The dam blocked the migration of white sturgeon to their upstream spawning areas.

The major spawning areas are offshore, in waters that are 100 to 130 feet deep.

Furthermore, the "wetland management" activities of the beavers may well provide improved spawning areas for these fish.

The riparian wetlands were the main spawning areas.

The 7500 m2 nature preserve is an amphibian spawning area of national importance.

Males as young as two years old have been encountered in the spawning areas of the Chesapeake bay.

Males establish and defend small territories in shallow, quiet-water spawning areas.

Main concern about the spawning areas is industrial pollution.

The river water, at an unusually warm 59 degrees, threatens salmon eggs now hatching along a 65-mile-long spawning area.

Apparently we're in close proximity here to one of their major spawning areas, and they don't want these people lingering.