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Genotype environment interaction in the response of three strains of Nile tilapia to poor nutrition

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Date
1992
Author
Romana-Eguia, Maria Rowena R. ORCID
Doyle, Roger W.
Page views
1,538
ASFA keyword
diet ASFA
environmental factors ASFA
feeding experiments ASFA
fish culture ASFA
genotypes ASFA
growth ASFA
nutrition ASFA
nutritive value ASFA
protein deficiencies ASFA
selective breeding ASFA
yields ASFA
AGROVOC keyword
Oreochromis niloticus AGROVOC
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Abstract
Experiments were conducted to determine the effects of poor nutrition on the growth of three Oreochromis niloticus strains fed protein-deficient diets. Four-week-old fry from the three "test" strains were paired with a fourth "reference" strain of tilapia (red) of the same size and stocked in 60-1 aquaria. The treatment lasted 6 weeks, with fish being fed commercial fish feed crumbles for the first and last 2-week periods and rice bran during weeks 3 and 4. Control fish were fed commercial diet throughout. Both control and treatment fish were fed at 20% of fish biomass per day. Lengths and weights were measured every 2 weeks.

Significant strain effects were noted when the growth of test fish over the whole experimental period was analysed by analysis of covariance using the reference fish growth as a concomitant variable. The relative growth of the three test strains differed at each feeding phase. The NIFI strain grew best during the commercial feed phases, the Israel strain performed best during the rice bran phase while the CLSU strain, regardless of the type of nutritional environment, usually ranked last. Different performance rankings at each feeding phase represent strong genotype X environment interaction among these commercially important lines. This was statistically confirmed by analysis of covariance of the growth of the Israel and NIFI strains during the different feeding phases using the reference strain as a covariate.
URI
http://hdl.handle.net/10862/1394
Suggested Citation
Romana-Eguia, M. R. R., & Doyle, R. W. (1992). Genotype environment interaction in the response of three strains of Nile tilapia to poor nutrition. Aquaculture, 108(1-2), 1-12. https://doi.org/10.1016/0044-8486(92)90314-B 
DOI
10.1016/0044-8486(92)90314-B
Type
Article
ISSN
0044-8486
Collections
  • Journal Articles [1196]

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