Use of otolith morphology and morphometry for species discrimination of megrims <i>Lepidorhombus</i> spp. in the Central Eastern Adriatic Sea

Ugrin, Nika; Škeljo, Frane; Ferri, Josipa; Šifner, Svjetlana Krstulović

doi:10.1017/s0025315421000564

Cited by 4 publications

(12 citation statements)

References 28 publications

(32 reference statements)

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“…compatible with the studies in the literature. In this study, while the overall classification score of CDA for L. whiffiagonis and L. boscii species is 76.5% in the Aegean Sea,Ugrin et al (2021) reported that the overall classification score of linear discriminant analysis for these species is 79.5% in central eastern Adriatic Sea. For instance,Ugrin et al (2021) reported that the overall classification score of the linear discriminant analysis for L. whiffiagonis and L. boscii species was 79.5% in the central eastern Adriatic Sea.…”

mentioning

confidence: 56%

“…In this study, while the overall classification score of CDA for L. whiffiagonis and L. boscii species is 76.5% in the Aegean Sea,Ugrin et al (2021) reported that the overall classification score of linear discriminant analysis for these species is 79.5% in central eastern Adriatic Sea. For instance,Ugrin et al (2021) reported that the overall classification score of the linear discriminant analysis for L. whiffiagonis and L. boscii species was 79.5% in the central eastern Adriatic Sea. In the current study, the overall classification score of the CDA for these species was determined as 76.5% in the Aegean Sea.…”

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confidence: 56%

“…There is no previous study in which the otolith length, otolith perimeter, otolith area, form factor, otolith width, roundness, circularity, aspect ratio, rectangularity and ellipticity characters were all determined in blind and eyed side otoliths of Lepidorhombus species. However, otolith shape indices such as circularity and rectangularity and morphometric measurements such as otolith length and otolith width of the L. whiffiagonis and L. boscii were previously described by other researchers (Tuset et al, 2008; Ugrin et al, 2021). Ugrin et al (2021) calculated the average OL and OW values as 7.01 ± 1.01 and 4.84 ± 0.82 for eyed side otoliths, 6.85 ± 0.85 and 4.73 ± 0.72 for blind side otoliths in L. whiffiagonis .…”

Section: Discussionmentioning

confidence: 99%

“…Similar results were also obtained in Lepidorhombus spp. from the Adriatic Sea (Ugrin et al, 2021) and northeastern Atlantic (Tuset et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…However, otolith shape indices such as circularity and rectangularity and morphometric measurements such as otolith length and otolith width of the L. whiffiagonis and L. boscii were previously described by other researchers (Tuset et al, 2008;Ugrin et al, 2021) for L. boscii as 13.5-14.4 and 0.1-0.2, respectively. These otolith shape indices were also reported as 14.2-14.6 and 0.2 for L. whiffiagonis.…”

Section: Lepidorhombus Whiffiagonis Lepidorhombus Bosciimentioning

confidence: 99%

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Morphologic, morphometric and contour shape variations of sagittal otoliths of Lepidorhombus spp. in the Aegean Sea

Yedier

Yalçınkaya

Bostancı

et al. 2022

Anat Histol Embryol

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Otoliths are calcareous anatomical structures in the inner ear of fishes, and they can be used in the discrimination of fish species and stocks due to their species‐specific shape. Sagittal otoliths in the Lepidorhombus whiffiagonis and Lepidorhombus boscii, two flatfish species of the same genus distributed in the Aegean Sea, were compared using morphology, morphometry and contour shape analyses. Blind and eyed side otoliths of Lepidorhombus species were evaluated separately due to their morphological features and statistical differences in morphometric measurements (p < 0.05). Four analysis groups were formed: blind side otolith of L. whiffiagonis, eyed side otolith of L. whiffiagonis, blind side otolith of L. boscii and eyed side otolith of L. boscii. Morphometric differences in otolith shape were performed by canonical discriminant analysis, and the first discriminant axis explained 97.4% (Wilks λ = 0.270) of the variance between the groups, and the second axis explained 2.3% (Wilks λ = 0.620). Classification success between Lepidorhombus species based on CDA is 100%, and the overall CDA classification score between groups is 76.5%. The wavelet functions obtained in the contour analysis showed high variability in the anterior, posterior‐dorsal, antero‐dorsal and ventral regions of the otoliths among these four analysis groups. Consequently, it is thought that this study will contribute to the taxonomic classification of fish with the morphological and morphometric differences in the blind and eyed side otoliths and the analyses made with the high discrimination success obtained in Lepidorhombus species.

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confidence: 56%

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confidence: 56%

Section: Discussionmentioning

confidence: 99%

“…Similar results were also obtained in Lepidorhombus spp. from the Adriatic Sea (Ugrin et al, 2021) and northeastern Atlantic (Tuset et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Section: Lepidorhombus Whiffiagonis Lepidorhombus Bosciimentioning

confidence: 99%

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Morphologic, morphometric and contour shape variations of sagittal otoliths of Lepidorhombus spp. in the Aegean Sea

Yedier

Yalçınkaya

Bostancı

et al. 2022

Anat Histol Embryol

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Comparing otolith shape descriptors for population structure inferences in a small pelagic fish, the European sardine Sardina pilchardus (Walbaum, 1792)

Neves

Veríssimo²,

Santos

et al. 2023

Journal of Fish Biology

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Otolith shape analysis has been one of the most used approaches to study population structure in the past decades. Currently, two sets of shape descriptors are used to perform otolith shape analysis, namely, Elliptic Fourier descriptor (EFd), which focuses on the overall otolith shape differences, and Discrete Wavelet descriptor (DWd), which is sensible to local differences along the otolith contour. Here, the authors conducted a comparative analysis of the performance of both the descriptors in reconstructing the population structure and connectivity patterns in a small pelagic fish species with a wide geographical distribution and fast growth rate, the European sardine Sardina pilchardus (Walbaum, 1792), for the first time. A combination of each otolith shape descriptor and shape indices was explored using multivariate statistical methods. The two otolith shape descriptors showed similar, although limited, overall classification success associated with the population dynamic characteristics of the species. Both descriptors point to migration among adjacent areas, such as northern Atlantic locations, eastern Mediterranean and even across well-defined physical obstacles, such as the Strait of Gibraltar, among Atlantic and western Mediterranean locations. Both descriptors supported the division of the populations of Mediterranean waters into three main groups but slightly differed in the group limits of the Atlantic waters. A comparison of the present results with those from previous otolith shape analysis studies using EFd on a decadal time scale revealed differences in the population structure and connectivity patterns compared to the earlier period.These differences not only may be attributed to changes in environmental variables leading to changes in population dynamics but can also be the result of the sardine biomass sharp decrease that occurred in the past decade.

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Age, Growth, and Validation of Otolith Morphometrics as Predictors of Age in the Blackspot Seabream, Pagellus bogaraveo, (Brunnich, 1768) from the Eastern Adriatic Sea

Paladin

Ugrin

Matić‐Skoko

et al. 2023

Fishes

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The age and growth of the blackspot seabream, Pagellus bogaraveo, were determined by examining sagittal otoliths from fish sampled in the eastern Adriatic Sea. A total of 674 specimens (181 males, 90 hermaphrodites, 108 females, and 295 immatures) ranging from 8.80 to 47.27 cm (21.93 ± 9.00 cm) in total length were analyzed. The maximum observed age for the whole sample was 13 years. The sample was dominated by 1-year-old specimens as a consequence of an abundance of juvenile specimens collected by beach seines. Growth was described by the von Bertalanffy growth curve (L∞ = 52.3 cm, K = 0.15 year−1, t0 = 0.49 year, R2 = 0.97), and the growth performance index (Φ’) was 2.61. The length, width, thickness, and mass of the otoliths were compared with the total length and age of P. bogaraveo from the eastern Adriatic. The analysis showed that the measures were adequate predictors of age. These results can be of value for more effective management measures aimed at the conservation of this species.

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Use of otolith morphology and morphometry for species discrimination of megrims Lepidorhombus spp. in the Central Eastern Adriatic Sea

Cited by 4 publications

References 28 publications

Morphologic, morphometric and contour shape variations of sagittal otoliths of Lepidorhombus spp. in the Aegean Sea

Morphologic, morphometric and contour shape variations of sagittal otoliths of Lepidorhombus spp. in the Aegean Sea

Comparing otolith shape descriptors for population structure inferences in a small pelagic fish, the European sardine Sardina pilchardus (Walbaum, 1792)

Age, Growth, and Validation of Otolith Morphometrics as Predictors of Age in the Blackspot Seabream, Pagellus bogaraveo, (Brunnich, 1768) from the Eastern Adriatic Sea

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