Shifting line index based on a specific criteria Matlab

Question

I have a table similar to the one above. For each species, I have the growth rate of year1 to 100. Suppose the table is called Data_Table. I have to shift the index of growth rate column for each species based on a criteria. For instance,

if criteria 
First_Index = Incubation - x;
 else 
First_Index = Incubation - x + 1;
end

First index can take value 1 or 2.

If it is equal to 1, the growth rate for the species should not change. If it is equal to 2, the second growth rate becomes the first growth rate, the 3rd growth rate becomes the 2nd and so on ..

Data_Table(1,'Growth_Rate') = Data_Table(First_Index, 'Growth_Rate');

Any idea on how I can do that simply on Matlab without touching the other columns ? Circshift as written below is completely messing up the data in data_table.

  Data_Table(:,'Growth_Rate') = circshift(Data_Table(:, 'Growth_Rate'),First_Index);

Thanks in advance