Eucinostomus melanopterus (Bleeker, 1863)
(Gerreidae, Perciformes)
The collection contains otoliths from 96 individuals of this species, ranging from 57 to 230 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 41 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Eucinostomus melanopterus, with total length of A. 60mm; B. 137mm; C. 214mm; 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: angled-round (85%), rounded (10%), peaked-round (5%). Posterior region: rounded (68%), angled-round (32%). Dorsal edge: sinuate to entire (73%), lobed to sinuate (15%), sinuate (7%), entire (5%). Ventral edge: sinuate (44%), lobed to sinuate (37%), sinuate to entire (15%), dentate to sinuate (5%). Profile: concave-convex. Rostrum and antirostrum orientation: in agreement (90%), not applicable (10%). Rostrum: Developed (90%), underdeveloped (10%). Antirostrum: Developed (73%), underdeveloped (17%), absent (10%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position supramedian, orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like, cauda markedly curved tubular (76%), bent tubular (24%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 3.20 ± 0.19 | 2.74 | 3.75 |
OH / OL % | 68.27 ± 4.14 | 60.92 | 75.69 |
OT / OL % | 21.81 ± 1.69 | 18.66 | 26.22 |
OT / OH % | 32.03 ± 2.7 | 27.01 | 38.82 |
Circularity | 18.04 ± 1.15 | 16.27 | 21.47 |
Rectangularity | 0.67 ± 0.02 | 0.61 | 0.71 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.17.EUME.BAIV.PC.2/1.3 (60 mm)
- 25.17.EUME.BAIV.AF.3/1.24 (137 mm)
- 25.17.EUME.BAIII.CER.2/1.2 (214 mm)
For more information about this species: