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Studies on the suitability of commercial dry diets for rearing of larval Coregonus lavaretus from Lake Constance

Published online by Cambridge University Press:  15 October 1988

Helmut Segner ,
Roland Rösch ,
Hartmut Schmidt  and
Klaus Jürgen von Poeppinghausen
Helmut Segner
Affiliation:
Zoologie II, Universität Karlsruhe, Kaiserstr. 12, D 7500 Karlsruhe, FRG
Roland Rösch
Affiliation:
Landesanstalt für Umweltschutz, Institut für Seenforschung und Fischereiwesen, Untere Seestr. 81, D 7994 Langenargen, FRG
Hartmut Schmidt
Affiliation:
TetraWerke, Dr. rer. nat Ulrich Baensch GmbH, Herrenteich 78, D 4520, Melle I, FRG
Klaus Jürgen von Poeppinghausen
Affiliation:
TetraWerke, Dr. rer. nat Ulrich Baensch GmbH, Herrenteich 78, D 4520, Melle I, FRG
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Abstract

The suitability of two commercial dry diets for rearing Coregonus lavaretus larvae was tested in a 58-day experiment. A diet of live zooplankton was used for comparison. The trials were conducted at water temperature of 12 °C in 800 l tanks, with a stocking density of 10 000-25 000 larvae per tank. Diets were evaluated by means of growth and liver histological analysis. Best growth was obtained with zooplankton, but one of the two dry diets (TetraWerke Az 20) also resulted in satisfactory gowth. Examination of liver structure using light and electron microscopy revealed no nutritional pathology for larvae fed with dry diet Az 20. Histological diagnosis presented evidence for a close association between hepatic protein synthesis and larval growth. From the data of the present study it can be concluded that a large-scale rearing of larvae of Coregonus lavaretus exclusively on dry food, is feasible.

Keywords

Coregonus lavaretuslarval nutritiondry dietsgrowthliver histologyCoregonus lavaretusnutrition larvairealiments secscroissancehistologie du foie
Type
Research Article
Information
Aquatic Living Resources , Volume 1 , Issue 4 , October 1988 , pp. 231 - 238
Copyright
© IFREMER-Gauthier-Villars, 1988

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