214 DASA 2019-2 FREMONT-SMITH: DONALDSON: These are salmon? Yes. FREMONT-SMiTH: I thought there might be somebody that would know it. DONALDSON: In these experiments the exposure starts the instant the eggs are fertilized and continues until the yolk is absorbed and the fish are free-swimming, a period of 90 to 100 days. FREMONT-SMITH: radiation? DONALDSON: They are bigger and better as a result of the Yes. DUNHAM: Aré they all or are they selected? 90 or 99 percent of them. DONALDSON: Yes. that of the controls. DUNHAM: You still are losing : Survival of the irradiated fish is better than It's the ones that come back that are bigger and better. FREMONT-SMITH: Do you lose 90 or 99 percent? Is that right. DONALDSON: Actually the normal expected mortality of salmon in the sea is in excess of 90 percent. We release an equal number of controls and irradiated fish. For fish exposed to 0.5 rorl.3ras alevins, the survival, rate of growth, number and hatch of eggs produced are equal or superior in the irradiated group. FREMONT-SMITH: fish by radiation. So that is really as if you had benefited the DONALDSON: Yes. UPTON: How about the hatchery? DONALDSON: . EISENBUD: [Laughter] Better, though barely significant. Do the salmon say the university is always there? —