Beads

[bindibadgi]

Hiya,

what do you use as your 'organisms' in the Lincoln Index capture-recapture prac?
I usually buy cannelini beans because they're cheap & white, so easy to mark with textas, but after a few classes have used them & marked with different coloured textas I throw them out, & I'm wondering if it would be better to get marbles or glass beads instead. That way I can just wash the texta marks off & use them year after year.

Any ideas?

Thanks,

[Ocker]

They are getting rarer these days, but we always used those polystyrene foam beads used for packing round equip.

[Rita]

We use two different coloured straws (green/white) cut to required size (1-2cm).
Have been using the same sets for 6 years with no problems.

[tuesday]

I agree with the straws, been using coloured ones cut to size for a few years now.

[Jen1]

how about coloured matchsticks, they are cheap to buy, already coloured and last for ever

[Rita]

Hi All

I have been asked for capture/recapture prac. (We use 6 sets of straws for 6 groups of students.) What numbers/ratio do you use in your sets?

Rita

[mikah]

Hi Rita,
we are doing this too and the set up sheet I was given says two different coloured counters 15:100

I found it all organised and labelled in a box, I have recently inherited a very well organised workplace....feeling lucky

[Rita]

Thank you ..... the numbers of straws are dwindling in each set so I had better top up.

[trish armstrong]

We use coloured match sticks as well.
Just soak them for 1 min in food colour lay on paper towel over night to dry. I just have a tub of each colour and when I notice getting down just make some more.
Cheap and easy.
Cheers Trish