Most years, the sac roe herring fishery in Sitka means boats filling the harbor, crew members filling the bars, seiners jostling for position within sight of town, and spotter planes in close formation overhead. But this year fishermen voted to abandon the competitive fishery in favor of a co-op. That meant a much smaller footprint, with fewer boats, crewmen, tenders, and spotter pilots. The reason? Low prices for roe, for starters. And a strong US dollar that makes all American exports more expensive.