Table 1. Summary of life-history trait estimates for three commercially harvested species from American Samoa.
| L. xanthochilus | L. gibbus | L. rufolineatus | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Males | Females | Combined | Males | Females | Combined | Males | Females | Combined | |
| L∞ (cm) | 40.5 (39.7–41.3) | 39.6 (38.3–40.9 | 40.2 (39.5–40.9) | 38.8 (37.6–40.1) | 28.9 (28.4–29.4) | 32.9 (25.9–37.9) | 23.3 (22.7–23.9) | 21.8 (20.8–22.9) | 22.9 (22.4–23.5) |
| K (year−1) | 0.63 (0.56–0.72) | 0.67 (0.59–0.76) | 0.64 (0.59–0.69) | 0.32 (0.29–0.35) | 0.66 (0.58–0.79) | 0.46 (0.20–0.73) | 0.80 (0.69–0.96) | 0.86 (0.64–1.18) | 0.82 (0.70–0.99) |
| t0 (year) | −0.12 | −0.12 | −0.12 | −0.29 | −0.19 | −0.25 | −0.20 | −0.20 | −0.20 |
| n aged | 98 | 137 | 236 | 119 | 117 | 236 | 105 | 29 | 134 |
| L50 (cm) | – | 30.0 (27.3–31.8) | – | – | 24.9 (23.5–25.8) | – | – | 16.4 (14.6–18.1) | – |
| L95 (cm) | – | 39.9 (35.9–43.9) | – | – | 29.0 (27.5–30.4) | – | – | 23.5 (21.2–25.9) | – |
| t50 (cm) | – | 2.1 (1.8–2.3) | – | – | 3.2 (2.9–3.9) | – | – | – | – |
| t95 (cm) | – | 4.7 (4.1–5.1) | – | – | 4.8 (4.5–5.8) | – | – | – | – |
| Z (year−1) | – | – | 0.35 (0.29–0.41) | – | – | 0.22 (0.19–0.26) | – | – | 0.54 (0.44–0.75) |
| M (year−1) | – | – | 0.22 | – | – | 0.15 | – | – | 0.35 |
Notes:
Associated 95% confidence intervals are presented in parentheses where appropriate.
L∞, asymptotic length; K, growth coefficient; t0, hypothetical age when length equals zero; n aged, number of specimens used in age analysis; L50, length at 50% sexual maturity; L95, length at 95% sexual maturity; t50, age at 50% sexual maturity; t95, age at 95% sexual maturity; Z, instantaneous total mortality rate estimated from the logistic multinomial catch curve; M, natural mortality rate estimated from Hoenig’s (1983) method.