A scale atlas for common Mediterranean teleost fishes

Braeger, Zsuzsanna; Moritz, Timo

doi:10.3897/vz.66.e31566

Cited by 37 publications

(14 citation statements)

References 21 publications

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“…Teleost fishes, which make up ~96% of all extant fish species, feature two types of scales, “cycloid” and “spined” scales (Bräger & Moritz, 2016; Viertler et al, 2021; Wainwright & Lauder, 2016). Both scale types can vary in shape and thickness, and the clupeiform fishes present the cycloid type.…”

Section: Discussionmentioning

confidence: 99%

“…The linear measurements used for the morphometric analyses and for the estimation of the focal index (Fi) as (a‐c/ a‐a′) 100. ‘a‐c’ is the distance from the outermost part of the anterior field to the focus, ‘a‐a′’ is the distance from the outermost part of the anterior field to the outermost part of the posterior field, and ‘b‐b′’ is dorsal–ventral height (Bräger & Moritz, 2016; Roberts, 1993; Sabbah et al, 2021), Scale = 1 mm…”

Section: Methodsmentioning

confidence: 99%

“…At the Sardinia scale, the radii are transverse and irregular and often do not radiate from the focus. In this study, we named the grooves according to their direction (Bräger & Moritz, 2016; Figure 2c).…”

Section: Radiimentioning

confidence: 99%

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Scales and otoliths as identity cards of the Indian oil sardine Sardinella longiceps (Teleostei: Clupeiformes) populations: Ultrastructure and ornamentation characteristics using light and scanning electron microscopy

et al. 2022

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Scale and otolith morphology and morphometry of Indian oil sardine Sardinella longiceps (Clupeidae) were investigated and described using light and scanning electron microscopy from eight different body regions for scales and the right and left otoliths. Scales of the Indian oil sardine show general characteristics of the other studied clupeids sand that are easily distinguishable from other fish groups, by having striae in the posterior field. The studied cycloid scales of S. longiceps were classified into three types based on the overall shape including circular (e.g. true circular and cordate), pentagonal and quadrilateral in the different body regions. The circular shape was the most common shape (87.5%), while the quadrilateral and pentagonal forms constituted 6.25% each. The results also showed that the relative scale size (J-index) plays a desirable contribution in separating the examined populations. The results showed that the mean (or relative) scale size for all the eight regions in the Oman Sea population is larger than the Arabian Sea population. Also, another scale variable, the scale shape index (Si index), demonstrated variation (a mean of 0.86 to 1.1) in different regions of both populations from the Oman and Arabian Seas. Interestingly, here, we found that scale characters of S. longiceps not only differ from its other congeneric species, but also differ in the populations from both sides of the Oman Sea (Iran and Oman) and the Arabian Sea. It shows a positive signal for the presence of different taxonomic and management unit in the Oman and Arabian Seas. The idea should be approved by using integrated molecular and morphological traits. The otolith morphology of S. longiceps from the Oman and Arabian Seas was more conservative than the scales, which can be due to its function actin primarily as a balance organ and also enhancing hearing. The overall shape of S. longiceps otolith was lanceolate, with an elongated morphology and a well-developed rostrum, an ostial sulcus acusticus that opens to the anterior/ dorsal margin. These morphological characters are also found in the Iranian population of S. longiceps. However, otolith displayed variation in biometric parameters among two populations and left and right otoliths and the RRL parameter were important characters to discriminate

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Scales and otoliths as identity cards of the Indian oil sardine Sardinella longiceps (Teleostei: Clupeiformes) populations: Ultrastructure and ornamentation characteristics using light and scanning electron microscopy

et al. 2022

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“…The photographed scales were used to study and describe the general morphology of the scales. The scale terminology follows Roberts (1993) and Bräger and Moritz (2016).…”

Section: Methodsmentioning

confidence: 99%

Scale morphological variation across the flank in four Tonguefishes species collected from the Gulf of Oman (Pleuronectiforms; Cynoglossidae)

et al. 2022

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The scale morphology of pleuronectiforms in the Gulf of Oman remains insufficiently known. This study used light microscopy and morphological analysis to examine scale variation across the flank of four Tonguefishes species; Cynoglossus arel, C. bilineatus, C. lingua, and C. puncticeps. Scales were extracted from six flank regions, three on the eyed and blind sides, respectively. The most differentiated species was C. arel, which showed significant differences in four size variables in five regions. In Cynoglossus arel and C. lingua, the scales of the eyed side were ctenoid, and those scales from the blind side were cycloid; C. puncticeps have ctenoid scales on both flank sides and C. bilineatus has cycloid scales on both sides. All species' scales on the blind side have fewer ctenial spines (except in C. bilineatus). This study indicated that scale morphology demonstrated considerable variation among the flank regions of the examined species. As a result, the scales from the head and the trunk regions of the eyed side and the scales from the head region of the blind side have a good power of species separation in this family.

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“…Radius umumnya dibatasi hanya pada bidang anterior. Circulus merupakan garis lingkaran pada permukaan sisik, circulus selalu bertambah selama ikan itu hidup, sehingga dapat dijadikan sebagai tanda pertumbuhan ikan (Brager & Moritz, 2016).…”

Section: Diagnosisunclassified

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Putra¹,

Bhagawati²,

Setyaningrum³

2023

bioe

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The increase in the high demand for snakehead fish from the community causes high exploitation of this fish. The high activity of catching snakehead fish along with the production volume that increases every year will certainly threaten the sustainability of snakehead fish. The need for morphometric and meristic research is to provide information that can be used for conservation efforts in the Klawing River. The purpose of this study was to determine whether standard morphometry, truss morphometric, and meristic can be used to identify the sex of snakehead fish from the Klawing River and to determine the specific characters that distinguish the morphology of male and female snakehead fish. The method used is a survey with accidental sampling from the Klawing River assisted by fishermen. Sampling was carried out 5 times from February to March 2021. The variables observed were morphological performance, standard morphometry, truss morphometric, and meristic. Parameters in this study were body shape, mouth shape, mouth position, caudal fin shape, type of scales, tooth type, ratio of body parts distances, number of fin rays, and number of scales. The perfprmance morphological, standard morphometric, truss morphometric, and meristic then analyzed descriptive. The results showed that morphological performance could not be used as a sex determine of snakehead fish. The standard morphometric characters that can be used as sex differences for snakehead fish from 21 characters are head width with an asymp.sig value 0.20. The truss morphometric character that can be used as sex distinguishing snakehead fish is from 23 characters, A1 with an asymp.sig value 0.048, A6 with an asymp.sig value 0.038, C5 with an asymp.sig value 0.021. Meristic characters cannot be used to distinguish the sex of snakehead fish, because they have relatively the same number of fin rays and scales.

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A scale atlas for common Mediterranean teleost fishes

Cited by 37 publications

References 21 publications

Scales and otoliths as identity cards of the Indian oil sardine Sardinella longiceps (Teleostei: Clupeiformes) populations: Ultrastructure and ornamentation characteristics using light and scanning electron microscopy

Scales and otoliths as identity cards of the Indian oil sardine Sardinella longiceps (Teleostei: Clupeiformes) populations: Ultrastructure and ornamentation characteristics using light and scanning electron microscopy

Scale morphological variation across the flank in four Tonguefishes species collected from the Gulf of Oman (Pleuronectiforms; Cynoglossidae)

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