Table 2 Growth related traits (weight, length, width and depth), body condition, food conversion ratio, survival, sexual maturity and deformity of fish reared in saline water and freshwater environments in the latest generation in 2014 (Least squares means ± S.E).

From: Does selection in a challenging environment produce Nile tilapia genotypes that can thrive in a range of production systems?

Traits

Model

Saline water

Freshwater

Significant probability

Weight (g)

LMM

256.9 ± 1.09

226.9 ± 1.05

<0.001

Length (cm)

LMM

23.1 ± 0.03

22.5 ± 0.03

<0.001

Width (cm)

LMM

3.4 ± 0.01

3.2 ± 0.01

<0.001

Depth (cm)

LMM

7.5 ± 0.01

7.2 ± 0.01

<0.001

Body condition (ratio)

LMM

19.4 ± 0.04

20.4 ± 0.04

<0.001

Body condition (ratio)*

LMM

4.4 ± 0.009

4.7 ± 0.003

<0.001

FCR (unit)

LMM

1.08 ± 0.008

1.89 ± 0.008

<0.001

Survival (%)

GLMM

80.7 ± 0.66

86.6 ± 0.56

<0.001

Maturity (%)

GLMM

83.9 ± 0.69

89.5 ± 0.55

<0.001

Deformity (%)

GLMM

0.12 ± 0.06

0.17 ± 0.08

NS

  1. NS = Non-significance, *Body condition also analysed on square root scale.
  2. LMM = Linear Mixed Model and GLMM = Generalised Linear Mixed Model.
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