Trachurus lathami Nichols, 1920
(Carangidae, Perciformes)
Ocorre do Golfo do Maine ao norte da Argentina. Atinge 40 cm de comprimento e forma grandes cardumes em įguas relativamente afastadas da costa. Alimenta-se de pequenos invertebrados (Menezes & Figueiredo, 1980; Figueiredo et al, 2002; Bernardes et al., 2005).
The collection contains otoliths from 2061 individuals of this species, ranging from 17 to 208 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 91 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Trachurus lathami, with total length of A. 27mm; B. 126mm; C. 208mm; internal side A1; B1; C1; external side A2; B2; C2; profile of the ventral region A3; B3; C3; click the figures for larger version*
Morphology:
Shape: elliptic (76%), elliptic to lanceolated (24%). Anterior region: peaked-round (44%), angled-round (32%), lanceolated-round (24%). Posterior region: angled-round (51%), rounded (38%), peaked-round (11%). Dorsal edge: lobed to sinuate (64%), sinuate to entire (36%). Ventral edge: lobed to sinuate (51%), sinuate to entire (22%), sinuate (16%), lobed (11%). Profile: concave-convex (65%), plane-convex (35%). Rostrum and antirostrum orientation: not applicable. Rostrum: Developed (71%), underdeveloped (29%). Antirostrum: absent (95%), underdeveloped (5%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position supramedian (90%), median (10%), orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like, cauda slightly curved tubular (74%), strongly curved tubular (26%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 3.88 ± 0.35 | 3.07 | 5.97 |
OH / OL % | 57.20 ± 5.9 | 45.98 | 71.67 |
OT / OL % | 18.64 ± 2.08 | 13.36 | 24.68 |
OT / OH % | 32.66 ± 2.69 | 25.56 | 40.37 |
Circularity | 18.39 ± 1.3 | 15.75 | 22.64 |
Rectangularity | 0.65 ± 0.02 | 0.61 | 0.69 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.13.TRLA.SARV.AM.14.15 (27 mm)
- 25.13.TRLA.SARVI.AM.8.3 (126 mm)
- 25.13.TRLA.SARIV.AM.20.1 (208 mm)
For more information about this species: