1000 resultados para Estrés
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Potassium, like nitrogen, it constitutes an essential element for growth, development and production of cotton crops. Moreover, these elements are directly related to fiber formation and when provided in suitable doses, influences its quality. The aim of the experiments was to evaluate the influence of potassium on biometric parameters, yield and quality of cotton fibers. For this purpose, plants of the cultivar Delta opal were grown in a greenhouse with altered potassium fertilization, simulating K deficiency and two overdoses. During the different phenological stages, biometric variables were analyzed including the production of fibers and their qualitative parameters. The sub-dose and the overdoses treatments of K, changed all the evaluated parameters, demonstrating the importance of potassium fertilizer on them.
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Incluye Bibliografía
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Se comprueba, a qué rango de frecuencias sonoras (Hz) se produce el mayor nivel de estrés en el pez rojo o carpa dorada (Carassius aurata). Es en un umbral sonoro entre 1 y 2 KHz donde este pez muestra un mayor nivel de estrés, medido como número de movimientos operculares por minuto. It is studied the range of sound frequency (Hz) where the goldfish (Carassius aurata) shows higher stress. Between 1 and 2 KHz this fish shows a more elevate number of movements per minute of the flap cover of the gills, indicating a higher level of acoustic stress.
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Programa de doctorado de Acuicultura: producción controlada de animales acuáticos.
Acto celebrado en la sala de grado de la Facultad de Ciencias del Mar de la Universidad de Las Palmas de Gran Canaria, el 28 de junio de 2013, actuando como Presidenta María Candelaria Gil Rodríguez (Universidad de La Laguna), Secretaria Ascensión Viera Rodríguez (Universidad de Las Palmas de Gran Canaria), vocales, José María Gorostiaga Garay (Universidad del País Vasco), Juan Luis Gómez Pinchetti (Universidad de Las Palmas de Gran Canaria) y Nathalie Korbee Peinado (Universidad de Málaga)