similar ages in Kenway et al. (2006). Similar estimates of genetic
correlations were found in both studies between weights at week 30/
32 and week 40/44 in the Kenway et al. (2006) (0.97) and the present
study (0.95), respectively. However, estimates of correlations were
less consistent between other ages. The correlations reported in the
present study were more consistent with an earlier study evaluating
size and growth traits of P. vannamei reared in indoor systems (Perez-
Rostro and Ibarra, 2003a) for which estimates of genetic correlations
for weight were 0.52 between weeks 17 and 23 (0.63 between weeks
16 and 24 in the present study); 0.30 between weeks 17 and 29 (0.15
between weeks 16 and 32 in the present study); and 0.77 between
weeks 23 and 29 (0.62 between weeks 24 and 32 in the present
study). Importantly, the consistent results found between the present
study and the Perez-Rostro and Ibarra (2003a) study suggest that the
ontogenetic patterns of age:age genetic correlations may be, to a
degree, consistent across shrimp species.