Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/8707
Título: Optimización del cultivo de diatomeas bentónicas para el cultivo de post-larvas de abalón ("Haliotis tuberculata coccinea" Reeve, 1846)
Autores/as: Porta-Vales, Anastasia
Director/a : Courtois de Viçose, G. 
Clasificación UNESCO: 251092 Acuicultura marina
310502 Piscicultura
Palabras clave: Benthic diatom
Growth
Cell attachment
Biochemical composition
Abalone
Fecha de publicación: 2009
Resumen: Diatom cell quantity and their biochemical composition vary among species and are greatly affected by harvest stage or culture conditions. Biometric parameters, growth, attachment capacity and variations in biochemical composition of four species of benthic diatoms (Amphora sp., Navicula incerta, Nitzschia sp. and Proschkinia sp.) were studied. For biochemical analysis the diatoms were harvested at different stages, in log and stationary phase of growth. The culture conditions were identical for all the experiments, benthic diatoms were cultured during 7 days in F/2 medium at 28.5 ± 1.4 ºC, at different original inoculating densities (50000, 100000, and 250000 cell mL-1), under continuous light of 5403 ± 649 Lux provided by cool white fluorescent lighting. The cultures were neither aerated nor agitated. These results show that the specific density of 10000 cell mL-1 was the best for weekly production: Proschkinia sp. reached the highest cell density of 5.81 x 106 cells mL-1 and Amphora sp. had the highest cell attachment capacity with 12000 cell mm-2, in stationary phase of growth. Protein and lipid content were higher in log phase than in stationary phase for the four diatoms. Amphora sp. in log phase of growth had the highest lipid content of 9.74% dry weight (DW). Polyunsaturated fatty acid (PUFA) content ranged from 23.25% to 38.62% of the total fatty acids (TFA), and the four diatoms tested were richer in n-3 PUFA than in n-6 PUFA. All the diatoms had significant quantities of 20:5n-3 (EPA) ranging between 12.69% and 17.68% of TFA. Benthic diatoms play an important and critical role in abalone culture as they are the principal food source of abalone post-larvae. Therefore, it is necessary to improve diatom quantity and quality to optimize post-larval nutrition and the consistency of production, resulting in an increase in growth and survival of abalones.
Descripción: V Máster Universitario Internacional en Acuicultura
Facultad: Facultad de Ciencias del Mar
URI: http://hdl.handle.net/10553/8707
Colección:Trabajo final de máster
miniatura
Adobe PDF (3,1 MB)

En el caso de que no encuentre el documento puede ser debido a que el centro o las/os autoras/es no autorizan su publicación. Si tiene verdadero interés en el contenido del mismo, puede dirigirse al director/a o directores/as del trabajo cuyos datos encontrará más arriba.

Vista completa

Visitas

105
actualizado el 02-sep-2023

Descargas

872
actualizado el 02-sep-2023

Google ScholarTM

Verifica


Comparte



Exporta metadatos



Este elemento está sujeto a una licencia Licencia Creative Commons Creative Commons