These comments from Bill McMillan's presentation at the Wild Steelhead Coalition Meeting last night courtesy of Nate Mantua the WSC's VP Science and Education:
I was also really impressed by the scope of issues Bill covered in last night's presentation.
While I struggled to take notes in the dark during Bill's slide show, I did get this provocative stuff down:
* Male steelhead as vectors for hatchery/wild interactions: the basic idea here is that buck steelhead are sexually mature from late fall through late spring, and they will attempt to spawn with as many hens as they can over that window of time. Even though hatcheries have bred hens to mature in Dec-Jan-Feb, the hatchery bucks still in the river can and likely do spawn with wild hens that typically mature in March-April-May-June. Bill has a published
study on this issue that's available on the Wild Salmon Center's web-site:
http://www.wildsalmoncenter.org/steelhead.pdf The bottom line? You simply cannot use March 15 as a meaningful date for separating wild and hatchery steelhead populations. Yet our WDFW has attempted to do just that.
* Evidence from Kamchatka (in the 1990's) and Celilo Falls on the Columbia (around 1900) supports the idea that undisturbed wild steelhead populations have much more diverse spawn timing than our present populations. Among steelhead sampled at Celilo 1902, about 1/3 were mature enough that they'd likely be ready to spawn in mid-November or December, while the other 2/3's were not ripe at all and not likely to spawn until the next spring. Today we rarely see these early wild spawners in the Northwest. Bill labelled the NW data collected in the past few decades as part of a "curtain of misinformation, where we have volumes of accumulated misinformation from a tattered resource."
* In the Kamchatka streams he worked on, they found steelhead/rainbow populations with 3 main life history types. Anadromous types (steelhead) were 2/3 females; estuary types (half-pounders) were 2/3 males; and stream types (rainbows) were 2/3 males. Each "type" fills a different niche, and as nature thows a variety of curveballs at these fish (like floods, droughts, lousy ocean conditions, even volcanic eruptions), different components of the overall population boom and bust. It provides the kind of safety net required to survive over the long haul. And it's the kind of population diversity that we've largely (or entirely) lost in many of our heavily impacted wild steelhead populations in the Northwest.
* and here's another gem: "what you spend is what you get". That Washington's DFW is heavily invested in hatchery programs, much moreso than in habitat/wild stock programs. In the early 1990's, WA dept of wildlife was spending about $26 million a year on hatchery steelhead programs, but only about $1.5 M on wild fish programs.
And probably most disturbing was his belief that we aren't likely to recover wild populations without tackling the hatchery interaction problem. Even with 100% wild steelhead release, even with improving stream habitat, Bill feels that interactions with hatchery fish present a critical barrier to wild steelhead recovery. The good news is that he also believes we can recover wild fish populations, have quality sport fisheries, even some with harvest, if we ALLOW our wild populations to recover. He cited a few examples where mostly or entirely wild stocks have shown great productivity in the recent past. These streams include: the Toutle River 5 years after Mt St. Helens. The Salmonberry in Oregon, Satus Creek on the Yakima reservation, the John Day (with as many as 40,000 wild fish per year in 1985-1988), and Joeseph Creek (near the Grande Ronde).
Seems like he was pointing the finger back at us. Can we be bold enough to cut back on hatchery programs to give our wild fish a chance?
Nate