-
Publication Type
-
Contribution to conference
-
Authors
-
Focken, U.; Groth, A.; Hörstgen-Schwark, G.; Becker, K.
-
Year of publication
-
2001
-
Published in
-
EAAP Publication 103
-
Pubisher
-
Wageningen Pers
, Wageningen
-
Page (from - to)
-
333-336
-
Conference name
-
15th Symposium on Energy Metabolism in Animals
-
Conference location
-
Elsinore, Denmark
-
Conference date
-
10.-16.10.2000
-
Keywords
-
growth, metabolism, Tilapia
Abstract
Tilapia are important fish in tropical aquaculture and serve as model organisms in many laboratories. The number of animals that can be used in physiological experiments is always limited. Individual variability often masks the effects of treatments. Selection of genetically similar or identical animals has been suggested to reduce this variability. In this study, the individual variability of several parameters in two breeds of Tilapia (Oreochromis niloticus) was examined: homozygous clones, from a homozygous strain, and heterozygous clones, obtained by cloning fertilised eggs of two genetically different homozygous parents.
The variability in metabolic rates in both clone groups was reduced compared to the rates of the normal diploid Tilapia of the same origin used in previous experiments. Homozygous clones had higher standard metabolic rates and lower active metabolic rates compared to heterozygous clones and the reference group.
