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PUBBLICAZIONI MEDSUDMED |
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In questa sezione é possibile effettuare la ricerca dei documenti utilizzando
parole chiave, il nome dell'autore, il nome/numero della pubblicazione di
interesse.
Una ricerca più dettagliata è possibile effettuarla utilizzando i campi TITOLO
ed ABSTRACT.
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DOCUMENTO TECNICO |
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TITOLO: |
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GCP/RER/010/ITA/MSM-09 (MedSudMed Technical Documents n°9)
Report of the Workshop on Standardization of Fish Age Determination Based on Otolith Samples in the MedSudMed Project Area
Mazara del Vallo (Italy), April 2005 |
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1,8 MB |
Authors: |
FAO MedSudMed |
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Pages: |
46 |
Publication year: |
2005 |
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Keywords: |
Accuracy - age determination - data collections - data processing - growth - intercalibration - marine fish - methodology - otolith reading - precision - sampling - standardization |
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ABSTRACT: |
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The Workshop was attended by experts from Tunisia, Italy, Libya and Malta and an international expert on fish age determination, Ms Hélène de Pontual, from the Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER). The main objective of the workshop was to study the possibility of elaborating, a standard protocol on ageing in the MedSudMed Project area, based initially on two target species: Merluccius merluccius and Mullus barbatus. The current activities in the Project Area and an overview of the methods now used were presented, including existing national and international protocols and their principal technical characteristics regarding materials, methods, sampling design and data processing. Then the problems of standardizing age-reading methodology for the target species were discussed: choice of the hard structure, sampling, otolith extraction, otolith conservation, preparation techniques, accuracy and precision, validation etc. A laboratory exercise of age-reading techniques for Mullus barbatus was conducted to check the agereading agreement and precision among six readers. The average percentage agreement in respect of the modal age across all ages and readers in the comparison was 55.2% and the average coefficient of variation (CV) was 45.5%. The relative bias showed that all the readers tended to underestimate older age-classes. Finally, the participants agreed on a common protocol for age determination of the target species and proposed a future intercalibration exercise to assess the percentage agreement in age determination among readers. |
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ANNESSI CONTENUTI |
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TITOLO: |
ANNEX of GCP/RER/010/ITA/MSM-09 (MedSudMed Technical Documents n°9)
Age determination procedure for fishes at the Sclerochronology Laboratory of the INSTM |
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124 KB |
Authors: |
Gaamour, A. - Khemiri, S. |
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Pages: |
8 |
Publication year: |
2005 |
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Keywords: |
Age determination - data collections - marine fish - methodology - otolith reading - precision |
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TITOLO: |
ANNEX of GCP/RER/010/ITA/MSM-09 (MedSudMed Technical Documents n°9)
Summary of age-reading activities at the Marine Biology Research Centre, Tajura, Libyan Arab Jamahiriya |
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25 KB |
Authors: |
Mujahid, A. |
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Pages: |
2 |
Publication year: |
2005 |
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Keywords: |
Age determination - methodology - otolith reading - sampling - surveys - training |
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TITOLO: |
ANNEX of GCP/RER/010/ITA/MSM-09 (MedSudMed Technical Documents n°9)
Age estimation from “hard structures” of exploited marine organisms in the experience of CNR Centre of Mazara del Vallo: the procedures adopted and the maximum ages estimated |
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1,5 MB |
Authors: |
Badalucco, C. - Fiorentino, F. - Gancitano, S. - Rizzo, P. |
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Pages: |
10 |
Publication year: |
2005 |
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Keywords: |
Age determination - data collections - growth - marine resources - methodology - sampling |
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