Aberrant otoliths in four marine fishes from the Aegean Sea, Black Sea, and Sea of Marmara (Turkey)

Yedier, Serdar; Bostancı, Derya

doi:10.1016/j.rsma.2019.101011

Cited by 12 publications

(14 citation statements)

References 35 publications

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“…The presence of vaterite in 50% anomalous otoliths analyzed and in none of the otoliths with normal morphology indicates the possibility of a relationship between its deposition and the deformations verified, as pointed out in other studies (Carvalho et al., 2019; David & Grimes, 1994; Falini, 2005; Kern et al., 2017; Manizadeh et al., 2018; Yedier & Bostanci, 2020). Vaterite deposition is usually associated with physiological stress (Budnik et al., 2020; Kern et al., 2017), possibly caused by environmental changes (Avigliano et al., 2012; Carvalho et al., 2019; David & Grimes, 1994).…”

Section: Discussionsupporting

confidence: 64%

“…Those otoliths have intraspecific shape (Campana, 2004; Lombarte et al., 2010; Manizadeh et al., 2018; Popper & Lu, 2000; Popper et al., 2005; Tuset et al., 2008), with the vast majority of teleost groups having them composed of aragonite (Campana, 2004; Oliveira, 1996; Popper et al., 2005; Vignon, 2019). Several authors have reported otoliths with anomalous shape and crystallizations (Carvalho et al., 2019; David & Grimes, 1994; Falini, 2005; Kern et al., 2017; Manizadeh et al., 2018; Yedier & Bostanci, 2020). These studies have associated such changes to the crystallization of calcium carbonate polymorphs, such as vaterite and calcite.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have found that individuals with anomalous otoliths were collected from sites where there is a large amount of pollutant discharge, contributing to the hypothesis of physiological stress caused by environmental changes (Carvalho et al., 2019; Yedier & Bostanci, 2020). The presence of vaterite can indicate environmental stress, since it is more unstable and crystallizes at lower pH and/or temperatures than aragonite (Nebel & Epple, 2008).…”

Section: Introductionmentioning

confidence: 99%

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First record of anomalous otoliths in Atherinella brasiliensis

2021

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Sagittal otoliths are structures integrating the sensory system of teleost fish, assisting in balance and hearing and are normally formed by calcium carbonate as aragonite. Sagittal otoliths have intraspecific shape, the aim of this study was to check the frequency of anomalous otoliths and to characterize the crystallization of sagittal otoliths in Atherinella brasiliensis. For that, 45 specimens of A. brasiliensis were collected in the Paranaguá Estuarine Complex (25°32'59” S–48°23'20” W), from which the otoliths were removed from the palate region. Raman spectrometry was performed on 30 otoliths; aragonite deposition was observed in otoliths without morphological changes (n = 26) and aragonite (n = 2) and vaterite (n = 2) deposition in those with morphological changes. Therefore, the frequency of otoliths with morphological changes was 8.8%. The fact that this is the first report of otoliths with morphological changes and deposition of vaterite for A. brasiliensis, demonstrates the need for studies that correlate environmental changes with physiological stress in estuarine fish.

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Section: Discussionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First record of anomalous otoliths in Atherinella brasiliensis

2021

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“…In the last 20 years, there has been a valuable contribution regarding otolith shape analysis and some types of morphometric descriptors have been reported with various purposes, such as studying morphometric relationships between right versus left otoliths Freire et al, 2017;Mille et al, 2015;Yedier & Bostanci, 2019); morphological identification and discrimination between close fish species or different fish populations (de Carvalho, Spach, et al, 2019;El habouz et al, 2016aEl habouz et al, , 2016bLadroit et al, 2017;Reig-Bolano et al, 2010;Skeljo & Ferri, 2012;Zorica et al, 2010); estimation of fish age based on morphometric analysis (See et al, 2016) or microstructures such as rings growth (Begg et al, 2001;Edwards et al, 2014;Nava et al, 2017;Yedier & Bostanci, 2020); an automatic taxonomic identification to identify biological species or structures (Parisi-Baradad et al, 2010;Salimi et al, 2016); studying how differences related to environmental and genetic aspects affect otoliths shape and growth (Jaramillo et al, 2014;Tuset et al, 2003;Vignon, 2012;Vignon & Morat, 2010); analyzing morphological features associated with the fish ecomorphologic type (Volpedo & Echeverrıá, 2003); as well as other events related to the life cycle of fish such as historical and biological characteristics, behaviour and activity (Montanini et al, 2017); further providing important information in decision-making about the exploitation vulnerability of species related to longevity and natural mortality ratio (Begg et al, 2005;Williams et al, 2015), and sustainable fishing activities (Iestyn-Map p, 2015). Some studies have been reported about left and right otoliths asymmetry, for example Lychakov et al (2006) show an asymmetry mesure obtained in rapport of otolith mass by mathematical models with asymmetry values among individual fish, and they reported that these asymmetry values are stable during a fish's lifetime.…”

Section: Discussionmentioning

confidence: 99%

“…In the case of the shape asymmetries of left and rightsagittal otolith, Mille et al (2015) evaluated the length and roundess values for analyse the effects of ontogenetic changes, sexual dimorphism, and significant directional asymmetry; and they showed that asymmetry never exceeded 18%, so this result can be suggests an evolutionary canalization of otolith shape symmetry avoiding on fish hearing and balance problems. Asymmetry studies based on otolith shape are also relevant in the case of otoliths with aberrant shapes studies, because these morphological alterations can be due environmental factors, nutritional problems, pollution, stress, or changes in water parameters Yedier & Bostanci, 2019, 2020. Some morphometric descriptors have been reported to analyse otoliths shape, among them the classic measures such as otolith length, width, thickness, and weight Freire et al, 2017;Volpedo & Echeverrıá, 2003).…”

Section: Introductionmentioning

confidence: 99%

Invariant morphological descriptors from otolith shape in environment automatic classification

et al. 2021

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One of the ways to recognize patterns is through the intrinsic information of the object's shape by descriptors that allow us to quantitatively describe the contained shape of the object. In ichthyology, the otolith shape recognition is notable for each fish species, which allows the study of the sagitta otolith in species classification, the comparison of otolith shape across the fish ontogeny or growth, and the symmetry analysis of these structures in the case of the same fish. In the last twenty years, there has been a valuable contribution regarding otolith shape analysis and various types of morphometric descriptors have been proposed. The first objective of this work is to propose the implementation of invariant morphometric descriptors, as Discrete Compactness, Discrete Tortuosity, Non-Circularity, and Mirror-Symmetry, and compare their performance with other reported morphometric descriptors. The second objective is the implementation of the Random Forest (RF) algorithm to classify the fish species according their environment (marine, brackish, and freshwater).The right and left sagittae otoliths of 139 marine, brackish, and freshwater species (adults and juveniles) of the Yucatan peninsula and Gulf of Mexico were analysed with invariant and other reported descriptors. The global results show that the invariant descriptors can provide complementary information to other reported descriptors based on area or perimeter, given a low correlation between these features. The environment classification of species using a RF classifier showed that 83% of species correspond positively with their environment classification. This classification analysis can be a useful tool for studies of trophic dynamics, or in archaeological and paleontological studies on fossil fauna this classification tool would allow inferring from remains the environment of the studied communities and their evolution over long periods of time.

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Morphological and morphometric features of the abnormal and normal saccular otoliths in flatfishes

Yedier

Türker

2022

The Anatomical Record

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The fish's inner ear consists of three interconnected semicircular canals and otolith organs located in these canals, which are responsible for balance and hearing. Abnormalities in these organs can affect the vital activities of the fish. The main purpose of this study was to determine the morphological and morphometric characteristics of abnormal and normal sagittal otoliths in the four flatfish species (Lepidorhombus boscii, Platichthys flesus, Solea solea, and Pegusa lascaris) sampled from three seas (Aegean Sea, Mediterranean Sea, and Black Sea). Abnormalities in otoliths are investigated using light microscopy, scanning electron microscopy, and Raman spectroscopy. The otolith morphometric measurements and morphology are recorded for abnormal and normal otoliths for each species. It was determined that the four flatfish species examined in the present study showed differences in the morphological features of normal and abnormal otoliths in the blind and eyed sides. In addition, statistical differences were observed when the weight, length, width, perimeter, and area values of normal and abnormal otoliths of all species were compared (p < .05). The four types of saccular otoliths were defined, one normal (type 0) and three abnormal (type 1, type 2, and type 4) for four flatfish species. The current study presents for the first-time abnormal otolith morphology information on blind and eyed side sagittal otoliths in these flatfish species. Abnormalities in the anatomical structures of bony parts such as otoliths in fish may be caused by pollution, nutritional problems, stress, and environmental factors as well as a combination of these.

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Aberrant otoliths in four marine fishes from the Aegean Sea, Black Sea, and Sea of Marmara (Turkey)

Cited by 12 publications

References 35 publications

First record of anomalous otoliths in Atherinella brasiliensis

First record of anomalous otoliths in Atherinella brasiliensis

Invariant morphological descriptors from otolith shape in environment automatic classification

Morphological and morphometric features of the abnormal and normal saccular otoliths in flatfishes

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