Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/105091
Title: Determination of the unknown age at first capture of western rock lobsters (Panulirus cygnus) by random effects model
Authors: Cheng, Y.W.
Kuk, A.Y.C. 
Keywords: Autoregressive process
Random effects
Trivariate normal distribution
Von Bertalanffy growth curve
Issue Date: 2002
Citation: Cheng, Y.W.,Kuk, A.Y.C. (2002). Determination of the unknown age at first capture of western rock lobsters (Panulirus cygnus) by random effects model. Biometrics 58 (2) : 459-462. ScholarBank@NUS Repository.
Abstract: We propose a method for fitting growth curves to multiple recapture data of lobsters when the age at first capture is unknown. The von Bertalanffy growth curve is used to model the growth. To account for individual variability, the unknown age in logarithmic scale of a lobster at first capture, the individual asymptotic size, and the individual growth coefficient of its carapace length are modeled as random effects with a trivariate normal distribution. Unlike previously suggested models, the present model permits correlation between the growth coefficient and the age at first capture and can be fitted readily using existing software. The error structures between consecutive recaptures of a lobster are assumed to be a first-order autoregressive process with unequally spaced time points. A comparison between this model and the Fabens growth equation is given. The proposed method is a flexible method and can be applied to fit different growth equations when the age at first capture is unknown.
Source Title: Biometrics
URI: http://scholarbank.nus.edu.sg/handle/10635/105091
ISSN: 0006341X
Appears in Collections:Staff Publications

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