Table 1
Biological parameters from three methods (2 LFA and 1 otoliths) of the stock O. niloticus stock using FiSAT II. The parameters are: predicted asymptotic length (L∞, Standard (SL) and Total Length (TL)), growth coefficient K, growth performance index φ’, and hypothetical length at which age is zero t0, the exploitation rate E, total coefficient of mortality Z, natural mortality M, and fishing mortality F. ID = insufficient data.
Paramètres biologiques pour trois méthode (2 LFA et 1 otolithe) du stock d’O. niloticus via FiSAT II. Les paramètres sont : longueur asymptotique prédite (L∞, standard (SL) et longueur totale (TL)), coefficient de croissance K, indice de performance de croissance φ’ et longueur hypothétique pour laquelle l’âge est égal à zéro t0, le taux d’exploitation E, coefficient total de mortalité Z, mortalité naturelle M et mortalité par pêche F. ID = données insuffisantes.
| Methods | SL∞ (cm) | TL∞ (cm) | K (year−1) | (φ’) | t0 (years) | E | Z/M/F (year−1) |
|---|---|---|---|---|---|---|---|
| Analysis of Length-at-age data (all fish) (N = 258, incl. 58 not sexed) | 45.47 | 55.61 | 0.14 | 2.636 | −0.28 | ||
| Analysis of Length-at-age data (♂Males) (93) | 43.81 | 53.58 | 0.14 | 2.604 | −0.47 | ||
| Analysis of Length-at-age data (♀Females) (107) | 31.75 | 38.83 | 0.23 | 2.540 | −1.17 | ||
| Length Frequency Distribution Analysis from fish landings (11 820) | 52.5 | 64.21 | 0.23 | 2.977 | 0.79 | 1.41/0.30/1.11 | |
| Length Frequency Distribution Analysis from experimental fishing (95) | 24.1 | 29.47 | 0.14 | 2.085 | ID | ID |
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