Geometric analysis of mandible using semilandmark in Hamdani and Awassi sheep

Demiraslan, Yasin; Demircioğlu, İ̇smail; Güzel, Barış Can

doi:10.33988/auvfd.1099535

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…According to Principal component analysis, the samples clustered significantly in terms of breed. It was stated that there was no clustering in terms of gender [10]. In this study, a significant clustering was observed in terms of three breeds in the results of principal component analysis.…”

Section: Discussionmentioning

confidence: 39%

“…In the study conducted in İvesi sheep and ram, it was seen that PC1 explained % 24.92 of the total variation and PC2 explained %18.525 of the total variation [11]. In the study conducted in Hamdani and İvesi sheep mandible, it was seen that PC1 explained %36,521 of the total variation and PC2 explained %16,614 of the total variation [10]. In this study performed on the mandibles of three different species, it was found that PC1 explained %29.568 of the total variation and PC2 explained %22.169.…”

Section: Discussionmentioning

confidence: 96%

“…Demirarslan (2023) [10] analyzed the mandible samples by using semilandmark geometric morphometric methods in order to determine whether the breed and sex factors had an effect on the mandible shape of Hamdani and İvesi sheep. According to Principal component analysis, the samples clustered significantly in terms of breed.…”

Section: Discussionmentioning

confidence: 99%

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Mandibular Shape Variation in Different Sheep Breeds

Boz,

Manuta,

Jashari

et al. 2023

Preprint

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In countries that have animal husbandry tradition and are developing this, it is impossible not to underline the different local breeds. There is anatomically significant morphological and morphometric variability among these breeds, which differ from one region to another. In this study, geometric morphometry was performed in order to examine the shape variation of the mandible and to reveal the shape variations due to breed diversity in the Bardhoka (Kosova), Țurcana (Romania) and İvesi (Turkey) breed sheep. A total of 40 (10 Bardhoka, 10 Țurcana, 20 İvesi) mandibles were used and were examined shape differences for these three breeds. 2D images of the mandibles were analyzed from the lateral view 9 landmarks were used. Average shape and shape variations of the mandible were obtained for all samples. Mandible showed significant shape variation among sheep breeds and the results were statistically significant. According to the results, among the three sheep breeds in the study, the İvesi breed has the widest mandible shape distribution. While İvesi and Țurcana show a wider distribution in shape variation; The Bardhoka breed expressed a more limited variation. It can be noticed that all three breeds are morphologically and morphometrically different from each other. Bardhoka and İvesi breeds were the most different from each other in this study (p < 0.0001). It is thought that the obtained findings will contribute to future geometric morphometry studies with ruminant mandible samples.

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Section: Discussionmentioning

confidence: 39%

Section: Discussionmentioning

confidence: 96%

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Mandibular Shape Variation in Different Sheep Breeds

Boz,

Manuta,

Jashari

et al. 2023

Preprint

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“…However, the bone shape and size are different. Therefore, many studies have been carried out on the geometric morphometry of various bones (Gündemir et al, 2020;Gürbüz et al, 2020;Demircioğlu et al, 2021;Duro et al, 2021;Gündemir et al, 2021;Demiraslan et al, 2022;Gürbüz et al, 2022;Szara et al, 2022). In this study, it was aimed to reveal the anatomical features and differences of the incus between the donkey and horse belonging to the same family subgroup.…”

Section: Discussionmentioning

confidence: 99%

Geometric Morphometric Investigation of Incus in Horse (Equus ferus caballus) and Donkey (Equus Asinus)

Gürbüz

Demiraslan

2023

Black Sea Journal of Agriculture

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In this study, it was aimed to determine the shape of the incus in horse and donkey by geometric morphometric method and to evaluate the shape differences between horse’s and donkey’s incus. The left incus bone of 5 adult horses and 5 donkeys were used in the study. Incus were photographed at same lateral direction. Thirteen homologous landmarks were marked from the photographs using TpsUtil (Version 1.79) and TpsDig2 (Version 2.31) software. As a result of the study, the first principal component explained 38,642% of the total shape variation. In the PC1 plot, samples were clearly clustered by group. Acording to canonical varians analysis, in the wire frame warp graphic, the corpus incudis edges (right, left, and bottom) were flatter in donkeys. Angle at the LM13 level was more pronounced on the crus breve. The apex of the crus longum (Landmark 4, 5, and 6) was wider in donkey. In the study, the morphological features of horse’s and donkey’s incus were determined by geometric morphometric method. This study is important in that it is the first geometric morphometric study on the incus that is one of the ossicula auditus in horse and donkey. We think that the study will contribute to the anatomy of the ossicula auditus in the equide family.

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“…The geometric morphometric approach is extensively employed for monitoring alterations in the configuration and dimensions of the skeletal structure, encompassing the skull as an integral system component throughout evolutionary progression. Authors utilize the geometric morphometric method globally to examine variations in shape among diverse populations and scientific disciplines (Demiraslan et al, 2023; Demircioglu et al, 2021, 2022; Gündemir et al, 2020; Jashari et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Orbital shape in sheep and goats with sex and breed factors

Karaavci,

Demiraslan,

Demircioğlu

et al. 2023

Anat Histol Embryol

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The purpose of this study was to identify the dimorphic structures of the orbita based on breed and sex factors through shape analysis across species. Additionally, the study aimed to ascertain the variability between the two species. A total of 86 (51 sheep—Akkaraman [Ak] and Morkaraman [Mk], 35 goats—Hair [Hr] and Honamlı [Hm]) skulls were used in the study. It was decided to designate 36 landmarks to represent the orbit's edge. In the principal component analysis, 68 PCs were calculated. It was determined that PC1, PC2 and PC3 explained the total variance in morphology by 26.909%, 16.147% and 13.616%, respectively. According to the cross‐validation results, the goats were grouped with 95% (Hm: 100%, Hr: 90%), while the sheep were grouped with 56% (Ak: 50%, Mk: 63%). Therefore, dimorphism among goat breeds on orbita shape was more pronounced compared to sheep. In the discriminant function analysis of the sex groups, Procrustes and Mahalanobis distance values in goats were 0.04425425 (p < 0.0001) and 5.3733 (p = 0.9550), in sheep 0.03513424 (p < 0.0001) and 7.1003 (p = 0.9414), respectively, was detected. According to the cross‐validation results, in terms of sex, goats were correctly grouped at a rate of 74% (F: 73%; M: 75%) and sheep breeds were correctly grouped at a rate of 72% (F: 77%; M: 66%). Factors such as habitat selection, breeding behaviours and ecological environment may show anatomical differences within breeds as well as between breeds. Therefore, various measurement techniques are used to reveal these differences. As a result, it is thought that the study will contribute to many disciplines, especially taxonomy and zooarchaeology, by analysing the shape of the orbita of sheep and goat breeds, the domestication of which dates back to ancient times, and revealing the similarities and differences between species and according to sex.

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Geometric analysis of mandible using semilandmark in Hamdani and Awassi sheep

Cited by 7 publications

References 20 publications

Mandibular Shape Variation in Different Sheep Breeds

Mandibular Shape Variation in Different Sheep Breeds

Geometric Morphometric Investigation of Incus in Horse (Equus ferus caballus) and Donkey (Equus Asinus)

Orbital shape in sheep and goats with sex and breed factors

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