Fish survival throughout this river and any other depends so much on water temperature during summer. That is because of the inverse relationship of dissolved oxygen to water temperature. In other words, the higher the water temperature the lower the dissolved oxygen content. This concentration below six milligrams per liter of water brings on difficult survival conditions for salmonids. The Henry’s Fork has locations where this level is approached during afternoon hours, and when that temperature is nearing 70 deg. F. or more, it is time to find cooler water in which to fish. Salmonids caught and played at this temperature level and higher have more recovery difficulty induced by the stress of being caught and played, and the larger the fish the more difficult recovery becomes. Thus consider using a thermometer to check afternoon water temperatures wherever you are on the river, and give the ” bows, cutts, brookies, browns, and even whitefish” a break by moving to a cooler water location.
Henry’s Fork Foundation has another river cleanup coming up on July 30th from 9am-3pm. We will be starting at Ora bridge in Ashton, then stopping at access sites such as Chester, Fun Farm, Del Rio, Bubble Land, and Red Road. If you are interested in participating, please let me know! Lunch will be provided as usual, and we can provide transportation for a limited number of volunteers.
Best,
Jasper
–
Jasper Davis (she/her)
Outreach and Communications Coordinator
Henry’s Fork Foundation
![https://ci3.googleusercontent.com/mail-sig/AIorK4yMPCkO-Zzi2sVquCKI-hkMzJN5yS5pcqnXxtlXAOpAd9tX2viqm0h9BYQyfP46Xa7DXp2VdeckzIYt]()
P.O. Box 550
Ashton, ID 83420
office: 208-652-3567
cell: 480-993-8694
