This is our last, best hope for a good rain. I saw a presentation by a fisheries biologist just before the November 21-22 rain. Maryland, and I’m going to guess southern tier Pennsylvania also, has had poor survival of hatchling trout for the past few years, including the autumn 2023 year class.
Drought, of course, is terrible, but I learned that wintertime rains and especially high water also tend to wipe out large numbers of hatchlings.
If we get rain and the water comes up a little while the eggs are still in the redds, that’s mostly good because it means the water is not dropping, possibly exposing the eggs.
But if we get high water after the eggs hatch, the hatchlings (sac fry and fry) are just washed down stream and often out of areas where they can survive.
In Maryland last year we had a double hit: autumnal drought followed by post hatch high water.
A good snow pack, however would do the fish a world of good as the melting snow trickle charges springs of all kinds.
While it is possible some of the limestone creeks are exceptions to the early fall rains good, midwinter rain bad rule, in Maryland, our only fishable limestoner, beaver creek near Hagerstown, had a collapse in its flow last year.
This followed the big, as yet unexplained, fish kill in the upper reaches. Powell hatchery was affected, and the remaining wild browns in the creek had very poor spawning conditions.
The spring has come back, and the hope is this year’s spawn will be a good one.
An odd side note: it appears the absence of big browns in the fly zone just down from Powell hatchery has allowed an unusually large cohort of escaped hatchery fingerlings to take hold. They once they get a little size on them, they will probably provide sport in the next few years.
And now for a digression into a rabbit hole side subject.
Successful rainbow spawning is vanishingly unlikely in beaver creek, because the hatchery strain is almost exclusively female. They’re kind of like seedless watermelons or massive garden breeds of tomatoes: they get big pretty fast on less food than wild strains, but they mostly can’t reproduce.
I say mostly because they do go through the motions of spawning, to include going on spawning runs (of maybe a dozen or so fish statewide) out of the Baltimore area reservoirs in December and January.
My dad had some success with catching them, and the fellow who owned Sett’s sporting goods in Towson until he died about 5 years ago kind of built his life around catching them (unmarried, secretive, and more trout obsessed than is probably healthy).
I’ve made a few attempts in recent years, but really have not dedicated the time required.
That said, I did catch a young of year rainbow in Morgan run, a liberty reservoir trib, a few years back. Trout are genetically strange compared to a lot of creatures in that they have chromosomes that come not only in pairs, but sometimes in triples or more (multiploid, for those who have not had the good sense to move on to other posts).
This gives them a long shot chance at having the occasional unfertilized egg develop into an adult fish (parthenogenesis). It can also happen with frogs, but frogs are even stranger than fish.
So I rather want to believe the little rainbow I caught in Morgan run was the result of parthenogenesis. There are other explanations, but most are similarly long shots.
Back to the subject at hand: pray for rain. And snow.