Trichiurus lepturus Linnaeus, 1758
(Trichiuridae, Perciformes)
The collection contains otoliths from 1315 individuals of this species, ranging from 104 to 1825 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 158 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Trichiurus lepturus, with total length of A. 143mm; B. 903mm; C. 1825mm; 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: fusiform. Anterior region: peaked. Posterior region: blunt to peaked (56%), peaked-round (38%), peaked (5%), angled (1%). Dorsal edge: sinuate (89%), lobed to sinuate (11%). Ventral edge: sinuate (69%), lobed to sinuate (24%), lobed (4%), entire (3%). Profile: concave-convex. Rostrum and antirostrum orientation: in agreement (72%), not applicable (28%). Rostrum: Developed. Antirostrum: underdeveloped (61%), absent (28%), Developed (11%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like (98%), elliptic (2%), cauda straight tubular.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 0.78 ± 0.26 | 0.40 | 2.42 |
OH / OL % | 38.97 ± 1.99 | 32.80 | 44.67 |
OT / OL % | 19.02 ± 1.65 | 14.96 | 23.63 |
OT / OH % | 48.83 ± 3.65 | 38.51 | 57.70 |
Circularity | 20.48 ± 1.24 | 18.51 | 28.63 |
Rectangularity | 0.70 ± 0.02 | 0.66 | 0.75 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.56.TRLE.SARVII.CE.15.25 (143 mm)
- 25.56.TRLE.REV.AF.1007.19 (903 mm)
- 25.56.TRLE.REV.AF.601.7 (1825 mm)
For more information about this species: