Food intake and growth of larve of Coregonus lavaretus L.: effect of incubation temperature, diet and light
Rösch, R. (1992). Food intake and growth of larve of Coregonus lavaretus L.: effect of incubation temperature, diet and light, in: Progress in aquaculture research: proceedings of the 4th German-Isreali Status Seminar held on October 30-31, 1990. Spec. Publ. Eur. Aquacult. Soc, 17: pp. 269-277 In: Moav, B.; Hilge, V.; Rosenthal, H. (Ed.) (1992). Progress in aquaculture research: Proceedings of the 4th Status Seminar held on October 30-31, 1990 in GKSS-Forschungszentrum Geesthacht GmbH. Spec. Publ. Eur. Aquacult. Soc, 17. European Aquaculture Society: Oostende. ISBN 90-71625-11-7. 360 pp., more In: Spec. Publ. Eur. Aquacult. Soc., more |
| Abstract | Larvae of Coregonus lavaretus L. which were delayed in hatching proved to be of higher quality than larvae originating from eggs incubated at a temperature of 4°C or more. Artemia -nauplii were eaten within 2 days after the first food was provided. Larvae, which were delayed in hatching, started dry diet intake markedly earlier than normal hatched larvae. The onset of dry diet intake occurred much later than that of Artemia -nauplii. Comparing different dry diets, an intensively red coloured flake was accepted at first, whereas the standard dry diet used for mass rearing was accepted later. For dry diet rearing a minimum light intensity of >20 lux is required, as at 20 lux yield per tank was clearly lower than at light densities of 200 and 500 lux. No difference was found between these two higher light intensities. Food intake and growth of larvae reared on Artemia were not influenced by the different light intensities tested. In general, rearing on dry diet is still less successful than rearing on living zooplankton/ Artemia -nauplii. Therefore, in order to optimize dry diet rearing, the use of delayed hatched larvae, a minimum light intensity of 200 lux and an intensively red coloured dry diet, are suggested. |
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