Sto:lo is not a band, but a tribal council.
There are two main tribal councils in the Fraser Valley - Sto:lo Nation and Stó:lō Tribal Council, each are made of many First Nations from Hope to Langley.
The Lower Fraser First Nations' pink salmon fishery is not a communal or ceremonial fishery, but an
economic opportunity opening. A similar opening for chum salmon is also available in October and November. It is a seine fishery, which allows participants to selectively harvest pink salmon and release other species. Harvested fish, specifically the roe in females, are sold.
The discarding of male pink salmon is obviously not a good practice. Several years ago members of the Upper Fraser Valley Sportfishing Advisory Committee pointed out that when a allocated quota of pink salmon is given in this fishery, the actual harvested/killed amount is in fact double of the quota, assuming the gender ratio is 1:1 and only female fish are harvested.
If it is any consolation, unharvested dead fish return to the ecosystem, doing what they do best, becoming nutrient of the Lower Fraser River watershed. The run size is much larger than required spawning escapement so from the fishery management's perspective, it does not have a significant impact on the number of offsprings produced.
If individuals find this practice unethical, then perhaps one should take a look at the commercial pink and chum salmon fisheries, which remove millions more fish than the First Nations' economic opportunity openings. Both fisheries' objective is to harvest the profitable roe, the difference is that unwanted fish by the commercial sector do not go back to the system, instead majority of the biomass is processed cheaply as various animal food products.
This of course does not excuse witnessed behaviours, because ALL fisheries in every sector have room for improvement. Wasted by-catch in commercial harvest (dumped into the ocean) should be significantly reduced, many participants in the recreational fishery should be treating the resource respectfully (a tour around the Chilliwack, Stave, Chehalis River summarizes this), this planet could be better of without aquacultural practices of predatory species at high trophic level.
The problem with discussions such as this is they simply lead to rants without action and in a couple of months from now, most are forgotten and sink into the archive. Addressing the problem is always good, but failing to research for better understanding of the problem and develop possible solutions only repels any further interests in the issue. Secondly, both intentionally and unintentionally, participants generalize all First Nations as individuals who disrespect the resource. Further more, there is tremendous amount of misinformation and speculations presented, which only widens the division between recreational anglers and First Nations.
If people wish to change things, try dealing from a different approach. Join and volunteer at a local sportfishing organization that can represent your voice. The Fraser Valley Salmon Society, or the BC Federation of Drift Fishers (which by the way,
will be launching the new Chehalis fishing trail with the Chehalis First Nation in two weeks from now). Attend the sportfishing advisory committee meetings, which only take place twice a year.