V. Jaime De La Ossa ¹, Alejandro De La Ossa-Lacayo ², Donicer Montes Vergara ¹

Affiliations
1 Programa de Zootecnia, Universidad de Sucre, Sincelejo, Sucre, CO
2 Selvagua S.A.S, CO

Abstract

Objective: food preference in captivity was determined with a free choice of ants, fly larvae, and termites as a viable alternative for the suitable, easily-executed management of Dendrobates truncatus. Methods/Statistical Analysis: 6 dietary offerings were tested: larval fruit flies, 4 species of ants and 1 termite species, on a group of ten D. truncatus individuals held in captivity. The diet was calculated with an average animal weight of 1.75 g (1.3-2.0) and an offer of 12% body weight, which is equivalent to 2.1g/day in total. For the comparison between the diets, Friedman’s ANOVA was applied; to compare the body weights, a t-test was used; and for size, ANOVA and Tukey test were used. Findings: The diet with significant acceptance was termites, with greater preference than the fly larvae and ants. There was trophic plasticity and the concept of extreme specialization of diet in captivity was confirmed. Application: the results suggest that this species can be maintained ex situ with low cost and a wide availability of food resources, which is an important alternative for conservation programs especially since this species is endemic to Colombia.

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Alexander Perez Cordero ¹, Donicer Montes Vergara ¹, V. Jaime de la Ossa ¹

Affiliations
1 Departamento de Zootecnia, Universidad de Sucre, Sincelejo, CO

Abstract

Objective: This study evaluated in vitro the growth promotion activity of endophytic bacteria extracted from different tissues of Dichantium aristatum from livestock farms localized in the zone of Santiago de Tolú, Sucre Department, Colombia. Methods/Statistical Analysis: Endophytic bacteria from different tissues were isolated, and the population was determined in CFU/g of tissue. Each isolated morphotype was used to quantitatively and qualitatively evaluate the BNF, PS, siderophore and indole acetic acid production in vitro. The bacteria that showed this activity were sequenced for identification for sequencing of the 16S rDNA gene for eubacteria. 62 morphotypes of endophyte bacteria from different Angleton pasture tissues were isolated, of which 28 had siderophore production, five ammonium ion production, 12 soluble phosphates and six indole acetic acid in mg/L. The population of these bacteria varied, from 3.210 × 10⁶ ± 1.2 × 10⁸ CFU/g of tissue, with higher quantity found in the Angleton pasture ischolar_mains. Findings: The results of the sequencing showed the presence of a high percentage of similarity with the bacterial species Serratia marcescens, Enterobacter cloacae and Bacillus cereus, presenting phosphate solubilization, reduction of N² to ammonium, and production of indole acetic acid and siderophores. Application: The findings of this study constitute important alternatives to mitigate the impact of the continuous use of pesticides in the production agricultural; the use of endophytic bacteria associated with vegetable species with the ability to produce multiple benefits has gained attention. Studies have shown the goodnesses of plant growth promoting-bacteria as an alternative for obtaining biofertilizers, with the ability to stimulate the growth and productivity of plants, making it are possible to improve the yield of crops.

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Jaime De La Ossa-V ¹, Donicer Montes Vergara ¹, Alexander Perez-Cordero ¹

Affiliations
1 Programa de Zootecnia, Universidad de Sucre, CO

Abstract

Objective: To document the presence of Milvago chimachima in the urban center of Santiago de Tolu, Sucre, Colombia, as a regular inhabitant, while determining its density and area of action, taking notes on its feeding habits and exploring reproductive and population aspects for the two seasons: rainy and dry. Methods/Statistical Analysis: This study was carried out in the urban area of Santiago de Tolu, Sucre Department, Colombia in the southern region of the Colombian Caribbean. The observations was made during six months of the year 2017, three months in the dry season and three months in the rainy season; two areas were selected, each with 24 ha and four sighting points were established using the synchronized total sampling method, with a total sampling effort of 384 hours. Variance analysis and Duncan’s test was applied and the density was determined directly. Findings: The population density was between 0.333 and 0.416 Ind/ ha for both adults and juveniles, with significant differences for the area and season. The area of action was between 2.4 and 3.0 ha/Ind and the M. chimachima feeding habits agreed with that recorded for the species, which is classified as an opportunistic, generalist scavenger hunter. Interspecific coprophagy has been reported. Application: The findings of this study expand the knowledge on the ecology and behavior of this falconiform species with urban occurrence and a wide presence in the Colombian Caribbean.

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Donicer Montes Vergara ¹, Jaime De La Ossa-V ², Alexander Perez-Cordero ³

Affiliations
1 Grupo de investigación Reproducción y Mejoramiento Genético Animal, CO
2 Grupo de investigación Biodiversidad Tropical, CO
3 Grupo de investigacion en Bioprospeccion Agropecuarias Universidad de Sucre, Sincelejo, CO

Abstract

Objectives: To evaluate some growth characteristics Birth Weight (BW), Adjust Weaning Weight (AWW) and Daily Weight Gains (DWG) between birth and weaning of bovine females managed under grazing conditions in the Mojana subregion of the department of Sucre Colombia. Methods / Statistical Analysis: Made an analysis of the information of the productive records of the offspring born from the year 2017 – 2018 in 3 livestock farms. The genetic analysis belonged to the race Zebu, F1 Romo x Zebu and F1 Simmental x Zebu was done. The statistical model used included the effects of year of birth, weaning, farm, racial group, paternal and maternal race. For the analysis, the minimum squares method was used by the PROC GLM procedure, contained in the Statistical Analysis System (SAS). Tukey’s multiple comparison test was performed to determine differences between means, when these differed statistically in the analysis of variance. Findings: The mean for BW, AWW and DWG were 27.5 ± 3.1; 155.5 ± 3.2 kg and 485, ±06 gr/day respectively. The effects of racial group, paternal type and farm were significant (p≤0.05; p≤0.01). On the contrary, the year of birth, as well as the year of adjusted weaning, did not significantly affect (p>0.05) the characteristics analyzed. Application: There are differences between the genetic groups for the analyzed characteristic, which can be used in animal genetic improvement programs in the farms analyzed, in order to achieve increases in the productive variable of growth.

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