Otolith patterns of rockfishes from the northeastern pacific

Tuset, Víctor M.; Imondi, Ralph; Aguado, Guillermo; Otero-Ferrer, José Luís; Santschi, Linda; Lombarte, Antoni; Love, Milton S.

doi:10.1002/jmor.20353

Cited by 58 publications

(47 citation statements)

References 69 publications

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“…Previous studies have found a clear correspondence between otolith morphospace and the trophic niche of fish Tuset et al 2015). In the present study, sparids and flatfish will be the best species adapted within these fish assemblages, forming similar packing species in the otolith and body morphospaces.…”

Section: Interpreting the Otolith Morphospacesupporting

confidence: 65%

Testing otolith morphology for measuring marine fish biodiversity

Tuset¹,

Farré²,

Otero-Ferrer³

et al. 2016

Mar. Freshwater Res.

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Abstract.To check the suitability of otoliths for measuring biodiversity, the contour and shape of the sulcus acusticus of sagittal otoliths were described using geometric morphological analysis. Thirteen and fourteen points were used to define these structures respectively. Three current coastal fish assemblages of the north-western Mediterranean were selected for the present study. The results demonstrate that the relative warps generated in the geometric analysis explained both characteristics related to contour and the otolith sulcus. A comparative study with body fish shape using morphospaces and clusters revealed that otolith shape is a better variable for explaining the ecological structure of a fish assemblage. Moreover, three morphological indices (morphological richness (MR), morphological disparity and the morphogeometric index) were estimated from relative warps of otoliths and were compared with ecological, taxonomic, functional and morphological (from body shape) indices. MR increased with functional diversity and average taxonomic distinctness, reflecting the ecological and taxonomic character of otolith morphology. These findings suggest that otoliths could be a useful tool for studying the diversity of present and past fish assemblages.

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Section: Interpreting the Otolith Morphospacesupporting

confidence: 65%

Testing otolith morphology for measuring marine fish biodiversity

Tuset¹,

Farré²,

Otero-Ferrer³

et al. 2016

Mar. Freshwater Res.

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“…Otolith morphology was indicated species and genus diagnostic in marine and freshwater species (Bostanci et al;Tuset et al, 2015). Small differences in left and right sagittal otolith shape and shape indices were determine in D. puntazzo inhabiting the Aegean Sea (Tables II and III).…”

Section: Discussionmentioning

confidence: 97%

Sagittal Otolith Morphology of Sharpsnout Seabream Diplodus puntazzo (Walbaum, 1792) in the Aegean Sea

et al. 2016

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SUMMARY:The morphology, biometry and shape indices of the left and right sagittal otoliths were studied for sharpsnout seabream, Diplodus puntazzo species from Aegean Sea. The shape, sulcus acusticus shape, proximal and distal surfaces, anterior and posterior regions of left and right sagittal otoliths for a total of 52 D. puntazzo were analyzed. The morphometric measurements such as weight, length, width, area and perimeter were recorded for each pair of sagittal otoliths of the sharpsnout seabream. The shape indices such as form factor, roundness, aspect ratio, circularity, rectangularity, and ellipticity were calculated for left and right sagittal otoliths of D. puntazzo. The otolith width and ellipticity were significantly different (P <0.05) for left and right sagittal otolith measurements and shape indices, respectively in D. puntazzo inhabiting the Aegean Sea. Morphological characteristics of fish otoliths were highly variable in species and populations; there was limited information on the sagittal otolith morphology and shape indices. The present study provided sufficient information of the sharpsnout seabream left and right otolith morphologies, biometry, and shape indices in the Aegean Sea, they may provide a useful tool for marine and freshwater species discrimination and identification in further investigations.

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“…A principal component analysis (PCA) was first carried out to reduce the number of dimensions without the loss of information (Sadighzadeh et al, 2014). To detect the significant eigenvectors, we plotted the percentage of total explained variation of eigenvectors versus the proportion of variance expected under the ''broken stick model'' (Gauldie & Crampton, 2002;Tuset et al, 2015). Only the significant PC components were used subsequently for MANOVA analysis.…”

Section: Discussionmentioning

confidence: 99%

“…Only the significant PC components were used subsequently for MANOVA analysis. In addition, the identification of the different otolith patterns was established from distance values (based on Euclidean distance) using a cluster analysis (Tuset et al, 2015), with the algorithm from the unweighted pair-group method of arithmetic averages (UPGMA).…”

Section: Discussionmentioning

confidence: 99%

Phenotypic plasticity in wild marine fishes associated with fish-cage aquaculture

et al. 2015

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Two opportunistic fish species associated with fish farms, bogue (Boops boops) and salema (Sarpa salpa), were studied to infer whether changes in their feeding habits may cause a phenotypic response in body and otolith shape. Specimens were collected close to aquaculture cage sites, called 'wildfarmed fish', and from control sites far away from these areas, called 'wild fish'. The fish body shapes were examined with geometric morphometric analysis using 21 landmarks. The otolith contours were analysed using wavelet function, whereas otolith weights were used as indicators of fish growth rates. Statistically significant differences were observed in body shape between wild-farmed fish and wild fish of both species. The wild-farmed fish had a smaller head and eye, and in bogue also a slighter snout curvature and head depth. Otolith shape and weight did not differ between groups in bogue. By contrast, there were significant differences in otolith shape and weight between groups in salema. A complementary study in salema indicated that the wild-farmed fishes grew more in weight and accumulated higher concentrations of 'terrestrial fatty acids' (linoleic and alphalinolenic acids), which are used in fish feeds. Our findings clearly demonstrated an influence of coastal sea cages on metabolism of some wild fishes.

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Otolith patterns of rockfishes from the northeastern pacific

Cited by 58 publications

References 69 publications

Testing otolith morphology for measuring marine fish biodiversity

Testing otolith morphology for measuring marine fish biodiversity

Sagittal Otolith Morphology of Sharpsnout Seabream Diplodus puntazzo (Walbaum, 1792) in the Aegean Sea

Phenotypic plasticity in wild marine fishes associated with fish-cage aquaculture

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