
material for DIY plankton/baby brine net?
#1
Guest_mikez_*
Posted 02 January 2009 - 06:24 PM
I'd like to devise a plankton net which has a round rim measured to almost fill the six inch auger hole I use. I'd drop the net down below the hole and draw it up through when a good cloud of copepods have gathered.
The net material would have to be fine enough to stop even the smaller daphnia while not so fine that water won't easily flow through.
Any suggestions?
#2
Guest_PhilipKukulski_*
Posted 02 January 2009 - 07:41 PM
again,
I am appalled that the aquarium industry has sold brine shrimp nets for decades that let brine shrimp nauplii through.
I have used a home-made net for 8 years. The net is made from an old Speedo spandex swimsuit.
#3
Guest_fundulus_*
Posted 02 January 2009 - 07:47 PM
#4
Guest_Newt_*
Posted 02 January 2009 - 08:27 PM
#5
Guest_netmaker_*
Posted 02 January 2009 - 10:31 PM
Will a 750 micron mesh hold these critters?
Ever see a Tube Drop net?
Its a pvc pipe segment at 4" dia. x 5" in depth. A 750 micron "tube" is fashioned to the pvc frame and a 3 point bridle is tied on the front. It simply looks like a mini plankton net without the expensive collection bucket.
The 750 mic. tube is .25M long and hangs down.
The pvc is dropped into any hole or crack. You retrieve and the tube collects everything in its path.
The other suggestions are also very good and i am sure work well. The Tube Net is just a little more rugged for wear and tear.
sa va,
nm
#6
Guest_fundulus_*
Posted 02 January 2009 - 10:34 PM
And netmaker, the drift net I described is about 15 inches on a side, designed to be staked into a stream bed facing into the current using tent pegs slid into sleeves on the outside of the rig. I think the bag is about 18 inches deep. I haven't used it in a sustained situation yet, maybe I'll try that this spring and see what kind of ichthyoplankton is washing down Estill Fork of the Paint Rock River.
#7
Guest_mikez_*
Posted 03 January 2009 - 11:13 AM
How big are we talking in size of girth?
Will a 750 micron mesh hold these critters?
Ever see a Tube Drop net?
Its a pvc pipe segment at 4" dia. x 5" in depth. A 750 micron "tube" is fashioned to the pvc frame and a 3 point bridle is tied on the front. It simply looks like a mini plankton net without the expensive collection bucket.
The 750 mic. tube is .25M long and hangs down.
The pvc is dropped into any hole or crack. You retrieve and the tube collects everything in its path.
The other suggestions are also very good and i am sure work well. The Tube Net is just a little more rugged for wear and tear.
sa va,
nm
This sounds very like what I have in mind. The question at hand is, what do I make the screen from?
I was hoping to use material I might have around the house or can get locally.
Bruce where did you get the silk you used?
I'm fresh out of Speedo swimsuits at the moment but I'll keep that in mind.
Thanks!
#9
Guest_fundulus_*
Posted 03 January 2009 - 01:29 PM
#10
Guest_bflowers_*
Posted 03 January 2009 - 02:19 PM
I've not attempted what you're trying to do Mike so pardon my ignorance but woman's stockings seem like a relatively cheap way of trialing a material.
I have been able to stretch women's stockings over 4" PVC pipe. I was trying to make a daphnia collector to drag throgh the water. It worked fair. The problem I had was throwing it out and then keeping it in a parrallel position as I dragged it in. I would bet the stockings would stretch over a 6" PVC with no problem. I have also squeezed boiled egg yolk through stockings to feed fry.
Bill F.
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