Sagittal otoliths description of Perciformes from Southeastern-South Brazil
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1
Instituto Oceanográfico da Universidade de São Paulo IO-USP, Brazil
The Collection of Teleostei Fish Otoliths of the Southeastern-Southern of Brazil (COSS-Brasil) headquartered at the Oceanographic Institute, (IOUSP) contains 65 species of Perciformes included in 30 families. In order to spread the modus operandi of the adopted analysis for the main characteristics of the sagittae we presented the results obtained for the families Centropomidae, Acropomatidae and Gerreidae. The classification of the otoliths morphological features followed Assis (2004) and Tuset et al. (2008). Fifteen features were analyzed and after, the frequency of the different types was calculated within and among each length classes of 20 mm. Statistical differences were analyzed by multiple χ2 tests (p>.0.05). The morphometric analysis included circularity and rectangularity. The main characteristics of the Centropomidae sagittae were: Shape: elliptic to trapezoidal; Posterior region: oblique or round; Sulcus acusticus: position median; orientation horizontal; morphology heterosulcoid; colliculum heteromorphic; ostium elliptic or rectangular; cauda tubular strongly curved; Circularity: 15.41 - 27.78; Rectangularity: 0.70 - 0.76. For the Acropomatidae we found: Anterior region: peaked; Dorsal edge: lobed to sinuate or sinuate to entire; Ventral edge: sinuate to entire; Sulcus acusticus: position median; orientation ascending or horizontal; opening ostial; morphology heterosulcoid; colliculum heteromorphic; ostium funnel-like or elliptic; Circularity: 15.75 - 19.77; Rectangularity: 0.60 - 0.74. The main characteristics of the Gerreidae were: Shape: elliptic; Anterior region: angled-round or peaked-round; Sulcus acusticus: position median or supramedian; orientation descending or horizontal; opening ostial; morphology heterosulcoid; colliculum heteromorphic; ostium funnel-like; Circularity: 14.11 - 22.86; Rectangularity: 0.53 - 0.74. We are preparing a practical guide of all the species of the collection including morphological, morphometric, draws, photos and shape indices providing a complete guide of the teleost fishes’ otoliths from the South Atlantic.
Acknowledgements
Supporting Agency: Fundação de Amparo à Pesquisa do Estado de São Paulo – FAPESP.
References
Assis, C. A. 2004. Guia para a identificação de algumas Famílias de peixes ósseos de Portugal continental, através da morfologia dos seus otólitos sagitta. Câmara Municipal de Cascais, Cascais. Camara municipal de Cascais. 190p.
Tuset, V. M.; Lombarte, A; Assis, C. A. 2008. Otolith atlas for the western Mediterranean, north and central eastern Atlantic. Scientia Marina Espanha 72 (1): 7-198.
Keywords:
morphology,
morphometric,
sagittae,
otoliths collection,
Perciformes
Conference:
XV European Congress of Ichthyology, Porto, Portugal, 7 Sep - 11 Sep, 2015.
Presentation Type:
Poster Presentation
Topic:
Otoliths as a tool to study fish life cycles
Citation:
Santificetur
C,
R. M. Conversani
V and
L. D. B. Rossi-Wongtschowski
C
(2015). Sagittal otoliths description of Perciformes from Southeastern-South Brazil.
Front. Mar. Sci.
Conference Abstract:
XV European Congress of Ichthyology.
doi: 10.3389/conf.FMARS.2015.03.00197
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Received:
25 Nov 2015;
Published Online:
02 Dec 2015.
*
Correspondence:
Mr. César Santificetur, Instituto Oceanográfico da Universidade de São Paulo IO-USP, São Paulo, São Paulo, 05508-120, Brazil, csantificetur@hotmail.com