TABLE 5.
Mean difference in growth rate ± standard error, during the consecutive months (duration) of low conditions (starvation or cool water) for Polypterus senegalus and Pelusios castaneus.
Species | Polypterus senegalus | Pelusios castaneus | ||||
---|---|---|---|---|---|---|
Group | Control | Resource | Temperature | Control | Resource | Temperature |
n = 9 | n = 5 | n = 5 | n = 6 | n = 5 | n = 7 | |
Δ Mean difference in specific growth rate of the length (SGRL) ± SE (%/day) | ||||||
1 versus 2 month(s) duration | 0.04 ± 0.02 | 0.02 ± 0.01 | 0.01 ± 0.02 | |||
1 versus 3 month(s) duration | 0.02 ± 0.03 | 0.00 ± 0.03 | 0.04 ± 0.03 | 0.02 ± 0.03 | 0.03 ± 0.01 | 0.01 ± 0.02 |
2 versus 3 months duration | −0.02 ± 0.02 | 0.00 ± 0.01 | 0.01 ± 0.01 | |||
Δ Mean difference in specific growth rate of the weight (SGRW) ± SE (%/day) | ||||||
1‐ versus 2‐month(s) duration | 0.14 ± 0.06 | 0.15 ± 0.07 | 0.09 ± 0.04 | |||
1‐ versus 3‐month(s) duration | 0.27 ± 0.12 | 0.06 ± 0.10 | 0.18 ± 0.11 | 0.12 ± 0.08 | 0.10 ± 0.08 | 0.13 ± 0.06 |
2‐ versus 3‐month duration | −0.01 ± 0.05 | −0.05 ± 0.03 | 0.01 ± 0.04 |
Note: We aimed to identify growth rate differences between the second and seventh (1‐month duration), eighth (2‐month duration), and ninth (3‐month duration) months of the experiment for the Resource and Temperature groups. The growth rate of the 8th month is excluded from the analysis for Polypterus senegalus (see Section 2.3), therefore, we only compare the growth of the second + seventh and ninth months for this species. Values in bold: significant difference—p‐value ≤.05—between the mean growth rates recorded during the 2 months (linear mixed‐effects models and post hoc Tukey's tests); n—number of specimens per sample.