|
|
|
|
|
| Marinho,Kedma Nayra da Silva; Freitas,Alfredo Ribeiro de; Falcão,Alencariano José da Silva; Dias,Francisca Elda Ferreira. |
| Growth curves of Nellore cows were estimated by comparing six nonlinear models: Brody, Logistic, two alternatives by Gompertz, Richards and Von Bertalanffy. The models were fitted to weight-age data, from birth to 750 days of age of 29,221 cows, born between 1976 and 2006 in the Brazilian states of Acre, Amapá, Amazonas, Pará, Rondônia, Roraima and Tocantins. The models were fitted by the Gauss-Newton method. The goodness of fit of the models was evaluated by using mean square error, adjusted coefficient of determination, prediction error and mean absolute error. Biological interpretation of parameters was accomplished by plotting estimated weights versus the observed weight means, instantaneous growth rate, absolute maturity rate, relative instantaneous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Maturity rate; Modeling. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900006 |
| |
|
|
| Santos,Helcileia Dias; Galvão,Samara Rocha; Dias,Francisca Elda Ferreira; Ribeiro,Taiã Mairon Peixoto; Negreiros Filho,Osmar; Sousa,Sebastiana Adriana Pereira; Minharro,Silvia. |
| ABSTRACT: A direct search for parasites were used as the diagnostic test to determine the frequency of Leishmania spp. infection in dogs ( Canis lupus familiaris ) under veterinary clinical care in the city of Araguaína, Tocantins, Brazil. For this approach, lymph node cell samples were collected using needle aspiration from 649 dogs of different breeds and ages. Two hundred and sixty four (40.7%) dogs tested positive for amastigote forms of Leishmania spp. Furthermore, 202 (76.5%) dogs that tested positive showed some clinical sign of disease, while 62 (28.4%) dogs were asymptomatic. Dogs <2 years old or those that lived alongside poultry species in peri-domicile areas had a greater chance of infection (P<0.05). Our results revealed the importance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Visceral leishmaniasis; Cytodiagnosis; Risk factors; Prevention and control. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300501 |
| |
|
|
|
