When Do Bull Trout Spawn In Idaho

C onnected spawning and maturing habitats are key to Bull Trout survival.

When do bull trout spawn in idaho. They spawn in the fall after temperatures drop below 48 degrees Fahrenheit in streams with abundant cold unpolluted water clean gravel and cobble substrate and gentle stream slopes. After a few more years the once little bull trout are big and ready to head back up the mountain streams to lay eggs of their own. They spawn in the spring as early as February in coastal rivers and as late as July in high mountain lakes and streams.

In some cases traveling well over 100 miles in a few months. Trout 168 kg and the current world-record bull trout 145 kg caught from Lake Pend Oreille. SCHILL AND ELIZABETH R.

Therefore Bull Trout require sparkling clean clear streams to thrive. During the summer months they eat their way up the system before entering small tributaries to spawn in September. Bugs much anymore and start eating other fish instead.

Sculpin are the only other fish in these streams along with aquatic insects and other invertebrates. They spawn in the fall and the adults return to the lake. Cutthroat trout construct a redd in the stream gravel to lay eggs.

The female selects the site for and excavates the redd. Many spawning areas are associated with cold. They have an unspotted dorsal fin.

Society in 1980 identified bull trout as distinct from the Dolly Varden. Spawning occurs in the fall from late August to December when water temperature is declining from about 34 C 3841 F. They spawn in early fall and then slowly migrate downstream to.