Nannochloropsis gaditana and Crypthecodinium cohnii, two microalgae as alternative sources of essential fatty acids in early weaning for gilthead seabream

  • Kamil Mert Eryalç?n Istanbul University, Faculty of Fisheries, Ordu Cad. No: 200, Laleli, Istanbul, 34470, Turkey. Grupo de Investigación en Acuicultura, ICCM & Universidad de Las Palmas de Gran Canaria,Ciencias Básicas, Tafira Baja, Las Palmas de Gran Canaria Canary Islands, 35017, Spain.
  • Eneko Ganuza Grupo de Investigación en Acuicultura, ICCM & Universidad de Las Palmas de Gran Canaria,Ciencias Básicas, Tafira Baja, Las Palmas de Gran Canaria Canary Islands, 35017, Spain
  • Eyad Atalah Grupo de Investigación en Acuicultura, ICCM & Universidad de Las Palmas de Gran Canaria,Ciencias Básicas, Tafira Baja, Las Palmas de Gran Canaria Canary Islands, 35017, Spain
  • Maria Carmen Hernández Cruz Grupo de Investigación en Acuicultura, ICCM & Universidad de Las Palmas de Gran Canaria,Ciencias Básicas, Tafira Baja, Las Palmas de Gran Canaria Canary Islands, 35017, Spain. Institute of Animal Health and Food Security (IUSA), Aquaculture Research Group, Trasmontaña, s/n, Arucas, Las Palmas de Gran Canaria, Canary Islands, 35413, Spain.
Palabras clave: Essential fatty acids, gilt-head bream, microalgae, microdiets

Resumen

In this study, the feasibility of the use of heterotrophic dinoflagellate Crypthecodinium cohnii and phototrophic eustigmataceae Nannochloropsis gaditana as a partial or total substitute for fish oil in weaning diets of gilthead sea bream is evaluated. 20 day old larvae were fed with the following microdiets: a control diet based on fish oil, two diets with 11% dry weight of N. gaditana or with 8% of C. cohnii as substitutes for fish oil (diets N and C, respectively), and one last diet that combined N. gaditana (5.5%) and C. cohnii (5.5%) with fish oil (5.5%, diet N+C). At the end of the experiment (after 17 days of treatment), the survival did not differ among the groups, but the total length growth and dry weight of the larvae fed with fish oil and C. cohnii were superior to that of those fed with N. gaditana (p < 0.05). The analysis of fatty acids confirmed that C. cohnii and N. gaditana were used as a source of fatty acids essential in the microdiets of the larvae of gilthead sea bream. The results of this study revealed that the eicosapentaenoic acid (EPA; 20:5n-3) provided by N. gaditana allows the survival of the larvae, and that the docosahexaenoic acid (DHA; 22:6n-3) provided by C. cohnii is necessary in weaning diets in the gilthead sea bream in order to maintain the optimal growth of the larvae.

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Cómo citar
Mert Eryalç?n, K., Ganuza, E., Atalah, E., & Hernández Cruz, M. C. (1). Nannochloropsis gaditana and Crypthecodinium cohnii, two microalgae as alternative sources of essential fatty acids in early weaning for gilthead seabream. HIDROBIOLÓGICA, 25(2), 193-202. Recuperado a partir de https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/476
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