A simple approach is introduced to estimate the natural mortality rate (M) of fish stocks. The approach is based on the … age at maximum cohort biomass, or critical length (L*) concept. The ratio of the critical length to the asymptotic length … ( = L*/L8) is relatively constant in 141 fish stocks at 0.62 (CV = 21.4 per cent) and the relationship M = 3K(1- )/ is …

An attempt to fit the von Bertalanffy growth equation to three species of deep sea snappers using the ELEFAN method was … length and Z/K using a Wetherall plot. Possible approaches to resolving those difficulties are discussed. …

The parameter L8 and K of the von Bertalanffy growth equation were estimated from length-frequency data of teh spangled …

Catch-per-effort and length-frequency data on threadfin bream Nemipterus japonicus (Nemipteridae) supplied by the staff … growth parameters L8 and K that were estimated are compared with estimates from other areas of the Indo-Pacific. …