Navegando por Assunto "Canis familiaris"

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Acesso aberto (Open Access)
Formação de classes funcionais em cães domésticos (Canis familiaris)
(Universidade Federal do Pará, 2009-02) SOUZA, Liane Dahás Jorge de; SOUZA, Carlos Barbosa Alves de; http://lattes.cnpq.br/1264063598919201
The present study investigated the possibility of teaching two domestic dogs (Canis familiaris) to respond adequately to two classes of three stimuli (boxes with pieces of food when having S+ function) through a procedure of successive changes of simple discrimination (SCSD). Sessions were carried out in a room in which two, four or six wooden boxes were placed side by side. Initially, the subjects responded to two stimuli (a positive [S+] and another negative [S-]) for session, until four of the six boxes appeared with both of the functions. In the following phase, the four boxes were presented together, whith two boxes of a class functioning as S+ and the other two, as S-. Changes were performed until the subjects reached the criteria of learning in 11 out of 12 sessions. After that, the subjects were trained to respond to the two boxes that had not been used before, and then, the training with all six boxes was initiated. The test took place after a session of change with four boxes in which the two remaining boxes had been re-inserted in the experimental room. Having negative results in this test, training of SCSD was conducted with the six boxes, after which the test was remade. Both of the subjects had adequately responded to all the trials. Other five tests were conducted with the others boxes, in the same format of the first test. One of the subjects adequately responded to two of these five tests and the other to three of them. It is argued about the effect of the emphasis in the visual discrimination and the use of fixed positions of the boxes on the performance of the subjects.
Acesso aberto (Open Access)
Relação entre a biometria ultra-sonográfica em modo B do bulbo ocular e os diâmetros fronto occiptal e bizigomático em Canis familiaris
(2009-04) CARVALHO, Poliana Silva Beserra; SALES, Gustavo Aguiar; SANTANA, Expedito Junior de Matos; MIRANDA, Stefânia Araújo; BRITO, Adriel Behn de; NIKOLAK, Elizabete; DOMINGUES, Sheyla Farhayldes Souza
In the experiment 31 healthy mongrel dogs, 8 months to 7 years of age, were used, 10 males and 21 females, weighing 1.5-28 kg. Initially, fronto-occipetal (FOD) and bizigomatic (BZD) diameters were measured using a caliper. The ophthalmologic transpalpebral B-mode ultrasonography (US) was performed to measure the ocular bulbi structures, as follows: The cornea thickness (D1), distance between cornea and anterior lens capsule (D2), distance between cornea and posterior lens capsule (D3), lens thickness (D4), lens diameter (D5), lens area (D6), distance between posterior lens capsule and retina (D7), distance between anterior lens capsule and retina (D8), and the distance between cornea and retina (D9). Except for D4, there were effect of FOD and BZD on the measures of the internal structures of BO. The Lineal Regression Analysis between the measures of the internal oculars structures and DFO and DBZ were significant for D1, D2, D3, D4, D5, D6, D7, D8 and D9.
Acesso aberto (Open Access)
Triplex Doppler da artéria renal e a relação entre a ecobiometria dos rins com distância atlanto-coccígea e altura em Canis familiaris
(2009-10) SANTANA, Expedito Junior de Matos; CARVALHO, Poliana Silva Beserra; BRITO, Adriel Behn de; MIRANDA, Stefânia Araújo; NIKOLAK, Elizabete; DOMINGUES, Sheyla Farhayldes Souza
The aim of this paper was to establish the relation between the kidney ecobiometry with atlanto-coccyges distance (ACD) and height (H) in adult healthy dogs, to obtain normality parameters for assessment of renal size and volume, as well as establish reference values to evaluate kidney blood perfusion by the resistivity index (RI) and pulsatility index (PI) of main renal artery. The study was applied at 22 adult dogs, 11 males and 11 females. Previously, the DAC and H of all animals were measured. For ultrasonographic examination, the ultra-sound system HDI 4000 PHILIPS equipped with a multi-frequency microconvex transducer, Color Doppler and Spectral Doppler devices was used. The animals were placed into right or left lateral decubitus position, in agreement with the kidney to be assessed. The longitudinal (LD) and dorsoventral diameters (DVD) of kidney were measured in longitudinal plane, and the transverse diameter (TD) was determined in transversal section. The renal volume (V) was automatically calculated by the ultrasound software. With Triplex Doppler, the RI and PI of right and left main renal arteries were obtained. All data were represented in mean ± SEM. Linear regression analyses were performed with renal LD, DVD, TD and V as dependent variable, and ACD and H as independent variable. RI and PI were compared between right and left renal arteries with Student's t-test. The LD, DVD, TD (cm) and V (ml) mean measurements for the left and right kidneys were: 5.24±0.27, 3.07±0.15, 3.07±0.9, 28.01±3.4 and 4.50±0.19, 2.88±0.14, 2.71±0.15, 21.27±2.6. All regression analyses were significant for the intercept and regression coefficient (P<0.01). There were statistical differences on RI and PI means between right and left renal arteries (P=0.001). The RI and PI means of left and right renal artery obtained were: 0.62±0.08 and 1.34±0.18; 0.70±0.06 and 1.62±0.13. The data obtained in the present paper can be used as parameters for evaluation of the renal size, volume and perfusion in adult dogs.