FOOD... IS A FOUR LETTER WORD [Archive] - Fly Fishing Forum

: FOOD... IS A FOUR LETTER WORD


DEERHAAWK
04-11-2005, 02:06 AM
FROM THE DESK OF THE BUG DOTOR
UNIVERSITY OF AIREAL DYNAMICS (UAD)
DEPARTMENT OF TURBULENCE (LIQUID AND GASEOUS)
BOWLSHIRT CREEK, NORTHWEST CENTRAL QUAD

Well things are starting to brighten up here on the banks of the beautiful Bowlshirt! And the O'l Doc has had mud up to his a... ah, elbows from muckin around in the depths, workin the old kick screen, turnin over rocks, tryin to see what in the blazes Trout eat!
Yeah, I know that they eat bugs, I mean I'm the Bug Doc! It says so right on my lab coat. I was on a quest to find out just what kind, and how many. While going through my vast library of books and papers on the subject, I ran across the latest Surfing issue, with a piece on page 139 pertaining to Silverfish.....very interesting I must say.
But I am getting side tracked, so lets get back to the subject at hand. Non-Anadromus (or in this case "local kine") fish populations around the world have a rather small feeding area compared to the greater land mass in general. Hence the food distribution system is small, and the fish have tuned into that adapting to a precise diet.
In my research, I concentrated on 3 particular studies. 2 were done here in the U.S. and the other in New Zealand.
The first by noted Research Fishery Biologist William R. Meehan written in 1996 and called Influence of Riparian Canopy on Macroinvertebrate Composition and Food Habits of Juvenile Salmonids in several Oregon Streams, showed that over a 3 year period "all aquatic sample types, including fish stomachs, confirmed that Diptera and Ephemeroptera were the predominant invertebrates". The fish stomach numbers are as follows:
Diptera - 18,774
Ephemeroptera - 11,237
Tricoptera - 4,767
Homoptera - 4,010
Plecoptera - 3,359
In a similar study by M. Dedual and K.J. Collier, Aspects of juvenile Rainbow Trout diet in relation to Food Supply during the summer in lower Tongariro River, New Zealand, for The Department of Conservation in New Zealand, the study confirmed that the stomach contents consisted of a whoping 74% Diptera! The only difference here being that Tricoptera was second at 19% and Ephemeroptera third at 6%.
The third study I think ties this all together, and was NOT conducted on fish. Called Nutrient and Energetic Charictaristics of Sweepnet Collected Invertebraytes by Robel, Press, Henning, Johnson, Blocker and Kemp of Kansas State University, this study was conducted on....BIRDS! And heres the deal. Diptera was part of there diet too!
Both Fish and Fowl have the same intrest in mind when it comes to food. Both will "Maxamize there net energy and chose there diet accordingly". This "Energy" derived from a particular food source, will directly effect the growth and health of the offspring. Animals have "Common" and "Prefered" food items, the latter being chosen for fat, or other particular content, Fat being the one that gives the most energy!
Same food, Two different Species, same outcome!!!! I LOVE THIS!
It just goes to show how important the balance of ALL Natures actions are to each other.
In conclusion, even though the fish have a narrow window for feeding, It is the same window that other animals rely on, just on a smaller scale.

The Bug Doctor

THIS ENDS THIS TRANSMISSION