Individual variability of growth, body composition and metabolic rates in cloned Tilapia (Oreochromis niloticus)

Publikations-Art

Kongressbeitrag

Autoren

Focken, U.; Groth, A.; Hörstgen-Schwark, G.; Becker, K.

Erscheinungsjahr

2001

Veröffentlicht in

EAAP Publication 103

Verlag

Wageningen Pers , Wageningen

Seite (von - bis)

333-336

Tagungsname

15th Symposium on Energy Metabolism in Animals

Tagungsort

Elsinore, Denmark

Tagungsdatum

10.-16.10.2000

Schlagworte

growth, metabolism, Tilapia

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.