Gymnothorax ocellatus Agassiz, 1831
(Muraenidae, Anguilliformes)
The collection contains otoliths from 52 individuals of this species, ranging from 339 to 586 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 29 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Gymnothorax ocellatus, with total length of A. 341mm; B. 550mm; internal side A1; B1; external side A2; B2; profile of the ventral region A3; B3; click the figures for larger version*
Morphology:
Shape: cuneiform (69%), elliptic to cuneiform (24%), elliptic (7%). Anterior region: double-peaked (41%), double-peaked-round (34%), blunt (21%), rounded (3%). Posterior region: peaked-round (21%), oblique-round (21%), oblique to peaked (17%), peaked (17%). Dorsal edge: sinuate to entire (38%), lobed to sinuate (24%), entire (24%), serrate to entire (14%). Ventral edge: lobed to sinuate (34%), sinuate to entire (34%), entire (31%). Profile: plane-convex. Rostrum and antirostrum orientation: in agreement (90%), not applicable (10%). Rostrum: underdeveloped (59%), Developed (31%), absent (10%). Antirostrum: underdeveloped (52%), Developed (45%), absent (3%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal, opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like, cauda straight tubular (62%), slightly curved tubular (38%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 0.84 ± 0.1 | 0.61 | 0.98 |
OH / OL % | 66.98 ± 6.05 | 54.55 | 81.67 |
OT / OL % | 24.84 ± 2.96 | 20.95 | 31.82 |
OT / OH % | 37.39 ± 5.69 | 29.37 | 50.24 |
Circularity | 15.90 ± 0.95 | 14.15 | 17.78 |
Rectangularity | 0.74 ± 0.02 | 0.69 | 0.81 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 3.3.GYOC.BAII.AF.1/1.2 (341 mm)
- 3.3.GYOC.REV.AF.1131.2 (550 mm)
For more information about this species: