I would imagine the handling process of a broodstock fish is alot more extensive than a rec cnr fish, considering the 31% mortality vs 11%. A broodstock fish is caught by hook and line, put in a tube, transported to a holding facility, and held captive until ripe enough to remove eggs? Quit the process if I am correct. The numbers Eyefish posted does raise some concern on female reproduction from the rec cnr side. Rec cnr mortality may be half of the Snider Creek mortality, 15% females and 5% male? Interesting.....
Having broodstocked salmon and tracked steelies I can say this with certainty, females can be a problem. It is about when, where, and how you catch them. It is a simple problem to figure out and is this. Females pour everything they have into egg development and as Harry taught me they do not rebound well from capture. Energy level is low and many just can not get themselves back to where they were naturally. It is best to get them above holding and staging areas as they are pretty resilient by then and hook and line is not a safe capture method if you do not avoid these two things. One can reduce holding mortality but it is always about stress and the solution is mostly going to be site specific. Most state facilities are designed for making the process manageable for the workers which usually 100% in conflict with the needs of the fish.