Ecomorphological patterns of the sagitta in fish on the continental shelf off Argentine

By A. Volpedo. 2003

162 citations recorded by the source corpus.

Abstract Morphology and morphometry of the sagittae otolith were studied in fish associated with different substrates. The shape, margins and rostrum of three groups of otoliths from several species were analyzed: group 1 (fish associated with soft substrates, N =10 species), group 2 (fish associated with hard substrates, N =10 species) and group 3 (pelagic fish, not associated with the bottom, N =6 species). E and R indexes were calculated for each species. The value of E =maximum width of the sagitta (WO)/maximum length of the sagitta (LO)%, expresses the relative tendency in the shape otolith (from circular to elongate). The value of R =length of the rostrum (LR)/LO%, expresses the percentage in the total length of the otolith that corresponds to the rostrum. The sagittae of group 1 were circular or polygonal with rounded borders. The rostrum can be absent or poorly developed. The sagittae shape of group 2 was elongated, with ornamented borders and a rostrum. The sagittae of group 3 possessed a prominent rostrum, a deep V-shaped cisure and ornamented borders. Statistical analysis showed no significant differences in the E index of groups 1 and 2, while R values of the three groups were significantly different. These results were compared with 80 other species, belonging to 12 families, from the publisher literature. E and R values could be used to characterize the sagittae of the marine fish and could be considered a useful tool for fish ecology studies.

Subfields: Ecology, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/2d7e1b9135b1c85aa968ada6350858f6fdad4b27

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In Ecology

1. Antoni Lombarte
2. A. Cruz
3. B. Morales-Nin
4. J. Gómez‐Zurita
5. Miquel Palmer
6. J. Matallanas
7. Yves Letourneur

In Global and Planetary Change

1. Antoni Lombarte
2. B. Morales-Nin
3. A. Cruz
4. R. Lecomte-Finiger
5. Yves Letourneur
6. B. Mérigot
7. K. Hüssy

Citations in the corpus

• Otolith size trends in marine fish communities from different depth strata (2007, background): “The morphological differences affect both the size and shape of the otoliths (Paxton, 2000; Wright et al., 2002; Volpedo & Echevarrı́a, 2003).”
• Characterization of local populations of the common sole Solea solea (Pisces, Soleidae) in the NW Mediterranean through otolith morphometrics and shape analysis (2007, background): “The substrate characteristics could also have an effect ( Volpedo and Echeverria 2003 ).”
• Ecomorphological trends and phylogenetic inertia of otolith sagittae in Nototheniidae (2010, background): “Sanz-Echevarria (1950) and Volpedo and Echevarria (2003) observed a relationship between fish ecotypes and the shape of the otolith, pointing out that the otoliths in pelagic species are characteristically long with a well developed rostrum, while otoliths from benthic ecotypes are rounder in shap”
• Otolith size and its relationship with colour patterns and sound production (2004, background): “Volpedo & Echevarrı́a (2003) indicated there was a relationship between overall otolith shape and preferred habitat.”