Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/74554
Title: Estudios de zootecnia en paralarvas de pulpo común ("Octopus vulgaris")
Authors: Suárez Hernández, Nauzet David
Director: Socorro Cruz, Juan
Estefanell Ucha, Juan
Mesa Rodríguez, Antonio
UNESCO Clasification: 251092 Acuicultura marina
Keywords: Octopus vulgaris
Paralarvae
Artemia
Marine lecithin
Issue Date: 2016
Abstract: El cultivo del pulpo común Octopus vulgaris está limitado por una alta mortalidad durante la fase larvaria. En esta tesina se testaron varios parámetros zootécnicos con el objetivo de estandarizar las condiciones de cultivo. Se elaboró un protocolo de engorde de artemia durante 3 días (longitud total de 1,126±0,058 mm), y su posterior enriquecimiento con lecitina marina. Se realizaron 6 experiencias cortas (7-10 días) de cultivo de paralarvas en tanques de 170 l, evaluado el efecto del color de tanque (blanco o negro), origen de las paralarvas (puestas recolectadas del medio silvestre o cautividad), densidad inicial de paralarvas (3, 6 ó 9 paralarvas/l) y tasa de alimentación (0,5, 1 ó 2 artemia/ml y día). Las paralarvas mostraron un mayor crecimiento y supervivencia en tanques de color negro, independientemente de su origen y densidad inicial de cultivo. Se observó una mayor supervivencia cuando la tasa de alimentación fue de 1 artemia/ml. Estas conclusiones se aplicaron en un cultivo a escala industrial en tanques negros de 2000 l (por triplicado), obteniendo un crecimiento de 5,5±0,1%/día y una supervivencia de 20,5±10,6% hasta los 20 días de cultivo. Estas paralarvas fueron transferidas a nuevos tanques de cultivo para realizar un destete temprano (por duplicado) durante 15 días, reduciendo paulatinamente la dosis de artemia e incrementando la dosis de una microdieta experimental. En esta fase, las paralarvas mostraron un crecimiento positivo (2,9 y 3,4%/día) y una baja supervivencia (0,8 y 1,8%), posiblemente asociado a la inmadurez del sistema digestivo en etapas tempranas.
The culture of the common octopus Octopus vulgaris is still limited by high mortality during the paralarval stage. In this minor thesis several zootechnical parameters were assessed in order to standardize the paralarvae rearing conditions. Moreover, a protocol for growing artemia up to 3 days was developed (total length of 1,126 ± 0,058 mm), which was enriched with marine lecithin. Six short paralarvae rearing experiments (7-10 days) were performed in 170 l tanks, evaluating the effect of tank color (white or black), origin of paralarvae (egg masses collected directly from the natural environment or obtained in captivity), initial paralarvae rearing density (3, 6 or 9 paralarvae/l) and feeding rate (0,5, 1 or 2 artemia/ml and day). The highest growth and survival were observed in paralarvae reared in black tanks, regardless of their origin and initial rearing density. Also, the highest survival was observed in paralarvae fed on 1 artemia/ml and day. These conclusions were applied in a final experiment performed at industrial scale, using black 2000 l tanks (in triplicate). The paralarvae showed growth rates of 5,5±0,1%/day and survival rates of 20,5±10,6% after 20 days of rearing. These paralarvae were transferred to new culture tanks to test an early weaning protocol (in duplicate) for 15 days. For this, the dose of artemia was gradually reduced as the dose of an experimental microdiet was gradually increased. In this phase, the paralarvae showed positive growth (2,9 and 3,4%/day) and low survival (0,8 and 1,8%), probably associated to the immaturity of the digestive system.
Faculty: Facultad de Ciencias del Mar
URI: http://hdl.handle.net/10553/74554
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