e~p o r t , OR 97365, &rYA BERNARD, D. R. 1981. Multivariate analysis as a means of comparing growth in fish. Can. J. Fish. Aquat. Sci. 38: 233-236.The Hotelling's T~ is described as a test for differences between like von Bertalanffy growth parameters estimated from two fish groups when these parameters are correlated.Equations to calculate 7 " ' are presented as are equations to modify T2 to an F statistic for use in testing. Simultaneous confidence intervals and critical F values are described to separate effects of parameters on observed differences in growth. Assumptions made by the T2 technique are discussed, as are ways in which any bias caused by violating these assumptions is lessened. Two numerical examples concerning growth differences among groups of Pacific ocean perch (Sehastes alutus) are provided. Growth of male and of female perch captured off the Columbia River is different with L, being the most statistically significant parameter and P, the Beast. Growth of male perch captured off Vancouver Island and off the Columbia River is also different with only L, statistically significant. , 1981. Multivariate analysis as a means of comparing growth in fish, Can. J. Fish. Aquat. Sci. 38: 233-236. Le prksent article contient une description du T2 de Hotelling comme test des diffbrences entre paramGtres de croissance de von Bertalanffy semblables estimts chez deux groupes de poissons et quand ces parametres sont reliCs. On y resente les Cquations servant B calculer P T' ainsi que les Cquations pernettant de modifier T en une statistique F pour usage dans le test. On dCcHit les intervalles de confiance simultanks et les valeurs critiques de I: afin de siparer les effets des paramktres sur Ies differences de croissance observkes. Les hypothises sous-tendant la technique du T2, ainsi que les moyens d'attknuer tout biais pouvant risulter de la violation de ces hypothkses sont examinbs. Deux exemples numkriques de differences de croissance p a m i des groupes de sChastes B longue michoire (Sebastes ctfutu.~) sont prQentCs. Les &bastes miles et femelles capturis au large dm fleuve Columbia diffkrent dans leur croissance, H , , Ctant le parametre le plus significatif i l'analyse statistique et to, le parametre le moins significatif. La croissance des sCbastes m3es capturbs au large de I'ile Vancouver et au Iarge du Weuve Columbia differe Cgalement, L, seul Ctmt statistiquement significatif.