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Differences between the sagitta, lapillus and vertebra in estimating age and growth in juvenile Mediterranean dolphinfish (Coryphaena hippurus)

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dc.creator Morales-Nin, Beatriz
dc.creator Di Stefano, Mirella
dc.creator Potoschi, Antonio
dc.creator Massutí, Enric
dc.creator Rizzo, Pietro
dc.creator Gancitano, Salvatore
dc.date 2008-06-25T07:06:41Z
dc.date 2008-06-25T07:06:41Z
dc.date 1999
dc.date.accessioned 2017-01-31T01:47:16Z
dc.date.available 2017-01-31T01:47:16Z
dc.identifier Sci. Mar. 63(3-4): 327-336
dc.identifier 0214 - 8358 (print edition)
dc.identifier 1886 - 8134 (online edition)
dc.identifier http://hdl.handle.net/10261/5279
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5279
dc.description Publicación online disponible en: http://www.icm.csic.es/scimar/index.php
dc.description The otoliths (sagittae and lapilli) and the vertebral centra were evaluated as ageing structures in dolphinfish age 0 juveniles (17.2-72 cm FL) caught in the seasonal small-scale fisheries of Majorca and Sicily (western and central Mediterranean). Different structure preparation techniques were also tested. Mounting and polishing lapilli for preparing frontal sections required significantly less processing time than for the sagittae. The increments in lapillus were clearly visible from the primordium to the otolith margin, whereas the intermediate zone in the sagittae was more opaque and prevented the detection of all the increments. The back-calculated hatchdates for otolith ages showed a good correlation with the species reproduction in the area and provided indirect validation for the age determination. The vertebrae centra showed increments with higher periodicity than seasonal. A test of symmetry on the ages derived from the sagitta and vertebra of the same fish indicated that the vertebra significantly underestimated the age. Considering the structure processing time and increment definition, as well as the age-length relationships obtained, it was concluded that the lapilli were the best ageing structure for juvenile dolphinfish. However, validation experiments should be carried out before the accuracy of this method can be determined.
dc.description This work is a result of two projects sponsored by the EU DG XIV (Biological Studies Ref. 94/031 and 95/73). Mr. J. Moranta and Ms. E. Batanero (IMEDEA) are thanked for their help in data analysis and manuscript typing respectively. Dr. R. L. Radtke (University of Hawaii) provided useful advice on otolith preparation and interpretation during a sabbatical visit to IMEDEA, granted by the Spanish Education Ministry, and Dr. C. Rodgers revised the English version of the manuscript.
dc.description Peer reviewed
dc.format 625897 bytes
dc.format application/pdf
dc.language eng
dc.publisher CSIC - Instituto de Ciencias del Mar (ICM)
dc.rights openAccess
dc.subject age determination
dc.subject Otoliths
dc.subject Daily increments
dc.subject Vertebral centra
dc.subject Growth
dc.subject Coryphaena hippurus
dc.subject Mediterranean
dc.title Differences between the sagitta, lapillus and vertebra in estimating age and growth in juvenile Mediterranean dolphinfish (Coryphaena hippurus)
dc.type Artículo

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