Minimal body size for tagging fish with electronic microchips as studied in the Nile tilapia

Ouedraogo Christian, Canonne Marc, D'Cotta Helena, Baroiller Jean-François, Baras Etienne. 2014. Minimal body size for tagging fish with electronic microchips as studied in the Nile tilapia. North American Journal of Aquaculture, 76 (3) : 275-280.

Quartile : Q4, Sujet : FISHERIES

Résumé : Individual identification of fish is often desirable for the smallest possible size, but it is crucial that tagging does not interfere with fish survival, physiology, or behavior. We evaluated radio-frequency identification (RFID) tags (10 mg) and PIT tags (PIT; 32 mg) in fish of two different size-classes of Nile Tilapia Oreochromis niloticus: 200¿500 mg and 640¿1,600 mg, wet mass (WM). This produced four categories of tag load for each type of tag: 5.0, 3.3, 2.5, and 2.0% of WM. We tested 30 fish per category. Survival averaged 95.8% for RFID tags and 98.3% for PIT tags. Tag retention after 35 d was 99.1% for RFID tags and 96.6% for PIT tags. Tagged fish grew more slowly than controls. Growth penalty was proportional to tag load, but restricted to the first 4 d after tagging and compensated by catch-up growth, except in fish <300 mg presumably due to greater difficulties of handling and tagging. Small PIT tags can thus be used confidently in tilapia of about 1.3 g and RFID tags in tilapia of about 0.4 g. If growth is not a premium, the corresponding minimal sizes are 1.0 (for PIT) and 0.3 g (for RFID).

Mots-clés Agrovoc : Oreochromis niloticus

Mots-clés géographiques Agrovoc : Égypte, France

Classification Agris : M12 - Production de l'aquaculture
U30 - Méthodes de recherche

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Ouedraogo Christian, CIRAD-PERSYST (FRA)
• Canonne Marc, CIRAD-PERSYST-UMR INTREPID (FRA)
• D'Cotta Helena, CIRAD-PERSYST-UMR INTREPID (FRA) ORCID: 0000-0003-2739-3476
• Baroiller Jean-François, CIRAD-PERSYST-UMR INTREPID (FRA) ORCID: 0000-0002-0992-1725
• Baras Etienne, IRD (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574557/)

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