Efecto de la densidad de cultivo y la temperatura sobre la tasa de consumo de oxígeno en juveniles de lenguado chileno (Paralichthys adspersus) (Steindachner, 1867)
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2000
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es
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Universidad Andrés Bello
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Resumen
El nivel de oxígeno disuelto en el agua puede resultar ser un regulador metabólico esencial
para organismos oxi- independientes, es decir, una baja en los niveles de oxígeno disuelto,
implica una reducción en el consumo de esta molécula. Factores ambientales como la
temperatura del medio, o de cultivo como el nivel de biomasa, influyen directamente sobre
el consumo de oxígeno por parte del pez, derivando por ende en modificaciones a nivel
metabólico.
En el presente estudio, se determina el efecto de la Densidad de Cultivo y la Temperatura
en el Consumo y la Tasa de Consumo de Oxígeno para el Lenguado Paralichthys
adspersus. La primera experiencia se realizó a tres densidades diferentes (9-14,5-20 kg/m2
),
considerando para la Densidad una escala a nivel productivo. Para las experiencias
realizadas con la variable Temperatura, se seleccionaron tres ( 10-14-l8°C) que fueran
representativas de las del medio donde estos peces habitan.
El proceso de experimentación se realizó en un oxigenómetro de tipo dinámico, que emula
las condiciones de cultivo para esta especie.
Finalmente los resultados obtenidos concuerdan con los de expenenc1as anteriores de
respirometría, donde se señala que la Temperatura y la Densidad de Cultivo son factores
críticos en la regulación del consumo de oxígeno por parte del pez.
The level of dissolved oxygen in the water can turn out to be an essential metabolic regulator for organisms oxi - independent, that is to say, a drop in the levels of dissolved oxygen, implies a reduction in the consumption of this molecule. Environmental factors as the temperature, or cultivation as the level of biomass, they influence directly on the oxygen consumption on the part ofthe fish, deriving in modifications at metabolic level. Presently study, is determined the effect ofthe stocking Density and the Temperature in the Consumption and the Rate of Consumption of Oxygen for the flat fish Paralichthys adspersus. The first experience was carried out to three different densities (9-14,5-20 kg/m2), considering for the Density a scale at productive level. For the experiences caá ied out with the variable Temperature, three were selected (10-14-18°C) that were representative of those of the means where these fish inhabit. The experimentation process was carried out in a dynamic type of respirometer, that emulates the cultivation conditions for this species. Finally the obtained results agree with those of experiences previous of respirometry, where it is pointed out that the Temperature and the Density of Cultivation are critical factors in the regulation of the oxygen consumption on the part of the fish.
The level of dissolved oxygen in the water can turn out to be an essential metabolic regulator for organisms oxi - independent, that is to say, a drop in the levels of dissolved oxygen, implies a reduction in the consumption of this molecule. Environmental factors as the temperature, or cultivation as the level of biomass, they influence directly on the oxygen consumption on the part ofthe fish, deriving in modifications at metabolic level. Presently study, is determined the effect ofthe stocking Density and the Temperature in the Consumption and the Rate of Consumption of Oxygen for the flat fish Paralichthys adspersus. The first experience was carried out to three different densities (9-14,5-20 kg/m2), considering for the Density a scale at productive level. For the experiences caá ied out with the variable Temperature, three were selected (10-14-18°C) that were representative of those of the means where these fish inhabit. The experimentation process was carried out in a dynamic type of respirometer, that emulates the cultivation conditions for this species. Finally the obtained results agree with those of experiences previous of respirometry, where it is pointed out that the Temperature and the Density of Cultivation are critical factors in the regulation of the oxygen consumption on the part of the fish.
Notas
Tesis (Ingeniero en Acuicultura)
Palabras clave
Cultivo del lenguado, Chile