Other tyrannosaurids exhibit extremely similar growth curves, although with lower growth rates corresponding to their lower adult sizes. Compared to albertosaurines, "Daspletosaurus" showed a faster growth rate during the rapid growth period due to its higher adult weight. The maximum growth rate in "Daspletosaurus" was per year, based on a mass estimate of in adults. Other authors have suggested higher adult weights for "Daspletosaurus"; this would change the magnitude of the growth rate, but not the overall pattern. The youngest known "Albertosaurus" is a two-year-old discovered in the Dry Island bonebed, which would have weighed about and measured slightly more than in length. The specimen from the same quarry is the oldest and largest known, at 28 years of age. The fastest growth rate is estimated to occur around 12–16 years of age, reaching per year, based on a adult, which is about a fifth of the rate for "T.-rex". For "Gorgosaurus", the calculated maximum growth rate is about during the rapid growth phase, which is comparable to that of "Albertosaurus".