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Journal articles on the topic "Otolit"
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Umar, Yulianti, Fransine B. Manginsela, and Ruddy D. Moningkey. "Otolith And Growth Pattern Layang Fish, Decapterus Muroadsi Temminck & Schlegel, 1844 In Manado Bay." JURNAL ILMIAH PLATAX 7, no. 1 (2018): 27. http://dx.doi.org/10.35800/jip.7.1.2019.21441.
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The aim of this research is to know the distribution of the size of Decapterus muroadsi, to describe otolit that is otolith length (Po), width otolith (Lo), perimeter / otolith circumference (Ko), otolith area (Ao), and determine the relationship of total length and body weight of fish kite Decapterus muroadsi in Manado Bay. The sampling was conducted in August - December 2017 of the gliders obtained during the study of 135 individuals in which males were 87 individuals and 48 female individuals. Distribution of the total length of the globe and the body height of the globe fish 190 mm - 225 mm, weighs 63 grams - 154 grams, the female fish has a total length of 205 mm - 250 mm, and weighst 88 grams - 159 grams. To know the morphometric perimeter otolith left and right perimeter otolith fish taken to be taken as otolith samples of male fish (15 individuals) and females (15 individuals). The results of the comparison analysis were found for the left and right otolith of male trooper with otolith length (Po) 0.796, perimeterr / otolith circumference (Ko) 0.621, and otolith area (Ao) 0.268 and females with 0.027 otolith (Po) 0.057, perimeter / otolith (Ko) 0.231, and otolith area (Ao) 0.858, males and females did not differ significantly between left otolith and right otolite where t-hit <from t-table as for otolith (O2) 2,371 and otolith otolith otolith (Lo) 2,952 differs markedly where t-hit> from t-table. Kites, Decapterus muroadsi used as a sample in the study were 135 individuals divided into 3 parts, namely males and females and combined (males and females). Based on the result of growth pattern analysis on the value of the fish b of the Decapterus muroadsi male has t-hit> t-table (4E - 06> 1,998) and mixed (and female) have t-hit> t-table (4E-06 - 1,997) Therefore H1 is accepted as (allometric) and females have t-hit <t-table (3E-O6-1,679) has a value b where hypothesis H1 is accepted as isometric. Keywords: Decapterus muroadsi, Describing, Otolith, male, females ABSTRAKPenelitian ini bertujuan untuk mengetahui sebaran ukuran ikan layang Decapterus muroadsi, mendeskripsikan otolit yakni panjang otolit (Po), lebar otolit (Lo), perimeter/keliling otolit (Ko), area otolit (Ao), dan menentukan hubungan panjang total dan berat tubuh ikan layang Decapterus muroadsi di Teluk Manado. Pengambilan sampel ini dilakukan pada bulan Agustus – Desember 2017 ikan layang yang di peroleh selama penelitian sebanyak 135 individu di mana jantan 87 individu dan betina 48 individu. Sebaran ukuran panjang total ikan layang dan berat tubuh ikan layang jantan 190 mm – 225 mm, berat 63 gram – 154 gram, ikan layang betina memiliki panjang total 205 mm – 250 mm, dan berat 88 gram – 159 gram, Untuk mengetahui perimeter morfometrik otolit kiri dan kanan perimeter otolit ikan layang yang diambil untuk dijadikan sampel otolit ikan layang jantan berjumlah (15 individu) dan betina (15 individu). Hasil analisis perbandingan ternyata untuk otolit kiri dan kanan ikan layang jantan dengan Panjang otolit (Po) 0,796, perimeterr / keliling otolit (Ko) 0,621, dan area otolit (Ao) 0,268 dan betina dengan Panjang otolit (Po) 0,057, perimeter/keliling otolit (Ko) 0,231, dan area otolit (Ao) 0,858, jantan dan betina tidak berbeda nyata antara otolit kiri dan otolit kanan di mana t-hit < dari t-tabel adapun untuk otolit jantan lebar otolit (Lo) 2,371 dan otolit betina lebar otolit (Lo) 2,952 berbeda nyata di mana t-hit > dari t-tabel. Ikan layang, Decapterus muroadsi yang digunakan sebagai sampel dalam penelitian berjumlah 135 individu yang di bagi dalam 3 bagian yaitu jantan dan betina serta gabungan (jantan dan betina). Berdasarkan hasil analisis pola pertumbuhan terhadap nilai b ikan layang Decapterus muroadsi jantan memiliki t-hit> t-tabel (4E – 06 >1,998) serta campuran (jantan dan betina) memiliki t-hit> t-tabel (4E-06 – 1,997) Maka dari itu H1 di terima sebagai (allometrik) dan betina memiliki t-hit< t-tabel (3E-O6– 1,679) memiliki nilai b dimana hipotesis H1 diterima sebagai isometrik.Kata kunci : Decapterus muroadsi, mendeskripsikan, otolit, jantan, betina
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Taliawo, Rofino, Fransine B. Manginsela, and Nego E. Bataragoa. "Otolith Morphometrics of Selar Crumenophthalmus From Kema Strait." JURNAL ILMIAH PLATAX 6, no. 1 (2018): 98. http://dx.doi.org/10.35800/jip.6.1.2018.18905.
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Otolith or ear stone of fish, known as a result of biomineralization which takes place in the body of the fish. In some studies, otolith used to estimate age and stock structure of the fish. The otolith was categorized into three types called sagitta, lagena and utrikulus and the most widely studied. This study was designed to describe the characteristics of the otolith of S. crumenophthalmus by implementing six index form descriptors.Tthe study also dimed at determinition the relationship of fish length and otolith length as well as otolith width . Linear regression approch was used to analyse the relationship of fish length and whole characteristics otolith . Those parameters were analysed using Excel and application R program ( the package the FSA ). The results show that otolith S.crumenophthalmus sagitta has 6 descriptor indicees thatt are as follow: 1) the irregular surface (from factor < 1), 2) comparison against a full round (roundness ≠ 1), no 3) (full circle-shaped circularity: 21), 4) do not form a perfect square (R ≠ 1) and 5 axis) changes of 28-29 and 6) form a somewhat elongated (aspect ratio > 1). The value index otolith form is showed ellipse.Based on the results of the analysis, the otolith left and right (length, width, perimeter, and area) otolith males S. crumenophthalmus has no different. Same alsois found on the case of males otolith, left and on right (long) females otolith S. crumenophthalmus does not differ except the width of the otolith, the area and perimeter size of a different otolith real. The relationship between the length size and width dimensions of otolith with the total length of the fish has a linear relationship. The second parameter of the linear relationship is marked by the determination coefficient values on otolith length varies between 0,56-0,62 and its width ranged from 0.49 to 0.69. For female fish, otolith lenght detemination coefficient varies between 0.27 and 0.25 to its width ranges from 0.15 to 0.19.Key words: S.crumenophthalmus, otolith Morfometrik, Gulf of Kema AbstrakOtolit atau batu telinga ikan dikenal sebagai hasil dari biomineralisasi yang berlangsung dalam tubuh ikan. Pada beberapa studi, otolit digunakan untuk mengestimasi umur ikan serta struktur stok. Dari tiga (3) organ otolit (sagitta, utrikulus dan lagena), yang paling banyak diteliti adalah otolit sagitta.Penelitian yang dilakukan bertujuan untuk mendeskripsikan karakter otolit ikan Selar crumenophthalmus (yang mengunakan 6 deskriptor indeks bentuk) dan menentukan hubungan panjang tubuh ikan dengan panjang otolit serta lebarnya.Hubungan ukuran otolit terhadap panjang total ikan dianalis mengunakan persamaan regresi linier sederhana. Alat yang digunakan untuk menganalisis bentuk serta hubungan otolit menggunakan aplikasi Excel serta program R package FSA.Dari hasil analisis, otolit sagitta ikan Selar crumenophthalmus memiliki 6 deskriptor indeks yang hasilnya adalah : 1) permukaan yang tidak teratur (from factor < 1), 2) perbandingan terhadap bulat penuh (roundness ≠1), 3) tidak berbentuk lingkaran penuh (circularity: 21), 4) tidak membentuk persegi sempurna (R≠1) dan 5) perubahan sumbu sebesar 28-29 serta 6) bentuk agak memanjang (aspect ratio >1). Dari nilai indeks bentuk tersebut, otolit Selar crumenophthalmus menunjukan bentuk yang elips.Berdasarkan hasil analisis, otolit kiri dan kanan (panjang, lebar, , perimeter area /luas) otolit jantan Selar crumenophthalmus tidak berbeda nyata. Sama halnya dengan otolit jantan, kiri dan kanan (panjang) otolit betina Selar crumenophthalmus tidak berbeda nyata, namun lebar otolit, area serta perimeter otolit berbeda nyata.Hubungan antara dimensi ukuran panjang dan lebar otolit dengan panjang total ikan memiliki hubungan linier. Hubungan linear kedua parameter tersebut ditandai dengan nilai koefisien determinasi pada panjang otolit ikan jantan bervariasi antara 0, 56- 0, 62 dan lebarnya berkisar antara 0,49 sampai 0,69. Untuk ikan betina, koefisien deteminasi panjang otolit bervariasi antara 0,25 sampai 0,27 dan lebarnya berkisar antara 0,15 sampai 0,19.Kata kunci: Selar crumenophthalmus, Morfometrik otolit, Teluk Kema
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Bahri, Saiful, Lawrence J. L. Lumingas, and Fransine B. Manginsela. "Otolith biometry analysis of betong fish, Selar crumenophthalmus (Bloch, 1793) (Teleostei: Carangidae) in Manado Bay, North Sulawesi." JURNAL ILMIAH PLATAX 6, no. 2 (2018): 124. http://dx.doi.org/10.35800/jip.6.2.2018.21075.
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This study aims to examine whether there are differences in the size and shape of otolith both between sexes and between the sampling times of bigeye scad Selar crumenophthalmus in Manado Bay, North Sulawesi. Most of the otolith sizes and the otolith shape indices do not show any significant differences between left and right, some of which show statistically significant differences such as the otolith length and the indices of the roundness, ellipticity and aspect ratio of female fish at August 2017 and otolith length, otolith width and otolith perimeter of male fish at November 2017. The otolith sizes and shape indices do not differ between sexes but differ between sampling times ie August 2017 and November 2017. Otolith sizes such as length, width, area and perimeter and shape indices such as circularity and rectangularity can be used as indicators of stock determination. Other shape indices of otolith such as form factor, roundness, ellipticity and aspect ratio are not well used as stock determination. Most of the samples showed a negative allometric growth pattern, except in the sample of female fish sampled in November 2017 which showed an isometric growth pattern for all otolith size variables. There is no statistically significant difference in the regression line of the otolith sizes - total length between sexes, but there is a statistically very significant difference in the regression line between sampling times (months) where the otolith size is greater in November 2017 or in other words at the same length of fish, otolith sizes bigger in November 2017 than in August 2017. The otolith sizes and their relationship with the total length of the fish can be used for determining (separating) the stock of bigeye scad Selar crumenophthalmus. There is a possibility that the sample for August 2017 is a different stock with samples from November 2017.Key words: Selar crumenophthalmus, otolith, morphometry, stock identification, Manado Bay ABSTRACTPenelitian ini bertujuan untuk menguji apakah terdapat perbedaan ukuran dan bentuk otolit baik antar seks maupun antar waktu pengambilan sampel ikan selar betong Selar crumenophthalmus di Teluk Manado Sulawesi Utara. Sebagian besar ukuran serta indeks bentuk otolit tidak menunjukkan perbedaan yang nyata antara kiri dan kanan, beberapa di antaranya menunjukkan perbedaan yang nyata secara statistik misalnya ukuran panjang otolit serta indeks bentuk otolit ‘roundness’, ‘ellipticity’ dan ‘aspect ratio’ pada ikan betina Agustus 2017 dan ukuran panjang otolit, luas otolit dan keliling otolit pada ikan jantan November 2017. Ukuran dan indeks bentuk otolit tidak berbeda antar jenis kelamin tetapi berbeda antar waktu sampling yakni Agustus 2017 dan November 2017. Ukuran otolit seperti panjang, lebar, luas dan keliling otolit serta indeks bentuk seperti ‘circularity’ dan ‘rectangularity’ dapat digunakan sebagai indikator penentu stok. Indeks bentuk otolit lainnya seperti ‘form factor’, ‘roundness’, ‘ellipticity’ dan ‘aspect rasio’ kurang baik digunakan sebagai variable penentu stok. Sebagian besar sampel menunjukkan pola pertumbuhan alometri negatif, kecuali pada sampel ikan betina yang disampling pada November 2017 yang memperlihatkan pola pertumbuhan isometrik untuk semua variabel ukuran otolit. Tidak terdapat perbedaan garis regresi ukuran otolit - panjang total antar seks, tetapi terdapat perbedaan yang sangat nyata garis regresi tersebut antar waktu sampling (bulan) di mana ukuran otolit lebih besar pada bulan November 2017 atau dengan kata lain pada panjang ikan yang sama, ukuran otolit lebih besar pada bulan November 2017 dibandingkan dengan pada bulan Agustus 2017. Ukuran otolit serta hubungan regresi dengan panjang total ikannya dapat digunakan untuk penentuan (pemisahan) stok ikan selar betong Selar crumenophthalmus. Ada kemungkinan sampel bulan Agustus 2017 merupakan stok yang berbeda dengan sampel bulan November 2017.Kata kunci: Selar crumenophthalmus, otolit, morfometri, identifikasi stok, Teluk Manado
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Mogea, Djusty, Lawrence J. L. Lumingas, and Gybert Mamuaya. "Biometric Analysis of Otolith (Sagitta) for the Stock Separation of Skipjack Tuna Katsuwonus pelamis (Linnaeus, 1758) Landed at Tumumpa Coastal Fisheries Port Manado, North Sulawesi." JURNAL ILMIAH PLATAX 7, no. 2 (2019): 401. http://dx.doi.org/10.35800/jip.7.2.2019.24124.
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Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) is one of the most important species for Indonesian marine capture fisheries and is the third major species of capture fisheries in the world. This study aims to analyze the biometry of otolith (sagitta) of skipjack tuna caught with ‘soma pajeko’ (mini purse-seine) around FADs in the Sulawesi Sea. A total of 96 individuals of skipjack tuna measuring total length (TL) ranged between 232 and 625 mm and the average of TL was 419.64 mm (SD = 112.78 mm) were successfully taken otolith without defects. The length of otolith (OL) of the skipjack tuna ranged between 2.693 and 5.269 mm with an average of OL was 3.435 mm (SD = 0.602 mm). For both the size and shape indices of the otolith, there were no significant difference between the left and right otoliths for otolith length (OL), otolith perimeter (OP), Form-Factor (FF) and Roundness (Rnd), but asymmetric influences were very significance for otolith width (OW), otolith area (OA), Circularity (Cir), Rectangularity (Rec), Ellipticity (Ell) and Aspect Ratio (AR). There were no significant difference in the mean size and shape indices of the otolith between females and males. The relationship between TL - OL follows the power function: OL = 1.027993 * TL0.198863 (R2 = 13.18%). The low value of R2 seems to be due to the mixing of more than one stock of skipjack tuna in the sample. Separation of observation data in the relationship between TL - OL into two different stocks can increase the value of b or R2. It is possible for skipjack tuna in the Sulawesi Sea to consist of two different stocks. The separation of the two stocks can mainly be determined by the size of the otolith, the size of the otolith of stock 1 is relatively large compared to stock 2. The relationship of ln (TL) - ln (OL) stock 1 and stock 2 were ln (OL) = -2,282 + 0,610 * ln (TL) (n = 53; r = 0.91) and ln (OL) = -2,363 + 0.566 * ln (TL) (n = 43; r = 0.64). It is possible that stock 1 is the stock of the Indian Ocean and stock 2 is the stock of the Western Pacific Ocean. To test this hypothesis, genetic studies are needed.Keywords: otolith biometry, stock separation, Katsuwonus pelamis, Sulawesi SeaABSTRAKIkan cakalang, Katsuwonus pelamis (Linnaeus, 1758) merupakan salah satu spesies yang sangat penting untuk perikanan tangkap laut Indonesia dan merupakan spesies utama urutan ke-3 perikanan tangkap dunia. Penelitian ini bertujuan untuk menganalisis biometri otolit (sagitta) ikan cakalang yang tertangkap dengan ‘soma pajeko’ (mini purse-seine) di sekitar rumpon di Laut Sulawesi. Sejumlah 96 individu ikan cakalang berukuran panjang total (TL) 232 - 625 mm dan rata-rata TL 419,64 mm (SD = 112,78 mm) berhasil diambil otolitnya tanpa cacat. Otolit (kiri) ikan cakalang tersebut berukuran panjang (OL) 2,693 - 5,269 mm dengan rata-rata OL 3,435 mm (SD = 0,602 mm). Baik untuk ukuran maupun indeks bentuk otolit, tidak terdapat perbedaan yang nyata antara otolit kiri dan kanan untuk panjang otolit (OL), keliling otolit (OP), Form-Factor (FF) dan Roundness (Rnd), tetapi pengaruh asimetris untuk lebar otolit (OW), luas otolit (OA), Circularity (Cir), Rectangularity (Rec), Ellipticity (Ell) dan Aspect Ratio (AR) sangat nyata. Tidak terdapat perbedaan yang nyata rata-rata ukuran maupun indeks bentuk otolit antara betina dan jantan. Hubungan TL - OL mengikuti fungsi perpangkatan: OL = 1,027993*TL0,198863 (R2 = 13,18%). Rendahnya nilai R2 ini nampaknya disebabkan karena bercampurnya lebih dari satu stok ikan cakalang dalam sampel. Pemisahan data amatan dalam hubungan TL – OL menjadi dua stok yang berbeda dapat menaikkan nilai b maupun R2. Ikan cakalang yang terdapat di Laut Sulawesi ada kemungkinan terdiri dari dua stok yang berbeda. Pemisahan kedua stok tersebut terutama dapat ditentukan lewat ukuran otolitnya, stok 1 berukuran otolit relatif besar dibandingkan dengan stok 2. Hubungan ln(TL) – ln(OL) stok 1 dan stok 2 berturut-turut adalah ln(OL) = -2,282 + 0,610*ln(TL) (n = 53; r = 0,91) dan ln(OL) = -2,363 + 0,566*ln(TL) (n = 43; r = 0,64). Ada kemungkinan stok 1 merupakan stok Samudra Hindia dan stok 2 merupakan stok Samudra Pasifik Barat. Untuk menguji hipotesis ini diperlukan kajian secara genetik.Kata kunci: biometri otolit, pemisahan stok, Katsuwonus pelamis, Laut Sulawesi
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Wujdi, Arief, Maya Agustina, and Irwan Jatmiko. "Indeks bentuk otolit ikan cakalang, Katsuwonus pelamis (Linnaeus, 1758) dari Samudra Hindia." Jurnal Iktiologi Indonesia 18, no. 2 (2019): 151. http://dx.doi.org/10.32491/jii.v18i2.312.
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Skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) plays an important role in terms of the marine ecosystems as preyed-upon by shark, billfish, and larger tunas. In order to determine food chain system, there was a gap information as digested skipjack tuna difficult to be identified. This study aimed to determine shape indices to describe the otolith shape of skipjack. The morphometry data were collected from 253 pairs of skipjack tuna’s otolith during February, April, August, and September 2016 from four fishing ports namely Binuangeun, Sadeng, Prigi, and Labuhan Lombok. The data normality and homogenity also determined using Kolmogorov-Smirnov and Levene test respectively. In addition, right and left otolith morphometry were investigated using paired T-test. The shape indices were calculated using six descriptors including form factor (FF), roundness (RO), circularity or compactness (C), rectangularity (Rt), ellipticity (E), and aspect ratio (AR). Multivariate test using MANOVA and Tuckey test also implemented to investi-gate variation among locations. The results showed that the data were distributed normally and homogenly. There were also not significantly difference on otolith morphometry between left and right side (P>0,05). Shape indices also pro-vided in this paper. Skipjack tuna’s otolith has performed as non-rounded, closed to oval, elongated, and irregular surface.AbstrakIkan cakalang, Katsuwonus pelamis (Linnaeus, 1758) berperan penting dalam ekosistem perairan laut, yaitu mangsa bagi jenis hiu, kelompok billfish, dan tuna berukuran besar lainnya. Dalam hal mengungkap hubungan pemangsa dan mangsa dalam suatu rantai makanan, seringkali terjadi kekosongan informasi karena sulitnya mengidentifikasi ikan yang telah tercerna. Penelitian ini bertujuan untuk menentukan bentuk morfologi otolit ikan cakalang berdasarkan nilai indeks bentuk. Data morfometri dikumpulkan dari 253 pasang otolit ikan cakalang pada bulan Februari, April, Agustus, dan September tahun 2016 di empat tempat pendaratan ikan, yaitu: Binuangeun, Sadeng, Prigi, dan Labuhan Lombok. Data morfometri otolit diuji normalitas dan homogenitasnya masing-masing menggunakan uji Kolmogorof-Smirnov dan Levene. Uji T berpasangan juga diterapkan untuk memastikan signifikansi perbedaan antara morfometrik otolit kanan dan kiri. Penghitungan indeks bentuk menggunakan enam deksriptor, yang meliputi form factor (FF), roundness (RO), circularity atau compactness (C), rectangularity (Rt), ellipticity (E), dan aspect ratio (AR). Analisis multivariat menggu-nakan MANOVA dan uji Tuckey juga diterapkan untuk menentukan perbedaan morfometri otolit dari masing-masing lokasi. Hasil menunjukkan bahwa data tersebar normal dan homogen serta tidak terdapat perbedaan yang signi-fikan pada morfometri otolit kanan dan kiri (P>0,05). Penelitian ini juga menyajikan nilai indeks bentuk yang menjelas-kan bentuk morfologi otolit ikan cakalang, yaitu memiliki karakteristik cenderung oval, memanjang, dan memiliki per-mukaan yang tidak beraturan.
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Mujimin, Mujimin. "TEKNIK PENGAMBILAN OTOLIT." Buletin Teknik Litkayasa Akuakultur 4, no. 2 (2016): 33. http://dx.doi.org/10.15578/blta.4.2.2005.33-35.
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Düşükcan, Mustafa. "Özlüce Baraj Gölü’ndeki Capoeta trutta (Heckel, 1843) populasyonunda Balık Boyu-Otolit Biyometrisi İlişkisi." Turkish Journal of Agriculture - Food Science and Technology 6, no. 6 (2018): 764. http://dx.doi.org/10.24925/turjaf.v6i6.764-769.1911.
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In this study, otolith biometry-total length relationship was investigated in longspine scraper, Capoeta trutta (Heckel, 1843) obtained from Özlüce Dam Lake, which was built on Peri Stream at Elazığ-Bingöl province border. For this purpose, total 115 fish samples (60 males and 55 females) were examined between September 2017 and December 2017. The sex determination was made after the total length of them was measured. The left and right otoliths of each fish were removed and they were made ready for measurement. Otolith weights (OA) were determined to a precision of 0.0001g. Otolith length (OU) and otolith width (OG) were measured using a computer-assisted image analysis program. The differences between right and left otoliths and between male and female otoliths in term of OA, OU and OG values were not statistically found significant. In the all population, TB, OU, OG and OA values were found as 118-381 mm, 1.536-3.734 mm, 1.049-2.585 mm and 1.10-13.90 mg respectively. The relationships of TB with OU, OG and OA were found to be positive and strong.
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Atılgan, Elvan, Murat Erbay, and Nimet Selda Başçınar. "İstavrit (Trachurus mediterraneus Steindachner, 1868) Balığının Bütün Otolit ve Kırılıp-Yakılan Otolit Yaşlarının Karşılaştırılması." Yunus Araştırma Bülteni 2012, no. 4 (2014): 6. http://dx.doi.org/10.17693/yunusae.v2012i21907.235429.
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Daban, İsmail Burak, Mukadder Arslan İhsanoglu, and Ali İsmen. "Relationships between body size - otolith size for seven demersal fish species from the Marmara Sea, Turkey." Ege Journal of Fisheries and Aquatic Sciences 37, no. 3 (2020): 267–74. http://dx.doi.org/10.12714/egejfas.37.3.09.
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The total length-otolith length (TL-OL), total length-otolith width (TL-OWi), total length-otolith weight (TL-OW) and total weight-otolith weight (TW-OW) relationships of seven fishes in the Marmara Sea, Turkey were calculated. Measurements of sagittal otoliths (length, width and weight) and individuals (total length and total weight) from these species (Gaidropsarus biscayensis, Mediterranean bigeye rockling; Arnoglossus kessleri, Scaldback; Solea solea, Common sole; Uranoscopus scaber, Stargazer; Lophius budegassa, Blackbellied angler, Lepidorhombus boscii, The four-spot megrim and Lesueurigobius friesii, Fries's goby) were given. Linear regression analysis (y = bx + a) was used to determine the relationship between each morphometric character and the coefficient of determination (r2) were calculated. Highest determination coefficient were determined for L. budegassa and A. kessleri to TW-OW, for S. solea, and U. scaber to TL-OL, for G. biscayensis and L. boscii to TL-OWi, for L. friesii to TL-OW. The relatively lower determination coefficients were found for G. biscayensis, compared with others. These relationships provide vital information on species identification and size estimation of fish in predator-prey studies, we believe these results will be useful in future studies of stomach contents.
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Jawad, Laith, Pierre Gnohossou, and Ayoko Géraldine Tossou. "Bilateral asymmetry in the mass and size of otolith of two cichlid species collected from Lake Ahémé and Porto-Novo Lagoon (Bénin, West Africa)." Anales de Biología, no. 42 (March 25, 2020): 9–20. http://dx.doi.org/10.6018/analesbio.42.02.
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Asimetría bilateral en la masa y el tamaño de otolitos de dos especies de cíclidos capturados en el lago Ahémé y la laguna de Porto Novo (Benín, África Occidental) Se estudia la asimetría de la masa del otolito sacular en dos especies de peces cíclidos Sarotherodon melanotheron y Coptodon guineensis recolectadas del lago Ahémé y la laguna Porto-Novo, Benín, África occidental. La longitud y el ancho de los otolitos de especímenes adultos de ambas especies se usaron para calcular la asimetría fluctuante en estos dos caracteres. Los resultados muestran que el nivel de asimetría del ancho del otolito es el más importante. La posible causa de la asimetría en estas especies se ha discutido en relación con diferentes contaminantes en el área. Nuestros datos no muestran diferencias significativas, aunque varios estudios demostraron una asimetría más alta en individuos más grandes (de más edad). Saccular otolith mass asymmetry is studied in two cichlid fish species Sarotherodon melanotheron and Coptodon guineensis collected from Lake Ahémé and Porto-Novo Lagoon, Bénin, West Africa. The length and width of otoliths from adult specimens of both species were used to calculate the fluctuating asymmetry in these two characters. The results show that the level of asymmetry of the otolith width is the most important. The possible cause of the asymmetry in these species has been discussed in relation to different pollutants in the area. Our data show no significant difference, although several studies proved a higher asymmetry in larger (older) individuals.
Dissertations / Theses on the topic "Otolit"
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Andersson, Magdalena. "Utvärdering av rörelsemönster hos öring (Salmo trutta) utifrån otolitmikrokemi." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-34636.
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The classic view of trout (Salmo trutta) life history is that trout begins its life in freshwater, migrates to the ocean after about 1-4 years and then returns to freshwater to spawn. As trout fry have been caught at the mouth of the River Emån, near the Baltic Sea, researchers have speculated that some trout emigrate during their first year of life. The purpose of this study was to describe the variation in the length of time trout reside in freshwater before they migrate to the ocean for the first time. Another purpose was to investigate whether it was possible to discern where and how long the fish spent in freshwater and saltwater during different parts of their lives. Between 2007 and 2009, 23 adult trout were captured in the River Emån in southeastern Sweden. From each fish, a microchemical analysis of the sagitta otolith was conducted. The analysis focused on measuring the ratio of strontium:calcium from the center of the otolith to its outer edge at 6μm intervals. Based on this analysis, I found that 26% of the trout in the population emigrated to sea before they had reached the age of one. The largest proportion (48%) of trout emigrated between 1 to 2 years of age. The results of my study indicated that there was a significant correlation between age and the number of times that the fish remained in freshwater. I also analyzed the ratio of zinc:calcium and manganese:calcium. The analysis of zinc showed annual fluctuations, including a high value during the fish's first year and a seasonal pattern, with higher values of Zn:Ca in spring and summer. My results also showed some variation of the trace element manganese, half of the fish showed a peak in their first year. The results of this study indicate that by analyzing the concentrations of trace elements in otoliths one can describe individual variation in brown trout movement patterns and life history.<br>Den klassiska bilden för örings (Salmo trutta) livshistoria är att den växer upp i sötvatten, vandrar ut till havet efter ca 1-4 år för att sedan återvända till sötvatten för att leka. Då det fångats laxfiskyngel nära mynningen av Emån vid Östersjön har man funderat på om en del öringar utvandrar till havet under sitt första levnadsår. Syftet med denna studie var att beskriva variation i hur lång tid öringar vistas i sötvatten innan de utvandrar till havet för första gången. Ytterligare ett syfte var att undersöka om det gick att urskilja var och hur länge fiskarna vistades i söt- och saltvatten under olika delar av fiskarnas liv. Under åren 2007 till 2009 infångades 23 vuxna öringar i Emån i sydöstra Sverige. Från varje individ gjordes en mikrokemisk analys av sagittaotoliternas spårämnes sammansättning. En analys handlade om att mäta koncentrationen strontium:kalcium från otolitens mitt till dess ytterkant i steg om 6μm. Baserat på denna analys fann jag att 26 % av öringarna i populationen utvandrat till havet innan de hade nått ett års ålder. Den största andelen öringar utvandrade mellan 1 till 2 års ålder. Resultatet av min undersökning indikerade att det fanns ett signifikant samband mellan ålder och antal gånger som fisken vistats i sötvatten. Jag utförde även analys av kvoten zink:kalcium och mangan:kalcium. Analysen av zink visade på årliga svängningar med bl.a. ett högt värde under individens första år samt ett säsongsmönster med högre värden under vår och sommar. Mina resultat påvisade även en viss variation av spårämnet mangan där hälften av individerna markerade en tydlig topp under sitt första år. Resultaten från denna studie visar att genom att analysera spårämnens olika koncentrationer i otoliter kan man beskriva individuell variation i öringens rörelsemönster och livshistoria.
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Akin, Faith W. "Otolith Assessment." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/2434.
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Murnane, Owen D. "Otolith Function Tests." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/1941.
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Mapp, J. "Morphometric otolith analysis." Thesis, University of East Anglia, 2015. https://ueaeprints.uea.ac.uk/59388/.
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Fish otoliths have long played an important role in sustainable fisheries management. Stock assessment models currently used rely on species specific age profiles obtained from the seasonal patterns of growth marks that otoliths exhibit. We compare methods widely used in fisheries science (elliptical Fourier) with an industry standardised encoding method (MPEG7 - Curvature-Scale-Space) and with a recent addition to shape modelling techniques (time-series shapelets) to determine which performs best. An investigation is carried out into transform methods that retain size-information, and whether the boundary encoding method is impacted be otolith age, performing tests over three 2-class otolith datasets across six discrete and concurrent age groups. Impact of segmentation methods are assessed to determine whether automated or expert segmented methods of boundary extraction are more advantageous, and whether constructed classifiers can be used at different institutions. Tests show that neither time-series shaplets nor Curvature-Scale-Space methods offer any real advantage over Fourier transform methods given mixed age datasets. However, we show that size indices are most indicative of fisheries stock in younger single-age datasets, with shape holding more discriminatory potential in older samples. Whilst commonly used Fourier transform methods generally return best results; we show that classification of otolith boundaries is impacted by the method of boundary segmentation. Hand traced boundaries produce classifiers more robust to test data segmentation methods and are more suited to distributed classifiers. Additionally we present a proof of concept study showing that high energy synchrotron scans are a new, non-invasive method of modelling internal otolith structure, allowing comparison of slices along near infinite numbers of virtual complex planes.
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Randon, Marine. "Structure spatiale et connectivité au sein du stock de sole commune de Manche Est : Apport d’une approche holistique multitraceur." Thesis, Rennes, Agrocampus Ouest, 2020. http://www.theses.fr/2020NSARH112.
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La sole commune (Solea solea) est un poisson plat nourricerie-dépendant ayant été surexploité en Manche Est (division VIId). L’une des causes de ce déclin pourrait être le décalage entre l’unité de gestion (stock) et l’unité fonctionnelle (population). L’objectif de cette thèse était de déterminer la structure spatiale du stock de sole commune de Manche Est en se focalisant sur les stades de vie préadultes et adultes et de statuer sur le potentiel décalage entre l’unité de stock et la population sous-jacente. Pour cela, une approche holistique multitraceur a été développée en combinant des approches populationnelles et individuelles.D’abord, une étude de la croissance populationnelle et de la synchronie des abondances aux âges a mis en évidence l’existence d’un signal à long terme de structure spatiale du stock en trois sous-unités avec l’isolement probable de l’une d’entre elles. Ensuite, des analyses génétiques, de forme des otolithes et de microchimie des otolithes ont mis en évidence une structure spatiale en trois sousunités. Enfin, un Indice semi-quantitatif de Différentiation du Stock a suggéré une forte structure spatiale en trois sous-unités. Ainsi, cette thèse a démontré une structure de type métapopulation de la sole commune en Manche Est qui devrait être prise en compte dans le processus d’évaluation et de gestion du stock afin d’atteindre une gestion durable<br>The common sole (Solea solea) is a nursery-dependent flatfish that has been overexploited in the Eastern English Channel stock (division VIId). An explanation of such decline could be the misalignment between the management unit (stock) and the biological unit (population). This thesis aimed at assessing the spatial structure of the Eastern English Channel stock of common sole by focusing on sub-adults and adults and determining the potential mismatch between the stock unit and the underlying population. To do so, a multitracer holistic approach was developed by combining population and individual-based approachesFirst, analyses of population growth and synchrony of abundances-at-age series revealed the existence of a long-lasting signal of spatial stock structure made of three subunits with potential isolation ofone of these subunits. Then, genetics, otolith shape and otolith microchemistry analyses highighted three subunits within the stock. Finally, a semiquantitative Stock Differentiation Index suggested a strong spatial structure in three subunits. Therefore, this thesis evidenced a metapopulation structure of the common sole of the Eastern English Channel that should be integrated in the assessment – management process to provide a sustainable exploitation of the stock
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Akin, Faith W., and Owen D. Murnane. "Tests of Otolith Function." Digital Commons @ East Tennessee State University, 2010. https://dc.etsu.edu/etsu-works/1937.
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Hall, Courtney D., Faith W. Akin, and Owen D. Murnane. "Otolith Dysfunction and Postural Stability." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/1929.
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Murnane, Owen D. "Clinical Assessment of Otolith Organ Function." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/1930.
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Akin, Faith W., and Owen D. Murnane. "ASHA Perspectives: Clinical Assessment of Otolith Function." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/1794.
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The two otolith organs (the saccule and utricle) are positioned perpendicular to each other and sense linear acceleration, head tilt, and gravity, with the primary role of providing input to the vestibulospinal reflex for postural stability. The vestibulospinal reflex serves to modulate posture via two descending pathways that aid in tonic contractions of the antigravity muscles in the arms and legs (lateral vestibulospinal tract) and activate neck motoneurons for the coordination of neck and eye movements (medial vestibulospinal tract). The lateral vestibulospinal tract receives the majority of its input from the otoliths and the cerebellum, whereas the medial vestibulospinal tract receives the majority of its input from the semicircular canals.
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Lavergne, Edouard. "Biodiversité des poissons estuariens de l'Ile de Socotra (Nord-Ouest de l'Océan Indien) : du peuplement ichtyologique au fonctionnement des populations de Terapon jarbua." Thesis, Brest, 2012. http://www.theses.fr/2012BRES0093/document.
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La compréhension de la connectivité entre les nourriceries estuariennes et les habitats marins est fondamentale pour l'étude de la dynamique des peuplements et des populations de poissons et pour la conception de stratégies efficaces de conservation et de gestion des pêches. Le but de ce travail était donc de fournir une première référence faunistique et écologique des poissons des estuaires et du lagon de l'île de Socotra (Nord-Ouest de l'Océan Indien) pour les gestionnaires de la zone côtière, avec un accent particulier sur le fonctionnement des populations d'une espèce sentinelle: Terapon jarbua. Dans cette étude, une approche multidisciplinaire a été développée afin de comprendre le fonctionnement et l'importance des estuaires (TOCE's : Temporarily Open / Closed Estuaries) et du lagon de l'île de Socotra pour les poissons marins. Différents outils de la biologie et de la chimie (taxonomie, écologie, phylogéographie, génétique des populations, microstructure et microchimie des otolithes) ont été utilisés et les principales conclusions de ce travail sont les suivantes: 1) Les estuaires de Socotra sont composés de 64 espèces dans 30 familles, un chiffre élevé par rapport aux normes régionales. La comparaison avec les inventaires faunistiques d'Afrique du Sud et du Yémen suggère que Socotra joue le rôle de tremplin biogéographique, en permettant la connexion d'une grande variété de groupes taxonomiques provenant de différentes unités biogéographiques. De plus 33 des 64 espèces recensées sont considérées comme importantes pour l'économie locale, soulignant l'importance primordiale des estuaires comme sites de fraie et nourriceries, pour le fonctionnement durable des services écosystémiques. 2) La phylogéographie et la structure génétique des populations de T. jarbua ont été analysées considérant des marqueurs de type Cytochrome c Oxydase sous-unité I et microsatellites. Une différenciation génétique élevée et significative a été observée à l'échelle de l'Indo-Ouest Pacifique. Trois groupes de populations ont pu être identifiés, le groupe du Nord-Ouest de l'Océan Indien (Socotra, Yémen et Iran), le groupe de l'Ouest de l'Inde et le groupe de la Mer de Chine. Cependant, les grandes différences nucléotidiques observées soulèvent certaines questions concernant l'identification de l'espèce et suggèrent que T. jarbua pourrait être en réalité un complexe d'espèces, en dépit du fait que la coloration caractéristique de T. jarbua facilite son identification. A l'échelle plus restreinte du Nord-Ouest de l'Océan Indien, une expansion récente de la population de T. jarbua après des extinctions locales au cours des glaciations du Pléistocène pourrait expliquer la faible mais significative différenciation génétique. Le génotypage des marqueurs microsatellites souligne une différenciation génétique relativement élevée et significative entre les estuaires, sur le secteur Socotra-Yémen. Si la distance géographique n'est pas un facteur structurant majeur des populations de T. jarbua dans la région du Golfe d'Aden, le lien étroit entre les juvéniles T. jarbua et les TOCE, ainsi que les phénomènes d'ouverture associés à de possibles goulots d'étranglement démographiques dans ces systèmes côtiers, peuvent expliquer la mise en place d'une différenciation génétique locale significative entre les estuaires. Bien que l'environnement dynamique de la région puisse limiter la différenciation génétique, la courte durée du stade larvaire de cette espèce (25 jours estimés par la lecture des microstructures de l'otolithe) et la possible rétention des larves dans certains secteurs peuvent réduire l'homogénéisation à plus grande échelle géographique. 3) Les analyses de la composition élémentaire des nucleus d'otolithes suggèrent l'existence de plusieurs zones de fraie marines ; ces données confrontées aux résultats des investigations en génétique des populations suggèrent un modèle régional de métapopulation composée de sous-populations ouvertes…<br>Understanding connectivity between estuarine nurseries and marine habitats is fundamental to explore fish population dynamics and to the design of effective conservation and fisheries management strategies. The aim of this work was to provide the first faunistic and ecological baseline of Socotra Island (North-Western Indian Ocean) estuaries and lagoon fishes for governmental coastal managers and decision makers, with a particular focus on the population functioning of a sentinel species: Terapon jarbua. In this study, a multidisciplinary approach was developed to understand the functioning and importance of Socotra estuaries (TOCE's: Temporarily Open / Close Estuaries) and lagoons for marine fishes. Several biological and chemical tools (taxonomy, ecology, phylogenetics, population genetics, otolith microstructure, otolith microchemistry) were used and the main findings of this work are as follows: 1) Socotra estuaries are composed of 64 species in 30 families, a high figure by regional standards. The comparison with faunistic records from South Africa and Yemen mainland provides further support to Socotra's function as a biogeographic "stepping stone" for certain species. Moreover 33 out of the 64 recorded species were considered as relevant species for the local economy. This underscores the paramount importance of these coastal water bodies as spawning and nursery sites and for the sustainability of vital provisioning ecosystem services. 2) The phylogeography and the genetic structure of T. jarbua populations were analyzed considering Cytochrome c Oxidase subunit I and microsatellites and underlined two patterns of genetic structure. A high and significant genetic differentiation was observed at the scale of the Indo-West Pacific. Three population clusters could be drawn, the North-Western Indian Ocean cluster (Socotra, Yemen and Iran), the West Indian Shelf cluster and the Chinese Sea cluster. However, the large number of nucleotide differences raised some issues concerning the species identification as T. jarbua might be a species complex, despite the fact that it shows a characteristic color pattern easily identifiable. At the restricted scale of the North-Western Indian Ocean, recent population expansion after local extinctions during the Pleistocene glaciations might explain small but significant genetic differentiation. Considering microsatellites, genotyping highlighted a relatively high and significant genetic differentiation between estuaries, over the Socotra-Yemen region. Geographical distance is not a major structuring factor for T. jarbua populations in the wider Gulf of Aden region. The strict link between juvenile T. jarbua and TOCE's, and the opening/closing associated with possible demographic bottlenecks, could increase the local differentiation among estuaries. Although the dynamic environment of the region driven by the monsoon system could reduce the genetic differentiation between populations, the short larval stage duration and potential larval retention in particular sectors might reduce homogenization over larger geographical scale. 3) The analysis of otolith nucleus elemental composition suggested the existence of several marine spawning grounds, thus confirming the population genetics approach suggesting a regional model of metapopulation composed of open subpopulations (i.e. multiple sources and more or less pronounced mixtures of larval flows displaying a spatio-temporal variability). In addition, transect Sr:Ba ratio analysis along the otolith growth axis showed clear pattern of post larval migrations into estuarine nurseries where individuals remain for two years. Finally, otolith edges elemental fingerprint assignation tests to nurseries were highly accurate and could conduct in the future to the assessment of the contribution level of a particular nursery to the adult population of T. jarbua as well as others ecologically or economically important species
Books on the topic "Otolit"
Book chapters on the topic "Otolit"
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Khalil, Michael. "Otolith." In Encyclopedia of Evolutionary Psychological Science. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-16999-6_988-1.
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Tona, Yosuke, and Akiko Taura. "Otolith." In Regenerative Medicine for the Inner Ear. Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-54862-1_8.
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Khalil, Michael. "Otolith." In Encyclopedia of Evolutionary Psychological Science. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-19650-3_988.
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Thorrold, Simon R., and Stephen E. Swearer. "Otolith Chemistry." In Reviews: Methods and Technologies in Fish Biology and Fisheries. Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-5775-5_8.
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Brandt, T. "Otolithic Vertigo." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059110.
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Sans, A., C. J. Dechesne, and D. Demêmes. "The Mammalian Otolithic Receptors: A Complex Morphological and Biochemical Organization." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059109.
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Berthoz, A., and D. Rousie´. "Physiopathology of Otolith-Dependent Vertigo." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059111.
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O¨dkvist, L. "Clinical and Instrumental Investigational Otolith Function." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059112.
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Van Nechel, Ch, M. Toupet, and I. Bodson. "The Subjective Visual Vertical." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059113.
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Wiener-Vacher, S. "Clinical Application of the Off Vertical Axis Rotation Test (OVAR)." In Otolith Function and Disorders. KARGER, 2000. http://dx.doi.org/10.1159/000059114.
Full textConference papers on the topic "Otolit"
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Grant, J. Wallace, and William A. Best. "Otolith Biomechanics." In Intersociety Conference on Environmental Systems. SAE International, 1988. http://dx.doi.org/10.4271/881074.
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Grant, W. "Otolith biomechanics." In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1988. http://dx.doi.org/10.1109/iembs.1988.94645.
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Jadeed, R., A. Aljaber, J. Ilgner, and M. Westhofen. "Otolith dysfunction in bilateral vestibulopathys." In Abstract- und Posterband – 90. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Digitalisierung in der HNO-Heilkunde. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1686410.
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Cao, F., and R. Fablet. "Automatic morphological detection of otolith nucleus." In Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004. IEEE, 2004. http://dx.doi.org/10.1109/icpr.2004.1334602.
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"OTOLITH IMAGE ANALYSIS BY COMPUTER VISION." In International Conference on Bio-inspired Systems and Signal Processing. SciTePress - Science and and Technology Publications, 2008. http://dx.doi.org/10.5220/0001067204900497.
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Avallone, E., H. Schmitt, G. Lilli, et al. "Otolin-1: Ein möglicher Biomarker für Innenohrkrankheiten." In Abstract- und Posterband – 89. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Forschung heute – Zukunft morgen. Georg Thieme Verlag KG, 2018. http://dx.doi.org/10.1055/s-0038-1640242.
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Soria, Jose Antonio, Kamal Nasreddine, Vicenc Parisi-Baradad, Lluis Ferrer-Arnau, and Abdesslam Benzinou. "Otolith shape classification for fish stock discrimination." In 2014 First International Image Processing, Applications and Systems Conference (IPAS). IEEE, 2014. http://dx.doi.org/10.1109/ipas.2014.7043302.
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Avallone, E., H. Schmitt, G. Lilli, et al. "Otolin-1-Spiegel als mögliche Zeichen einer Innenohrschädigung." In Abstract- und Posterband – 91. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Welche Qualität macht den Unterschied. © Georg Thieme Verlag KG, 2020. http://dx.doi.org/10.1055/s-0040-1711811.
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Okeke, Marie-Urlima, Sonya T. Smith, and Werner Graf. "A Computational Model of Vestibular Fluid Response to Human Body Rotation." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67035.
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A computational model was developed to study the response of vestibular fluid to body motions, relating eye movement to vestibular displacement. The response in the semicircular canals (SCCs) and otolith organs were approximated as a torsional pendulum and a forced wave equation, respectively. The results of the math model were found to be consistent with results found in previous models. The results of the model will also be compared to those found experimentally using VALUS, a rotational platform updated to be used for vestibular testing.
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Fablet, R., N. Le Josse, and A. Benzinou. "Automatic fish age estimation from otolith images using statistical learning." In Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004. IEEE, 2004. http://dx.doi.org/10.1109/icpr.2004.1333821.
Full textReports on the topic "Otolit"
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Stanton, James Kevin. Otowi Well No. 4 Analytical Results. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1618320.
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Grissett, James D. Mathematical Model for Interaction of Canals and Otoliths in Perception of Orientation, Translation, and Rotation. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada280897.
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