Research Article

Preliminary study on otolith chemistry and otolith morphology of two demersal fish species, European hake (Merluccius merluccius Linnaeus, 1758) and striped red mullet (Mullus surmuletus Linnaeus, 1758) in the Sea of Marmara

Volume: 38 Number: 4 December 15, 2021
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Preliminary study on otolith chemistry and otolith morphology of two demersal fish species, European hake (Merluccius merluccius Linnaeus, 1758) and striped red mullet (Mullus surmuletus Linnaeus, 1758) in the Sea of Marmara

Abstract



Otoliths are calcium carbonate (CaCO3) accumulations. Under the influence of different ecosystems morphological and chemical composition change. In this study, economically important two demersal fish species; European hake Merluccius merluccius (Linnaeus, 1758) and Stripet red mullet (Mullus surmuletus Linnaeus, 1758) was examined. Otoliths (Sagitta) belonging to these two species have been studied both chemically and morphologicall. Morphometric measurements of otoliths (length, mm; width, mm; area, mm2; perimeter, mm) in the sagittal of each species was made by the Leica M125 tri-ocular microscope. In the chemical analysis of otoliths, strontium (Sr), magnesium (Mg) and calcium (Ca) trace element amounts, the ratios of Sr and Mg trace elements to Ca element (Sr/Ca and Mg/Ca) were determined. For the micro-chemical analysis of otoliths ICP-MS was used. The highest magnesium (24.92±9.57 mmol/mol) and strontium (26.17±1.81 mmol/mol) element values were found in the otolith of red mullet. The difference between strontium (Sr) and magnesium (Mg) amounts for two fish species was found to be significant (P<0.05). In addition to it was found that the difference between them in the amount of calcium is significant (P<0.001). The shape indexes of otoliths are significantly different between the two fish species. Especially in terms of roundness (RD) and aspect ratio (AR) (P<0.001). The results of this study provide information about the habitats of two economic importance demersal fish species. Since such studies can give information about the habitat areas of fish species, they are important for tracking stocks, migration routes and sustainable fisheries.


Keywords

References

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Details

Primary Language

English

Subjects

Fisheries Management

Journal Section

Research Article

Publication Date

December 15, 2021

Submission Date

May 25, 2021

Acceptance Date

November 9, 2021

Published in Issue

Year 1970 Volume: 38 Number: 4

APA
Bal, H., & Esen, S. (2021). Preliminary study on otolith chemistry and otolith morphology of two demersal fish species, European hake (Merluccius merluccius Linnaeus, 1758) and striped red mullet (Mullus surmuletus Linnaeus, 1758) in the Sea of Marmara. Ege Journal of Fisheries and Aquatic Sciences, 38(4), 515-521. https://doi.org/10.12714/egejfas.38.4.13

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