A simpls Spreadsheet Model to Incorporate Seasonal Growth into Length Based Stock Assessment Methods

摘要

The paper describes a method by which seasonal growth can be incorporated into length-converted catch curves and cohort analyses using a spreadsheet. The method is based on calculating the length offish using seasonal growth parameters on a daily basis. A LOOKUP function is then used to find the age corresponding to the length. Over the last decade, fisheries biologists working in tropical waters became increasingly familiar with 'length-based fish stock assessment', thanks to the development of easy-to-use software (such as LFSA, ELEFAN, FISAT,and LFDA); good training manuals (Sparre and Venema 1992, 1998); the worldwide FAO/DANIDA training course in Tropical Fish Stock Assessment; and the availability of relatively cheap computers.