Evaluacion de la tasa de consumo de oxigeno de Colossoma macropomum en relacion al peso corporal y temperatura del agua

Abstract

Evaluación de la tasa de consumo de oxígeno de (5x3x3), utilizando un respirómetro de 20 L y una bomba de recirculación de agua. Las mediciones del CO fueron realizadas cada 5 min mediante el uso de un oxímetro digital. Los resultados indican que el CO mantiene relación directa con la temperatura del agua e inversa con el peso corporal de los organismos (P < 0,05). Las regresiones entre las variables independientes y el CO se ajustaron a ecuaciones potenciales: CO = 2844,9 P -0,734, CO = 2555,9 P -0,624 y CO = 1945,4 P -0,507 a 21, 26 y 31°C respectivamente; donde P se expresa en kg, obteniéndose altos coeficientes de correlación y determinación. La ecuación resultante del análisis multivariado de regresión lineal múltiple fue: CO = 4,839 -(0,708* P) + (9,106* T). Los resultados ofrecen información para estimar la capacidad de un ambiente acuícola en base a la demanda de oxígeno de C. macropomum, aportando al desarrollo de una acuicultura con mayor sustento técnico. Palabras clave: Colossoma macropomum, consumo de oxígeno, peso, temperatura, respirómetro, acuicultura. Evaluation of oxygen consumption rate of Colossoma macropomum regarding the body weight and water temperatureABSTRACT. Colossoma macropomum is a species in the Amazon region pertaining to the greatest diversity of freshwater fish family Characidae. At the laboratory level, the rate of oxygen consumption of (CO) was determined in a routine metabolism at different body weights: 40, 60, 90, 140 and 250 g (expressed per unit of body mass) and water temperature of 21, 26 and 31°C. The experiment was design as a completely randomized factorial arrangement (5x3x3), using a respirometer of 20 L and a water recirculation pump. CO measurements were recorded every 5 min by using a digital oximeter. It was shown that the CO maintains interaction with body weight (P) and water temperature (T) (P < 0.05). The results indicate that CO remains directly related to water temperature and inversely with body weight of the organisms. The regression between independent variables and CO were adjusted to potential equations: CO = 2844.9 P -0.734, CO = 2555.9 P -0.624 and CO = 1945.4 P -0.507 for 21, 26 y 31°C respectively; where P expressed in kg, yielding high coefficients of correlation and determination. The resulting equation of the multivariate regression analysis was: CO = 4.839 -(0.706* P) + (9.106* T). The results provide information to estimate the capacity in an aquaculture environment based upon the oxygen demand of C. macropomum, contributing to the development of aquaculture with greater technical support.

Effect of the water exchange rate in a recirculation aquaculture system on growth, glucose and cortisol levels in Oreochromis niloticus

“…The temperature variable oscillated below the optimal value of 28ºC (Azaza et al 2008), without presenting significant differences between the treatments during the three stages of development (juvenile, juvenile, and adult). The dissolved oxygen concentration had a decrease throughout the development stages, being that higher total biomass in the tanks leads to higher oxygen consumption (Valbuena-Villareal et al 2006, Tomalá et al 2014; however, within each development stage (juvenile, juvenile, and adult), the treatments did not show significant differences. So, it can be inferred that the dissolved oxygen did not limit the development of the fish.…”

Relaciones talla-peso y factor de condición de la tilapia Orecochromis niloticus en cinco cuerpos de agua del estado de Jalisco, México

“…Además, en bajas concentraciones de oxígeno disuelto los peces son más susceptibles a enfermedades, ya que la actividad metabólica se ve limitada (Tomalá, Chavarría y Escobar, 2014). En los lagos, los problemas se agravan al considerar la condición endorreica, ya que la única entrada de agua al sistema es de naturaleza pluvial (por lluvia), mientras que su única salida es por evaporación, lo que le confiere una dinámica de dilución y concentración temporal, aunque ligada al ciclo anual de precipitación (Bernal-Brooks, 2002).…”

Two sides of a coin: Effects of climate change on the native and non-native distribution of Colossoma macropomum in South America

“…macropomum [ 61 ]. A study found that individuals with a body weight above 250 g have tolerance to low oxygen concentrations due to high temperatures [ 62 ]. In addition, the ability of C .…”