Author/Authors :
SINGH, N.O. Directorate of Coldwater Fisheries Research, India , KUMAR, S. Kumaun University, DSB Campus - Department of Statistics, India , MAHANTA, P.C. Directorate of Coldwater Fisheries Research, India , SINGH, N.G. Central Agricultural University - Department of Statistics and Mathematics, India
Abstract :
Some growth models used in fisheries are inappropriate for use with species whose growth is seasonal due to the assumption that growth is invariant over time. A modified version of the logistic model that incorporates cyclical (or seasonal) fluctuations in growth gave significantly improved results when it was fitted to observations of length-at-age from Tor putitora. The modified logistic model was obtained by introducing a sine wave function into the original model.
