Archosargus rhomboidalis (Linnaeus, 1758)
(Sparidae, Perciformes)
The collection contains otoliths from 39 individuals of this species, ranging from 115 to 160 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 22 analysed otoliths. See more detailed data here (in portuguese).
Otoliths from Archosargus rhomboidalis, with total length of A. 115mm; B. 160mm; internal side A1; B1; external side A2; B2; profile of the ventral region A3; B3; click the figures for larger version*
Morphology:
Shape: elliptic (77%), elliptic to triangular (23%). Anterior region: peaked-round (41%), oblique (36%), angled-round (23%). Posterior region: oblique-round (45%), rounded (36%), oblique (18%). Dorsal edge: crenate to sinuate (50%), sinuate to entire (18%), lobed to sinuate (18%), crenate to entire (9%). Ventral edge: sinuate to entire. Profile: concave-convex. Rostrum and antirostrum orientation: in agreement (50%), not applicable (50%). Rostrum: Developed (82%), underdeveloped (18%). Antirostrum: absent (50%), underdeveloped (36%), Developed (14%). Pseudorostrum: absent. Pseudoantirostrum: absent. Sulcus acusticus: position median, orientation horizontal (55%), descending (45%), opening ostial, morphology heterosulcoid, colliculum heteromorphic, ostium funnel-like, cauda strongly curved tubular (59%), markedly curved tubular (32%), slightly curved tubular (9%).
Description of the terms used
Morphometry:
Shape indices | Mean ± sd | Minimum | Maximum |
---|---|---|---|
OL / TL % | 2.94 ± 0.22 | 2.53 | 3.54 |
OH / OL % | 67.10 ± 2.68 | 62.44 | 71.85 |
OT / OL % | 16.58 ± 1.27 | 15.01 | 20.11 |
OT / OH % | 24.72 ± 1.67 | 21.77 | 27.99 |
Circularity | 18.73 ± 1.19 | 16.80 | 20.67 |
Rectangularity | 0.69 ± 0.01 | 0.67 | 0.71 |
* Vouchers:
Collection identifier for the individuals shown on photography and drawings:
- 25.20.ARRH.BAI.AF.3/1.11 (115 mm)
- 25.20.ARRH.BAI.AF.1/1.4 (160 mm)
For more information about this species: