Mineralogy and geochemistry of otoliths in freshwater fish from Northern Italy

Lenaz, Davide; Miletić, Marija; Pizzul, Elisabetta; Vanzo, Silvia; Adami, Gianpiero

doi:10.1127/0935-1221/2006/0018-0143

Cited by 20 publications

(25 citation statements)

References 24 publications

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“…This explanation is consistent with our data (Fig. 5, Table 3) and with previous studies (Brecevic et al 1996, Lenaz et al 2006). In addition, Ca 2+ also preferentially enters the aragonite lattice rather than vaterite because the ionic radii ratio of Ca 2+ to O 2 -(0.714 at CN = 6) is also close to the stable upper limit of vaterite.…”

Section: Why Elemental Composition Differs Between Vaterite and Aragosupporting

confidence: 94%

Misidentification of the migratory history of anguillid eels by Sr/Ca ratios of vaterite otoliths

Tzeng¹,

Chang²,

Wang³

et al. 2007

Mar. Ecol. Prog. Ser.

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Most fish otoliths are composed of aragonite, but occasionally they form a mosaic with its polymorph, vaterite. We found an unusual mosaic structure of extremely low strontium to calcium (Sr/Ca) ratio in the aragonite otoliths of European eels Anguilla anguilla. The mosaic crystal structure in the eel otolith appeared opaque under reflected light after EDTA etching and was confirmed to be a vaterite crystal by Raman spectroscopy. Analysis by laser ablation inductively coupled plasma mass spectrometry indicated that the elements sodium (Na), strontium (Sr) and barium (Ba) were lower in abundance and magnesium (Mg) and manganese (Mn) were higher in the vaterite than in the aragonite. Otoliths with vaterite inclusions were found in 48.1% of the 108 eels examined. If the mosaic vaterite in otoliths is not identified and avoided, the migratory environmental history of fish could be misidentified when otolith elemental signatures are used as biological tracers.

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Section: Why Elemental Composition Differs Between Vaterite and Aragosupporting

confidence: 94%

Misidentification of the migratory history of anguillid eels by Sr/Ca ratios of vaterite otoliths

Tzeng¹,

Chang²,

Wang³

et al. 2007

Mar. Ecol. Prog. Ser.

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“…This morph is unstable (Brunson & Chaback, 1979) and rare in nature. A vateritic asteriscus is frequent in several teleosts (Lowenstam & Weiner, 1989;Campana, 1999;Falini et al 2005;Lenaz et al 2006), whereas a vateritic sagitta is characteristic of ancient species such as Ciclostomata, Polypterus and sturgeons (Carlstrom, 1963). It is, however, occasionally present as an abnormality (Gauldie, 1986;Ma et al 2007) or in juvenile (Tomàs et al 2004;Sweeting et al 2004) samples.…”

Section: Discussionmentioning

confidence: 99%

Morphological and biochemical analyses of otoliths of the ice‐fish Chionodraco hamatus confirm a common origin with red‐blooded species

Motta¹,

Avallone²,

Balassone

et al. 2008

Journal of Anatomy

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The morphology and composition of the three otoliths of the Antarctic ice-fish Chionodraco hamatus were studied by scanning electron microscopy and X-ray diffraction. The composition of the sagitta, lapillus and asteriscus protein matrices was also analysed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis, western blots and confocal laser scanning microscopy to reveal the presence of and to localize the calcium-binding proteins calmodulin, calbindin and S-100. Morphological results indicated that the otoliths in this ice-fish were similar to those of Trematomus bernacchii , a red-blooded Antarctic species [B. Avallone et al. (2003) J. Submicrosc. Cytol. Pathol. 35 , 69-76], but rather different from those of other teleosts. These two Antarctic species possessed a completely vateritic asteriscus, whereas their sagitta and lapillus were made mostly of aragonite. Parallel analysis of protein patterns in C. hamatus and T. bernacchii revealed that the sagitta significantly differed from the lapillus and asteriscus in both species. The sagitta did not contain the S-100 protein and showed calmodulin and calbindin located in discontinuous or incremental zones, respectively. These results demonstrate that the otoliths of C. hamatus and T. bernacchii share more resemblances than differences and support the idea of a common origin of these species.

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“…The sagittal and lapillar otoliths of most fishes are composed of aragonite, but the asteriscus otoliths of most species are normally composed of vaterite (Campana 1999;Lenaz et al 2006). However, the translucent and abnormally shaped outer regions of the sagittal otoliths of various species of fishes have found to be composed of vaterite as well (Gauldie 1996;Tomás and Geffen 2003;Sweeting et al 2004).…”

Section: Introductionmentioning

confidence: 96%

Morphology and microchemistry of abnormal otoliths in the ayu, Plecoglossus altivelis

Kuroki

Miller

et al. 2007

Environ Biol Fish

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The sagittal otolith morphology and microchemistry of reared juvenile ayu, Plecoglossus altivelis, were examined to describe the occurrence and microchemical characteristics of the abnormal otoliths in this species. Juvenile ayu (N=31) were collected in June 2004 at three different locations, Wakayama, Kumamoto, and Biwa Lake in Japan, where they were being reared in freshwater aquaculture ponds after having been collected in the wild as larvae. Otolith abnormality was found in the sagittae of 26% (N=8) of the individuals examined, of which five fish had abnormal otoliths only on one side, while the otolith on the other side was normal. Abnormal otoliths were more transparent and crystalline in appearance with irregular shapes compared to normal ones that were more opaque and less irregular. Abnormal otoliths were divided into two types, semi-abnormal (Type 1) with a normal part in the center, and fully-abnormal (Type 2) that were completely crystalline in appearance. The line transects and whole otolith concentration maps showed that the contents of Sr, Na and K were lower in the abnormal otolith regions compared to the normal ones, while those of Ca and S were almost constant in both. The appearance and microchemical properties of the abnormal ayu otoliths were similar to the abnormal otoliths in other species in which vaterite replaces the aragonite. Abnormal formation of otoliths occurred in ayu from Biwa Lake (30%) and Kumamoto (45%), while the Wakayama samples had no abnormality. The microchemical analyses of the normal and abnormal otoliths indicated that some abnormal otoliths had formed before the fish were captured and transferred to the hatchery, so the possible causes of otolith abnormality in ayu are discussed.

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Mineralogy and geochemistry of otoliths in freshwater fish from Northern Italy

Cited by 20 publications

References 24 publications

Misidentification of the migratory history of anguillid eels by Sr/Ca ratios of vaterite otoliths

Misidentification of the migratory history of anguillid eels by Sr/Ca ratios of vaterite otoliths

Morphological and biochemical analyses of otoliths of the ice‐fish Chionodraco hamatus confirm a common origin with red‐blooded species

Morphology and microchemistry of abnormal otoliths in the ayu, Plecoglossus altivelis

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