticoid intervention has, in spite of several studies in horses, not been fully characterized with regard to the determinants of onset, intensity and duration of response. Therefore, dexamethasone and cortisol response data were collected in a study applying a constant rate infusion regimen of dexamethasone (0.17, 1.7 and 17 μg/kg) to six Standardbreds. Plasma was analysed for dexamethasone and cortisol concentrations using UHPLC‐MS/MS. Dexamethasone displayed linear kinetics within the concentration range studied. A turnover model of oscillatory behaviour accurately mimicked cortisol data. The mean baseline concentration range was 34–57 μg/L, the fractional turnover rate 0.47–1.5 1/h, the amplitude parameter 6.8–24 μg/L, the maximum inhibitory capacity 0.77–0.97, the drug potency 6–65 ng/L and the sigmoidicity factor 0.7–30. This analysis provided a better understanding of the time course of the cortisol response in horses. This includes baseline variability within and between horses and determinants of the equilibrium concentration–response relationship. The analysis also challenged a protocol for a dexamethasone suppression test design and indicated future improvement to increase the predictability of the test.  相似文献   

Anti-predator behaviour of adult red-legged partridge (Alectoris rufa) tutors improves the defensive responses of farm-reared broods     

C. Sánchez-García  M.E. Alonso  E.J. Tizado  J. A. Pérez  J. A. Armenteros  V. R. Gaudioso 《British poultry science》2016,57(3):306-316

1. The aim of this work was to improve natural anti-predator behaviour of farm-reared gamebirds.

2. We evaluated the anti-predator behaviour of reared red-legged partridge Alectoris rufa chicks kept in brooder houses in large groups (>350 chicks), trained and not trained by parent red-legged partridges acting as experienced tutors.

3. The experiment consisted of two conditioned tests (a raptor model and a human) and two control tests, which were conducted during three consecutive phases of life (1–4, 15–17 and 30–32 d after hatching). The motor anti-predator behaviour, its duration, the intensity of response in chicks and alarm calls elicited by adults were recorded.

4. Tutors elicited aerial alarm calls (76% of tests) and showed prolonged crouching (59% of tests) in response to the raptor model whereas uttering the ground alarm call (73% of tests) and showing vigilance behaviour (78% of tests) was the main pattern during the human test.

5. Trained and not trained chicks showed similar motor behaviour in response to the raptor model (crouching) and the human test (escaping), but frequency of strong responses (all chicks responding) from chicks trained with tutors was double that of chicks trained without them, and chicks trained with tutors showed a higher frequency of long responses (41–60 s).

6. This study indicates that anti-predator training programmes before release may improve behaviour of farm-reared partridges which may confer benefits to survival of birds.

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Spontaneous poisoning by Hovenia dulcis in dairy cattle in Southwest Parana,Brazil     

Fabricio Bernardi  Marina Gabriela Possa  Mayane Faccin  Leonardo Gruchouskei  Carlos Eduardo Fonseca-Alves  Fernando Pípole  Luciana Retz de Carvalho  Fabiana Elias 《Tropical animal health and production》2016,48(1):211-214

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Canine fetal echocardiography: correlations for the analysis of cardiac dimensions     

Amália Turner Giannico  Elaine Mayumi Ueno Gil  Daniela Aparecida Ayres Garcia  Marlos Gonçalves Sousa  Tilde Rodrigues Froes 《Veterinary research communications》2016,40(1):11-19

The aim of this study was to develop regression models for correlation of canine fetal heart development with body size to characterize normal development or suggest cardiac anomalies. Twenty clinically healthy pregnant bitches, either brachycephalic and non-brachycephalic, were examined ultrasonographically. Transabdominal fetal echocardiography was conducted every 4 days from the beginning of cardiac chambers differentiation until parturition. Ten cardiac parameters were measured: length, width and diameter of the heart; heart area; left and right ventricular dimensions; left and right atrial dimensions; and aortic and pulmonary artery diameter. Femoral length, biparietal diameter and abdominal cross-sectional area were also recorded. Regression equations were developed for each parameter of fetal body size, and linear and logarithmic models were compared. The model with the highest correlation coefficient was chosen to produce equations to calculate relative dimensions based on the correlations. Only the left-ventricular chamber differed between the two racial groups. Biparietal diameter was the independent parameter that produced the highest correlation coefficient for the most fetal cardiac dimensions, although good correlations were also observed using femoral length and abdominal cross-sectional area. Heart width and heart diameter were used as surrogates of cardiac development, as these measurements showed the best statistical correlation. Quantitative evaluation of fetal cardiac structures can be used to monitor normal and abnormal cardiac development.  相似文献