Ecologists call this ontogenetic niche shifting.

生态学家称此为个体发生生态位转移。

So you might have something missing in an ontogenetic series.

所以你可能在个体发育系列中缺少一些东西。

The second is ontogenetic variation, or variation because of age and growth, like the size of the antlers.

第二种是个体遗传变异，或因年龄和生长而发生的变异，例如鹿角的大小。