SUMMARY
A set of 62 spines of albacore (Thunnus alalunga) ranging from 41 to 111 cm fork length and collected from landings of Spanish commercial surface fleets during the 2003 fishing season in the North eastern Atlantic was aged by the authors. Albacore readings from this exchange were analysed for the fi...
| Main Authors: | , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.598.7891 http://www.iccat.int/Documents/CVSP/CV058_2005/no_4/CV058041235.pdf |
| Summary: | A set of 62 spines of albacore (Thunnus alalunga) ranging from 41 to 111 cm fork length and collected from landings of Spanish commercial surface fleets during the 2003 fishing season in the North eastern Atlantic was aged by the authors. Albacore readings from this exchange were analysed for the first time, using the EXCEL workbook developed by Eltink (2000) to estimate precision, accuracy and agreement of ageing. High overall agreement between readers is observed (82%) and highlights an agreement higher than 84 % in the first three ages. Related to the accuracy, a very low overall relative bias (-0.01) with slight under- and over-estimations were observed. Therefore it seems from the results obtained in this study that the ageing procedure followed (Bard and Compean 1980) based on annuli reading of spine section, could be transferred and applied a standard method for North Atlantic albacore age determination. RÉSUMÉ |
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