Naucrates ductor (Linnaeus, 1758)
(Carangidae, Perciformes)
Circuntropical, no Atlântico ocidental ocorre da Nova Escócia até o norte da Argentina. Habita águas afastadas da costa e chega a atingir 70 cm. Alimenta-se de restos de animais e também de ectoparasitas dos animais que acompanha (cações, raias e outros peixes de pequeno porte, bem como tartarugas). Os jovens associam-se a medusas e algas (Menezes & Figueiredo, 1980).
The collection contains otoliths from 1 individuals of this species, ranging from 278 to 278 mm of total length. Click here to see the map of the sampling area for the individuals of this species. The following summaries contains data from 1 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Naucrates ductor, with total length of A. 278mm; internal side A1; external side A2; profile of the ventral region A3; click the figures for larger version*
Morphology:
Shape: hourglass. Anterior region: notched. Posterior region: notched. Dorsal edge: sinuate. Ventral edge: sinuate. Profile: plane-convex. Rostrum and antirostrum orientation: in agreement. Rostrum: Developed. Antirostrum: Developed. Pseudorostrum: Developed. Pseudoantirostrum: underdeveloped. Sulcus acusticus: position median, orientation horizontal, opening ostiocaudal, morphology pseudo-archaesulcoid, colliculum homomorphic, ostium absent, cauda absent.
Description of the terms used
Morphometry:
| Shape indices | Mean ± sd | Minimum | Maximum |
|---|---|---|---|
| OL / TL % | 0.77 ± 0.00 | 0.77 | 0.77 |
| OH / OL % | 57.28 ± 0.00 | 57.28 | 57.28 |
| OT / OL % | 15.49 ± 0.00 | 15.49 | 15.49 |
| OT / OH % | 27.05 ± 0.00 | 27.05 | 27.05 |
| Circularity | 23.28 ± 0.00 | 23.28 | 23.28 |
| Rectangularity | 0.63 ± 0.00 | 0.63 | 0.63 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.13.NADU.SARVII.CE.13.1 (278 mm)
For more information about this species: