+ Reply to Thread
Results 1 to 2 of 2

Thread: Metal accumulation dependence on weight and pollution

  1. #1
    Points: 18, Level: 1
    Level completed: 35%, Points required for next Level: 32

    Posts
    4
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Metal accumulation dependence on weight and pollution




    I'm working on metal accumulation in two landsnail species and it includes their kidneys and feet. I have concentrations of 7 metals in these organs and I need to check, if accumulation depends on weight. I tried to categorise snails into 3 weight groups within species, then I took a sum of conc. of metals in each snail (conc. of all metals in kidney + conc. of all metals in foot) and used Kruskal - wallis test. I don't know if it is correct and how to check dependence of every metal separately.
    Also, I need to check, if metal accumulation in snails depends on pollution of the site. There will be 3 pollution categories, too. Which tests and how should I use?
    I am using Statistica 10 and GraphPad prism 7 programs.

  2. #2
    Points: 2,462, Level: 30
    Level completed: 8%, Points required for next Level: 138

    Posts
    200
    Thanks
    20
    Thanked 48 Times in 43 Posts

    Re: Metal accumulation dependence on weight and pollution


    Hi, as far as I see you have a continuous outcome-variable (for each metal type the concetration) and as predictors you have (1) organ (categorical: kidney / feet) (2) species (categorical), (3) weight (continuous), and (4) pollution (categorical). What you can do is an ANCOVA for each metal type. Kruskal-Wallis is also OK, but you probably loose sharpness by converting continuous variables to categorical ones...

+ Reply to Thread

           




Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats