Otolith shape and elemental signatures provide insights into the connectivity of euryhaline Chelon labrosus inhabiting two close estuaries with different burdens of xenoestrogens in the Southern Bay of Biscay

Nzioka, Anthony; Cancio, Ibon; Cerio, Oihane Díaz de; Pinto, Edgar; Correia, Alberto Teodorico

doi:10.1016/j.marenvres.2023.106075

Marine Environmental Research

2023

DOI: 10.1016/j.marenvres.2023.106075

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Otolith shape and elemental signatures provide insights into the connectivity of euryhaline Chelon labrosus inhabiting two close estuaries with different burdens of xenoestrogens in the Southern Bay of Biscay

Anthony Nzioka

Ibon Cancio

Oihane Díaz de Cerio

et al.

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Cited by 3 publications

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Stock identification and age prediction of Red Mullet Mullus barbatus in the western Black Sea (Türkiye) as inferred from otolith shape descriptors

Yildiz,

Cömert,

Kahraman

et al. 2024

Mar Coast Fish

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ObjectiveIn this study, we applied shape analysis to differentiate two Red Mullet Mullus barbatus stocks in the western Black Sea and assessed the generalized linear model (GLM) for age prediction based on otolith dimensions and weight.MethodsSagittal otoliths from 259 fish were collected by commercial bottom trawl vessels in İğneada and Şile, Türkiye, between October 2017 and April 2018. Otolith shape was described using wavelet transformation (contour shape) along with four morphometric characteristics (otolith length, area, width, and perimeter) and six shape indices (circularity, rectangularity, form factor, roundness, ellipticity, and aspect ratio) to reveal differences between the two regions. Shape indices were explored using multivariate statistical methods, including multivariate analysis of variance (MANOVA) and canonical discriminant analysis (CDA). Canonical analysis of principal coordinates (CAP) provided an overview of the differentiation in the otolith outline shape between the two stocks by using the wavelet coefficients. The GLMs predicted age using otolith size parameters, shape indices, and otolith weight.ResultThe MANOVA showed no significant differences between sexes but notable differences between right and left otoliths. The CDA achieved a discrimination rate of 65.7% for age 1 and 64.8% for age 3, indicating distinct local populations. The otolith contours varied between Red Mullet sampled in the two regions, with CAP achieving an overall accuracy of 67.1% for both regions, 68.12% accuracy for İğneada, and 66.20% accuracy for Şile. The GLMs identified otolith length, weight, width, and perimeter and fish sex as key factors, with otolith length being the most significant predictor for age estimation.ConclusionThe close alignment of observed and estimated ages highlights the potential for using otolith length in age estimation.

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Stock identification and age prediction of Red Mullet Mullus barbatus in the western Black Sea (Türkiye) as inferred from otolith shape descriptors

Yildiz,

Cömert,

Kahraman

et al. 2024

Mar Coast Fish

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Population structure and habitat connectivity of Pogonias courbina (Perciformes, Sciaenidae) in two Brazilian lagoon systems on south-east coast of Rio de Janeiro, Brazil, inferred from otolith shape and elemental signatures

de Almeida,

da Costa,

Ribeiro

et al. 2024

Journal of Sea Research

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The developmental changes in the morphology of the otolith of the mullet Chelon auratus (Risso, 1810) (Mugiliformes, Mugilidae) collected from Köyceğiz Lagoon, Aegean Sea, Türkiye

Reıs,

Ateş,

Jawad

2023

New Zealand Journal of Zoology

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Otolith shape and elemental signatures provide insights into the connectivity of euryhaline Chelon labrosus inhabiting two close estuaries with different burdens of xenoestrogens in the Southern Bay of Biscay

Cited by 3 publications

References 69 publications

Stock identification and age prediction of Red Mullet Mullus barbatus in the western Black Sea (Türkiye) as inferred from otolith shape descriptors

Stock identification and age prediction of Red Mullet Mullus barbatus in the western Black Sea (Türkiye) as inferred from otolith shape descriptors

Population structure and habitat connectivity of Pogonias courbina (Perciformes, Sciaenidae) in two Brazilian lagoon systems on south-east coast of Rio de Janeiro, Brazil, inferred from otolith shape and elemental signatures

The developmental changes in the morphology of the otolith of the mullet Chelon auratus (Risso, 1810) (Mugiliformes, Mugilidae) collected from Köyceğiz Lagoon, Aegean Sea, Türkiye

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