All:
- With respect to "stomach pumps" for trout. You are only obtaining the contents of the esophagus and not the actual stomach contents.
- The apparatus used is quite similar to the aspirator used to expell mucus from a new born baby's mouth just after birth.
- To use, squeeze the bulb end and let it fill with water from the stream. Then insert the tube end into the mouth and gently squeeze water into the trout's mouth. This will cause the epiglottis (the throat part of the trout) to open up.
- Next, you insert the tube another 1/2 to 1 inch and let go of the bulb. This will cause a suction force and will cause the material in the "throat" to be suctioned up into the bulb.
- Next, remove the apparatus from the trout and release said trout. Squeeze contents of bulb into hand.
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- Some notes:
- First, stomach pumps do not work well on trout under 10 or so inches as the tube is too big, and often you do not get any contents in return.
- Second, the whole operation should take under 15 seconds. If the back of the throat does not open up after the initial squeeze of water from the bulb, then just let the fish go. It's doubtful that the back of the throat is going to open up.
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- Where this has helped:
- The Bighorn and Green Rivers...proof that midges rule. A size #14 pheasant tail that slams fish on Spring Creek in Centre County is fairly worthless on the above Western rivers (my opinion). Instead, what I learned was to go with size 20 and smaller midges for the above mentioned tailwaters.
- One reason these fish grow so big out west is that they are literally gorged with midge pupae. One trout will typically "give up" about 200 midge pupae in a sampling. Unreal!!!!
- One other thing learned. The trout on Spring Creek are jammed with those big black carpenter ants on those hot muggy June and July mornings. An average 12 to 14" brown on Spring Creek will turn up 25 to 50 carpenter ants in a typical sampling.
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- Ethical dilemna:
- I'll leave it to you guys to debate whether the abobe mentioned stomach sampling harms the fishery.
- Personally, you only need one squeeze of the bulb to get a good sampling. Also, you only need to sample 1 or 2 trout (again, over 12 inches) to get an idea of what is going on. Also, don't stand their and keep trying to get a sample. If you don't get one on the first squeeze of the bulb, then forget it and go with another fish.
- Hope this helps.
John Coxey
(Syracuse, NY, USA)