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Table 2. Mean (± SE) tilapia yields, Clarias yields, average weights by species, and survival for cool- and warm-season trials of the experiment on optimum nitrogen fertilization (CRSP global experiment) at Sagana Fish Farm, Sagana, Kenya.
Table 2

** highly significant (p < 0.01)
* significant (p < 0.05)

models used in Tables 2 and 3:
linear: y=a+bx
exponential: y=exp(a+bx)
sq. root y: y=(a+bx)2
sq. root x: y=a+bx1/2
reciprocal-y y=(a+bx)-1
quadratic: y=a+bx+cx2