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Showing 1 to 20 of 86 for “"Otoliths"”.
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Development of a device for whole body stimulation of the otoliths
… of providing whole body stimulation of the otoliths, The design of this device is presented in detail in this thesis along with its performance characteristics. When subjected to the vestibular stimulation that this device will provide, persons will theoretically experience a reduction in …
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Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths
Geochemical signatures in the otoliths of diadromous fishes may allow for retrospective analyses of natal origins. In an assessment of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid native to the Atlantic coast of North America, stable isotope and elemental …
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Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths
Geochemical signatures in the otoliths of diadromous fishes may allow for retrospective analyses of natal origins. In an assessment of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid native to the Atlantic coast of North America, stable isotope and elemental …
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A Nano-Scale Chemical and Structural Characterization of Chinook Salmon (Oncorhynchus tshawytscha) Otoliths Using a FIB and HRTEM
… of Chinook salmon (Oncorhynchus tshawytscha) otoliths. The nano-scale chemistry and structure of these regions was characterized in thin section using scanning electron microscopy (SEM) in conjunction with cathodoluminescence (CL) and high resolution transmission electron microscopy (HRTEM). …
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Use of High Pressure Liquid Chromatography to Detect and Quantify Oxytetracycline Marks in Walleye Otoliths and Dorsal Spines
… alternative for detecting and quantifying OTC in otoliths of fry-marked and spines of fingerlingmarked walleyes. Study objectives were to validate methodology of extraction of OTC from calcified tissue, detect and quantify extracted OTC using HPLC, and determine a cost comparison of current visual …
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Experimental Investigation of Elemental Incorporation in the Otoliths of Larval and Juvenile Fish: Implications for Use as Environmental Recorders
… is the use of elemental signatures in fish otoliths (ear stones), which record valuable life history data and serve as the link between fish and their environment. To validate the assumption that otolith elemental composition is a function of water elemental concentrations, and to address …
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Age Validation and Reproductive Biology of Bluefish, <i>Pomatomus saltatrix,</i> Along the East Coast of United States
… technique that increases readability of otoliths, along with criteria for the interpretation of otolith microstructure of bluefish, <em>Pomatomus saltatrix</em>, collected from Florida to New York during 2001-2003 (<em>n</em> = 2652). I validated annulus formation in otoliths for ages 1 …
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Aging Validation, Growth, and Comparison of Four Age Estimators of the River Redhorse (Moxostoma Carinatum)
Four possible age estimators of river redhorse, otoliths, opercles, scales, and fin rays, were compared for accuracy, precision, and reliability. Validation of annulus formation, using marginal increment analysis, indicated that opercles and otoliths form an annulus from late May to late June. …
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Otolith morphologies in the genus sinocyclocheilus
… to surface fish, and specifically that their otoliths are larger. Otoliths are functionally important and easy to measure components of fish hearing systems. The size, shape, and volume of otoliths were measured as a first step in identifying and understanding evolutionary changes in hearing …
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Age, Growth, and Population Structure of Black Redhorse (Moxostoma Duquesnei) and Golden Redhorse (Moxostoma Erythrurum) in Southwest Missouri
Otoliths (lapilli) were used to age black redhorse (Moxostoma duquesnei) and golden redhorse (Moxostoma erythrurum) from three White River tributaries (James River, Bull Creek, and Swan Creek) and one Arkansas River tributary (Elk River) in southwest Missouri. Validation of annulus formation in …
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Relating Water and Otolith Chemistry in Chesapeake Bay, and Their Potential to Identify Essential Seagrass Habitats for Juveniles of an Estuarine-Dependent Fish, Spotted Seatrout (<i>Cynoscion nebulosus</i>)
… the habitat-specific natural tags contained in otoliths. To this aim I investigated the variability in the chemistry of surface waters and otoliths of juvenile spotted seatrout, <em>Cynoscion nebulosus</em>, in five seagrass habitats of Chesapeake Bay, namely: Potomac, Rappahannock, York, …
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The Aging of Two Madtom Catfish Species From a Southwest Missouri Stream
… albater), were aged using pectoral spines and otoliths. Validation was provided using marginal increment analysis, a technique which monitors the seasonal progression of otolith annulus formation in the population throughout the year. Spine age estimates were compared to otolith age estimates …
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Age, Growth, Reproduction and Population Structure of the Striped Shiner (Luxilus Chrysocephalus) and Duskystripe Shiner (Luxilus Pilsbryi) in the James River, Missouri
… shiner (Luxilus pilsbryi) using asterisci otoliths, scales, and length-frequency data. Monthly samples of both species were obtained from the headwater reaches of the James River in southwest Missouri from February 1998 to January 1999. Total samples were 242 L. chrysocephalus and 322 L. …
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Life history study of red stumpnose (Chrysoblephus gibbiceps), a South African endemic seabream
… measurements taken. Gonads, stomachs and otoliths were removed from 237 individuals and presented. Otoliths were sectioned and independently aged by three readers, age agreement was reached on 183 fish.
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Uncovering the role of biomineralisation in otolith trace element uptake by microstructural and microchemical analysis
… of aragonite and the organic matrix in otoliths of four marine species were investigated in conjunction with the otolith growth patterns and the distribution of trace and minor elemental composition. Results for otoliths of Platycephalus bassensis, Chrysophrys auratus, Trachurus …
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Age, growth, reproductive biology and diet of Spondyliosoma emarginatum (Cuvier 1830) in the West Coast National Park, South Africa
… September 2004 and February 2005. Sagittal otoliths were extracted and age estimates recorded from both whole and sectioned otoliths in order to estmate growth and mortality parameters. A total of 302 steentjies (139-312 mm fork length) was sampled of which 243 were females, 55 were males …
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Upper Missouri River Basin Aquatic GAP Fish Distribution Model Accuracy Assessment and White Sucker, Catostomus commersonii, Population Characteristics in the Upper Missouri River Basin
… condition, and other population analyses. Otoliths were assumed to provide more accurate age estimates than scales and pectoral fin ray sections. Estimated ages from pectoral fin rays and otoliths were more precise (coefficient of variation 9.9) than estimated ages from scales and otoliths …
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Age determination and growth rate of the northern Benguela saddine (Sardinops sagax)
… to determine sardine age by counting rings on otoliths and to analyse the length, age and growth through regression and Von Bertalanffy Growth models. Otoliths amounting to 826 pairs were collected from the annual sardine research survey of the Ministry of Fisheries and Marine Resources in …
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A Comparison Of Otolith Growth To Somatic Growth In Largemouth Bass, Micropterus Salmoides
… with calcein to impart fluorescent marks on the otoliths on a periodic basis. Total lengths and weights were recorded at the times of injection. Fish were maintained either under a natural photoperiod or a 12L: 12D photoperiod. After thirteen months otoliths were removed and examined. The …
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