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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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WiScott
Posts: 1
WiScott on Aug 29, 2016August 29th, 2016, 2:28 pm EDT
I have never caught a tiger before. I am fairly certain this is a first for me. Clarify please.
TimCat
TimCat's profile picture
Alanson, MI

Posts: 121
TimCat on Aug 29, 2016August 29th, 2016, 4:33 pm EDT
I've read the Tiger is a sterile hybrid trout between a brook and brown trout. They can't mate, kind of like a donkey (a cross between a horse and a mule?). Word is that they are very rare naturally, but some govt. organizations stock them after breeding them in the hatcheries. They are supposedly larger like the browns, but have the voracious appetites of a brook trout. I've never caught one myself, but have only seen pictures and read about them. They are definitely a cool looking fish (like all trout). I'm sure google and/or your Wisconson DNR's site could give you some info on which rivers are stocked with them. Technically any river with browns and brookies could hold them.
"If I'm not going to catch anything, then I 'd rather not catch anything on flies" - Bob Lawless
Jmd123
Jmd123's profile picture
Oscoda, MI

Posts: 2474
Jmd123 on Aug 29, 2016August 29th, 2016, 7:16 pm EDT
Do a search on here, there were a few stories posted on tiger trout not too long ago, and there was quite a discussion about them.

Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...
Kschaefer3
Kschaefer3's profile picture
St. Paul, MN

Posts: 376
Kschaefer3 on Sep 1, 2016September 1st, 2016, 11:08 am EDT
Nowhere in the Driftless, that I'm aware of, stocks tigers. They occur naturally however, and have seemed to be quite abundant this year.
Wbranch
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Sep 6, 2016September 6th, 2016, 4:44 pm EDT
Kyle wrote;

They occur naturally however, and have seemed to be quite abundant this year.


Yes, it is true that they do occur naturally however I've been told by NYS biologists that natural reproduction is very rare. Maybe the brown and brook trout in the Driftless waters are just more predisposed to cross traditional same species breeding and take a step over to the wild side.
Catskill fly fisher for fifty-five years.
TimCat
TimCat's profile picture
Alanson, MI

Posts: 121
TimCat on Sep 6, 2016September 6th, 2016, 7:35 pm EDT
The wiki site for tiger trout says that they are bred in captivity by using brook trout milt with brown trout eggs, which leads me to assume this is how it happens in the wild most often (if not the only possibility). Apparently the driftless area brook trout populations are rising. This along with the smaller streams in the driftless, and the fact that brookies generally live in the headwaters areas, makes me think that maybe there is more brook trout milt floating downstream on the occasional brown trout egg, with a higher chance because of the confined waters/increased brookie numbers (?).

Either way, it must be pretty cool to catch a wild tiger trout.
"If I'm not going to catch anything, then I 'd rather not catch anything on flies" - Bob Lawless
Wbranch
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Sep 6, 2016September 6th, 2016, 10:48 pm EDT
TimCat wrote;

makes me think that maybe there is more brook trout milt floating downstream on the occasional brown trout egg


That is an interesting hypothesis. I wonder though how long the brook trout milt remains viable as it is diluted in the water as it flows downstream. I would think it would need to locate a brown trout egg quite quickly.

In sixty-one years of trout fishing I have only caught four tiger trout. One in NJ when I was a kid and snuck up a feeder stream to the Musconetcong River that came out of the trout hatchery. The little stream was just full of hatchery escapees. My buddy and I caught over a 100 trout in a couple of hours on worms and one of them was a 15" tiger. I caught two other 10" tigers a few years ago on the Little Juniata right near the bridge near Alexandria. My biggest was a tiger of 17.38" that I caught on a streamer in the WB of the Delaware and is the only one that may have been wild.
Catskill fly fisher for fifty-five years.

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