count the number of prawns in pond

i want to count the number of prawns in the pond generally the water in the pond is muddy. i want a sensor to find the count in the ponds and their size.

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  • Anybody ever tried a Ping under water?
    Re-inventing the wheel is not a waste of time if, when you are done, you understand why it is round.
    Cool, CA, USA 95614
  • Yes the Germans and British in WW II 1944
    Destroyers and U-boot fights.
    :innocent:
  • How much are you willing to spend to accomplish this?
    Founder of Kinvert
    https://www.kinvert.com/
  • The first thought is a murky pond ringed with cattails and half submerged fallen trees. Or maybe a rocky wide spot in stream with lots of scattered rocks. I'm sure a good field biologist could come up with a sampling scheme, but...

    ... could it be that this pond is a circular tray 3 meters in diameter with water uniformly 10cm deep and with controlled circulation and prefab hiding places? Okay, still a tough order to count them with "a sensor" who is not a human with eyes and hands!



  • ... could it be that this pond is a circular tray 3 meters in diameter with water uniformly 10cm deep and with controlled circulation and prefab hiding places? Okay, still a tough order to count them with "a sensor" who is not a human with eyes and hands!

    That one is easy! Just count the number you put in the "pond" in the first place! :D
  • :lol: But aquaculture, they reproduce!?
  • Not an answer, but some interesting information here:

    "A highly sensitive underwater video system for use in turbid aquaculture ponds"

    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4995459/

  • Easy to ask. Hard to do in practice.

    So much easier and tastier to count the number of prawns on my plate. N approaches zero as T increases.
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • erco wrote: »
    Easy to ask. Hard to do in practice.

    So much easier and tastier to count the number of prawns on my plate. N approaches zero as T increases.

    Erco - you want to pursue a career in neural research using the California spiny lobster.

    http://ucsdnews.ucsd.edu/archive/newsrel/science/alobster.htm

    I remember hearing about this sort of thing years ago, and the researchers were very good about properly recycling the lobsters.
  • Here's how it's done with fish:

    http://sciencing.com/shock-pond-determine-quantity-fish-7766332.html

    Maybe it will work with prawns.

    -Phil
    “Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away. -Antoine de Saint-Exupery
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