DSpace - Tor Vergata: Item 2108/925

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Title:	New insights into fish growth parameters estimation by means of length-based methods
Authors:	Cataudella, Stefano Magnifico, Giuseppe
Keywords:	growth length-frequency analysis histogram bandwidth expectation-maximization mullus barbatus merluccius merluccius
Issue Date:	14-Jul-2009
Abstract:	Growth studies are an essential instrument in the management of fisheries resources since they contribute to estimates of production, stock size, recruitment and mortality of fish populations. In the event that age becomes too complex to be established through an observation of hard parts (otoliths, scales, opercula, rays, spines and vertebrae), information about the demographic parameters of fish and other animal populations can be obtained by length-frequency analysis. Length-frequency distributions are commonly analyzed by means of histograms, although they present several problems, such as a dependency on the origin, width and number of class intervals, discontinuity of data and fixed bandwidth. This can largely affect the reliability of the estimates, i.e. the results become dependent upon the data massage operated by the user. The main aim of this research study was an attempt to contribute to overcome some of the abovementioned limits. Two algorithms were tested in term...
Description:	19.ciclo
URI:	http://hdl.handle.net/2108/925
Appears in Collections:	Tesi di dottorato in scienze matematiche e fisiche

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