In order for Aurora Trout to spawn successfully, the water temperature must be below 20°C/68°F.

Little was known about the spawning habits of the Aurora Trout until the 1950s when the Ontario Ministry of Natural Resources, in an attempt to rescue the Aurora Trout from extinction, took nine Aurora Trout in to a hatchery in order to increase their numbers and reintroduce them back into the wild into their native lakes as well several other lakes in order to reduce the risk of extinction.

Before being returned to their native lakes, lime was added to reduce the Ph level to a point where the Aurora Trout are able to reproduce naturally in a sustainable fashion.

There are currently 12 reported lakes in northern Ontario, Canada that are populated with Aurora Trout. However, most of these are continually stocked by government programs to keep their numbers up. Only in their native lakes are their populations stable enough that annual stocking is not required.

Aurora Trout Egg Production

The average female Aurora Trout lays as many as 5000 eggs in a single spawn. She is normally between three to four pounds and 12 inches long. However, some females have been know to lay as few as 200 eggs in a single spawn.

Numbers this low are a concern for sustainability of populations in new lakes. Little is known as to why some produce so few eggs. It is believed that some are not mature enough or their is not enough food to produce sufficient number of eggs.

Spawning Requirements

In order for Aurora Trout to spawn successfully, the water temperature must be below 20°C/68°F. Like the Brook Trout, the Aurora Trout require ground water upwellings close by to build a best. If no upwelling is present and the water is warm or murky, they will not spawn.

Moreover, the Ph level must be less than 5.0 for the Aurora Trout to be able to successfully reproduce.

Aurora Trout Life Cycle

The Aurora Trout has the same life cycle as the Brook Trout. As such, it is easy to infer and project what is little known about from the Aurora Trout onto it from the Brook Trout.