Growth curve of female collared peccaries (Pecari tajacu) raised in captivity in the Brazilian Amazon Region

Abstract

This work aims to determine the most suitable nonlinear model to describe the growth of female collared peccaries (Pecari tajacu). The monthly records of the weight of 10 captive female collared peccaries over a period of two years in the Brazilian Amazon Region were used. The growth models used were the Von Bertalanffy, Brody, Gompertz and Logistic. The parameters were estimated by using the NLIN procedure from the SAS application. The criteria used to verify the adjustment of the models were: asymptotic standard deviation (ASD); coefficient of determination (R 2 ); average absolute residual deviation (ARD) and the asymptotic rate (AR). The Brody model and the Logistic model estimated the highest (19.44kg) and the lowest (19.18kg) asymptotic weight (A), indicating the lowest (0.0070kg/day) and the highest (0.0121kg/day) maturation rate (K). These results and the coefficients of phenotypic correlation that varied from -0.75 and -0.47 confirmed the antagonistic nature between these parameters. The Brody model estimated the lower value for ARD, a limiting factor for describing the lowest value for AR through this model. The Brody model showed the best adjustment for AR, although the other models also showed a suitable adjustment to the weight data of said species/gender. Based on the AR obtained in this work, the Brody model is recommended for adjusting the growth curve of the female collared peccaries. Depending on the estimated values, especially for K, this trait can be included in a selection index.Keywords: nonlinear models, asymptotic weight, growth rate RESUMO Com o objetivo de ajustar modelos não-lineares, foram utilizados registros mensais do peso de 10 fêmeas de cateto (Pecari tajacu) coletados durante dois anos, no criatório do campo experimental Álvaro

Accelerating Capoeira Regeneration on Degraded Pastures in the Northeastern Amazon by the Use of Pigs or Cattle

“…Another promising alternative animal species for the desired ecological effects is perhaps the Collared Peccary (Pecari tajacu L., Tayassuidae, Portuguese: cateto) that might provide even better ecological effects and production features than domestic pigs [68,69]. However, as there are almost no practical experiences with the species on-farm, and animals can cause serious damage in case of escapes in the agro-scapes, or can even be dangerous for people, this idea was disregarded for this experiment.…”

“…However, we would like to recommend research upon this species, hypothesizing that P. tajacu might create higher proportions of small gaps in weed canopies (juquiras) than domestic pigs, while taking better advantage of the nutrient-poor natural resources on degraded tropical pastures than the Landrace pigs. It assumedly will receive higher prices on local markets, and will be better adapted to the ecological conditions of the northeastern Amazon [68,69].…”

Comparing Post-Partum Growth by Body Weight between Sex and Litter Size of Agouti (Dasyprocta Leporina) Offspring from Birth to 360 Days Old

“…and the Logistic is asymmetric [4]. The reproduction of wild fauna in ex situ conditions play a critical role in animal conservation, production and utilization [5]. Hence this study lends itself to securing food for rural communities, creating employment and generating new information for science.…”