This work was carried out to predict the combining abilities, both general and specific, for performance traits and bodily yields of Serrasalmidae. Ninety-six 30-day-old juveniles were purchased from two commercial fish farms, 12 of each of the following eight genetic groups: pacu, pirapitinga, tambaqui, tambacu, tambatinga, patinga, paqui and piraqui. Six fish from each genetic group were grown in 500-L fibreglass tanks (two tanks per genetic group) until they were 495 days old. At the end of the growth period fish were weighed, subjected to morphometric analysis and processed to obtain their bodily yields. Two nuclear markers and one mitochondrial marker were used to confirm the identity of the animals. Combining abilities were obtained using the method proposed by Griffing in 1956 (Australian Journal of Biological Science, 4, 463-493) adapted to a mixed models analysis, environmental effects were estimated by the empirical best linear unbiased estimator method and genetic effects (general and specific combining abilities) were estimated with the empirical best linear unbiased predictor. Predictions of the combining abilities of advanced hybrids were obtained by the mixed models mixture method with normal distributions. Tambaqui showed higher general and specific combining abilities than the other groups for most of the variables, making it the most important genetic group. General combining ability makes a greater contribution to phenotypic variance than specific combining ability for most variables, indicating a predominance of genes with an additive effect in the control of evaluated traits. K E Y W O R D SColossoma macropomum, diallel crossbreeding, fish breeding, Piaractus brachypomum, Piaractus mesopotamicus, round fish
The objective of this work was to evaluate the association between morphometric variables and carcass characteristics in Pirapitinga. We used a thousand specimens of Pirapitinga with an average weight of 1,200 g, which were stunned, slaughtered, weighed, measured, and processed for morphometric and processing yield analysis, to obtain weights, carcass and fillet yields. Initially, the linearity of the variables was verified. Pearson's simple and partial correlation tests were performed between all metrics. Track analysis was performed considering the weights and yields of carcass and filet as dependent variables and the others as independent variables. Ridge regression models were used to eliminate the effects of multicollinearity among the independent variables. Observations showed that the simple correlations between body weights and yields were superior to the partial ones in terms of magnitude. The length and circumference of the specimens were the measures most linearly associated with weight, carcass weight and fillet with rib weight. As for carcass yield and fillet yield, linear correlation coefficients were low and not significant when associated with body weights.With the path analysis, we could observe significant positive correlations between the morphometric measurements for weight, carcass weight and fillet with rib weight.The standard length, body circumference and body circumference/body height ratio are the most correlated. The latter are the most important variables in the evaluation of body weights in Pirapitinga fish. They can serve as criteria for indirect selection in searching for fish with better carcass characteristics. As for fillet and carcass yields, the morphometric variables have not shown to be efficient for indirect selection. K E Y W O R D Sbreeding fish, correlation, multivariate, path analysis, round fish
A erliquiose e anaplasmose são hemoparasitoses que vem acometendo cães e gatos atendidos em clínicas e hospitais veterinários do Brasil. Essas doenças parasitárias têm como principal vetor o carrapato-marrom (Rhipicephalus sanguineus), principal ectoparasito que infesta cães e gatos, podendo até parasitar acidentalmente os seres humanos. Esse ixodídeo ao realizar o repasto sanguíneo em seus hospedeiros pode inocular bactérias do gênero Ehrlichia sp. e Anaplasma sp., as quais irão se disseminar por células do sistema circulatório, podendo gerar diversas patologias. Devido à complexidade clínica de alguns casos, o objetivo desse trabalho é relatar as alterações neurológicas em uma cadela com anaplasmose e erliquiose. Foi atendido pela equipe do Laboratório de Doenças Parasitárias dos Animais da Universidade Federal de Sergipe, campus do Sertão, uma cadela, errante, de cinco anos de idade, pesando 17 kg, com historico de alterações neurológicas há cerca de 30 dias. Ao exame físico foi observado ataxia, disfunção neuromotora e vestibular, tremores, vocalização, desidratação, mucosas hipocoradas, hiperqueratose nos coxins, petéquias no abdômen, além da presença de carrapatos. Exames hematológicos revelaram anemia, trombocitopenia, além de mórulas de bactérias E. canis e A. platys. Não foram detectados anticorpos do tipo IgM para o vírus da cinomose canina. Como tratamento terapêutico foi utilizado antibioticoterapia associado a suplementação de vitaminas e controle dos ectoparasitos.
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