Preprint volume - SIBM

Pre-print Volume –Posters
NECTON AND FISHERY COMMITEE
TRIGLUC; LEPTCAV-TRIGLUC; TRIPLAS-TRIGLUC; LEPTCAV-TRIGLYR;
LEPTDIE-TRIGLYR.; for “circularity” LEPTDIE-LEPTCAV; LEPTDIE-TRIPLAS;
LEPTCAV-TRIPLAS. Otoliths morphologically more different, defined by three shape
indices, were those belonging to L. cavillone and C. lucerna. The results were in
agreement with the analytical key about the family (FAO, 1987) that placed these two
species at the extremes. 2) MULTIVARIATE ANALYSIS (MANOVA): Intraspecific
comparison were analyzed by multivariate analysis. The otolith outline shape indices
changed with size (between juveniles and adult) and sex for some species. In particular,
intraspecific comparison showed significant differences between juveniles and adults
for A. cuculus, C. lucerna, L. dieuzeidei and between females and males for L.
dieuzeidei. Therefore, about the intraspecific relationship, L. dieuzeidei was the species
more diversified. 3) SCANNING ELECTRON MICROSCOPY (SEM): otolith shape
of triglids were approximately oval. Preliminaries analyses showed interspecific
variations in the morphology and ultrastructure of the sulcus acusticus, about shape,
size, direction of crystalline arrangement and crystalline surface. Intraspecific variation
appeared relate to growth and environmental factors. These results were in agreement
to Tuset et al. (2003) and Jitpukdee (2009) for other families.
Conclusions - These results suggested: similarity between species belonged to the
same genus; differences between species phylogenetically distant (e.g. L. cavillone and
C. lucerna); intraspecific differences between juveniles and adults (e.g. A. cuculus, C.
lucerna, Lepidotrigla dieuzeidei); similarity between species belonged to different
genera (Lepidotrigla spp. and C. lastoviza). These methods (geometric morphometrics
and ultrastructure analysis) constitute an important instrument for species identification
using sagittal otoliths collected in feeding remains of bony fish predators, in
fossiliferous layers, in archaeological sites.
References
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TUSET V.M., LOMBARTE A., GONZALEZ J.A., PERTUSA J.F., LORENTES M.J. (2003) -
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VALLISNERI M., MONTANINI S., STAGIONI M. (2010) - Length-weight relationships for the
family Triglidae in the Adriatic Sea, northeastern Mediterranean. J. Appl. Ichthyol., 26 (1-3).
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010
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