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Resumen del producto

Dumas, S., I., Guzman de las Nieves, L., Stephanie Mercier, R., Peña Martínez, M., Contreras Olguín, L., Seychelles & L.G., Flores Montijo (2019). Use of the nematode Panagrolaimus sp. as a substitute for brine shrimp in the larval culture of  Seriola rivoliana. Aquaculture 2019. New Orleans, Estados Unidos de América, marzo 7 - 11, 2019, 437.

Use of the nematode Panagrolaimus sp. as a substitute for brine shrimp in the larval culture of  Seriola rivoliana

Silvie Dumas, Itzi Guzman de las Nieves, Laurence Stephanie Mercier, Renato Peña Martínez, Mauricio Contreras Olguín, Laurent Seychelles y Laura Guadalupe Flores Montijo

Larval rearing is considered one of the most complex stages in marine fish aquaculture because it relays on the production of live food organisms such as rotifers or/and Artemia. The use of Artemia presents some disadvantages: short supply and high price, variation in hatching and nutritional value, deficiency in highly unsaturated fatty acids (HUFA), and vector of bacterial and toxic compounds. Nematodes have been considered as a food alternative in fish larval rearing because they have a proper range of size and a good nutritional profile. They can also be used as a vector of substances and some nematodes support anhydrobiotic conditions. Larvae of Seriola rivoliana were fed copepods and rotifers from day 3 to day 9 in a 2,000-L tank. On day 10, larvae were transferred to eight 180-L tanks at a density of 6.7 larvae L-1. Two treatments using four replicates each were evaluated. In the first treatment, a “co-feeding” diet (75-25%, 50-50%, 25-75%) was used, which consisted in supplying rotifers and enriched Artemia nauplii from day 10 to 12 and finally in days 13 and 14 only Artemia was supplied. The second treatment consisted of the same procedure as in treatment 1, replacing Artemia with the nematode Panagrolaimus sp. Feeding efficiency (larvae with food in the digestive tract) and intensity (average number of preys in the digestive tract) were evaluated on days 10, 11, 12 and 13. Total length was also determined on days 9, 10, 11 and 14. In addition, samples were taken to determine HUFA concentrations of live feed and larvae in both treatments. Larvae were sampled for bromatological and histological analyzes too. Feeding efficiency was higher on day 13 in larvae fed with nematodes; however, for each sampling day, feeding intensity was greater in larvae fed Artemia. No significant differences were observed in growth between treatments.

Palabras clave: feeding; Larviculture; Seriola rivoliana; nematodes.

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