Growth parameters with traditional and artificial neural networks methods of big-scale sand smelt (Atherina boyeri Risso, 1810)
SU URUNLERI DERGISI(2023)
Abstract
In this study, the growth parameters of big-scale sand smelt (Atherina boyeri Risso, 1810) in Iznik Lake has been determined with traditional (length weight relationships (LWRs), von Bertalanffy (VB), condition factor (CF)) and modern approaches (Artificial Neural Networks - ANNs). A total of 635 specimens (44.84% female and 55.16% male) were collected from the local fisherman during the hunting season between April 2018 to April 2019. Mean fork length (FL) (mm, min-max), mean W (g, min-max) and mean CF (value, min-max) were estimated as 67.31 mm (40.10 - 97.77 mm), 2.57g (0.53 - 7.50 g), and 0.790 (0.170-1.520) for all individuals. The length-weight relationships were determined W=0.00001437L(2.8602) for female, W=0.00001570L(2.8266) for male and W=0.00001328L(2.8717) for all individuals. The von Bertalanffy equations were determined L-t=136.218 [1-e((-0.240(t+0.51)))] for female, Lt=155.042 [1-e((-0.185(t+0.73)))] for male, and Lt=146.916 [1-e((-0.205(t+0.64)))] for all individuals. The values in training (MSE (Mean Squared Error) 4.52559e(-5), R (correlation coefficients) 9.09347e(-1)), verification (MSE 4.86111e(-5), R 9.00931e(-1)) and test data (MSE 3.391999e(-5), R 9.43465e(-1)) were found in calculations made with ANNs. It was determined that ANNs could be an alternative for evaluating growth estimation.
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Key words
Artificial Neural Networks,big-scale sand smelt,growth parameters,length weight relationships,von Bertalanffy
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