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Relevant bibliographies by topics / Arctic char Arctic char

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Academic literature on the topic 'Arctic char Arctic char'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "Arctic char Arctic char"

1

Dennert, A. M., S. L. May-McNally, M. H. Bond, T. P. Quinn, and E. B. Taylor. "Trophic biology and migratory patterns of sympatric Dolly Varden (Salvelinus malma) and Arctic char (Salvelinus alpinus)." Canadian Journal of Zoology 94, no. 8 (August 2016): 529–39. http://dx.doi.org/10.1139/cjz-2016-0004.

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The trophic ecology (diet and head morphology) and migration patterns of two closely related salmonid fishes, Arctic char (Salvelinus alpinus (L., 1758)) and Dolly Varden (Salvelinus malma (Walbaum, 1792)), were examined in tributaries of Lake Aleknagik, southwestern Alaska, to test for differentiation between species. Schoener’s index of proportional overlap and multivariate analyses of diets suggested that these species had significantly different trophic niches. Arctic char and the largest individuals of both species had the most diverse diets, and sockeye salmon (Oncorhynchus nerka (Walbaum, 1792)) eggs dominated the diet of both species, especially Arctic char. Arctic char had larger jaws and wider heads than Dolly Varden of similar body length, which may contribute to interspecific diet difference. The species also differed in migration patterns; otolith microchemistry indicated that juvenile Arctic char were produced by nonanadromous mothers, whereas the mothers of the Dolly Varden had been to sea in the season prior to spawning. The species also segregate in spawning habitat (Arctic char in the lakes and Dolly Varden in streams), as well as in juvenile rearing habitat. Our study provides the first evidence of divergent feeding and migratory ecology between sympatric juvenile Arctic char and Dolly Varden, differences that may constrain hybridization and introgression between them.

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Baker, Timothy T., and L. Saree Timmons. "Precision of Ages Estimated from Five Bony Structures of Arctic Char (Salvelinus alpinus) from the Wood River System, Alaska." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 6 (June 1, 1991): 1007–14. http://dx.doi.org/10.1139/f91-118.

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Ages of 32 Arctic char (Salvelinus alpinus) were estimated from otoliths (surface-examined and broken-and-burned), vertebrae, cleithra, opercula, and subopercula. Six readers examined each structure three times, and the precision of these estimates among structures and readers was compared with means, aging differences, and analyses of variance. Surface-examined otoliths provided the most precise age estimates and were one of the easiest structures to prepare and read. Broken-and-burned otoliths produced less precise estimates for larger, older Arctic char than for smaller, younger Arctic char. Based on lack of precision, cleithra should probably not be used to age Arctic char. Although mean estimates for the five structures were not significantly different, surface-examined otoliths produced older age estimates than break and burn otoliths. We feel that surface-examined otoliths are best for precise estimation of age of Arctic char but recommend that both otolith methods be compared when aging Arctic char older than 8 yr. Scales were also examined from 30 Arctic char but were not included in the analyses after preliminary examination because age was difficult to interpret (circuli were clear on all scales, but only two or three annuli of uncertain significance could be distinguished).

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Kanagasabai, Lenin. "Real power loss reduction by arctic char algorithm." International Journal of Advances in Applied Sciences 9, no. 4 (December 1, 2020): 261. http://dx.doi.org/10.11591/ijaas.v9.i4.pp261-264.

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<span lang="IN">This </span><span>work presents Arctic Char </span><span lang="EN-GB">Algorithm (ACA) for solving optimal reactive power problem.</span><span> In North America movement of Arctic char phenomenon is one among the twelve-monthly innate actions. Deeds of Arctic char have been imitated to design the algorithm. In stochastic mode solutions are initialized with one segment on every side of to the route ascendancy; particularly in between lower bound and upper bounds. Previous to the movement, Arctic char come to a decision about the passageway based on their perception. This implies stochastic mix up of control parameters to push the Arctic char groups (preliminary solution) in mutual pathway (evolutionary operators). Projected Arctic Char </span><span lang="EN-GB">Algorithm (ACA) </span><span>has been tested in standard IEEE 14,300 bus test system and simulation results show the projected algorithm reduced the real power loss extensively.</span>

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Kornfield, Irv, and Frederick W. Kircheis. "Mitochondrial DNA and Conservation of an Aboriginal Arctic Char (Salvelinus alpinus oquassa) from Floods Pond, Maine." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 1 (January 1, 1994): 62–67. http://dx.doi.org/10.1139/f94-008.

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Periods of low water in Floods Pond, Maine, USA, during spawning seasons for an endemic population of landlocked Arctic char, Salvelinus alpinus oquassa, have contributed to several year-class failures. To determine the genetic uniqueness of these fish, samples of Arctic char from five isolated lakes in New England and eastern Canada were examined by restriction endonuclease analysis of mitochondrial DNA (mtDNA) and compared with samples of lake trout (Salvelinus namaycush) and Arctic char from Scandinavia. Results suggest that (1) Arctic char of eastern North America should all be considered members of Salvelinus alpinus oquassa, (2) char from Floods Pond possess a unique mtDNA banding pattern for one restriction enzyme not observed in fish from any other sampled locality (this difference delineates a distinct lineage of Arctic char whose preservation is warranted on genetic grounds), and (3) unique banding patterns did not characterize any other studied char population, including geographic variants (these populations may be viewed as genetically homogeneous, and none warrant individual protection based upon our genetic characterizations). We contend that genetically identified lineages in the early stages of divergence warrant preservation.

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Persson, Lennart, Per Arne Amundsen, André M. De Roos, Rune Knudsen, Raul Primicerio, and Anders Klemetsen. "Density-dependent interactions in an Arctic char – brown trout system: competition, predation, or both?" Canadian Journal of Fisheries and Aquatic Sciences 70, no. 4 (April 2013): 610–16. http://dx.doi.org/10.1139/cjfas-2012-0175.

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In the study of mechanisms structuring fish communities, mixed competition–predation interactions where large predators feed on prey fish versus those in which small predators compete with prey fish for a shared prey have been the focus of substantial research. We used a long-term data set from a system inhabited by brown trout (Salmo trutta) (predator) and Arctic char (Salvelinus alpinus) (prey) to evaluate whether mixed interspecific interactions were present in this system as suggested in other studies focusing on this species pair. We found no evidence for a negative interspecific density dependence in individual performance in either Arctic char or brown trout. In contrast, a negative intraspecific density dependence was present, especially in Arctic char. Furthermore, large brown trout condition showed a positive response to encounter rate with Arctic char (related to the density of small Arctic char). The most parsimonious interaction module to explain the Arctic char – brown trout interaction patterns in the studied system does therefore not need to include interspecific competition. We suggest that size-structured mixed competition–predation interactions in different systems are realized as being either mainly structured through interspecific predation or by competition depending on species life history characteristics and environmental conditions.

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Finstad, Anders G., Peder A. Jansen, and Arnfinn Langeland. "Gillnet selectivity and size and age structure of an alpine Arctic char (Salvelinus alpinus) population." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 8 (August 1, 2000): 1718–27. http://dx.doi.org/10.1139/f00-071.

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The aim of the present study was to address possible implications of biased sampling for the commonly adopted uni- and bi-modal size structures and unimodal age structures in Arctic char (Salvelinus alpinus) populations. Multimesh gill nets were used to sample an allopatric population of Arctic char in an alpine lake in central Norway. Direct estimates of gillnet selectivity for different length-classes of Arctic char were obtained by mark-recapture experiments and by successive removal methods. The observed size and age structure in gillnet samples was significantly different from the estimated size and age structure of the Arctic char population when catches were corrected for gillnet selectivity. An observed unimodal size and age structure was a direct result of gillnet selectivity, as smaller and younger fish were underrepresented in gillnet catches. Moreover, an abrupt increase in gillnet selectivity for large Arctic char was related to a niche shift to cannibalism. A model that explains bimodal size distributions in gillnet catches as a result of ontogenetic behavioural change is presented. Complex ontogenetic growth and mortality patterns that have been suggested to be essential in structuring modal Arctic char populations were superfluous in explaining the observed modal population structure in the present study.

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Petersen, Karina, Maria T. Hultman, Jenny Bytingsvik, Mikael Harju, Anita Evenset, and Knut Erik Tollefsen. "Characterizing cytotoxic and estrogenic activity of Arctic char tissue extracts in primary Arctic char hepatocytes." Journal of Toxicology and Environmental Health, Part A 80, no. 16-18 (September 1, 2017): 1017–30. http://dx.doi.org/10.1080/15287394.2017.1357277.

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Hara, Toshiaki J., Torarinn Sveinsson, Robert E. Evans, and Dorthy A. Klaprat. "Morphological and functional characteristics of the olfactory and gustatory organs of three Salvelinus species." Canadian Journal of Zoology 71, no. 2 (February 1, 1993): 414–23. http://dx.doi.org/10.1139/z93-058.

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Morphological features and response characteristics of the olfactory and gustatory organs were studied in three char species, Arctic char (Salvelinus alpinus), brook char (S. fontinalis), and lake char (S. namaycush). In brook, lake, and Norwegian-stock Arctic chars the olfactory rosette consisted of 12–16 primary olfactory lamellae radiating from the rostro-caudally oriented raphe, with the secondary folding typical of salmonids. Nauyuk-stock Arctic char had fewer (7–9) olfactory lamellae without secondary folding. Electro-olfactogram response characteristics to L-cysteine, L-arginine, and L-glutamate, representing neutral, basic and acidic amino acids, respectively, were similar, with threshold concentrations of 10−9–10−8 M. Structure–activity relationship studies showed that the amino acid spectrum for Arctic char differed from those of brook and lake chars. Most characteristic was that esterification of the carboxyl group of L-arginine enhanced its effectiveness. The taste buds were generally distributed in rows oriented anterior–posterior in the palate. Each species showed distinct distribution patterns, and the highest densities (up to 40/mm2) of palatal taste buds were counted in brook char. The palatine nerve of the three species responded specifically to L-proline, hydroxy-L-proline, and L-alanine. Adaptation to L-proline eliminated responses to hydroxy-L-proline and L-alanine. No response was registered to betaine, one of the most potent gustatory stimulants for teleosts. Tetrodotoxin, quinine, and strychnine were potent gustatory stimulants in the three species. The detection threshold for tetrodotoxin was lower than for L-proline in Arctic char. We conclude that the three char species have only one main palatine gustatory amino acid receptor, that for L-proline.

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Salisbury, Sarah J., Connor Booker, Gregory R. McCracken, Tom Knight, Donald Keefe, Robert Perry, and Daniel E. Ruzzante. "Genetic divergence among and within Arctic char (Salvelinus alpinus) populations inhabiting landlocked and sea-accessible sites in Labrador, Canada." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 8 (August 2018): 1256–69. http://dx.doi.org/10.1139/cjfas-2017-0163.

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Anadromous, resident, and landlocked Arctic char (Salvelinus alpinus) differentially experience drift and gene flow, making them ideal for studying incipient divergence. We investigated genetic divergence within and among char occupying landlocked and sea-accessible sites in Labrador, Canada, using 11 microsatellites. Unlike anadromous char, landlocked char were highly genetically differentiated. Genetic subgroups were detected within landlocked and sea-accessible sites. Within Ramah Lake (a sea-accessible site containing two subgroups), one subgroup matured at a small size, and both subgroups had equal proportions of males to females. These findings refute residency as a sneaker male tactic and instead suggest the presence of reproductively isolated resident and anadromous char. Subgroups demonstrated equal frequencies of Atlantic and Arctic lineage mtDNA haplotypes, suggesting their genetic differences were not due to allopatry during the last glacial maximum. Our results are therefore consistent with the sympatric genetic divergence of resident and anadromous Arctic char morphs.

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Adler, Paul R., and Lawrence J. Sikora. "Mesophilic Composting of Arctic Char Manure." Compost Science & Utilization 13, no. 1 (January 2005): 34–42. http://dx.doi.org/10.1080/1065657x.2005.10702215.

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Dissertations / Theses on the topic "Arctic char Arctic char"

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Johansen, April Doris. "Marker assisted selection for Arctic char (Salvelinus alpinus) broodstock development /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ54899.pdf.

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Linnér, Johan. "Arctic charr growth regulators : implications for aquaculture /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5778-5.pdf.

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Matolla, Geraldine Kasisi. "Effect of yeast glucan on immunostimulation of cellular non-specific defences, growth and survival of Arctic charr, Salvelinus alpinus L." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq25865.pdf.

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Michaud, Wendy K. "Phenotypic Divergence of Indigenous and Translocated Arctic Charr (Salvelinus alpinus) Populations in Maine." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/MichaudWK2006.pdf.

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Blanar, Christopher A. "Growth, proximate composition and physiology of Arctic charr exposed to toxaphene and Diphyllobothrium dendriticum." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31197.

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The Arctic charr (Salvelinus alpinus) is a top predator in northern lakes and accumulates persistent lipophilic contaminants. Toxaphene, a major organochlorine contaminant in Arctic charr, is known to be acutely toxic to fish but the effects of dietary exposure have not been examined. Furthermore, lake-resident Arctic charr are frequently infected with larvae of the cestode, Diphyllobothrium dendriticum. The objective of this study was to investigate the effects of toxaphene exposure on Arctic charr growth, nutritional quality, physiology, and susceptibility to infections of D. dendriticum. A preliminary experiment found no effect of toxaphene on charr visceral organ and fat weights, plasma Vitamin A and E and plasma cortisol, although dominance hierarchies within groups may have masked treatment effects. For the main experiment, hatchery-reared Arctic charr were subjected to one of four treatments: (i) a single oral dose of corn oil (control); (ii) a single oral dose of 10 mug/g wet weight toxaphene dissolved in corn oil; (iii) exposure to 15 larval D. dendriticum; and (iv) a combination of both. (Abstract shortened by UMI.)

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Moore, Jean-Sébastien. "Patterns and consequences of dispersal for Arctic Char (Pisces: Salvelinus alpinus) from the Canadian Arctic." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43767.

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Dispersal can have a multitude of ecological and evolutionary consequences that can be either positive or negative for population fitness and persistence. In this thesis, I describe patterns of dispersal in Arctic Char (Salvelinus alpinus), and I explored some of its consequences. I first examined the consequences of post-glacial dispersal for the distribution of genetic variation across the Canadian range of the species. MtDNA sequences and microsatellite markers provided evidence that the populations of Arctic Char currently inhabiting the Arctic Archipelago probably recolonized from a small glacial refugium, most likely located in ice-free areas of the Archipelago itself. I also presented evidence that two glacial lineages of Char (an Arctic lineage and an Atlantic lineage) probably hybridized post-glacially in the eastern Arctic. Finally, the importance of contemporary dispersal in redistributing genetic variation was illustrated by the fact that anadromous populations have greater within-population genetic diversity, and are less genetically differentiated, than landlocked populations. Second, I used a genetic assignment approach to study patterns of dispersal among populations distributed around Cumberland Sound, Nunavut. Estimates of dispersal rates varied extensively depending on the analysis method used, but all were relatively high compared to other salmonid species. I also found evidence that overwintering individuals have a greater propensity to disperse to non-natal habitats than individuals destined to spawn that year. The consequences of this behaviour for local adaptation among populations was examined using a population genetic model parameterized with estimates of gene flow obtained from microsatellite data. Third, I tested alternative hypotheses for the co-existence of sympatric migratory ecotypes in three lakes of southeast Baffin Island. Microsatellite data showed that the resident and anadromous components of the population are not genetically differentiated, suggesting that migratory behavior is not a genetically fixed trait. Together, the three parts of my thesis provide a general understanding of the patterns and consequences of dispersal for Arctic Char. Since dispersal will be crucial for the response of Arctic Char to environmental change, I conclude by discussing how my work can serve as a foundation for future work on the role of dispersal in adaptation to a changing Arctic.

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Shahsavarani, Arash. "Effects of temperature on embryonic physiology of Arctic char (Salvelinus alpinus)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0026/MQ51093.pdf.

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Bouillon, Daniel Richard. "Ecology of the Arctic charr (Salvelinus alpinus) in northern Labrador with reference to their parasite faunas." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63309.

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Idrus, Muhammad Rijal. "Multivariate morphometric analysis of seasonal changes in overwintering arctic charr (Salvelinus alpinus L.)." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27346.

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This study developed a robust technique for the assessment of morphometric differences among overwintering northern fish populations. Arctic charr were sampled soon before the freeze-up and just after ice break-up at two subarctic Quebec lakes. A homogenous sample of 397 fish was used. Regression analyses of the length-weight relationships and their derived condition indices were insufficient, due to their inherent limitations, to recognize the differences between sampling groups. A series of multivariate analyses (canonical, stepwise and discriminant analysis), based on eleven morphometric characters of the fish, provided a better assessment. The analysis recognized the distinctions between sampling groups, correctly classified 70-100% of the fish into their appropriate groupings, and indicated that body height measured at the anal opening was the most discriminatory variable. Landmark variables related to shape differences were effective in discriminating fish according to their lake of origin, whereas length and weight variables, which closely reflected the size differences, were better at distinguishing seasonal changes. The study provides a simple, efficient assessment method based on phenotypic variations to explain different survival strategies, and the associated life history traits, adopted by fish.

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Berg, Håkan. "Teleost reproduction : aspects of Arctic char (Salvelinus alpinus) oocyte growth and maturation /." Umeå : Univ, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-157.

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Books on the topic "Arctic char Arctic char"

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Johnston, Gavin. Arctic charr aquaculture. Oxford: Fishing News Books, 2002.

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Marshall, K. E. A bibliography of the arctic charr, salvelinus alpinus (L.), complex: 1993-1996. Winnipeg, Man: Central and Arctic Region, Dept. of Fisheries and Oceans, 1998.

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Marshall, K. E. A bibliography of the Arctic charr, Salvelinus alpinus (L.) complex, 1981 through 1984. Winnipeg, Man: Western Region, Dept. of Fisheries and Oceans, 1985.

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Andreassen, Gjermund. Røye. [Oslo]: Naturforlaget, 2001.

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Heuring, L. G. A bibliography of the Arctic Charr, Salvelinus alpinus (L.) complex: 1985-1990. Winnipeg, Man: Central and Arctic Region, Dept. of Fisheries and Oceans, 1991.

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Marshall, K. E. A bibliography of the arctic charr, salvelinus alpinus (L.), complex: 1990-1993. Winnipeg, Man: Central and Arctic Region, Dept. of Fisheries and Oceans, 1994.

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7

Skaugstad, Calvin. Effects of fin removal on survival and growth of arctic char in a hatchery environment. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1990.

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Johnston, Gavin. Arctic charr aquaculture. Oxford: Fishing News Books, 2002.

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McKinley, Timothy R. Mortality of arctic char and large arctic grayling captured and released with sport fishing gear. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1993.

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H, Clark John. Abundance, length, and age composition of sockeye salmon, arctic char, and least cisco in pelagic waters of Harding Lake, Alaska, 1989 and 1990. Anchorage, Alaska: Alaska Dept. of Fish and Game, Division of Sport Fish, 1991.

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Book chapters on the topic "Arctic char Arctic char"

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Beddow, Toni A., Caroline Deary, and R. Scott McKinley. "Migratory and reproductive activity of radio-tagged Arctic char (Salvelinus alpinus L.) in northern Labrador." In Advances in Invertebrates and Fish Telemetry, 249–62. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5090-3_29.

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Jakobsson, Martin. "International Bathymetric Chart of the Arctic Ocean (IBCAO)." In Encyclopedia of Marine Geosciences, 365–67. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6238-1_68.

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Jakobsson, Martin. "International Bathymetric Chart of the Arctic Ocean (IBCAO)." In Encyclopedia of Marine Geosciences, 1–4. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6644-0_68-2.

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Jakobsson, Martin. "International Bathymetric Chart of the Arctic Ocean (IBCAO)." In Encyclopedia of Marine Geosciences, 1–4. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6644-0_68-3.

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Martinkappi, J. Birgitta, Jukka Kekäläinen, Yevgeniya Shatilova, and Jussi Parkkinen. "Carotenoid Concentration of Arctic Charr (Salvelinus Alpinus L.) from Spectral Data." In Advanced Concepts for Intelligent Vision Systems, 562–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04697-1_52.

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Jansen, Peder A., Anders G. Finstad, and Arnfinn Langeland. "The relevance of individual size to management of Arctic charr, Salvelinus alpinus, populations." In Ecology, behaviour and conservation of the charrs, genus Salvelinus, 313–20. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1352-8_29.

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Jørgensen, Even Hjalmar, and Arne Mikal Arnesen. "Seasonal changes in osmotic and ionic regulation in Arctic charr, Salvelinus alpinus, from a high- and a sub-arctic anadromous population." In Ecology, behaviour and conservation of the charrs, genus Salvelinus, 185–93. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1352-8_15.

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Noakes, David L. G., Skúli Skúlason, and Sigurdur S. Snorrason. "Alternative life-history styles in salmonine fishes with emphasis on arctic charr, Salvelinus alpinus." In Alternative Life-History Styles of Animals, 329–46. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2605-9_17.

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Ferguson, Moira M., David L. G. Noakes, Skúli Skúlason, and Sigurdur S. Snorrason. "Life-history styles and somatic allocation in iteroparous arctic charr and semelparous pink salmon." In Alternative life-history styles of fishes, 267–72. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2065-1_16.

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Alekseyev, Sergey S., Vitalii P. Samusenok, Arkadii N. Matveev, and Mikhail Yu Pichugin. "Diversification, sympatric speciation, and trophic polymorphism of Arctic charr, Salvelinus alpinus complex, in Transbaikalia." In Ecology, behaviour and conservation of the charrs, genus Salvelinus, 97–114. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1352-8_8.

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Conference papers on the topic "Arctic char Arctic char"

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Asgeirsson, Saethor, and Runar Unnthorsson. "Fin Drive Propulsion." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89606.

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This paper presents the results of a study, which aimed to understand and evaluate the locomotion of Atlantic salmon and Arctic char under three different swimming conditions, slow, medium and fast swimming. A Fourier-series based numerical model that describes the swimming mode for each condition is represented. The numerical model is based on a video analysis of swimming fish. A video recording system was used to record the movement of two fish species under different swimming conditions in a swimming tunnel. The movements of eleven points on the fishes were tracked from the video recordings and logged. The movements of each point were then analyzed in Matlab and a 2nd degree Fourier model constructed to describe the motion.

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Zvyagin, Petr, and Anna Voitkunskaia. "Model of Transit Transport in Arctic Based on Graph Algorithms." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54439.

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Transportation in Arctic seas is connected with variability of routes. Availability of those routes is depending on current environmental conditions. In the paper the algorithm for navigation system, which is intended to advice captain the most economically effective and less risky route with the presence of ice chart, is proposed. Smart navigation system for Arctic seas has specific: shortest ways can occur to be impassable or too risky. More long routes through free waters can finally take less fuel comparing to shorter, but covered with ice. Thus, economical profitability of operating in Arctic seas depends on effectiveness of route choosing. To make estimations about most effective route and its length, the method based on graph algorithms is presented in this paper. The ice chart is covered by the graph, which can have form of grid, with neighbor nodes connected by edges. In general, multiple parameters can be assigned to each edge — length, maximal ice thickness on the way, risk, etc. In this paper two separate cost functions are considered: first is responsible for travel expenses, and the second is responsible for ice passability on the route. To find most economically efficient route with minimal possible ice thickness on the way the method with graph modification and Dijkstra algorithm was used. This route provides Pareto-optimal solution for reduced version of the problem. The software, which implements the method, was built. The example of searching for least expensive and Pareto-optimal route is provided. Results are discussed.

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Masuda, Mitsuhiro, Kiyokazu Minami, Koichi Masuda, and Tomoki Ikoma. "A Fundamental Study on Tsunami Damage Control of Moored Vessels Using the MPS Method." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11085.

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When the tsunami attacks in harbors, the vessels moored at the wharf may be unable to be evacuated. In such a case, damages such as, breaking the mooring tethers, grounding on a wharf, drift to land areas and the collision with buildings are assumed. This present paper describes the tsunami simulation and the motion analysis of vessel moored at the wharf using the MPS Method. In this research, the 3D-MPS method is applied. The chart of mooring tethers break was created. The wave height of tsunami and the relation of the break of the mooring tethers were shown by the chart of mooring tethers break. The chart was created about the influence of number of mooring tethers, diameter of mooring tethers and mooring system to the break of mooring tethers.

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Kawanishi, Toshimasa, and Yuko Sueda. "Ultraviolet Protection by Beach Shade." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57287.

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Ultraviolet radiation is divided into UV-A (320–400nm), UV-B (290–320nm), UV-C (under 290nm). Of these, UV-B may be cause serious health problem, such as cataracts, loss of skin immunity, and increase of skin cancer. For this reason, it is important to know how to protect human body against the UV-B radiation. Beach shade is very effective to prevent the radiation. The radiation enters to the shade from sun and sky. The first step is to measure the sky radiance distribution of sun and sky radiation spectrum. We calculate erythema action radiation from the radiation spectrum. Sunburn chart is made using distribution of the erythema action ultraviolet radiation. Using the Sunburn chart, the shade is designed for protect against the UV radiation.

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Paik, Jeom Kee, Sang Eui Lee, Bong Ju Kim, Jung Kwan Seo, Yeon Chul Ha, Toshiyuki Matsumoto, and Do Hyun Kim. "A New Method for Determining the Design Sloshing Loads for LNG FPSOs." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23730.

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The aim of this study was to develop a new method for determining nominal values for sloshing loads in the design of storage tanks in LNG FPSO (liquid natural gas, floating production, storage and offloading units). Details of the procedure are presented in a flow chart showing the key sub-tasks. The applicability of the method is demonstrated using an example of a hypothetical LNG FPSO operating in a natural gas site off a hypothetical oceanic region. It is concluded that the developed method is useful for determining the design sloshing loads of storage tanks in ship-shaped offshore LNG installations in combination with virtual metocean data and operational conditions.

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Ersdal, Gerhard. "On the Safety of Fixed Offshore Structures, Failure Paths and Barriers." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28609.

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In order to ensure the safety of an offshore structure it is important to identify and maintain the barriers preventing hazardous events. Also, when monitoring the safety, the monitoring should be regarding how well these barriers are functioning, and utilise these to reassess the safety of the structure over time. The purpose of this paper is to apply a well-known method in risk assessment, Haddon’s energy and barrier model, to a new area; structural safety. The purposes of this exercise are to look at the structural safety from a risk assessment point of view, and to use this to identify and give an overview of the existing barriers. Furthermore, the purposes are to evaluate the efficiency and redundancy of these barriers, and to use this to evaluate the safety of offshore structures. This paper will analyse the safety of a fixed offshore structure through a qualitative approach. A possible event chart for a fixed offshore installation during operation in storms is established and analysed. Some of the root causes for potential structural failure are identified. These root-causes are kept on a general level, but considered in more detail than often seen in risk analysis. Hazards that are normally included in risk analysis, like boat collisions, fire, explosions, and dropped objects are not evaluated. Hazards that are evaluated are structural failure due to wave loading, fatigue damage, aging, and gross errors in design, fabrication, installation and operation. In order to identify the barriers (hazard reduction strategies, physical barriers and vulnerable target protection strategies), the different failure paths in the event chart are then analysed using Haddon’s ten preventive strategies for reducing damage from hazards. As an example a fixed offshore steel structure is used. A list of proposed barriers that influence the safety of such a fixed offshore installation are presented, and methods to measure these barriers are discussed.

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Wang, Xin, Rui-fu Wang, Xi-fang Jin, and Cai-hong Yang. "The electronic chart symbol design and implementation based on ArcGIS platform." In 2010 Second IITA International Conference on Geoscience and Remote Sensing (IITA-GRS 2010). IEEE, 2010. http://dx.doi.org/10.1109/iita-grs.2010.5602692.

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Hao, Jiang-ling, Ming-yang Pan, De-qiang Wang, Li-ning Zhao, and De-peng Zhao. "A new web chart service and applications system based on arcgis." In 2014 33rd Chinese Control Conference (CCC). IEEE, 2014. http://dx.doi.org/10.1109/chicc.2014.6895504.

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9

Zhou, Xiaoyu, Hongxia Li, and Yi Huang. "Modified Probability Density Evolution Method for the Solution of Multi-Degree-of-Freedom Nonlinear Stochastic Dynamical Systems." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62382.

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A probability density evolution based exponential polynomial regression (PDEM-EPR) method to calculate the probability density function (PDF) of the high dimensional nonlinear stochastic dynamical systems is presented in this paper. Several typical examples, such as linear oscillator and Duffing oscillator are solved by PDEM-EPR method, and the results fit well with the analytical solutions. An engineering practice problem of ship nonlinear random roll in the beam waves is involved in this paper. The results obtained by PDEM-EPR is compared with those obtained by path integral method. The later results were given by Chai Wei [3]. It shows that PDEM-EPR method has the advantages as following: 1) The multi-degree-of-freedom (MDOF) nonlinear stochastic dynamical problems can be solved by PDEM-EPR method; 2) High efficiency can be obtained by PDEM-EPR method.

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Cochet, Christophe, and Ronald W. Yeung. "Dynamic Analysis and Configuration Design of a Two-Component Wave-Energy Absorber." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83613.

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The wave-energy absorber being developed at UC Berkeley is modeled as a moored compound cylinder, with an outer cylinder sliding along a tension-tethered inner cylinder. With rigid-body dynamics, it is first shown that the surge and pitch degrees of freedom are decoupled from the heave motion. The heaving motion of the outer cylinder is analyzed and its geometric proportions (radii and drafts ratios) are optimized for wave-energy extraction. Earlier works of Yeung [1] and Chau and Yeung [2,3] are used in the present heave-motion study. The coupled surge-pitch motion can be solved and can provide the contact forces between the cylinders. The concept of capture width is used to characterize the energy extraction: its maximization leads to optimal energy extraction. The methodology presented provides the optimal geometry in terms of non-dimensional proportions of the device. It is found that a smaller radius and deeper draft for the outer cylinder will lead to a larger capture width and larger resulting motion.

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Reports on the topic "Arctic char Arctic char"

1

Bourke, Robert H. ONR Chair in Arctic Marine Science. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada630644.

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Bourke, Robert H. ONR Chair in Arctic Marine Science. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada629020.

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3

Bourke, Robert H., and Ursula Schauer. ONR Chair in Arctic Marine Science. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada625937.

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Dewing, K., and G. S. Nowlan. Correlation chart of Cambrian and Ordovician stratigraphy, Arctic islands, Nunavut, Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/214889.

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Macnab, R., and A. Nielsen. IOC/IASC/IHO Editorial Board for the International Bathymetric Chart of the Arctic Ocean. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1999. http://dx.doi.org/10.4095/210462.

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Macnab, R., and N. Guy. IOC/IASC/IHO Editorial Board for the International Bathymetric Chart of the Arctic Ocean. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211500.

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Macnab, R., and M. Jakobsson. IASC/IOC/IHO Editorial Board for the International Bathymetry Chart of the Arctic Ocean. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/212989.

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de Freitas, T. A., J. C. Harrison, and U. Mayr. Sequence stratigraphic correlation chart of the lower Paleozoic Franklinian succession, Canadian Arctic Islands and parts of north Greenland. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/208912.

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9

Macnab, R., and M. Jones. IOC/IASC/IHO Editorial Board for the International Bathymetric Chart of the Arctic Ocean, report of meeting: Dartmouth, Canada; June 24, 1999. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211374.

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