Evaluación del crecimiento y sobrevivencia de la tilapia negra (oreochromis sp.) tras infección con pseudomonas y vibrios

Abstract

This study evaluated the impact of bacterial infections by Pseudomonas spp. and Vibrio spp. on the growth and survival of Black Tilapia (Oreochromis sp.) under controlled laboratory conditions. Experimental tests were conducted to measure growth rate, survival, and the presence of bacterial colonies in the organisms and in the culture water. The results demonstrated that bacterial infections significantly decrease the growth rate and increase mortality in tilapia, highlighting the need for effective management and control strategies. Additionally, the efficacy of biological and chemical treatments in reducing the pathogenic load was explored, improving the health outcomes of infected fish. This study contributes to the understanding of Black Tilapia's response to bacterial infections, providing a solid foundation for the development of more sustainable and effective aquaculture practices.The present study evaluated the effectiveness of different treatments on tilapia survival over a four-week period, using a one-way ANOVA analysis. The results indicated that although there was variability among the treatments, these differences were not statistically significant in any of the weeks evaluated (p > 0.05). A trend towards significance was observed in the second week (p = 0.057), suggesting that some treatments may be influencing tilapia survival, although not with sufficient strength to be conclusive. Post hoc analyses using Tukey HSD confirmed the absence of significant differences between treatments, grouping the treatments into homogeneous subsets each week. These results suggest that while the treatments may be minimally affecting survival, there is insufficient evidence to assert a statistically significant influence.This study also evaluated the impact of various treatments on the weight of organisms over a four-week period, using a one-way ANOVA design to analyze the data collected weekly. The results revealed that although no significant differences were observed in the first week (p > 0.05), from the second week onwards, a statistically significant influence of the treatments on the weight of the individuals was evident (p < 0.05), with a growing effect in subsequent weeks. Week four showed highly significant differences, highlighting an accumulative effect of the treatments. Post hoc tests (Tukey HSD) suggest that the treatments begin to differentiate markedly in terms of effectiveness, with treatment D emerging as the most effective towards the end of the study period. These findings suggest that the timing and nature of the treatment are crucial for optimizing organism growth, providing a basis for future research in optimizing management strategies in aquaculture production systems. Further research is recommended to explore whether increasing the duration or varying the treatments could lead to more conclusive results.