Anchoa tricolor (Agassiz, 1829)
(Engraulidae, Clupeiformes)
The collection contains otoliths from 297 individuals of this species, ranging from 35 to 129 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 32 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Anchoa tricolor, with total length of A. 43mm; B. 86mm; C. 129mm; 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. Anterior region: peaked (78%), peaked-round (19%), angled (3%). Posterior region: rounded (66%), angled-round (34%). Dorsal edge: entire (56%), sinuate to entire (44%). Ventral edge: sinuate to entire (34%), sinuate to serrate (25%), sinuate (19%), entire to serrate (13%). Profile: flattened (44%), concave-convex (28%), plane-convex (28%). Rostrum and antirostrum orientation: in agreement (84%), not applicable (16%). Rostrum: Developed. Antirostrum: Developed (56%), underdeveloped (28%), absent (16%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like, cauda elliptic.
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.75 ± 0.28 | 2.17 | 3.52 |
OH / OL % | 59.81 ± 4.43 | 49.39 | 67.27 |
OT / OL % | 20.22 ± 1.92 | 16.36 | 24.55 |
OT / OH % | 33.79 ± 1.74 | 29.93 | 36.99 |
Circularity | 17.48 ± 1.43 | 15.10 | 21.82 |
Rectangularity | 0.70 ± 0.02 | 0.66 | 0.74 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 5.1.ANTR.SARVII.AM.13.110 (43 mm)
- 5.1.ANTR.SARVII.AM.5.81 (86 mm)
- 5.1.ANTR.SARII.AM.14.15 (129 mm)
For more information about this species: