Interaction between test and reference populations when tilapia strains are compared by the “internal control” technique
MetadataShow full item record
Cited times in Scopus
Several strains of Oreochromis niloticus, O. mossambicus and their hybrids occur in the Philippines, and others are likely to be introduced or developed locally in the near future. Our objective was to study biological interaction. The paper reports on an experimental design in which "reference" fish are included in each replicate to provide internal statistical control. Growth of 10 full-sib families from each of two domestic strains was compared. A third strain of red tilapia was mass spawned to provide reference fish. Thirty equal-sized fry from each family were matched with 30 red tilapia fry and reared for 8 weeks in laboratory aquaria. The fish were deliberately crowded to provide a "worst-case scenario" for the application of the reference-strain technique. The objective was to see whether behavioural interaction causes statistical or genotype × environment interactions that create problems in the analysis. The test strains interacted biologically with the reference strain in different ways: the growth (change in length) of strain 1 only was negatively correlated with reference growth. Statistical interaction did occur in this extreme situation. We speculate that the reference-fish technique will be more useful in experiments in ponds or cages, where variable environmental factors induce positive, rather than negative, correlations between reference and test strains.
Suggested CitationBasiao, Z. U., & Doyle, R. W. (1990). Interaction between test and reference populations when tilapia strains are compared by the “internal control” technique.
- AQD Journal Articles 
Showing items related by title, author, creator and subject.
Interactive influence of dietary protein and lipid on maturation of Indian white prawn, Penaeus indicus broodstock Santander-Avancena, Sheryll; Traifalgar, Rex Ferdinand; Laureta, Liberato V.; Monteclaro, Harold; Quinitio, Gerald (Wiley, 2020-12-24)The establishment of protein and lipid requirements for growth of penaeid species is essential in maximizing productivity but information on the effects of these nutrients on gonad maturation is still lacking. Indian white ...
Interaction between Rhodobacter sphaeroides and Harmful Algal Bloom (HAB) causing dinoflagellate Amphidinium carterae Cabalfin, Jec Jose Miguel C.; Lamzon, Joseph Dinesh H.; Serra, Vaughn Remos M.; Mediodia, Harold P.; Catedral, Demy D. (Research Unit of Philippine Science High School - Western Visayas Campus, 2019)The present study hopes to develop a further understanding regarding algal-bacteria interactions as an option for bioremediation. After the use of chemicals against the events of the red tide proved to be impractical due ...