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Growth of Juvenile Asian Seabass, Lates calcarifer (Bloch): An Application of Generalized Non-Linear Growth Model
Abstract
Growth models are critical in the development of innovative and sustainable management strategies in aquaculture. This paper utilizes Schnute’s generalized non-linear growth model to age –length data of the Juvenile Asian seabass, Lates calcarifer (Bloch) under culture conditions. Steps involved in fitting the non-linear growth model were outlined. Differential growth is observed among the individuals of the same age group of the sampled data. It is observed that variance of length measurements increased over age indicating heteroscedastic nature of the data. The effect of error structure is investigated by considering additive and multiplicative errors for fitting the Schnute’s Generalized nonlinear growth model to the data. The shape of the fitted curves suggested that the practical difference is minor within the range of the observed ages. However, based on the goodness-fit-statistics, correlation structure of parameter estimates it is concluded that growth model with multiple error fitted well for the growth of juvenile Asian seabass, Lates calcarifer (Bloch) under culture conditions.
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