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Barramundi cannibalism

Discussion in 'Fish' started by Robin, Oct 18, 2014.

  1. Robin

    Robin New Member

    Joined:
    Oct 18, 2014
    Messages:
    2
    I am hoping to set up my next AP system with Barras.

    I know they are cannibalistic, especially at a young age. Somewhere I remember reading that if the smaller size is larger than 2/3 of big size then no problem, but I don't know if this was at the fry, fingerling, or grow out stage.

    1. I am assuming that realistically I cannot have multiple cohorts (age groups) in one tank? Anyone have a view on this? The negative impact of this would mean more tanks than I want - an inefficient system.

    2. Does anyone have a resource for grading screens/bars, and/or measurements for making your own so I can separate them into size groups.

    Thanks in advance
     
  2. Yabbies4me

    Yabbies4me Administrator Staff Member

    Joined:
    Jul 27, 2010
    Messages:
    5,881
    Country:
    Australia
    State:
    W.A.
    City:
    Perth
    Can you even get Barra fingerlings there?

    Barra need a water temp over 20C (68F), preferably 25-28C (77-83F), for 6 months to get them to plate size, will you be able to achieve this in Seattle?
     
  3. Robin

    Robin New Member

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    Oct 18, 2014
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    2
    Short answer, Yes and Yes. The latter due to the fact that this will be an indoor system. Just as a side comment: there is an 800 ton p.a. aquaculture facility growing barras indoors in Massachusetts
     
  4. yoodles

    yoodles VIP Supporter

    Joined:
    Nov 17, 2013
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    Country:
    Australia
    State:
    SA
    City:
    Mount Barker
    you can, it will save you feeding the bigger ones for a couple of days!

    Barra have the sort of notion of "if i can fit it in my mouth its food"
     
  5. kaiser

    kaiser New Member

    Joined:
    Apr 30, 2013
    Messages:
    14
    They don't cannibalise much from 10cm in length.
     

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