Lots of good questions and points raised here. The whole point of raising and stocking fish is so that they survive and return to the fishery, so I certainly understand everybody’s concern with issues immediately following stocking.
I’ll preface this by saying nothing about the brown trout stocking is ideal. They’re the Plymouth Rock strain, which is not a particularly well-performing strain. They’re only about 3.5 inches, which means no matter what they probably have fairly low survival. And they’re stocked directly in the harbor, during daylight.
However, they are bonus fish – we don’t have capacity to raise them in our hatchery, and we get extra fish that Illinois produces. All that it costs Indiana is supplying them with some Skamania eggs, and the staff time to go get the browns and stock them.
But that said, obviously anything we can do to boost survival is a good thing.
A few answers to some questions raised
1) I’ll forward the pic of the birds and some of the concerns to hatchery staff. They can only see the conditions when they are there stocking the fish, so if the birds show up after the fact, they won’t know unless they are alerted
2) Given that we are picking up the browns from Illinois, we have much less control over the timing of the process compared to fish in our own hatchery system. When Illinois DNR has the time to load their fish on our truck is what we go with. The very latest they can load our truck is early afternoon. Jake Wolf hatchery is about 3.5 hours from East Chicago with no traffic, and there’s always a chance for heavy Chicago-land traffic. The later in the day the fish are loaded (within the available window that Illinois staff can work to load our fish), the higher the chances are that traffic becomes an issue. Last year, the truck got stuck in Chicagoland traffic for over 2 hours. Thankfully there were no obvious issues to fish health in that particular incident, but there are legitimate concerns over stressing fish out and losing a significant chunk of them. We have to weigh the possibility of stocking ALL the fish stressed out, or the small chance of losing a significant chunk of them on the truck, versus some mortality from bird predation. It’s not exactly a black and white, clear cut answer. And certainly not as easy as “just stock at night”. There are real logistic constraints to our options with the brown trout that are inescapable.
3) The stocking pipe is deliberately not touching the water because of biosecurity issues. They try as hard as possible to not pick up anything from the body of water they stock, because it could come back on the truck to the hatchery. Such as a bacteria, virus, or invasive species. They obviously disinfect things, but they want to be absolutely sure they are as safe as possible, because those types of things can wreak havoc on hatcheries. Salmonids are stocked via airplane out west and survive very well. I promise a fall of several feet from the truck has almost zero impact on survival
4) The hatchery staff member was accurate in saying we were only stocking the kings at night, and that’s because of the above - we can control that chinook stocking process with entirely our staff, not dealing with Chicago traffic, long drives, and another agency’s staff.
5) Net pens would certainly be a good option for acclimation of the browns, and that’s something that had been getting kicked around internally and also I’ve had discussions with some anglers that call EC home. Even a 1- or 2 day acclimation with release at night would be something. Those discussions got sidelined for this spring because of Covid-19
6) If people truly think it’s a waste to stock browns at EC, I’d be open to proposals of where they should be stocked, or if browns should even be stocked at all (keep in mind these are bonus fish we don’t raise ourselves)