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  • Canadian Science Publishing  (11)
  • 2010-2014  (11)
  • 1
    Online Resource
    Online Resource
    Connaissance et incertitudes en gestion des infrastructures civiles : un point de vue décisionnelLe présent ouvrage fait partie d’une série d’articles publiés dans ce numéro spécial consacré au génie hydrotechnique.
    Canadian Science Publishing ; 2010
    In:  Canadian Journal of Civil Engineering Vol. 37, No. 7 ( 2010-07), p. 1024-1033
    Details
    In: Canadian Journal of Civil Engineering, Canadian Science Publishing, Vol. 37, No. 7 ( 2010-07), p. 1024-1033
    Abstract: Sur la base d’une caractérisation de la pertinence, du niveau et du type d’incertitude, un gestionnaire peut savoir quels sont les outils les mieux adaptés pour gérer les conséquences du vieillissement d’une infrastructure sur son niveau de service. En présence d’une incertitude élevée, le gestionnaire doit disposer d’un processus de décision formalisé qui lui permet de protéger ses ressources globales. Le coût du traitement et des conséquences potentielles des risques associés à ces ressources constitue un passif à considérer comme une « provision pour risques ». Pour communiquer auprès des financeurs, cette provision peut être combinée avec la valeur résiduelle du système pour déterminer un indicateur de patrimoine. Enfin, pour suivre l’évolution de son système d’infrastructure, le gestionnaire peut utiliser la notion de turbulence issue d’une combinaison entre l’indicateur de patrimoine et la valeur actuelle nette des plans d’actions de maintenance. Cet indicateur de turbulence permet de surveiller l’équilibre entre l’efficacité économique des plans d’actions et la durabilité du patrimoine. La maîtrise de cet équilibre et de son incertain sont deux éléments essentiels du développement durable de nos infrastructures.
    Type of Medium: Online Resource
    ISSN: 0315-1468 , 1208-6029
    URL: Article
    DOI: 10.1139/L10-067
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2010
    detail.hit.zdb_id: 1490923-6
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  • 2
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    Are the Great Plains wildrye ( Elymus canadensis ) and the Siberian wildrye ( Elymus sibiricus ) conspecific? A study based on the nuclear 5S rDNA sequences
    Canadian Science Publishing ; 2012
    In:  Botany Vol. 90, No. 6 ( 2012-06), p. 407-421
    Details
    In: Botany, Canadian Science Publishing, Vol. 90, No. 6 ( 2012-06), p. 407-421
    Abstract: Elymus canadensis L. and Elymus sibiricus L. are difficult to separate by morphology. The latter is found mainly in Asia and extends into northern North America; the former is confined to North America. We obtained the DNA sequences of 135 5S rDNA units collected from 19 localities throughout their respective ranges. The results of statistical parsimony, analysis of molecular variance, and sequence polymorphism analyses show that the two taxa are not conspecific.
    Type of Medium: Online Resource
    ISSN: 1916-2790 , 1916-2804
    URL: Article
    DOI: 10.1139/b2012-013
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 2467208-7
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  • 3
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    Phylogenetic analysis of the genus Avena based on chloroplast intergenic spacer psb A– trn H and single-copy nuclear gene Acc1
    Canadian Science Publishing ; 2014
    In:  Genome Vol. 57, No. 5 ( 2014-05), p. 267-277
    Details
    In: Genome, Canadian Science Publishing, Vol. 57, No. 5 ( 2014-05), p. 267-277
    Type of Medium: Online Resource
    ISSN: 0831-2796 , 1480-3321
    URL: Article
    DOI: 10.1139/gen-2014-0075
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 2020635-5
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  • 4
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    Application of a method for estimating effective population size and admixture using diagnostic single nucleotide polymorphisms (SNPs): implications for conservation of threatened Paiute cutthroat trout ( Oncorhynchus clarkii seleniris ) in Silver King Creek, California
    Canadian Science Publishing ; 2011
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 68, No. 8 ( 2011-08), p. 1369-1386
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 68, No. 8 ( 2011-08), p. 1369-1386
    Abstract: The threatened Paiute cutthroat trout ( Oncorhynchus clarkii seleniris , PCT) is endemic to Silver King Creek, California, USA, which was stocked with non-native trout beginning in 1930. Single nucleotide polymorphism (SNP) and microsatellite data reveal that the trout population in Silver King Creek is weakly structured and composed of introgressed California golden trout ( Oncorhynchus mykiss aguabonita , CAGT), hatchery rainbow trout ( Oncorhynchus mykiss , RT), and some native PCT. Two SNP groups were analyzed: (i) one mitochondrial and five autosomal SNPs, diagnostic between Lahontan cutthroat trout ( Oncorhynchus clarkii henshawi ) or PCT and CAGT or RT and (ii) one mitochondrial and five autosomal SNPs nearly diagnostic between CAGT and RT. The five autosomal cutthroat–rainbow SNPs were used to jointly estimate the cutthroat trout mixing proportion in Silver King Creek and effective population size (N e ) of the admixed population, using a coalescent-based maximum likelihood method. Given the stocking history of Silver King Creek, there are two different scenarios that bound the range of expected point estimates for N e . We obtain point estimates of N e  = 150 and N e  = 750 for Silver King Creek under these two scenarios. This method will be useful in cases with differentiated taxa and in prioritizing conservation and restoration programs where the populations of concern are introgressed.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f2011-075
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 5
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    An age-structured state-space stock–recruit model for Pacific salmon ( Oncorhynchus spp.)
    Canadian Science Publishing ; 2013
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 70, No. 3 ( 2013-03), p. 401-414
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 70, No. 3 ( 2013-03), p. 401-414
    Abstract: We describe an age-structured state-space model for stock–recruit analysis of Pacific salmon data. The model allows for incorporation of process variation in stock productivity, recruitment, and maturation schedules, as well as observation error in run abundance, harvest, and age composition. Explicit consideration of age structure allows for realistic depiction of system dynamics and sample design, more complete use of recent data, and forecasts that consider sibling relationships. A Bayesian framework is adopted, implemented with Markov chain Monte Carlo methods, which provides an enhanced ability to incorporate auxiliary information, convenient and rigorous consideration of measurement error and missing data, and a more complete assessment of uncertainty. We fit the model to annual upstream weir counts, commercial and recreational harvest estimates, and age composition data from Chinook salmon (Oncorhynchus tshawytscha) in Karluk River, Alaska. For the case study, the model is configured with a Ricker stock–recruit relationship, autoregressive lag-1 productivity, and Dirichlet age-at-maturity. Details of alternate configurations are also described. We introduce the optimal yield probability profile as an objective tool for informing the selection of escapement goals based on yield considerations and describe alternative versions useful for addressing other management questions.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/cjfas-2012-0112
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 6
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    Codependence of repetitive sequence classes in genomes: phylogenetic analysis of 5S rDNA families in Hordeum (Triticeae: Poaceae)
    Canadian Science Publishing ; 2010
    In:  Genome Vol. 53, No. 3 ( 2010-03), p. 180-202
    Details
    In: Genome, Canadian Science Publishing, Vol. 53, No. 3 ( 2010-03), p. 180-202
    Abstract: To complete our study of the genus Hordeum and to elaborate a phylogeny of species based upon 5S rDNA sequences, we have cloned and sequenced PCR amplicons from seven American polyploid species to generate 164 new 5S rRNA gene sequences. These sequences were analysed along with the more than 2000 5S rDNA sequences previously generated from the majority of species in Hordeum to provide a comprehensive picture of the distribution (presence or absence) of 5S rDNA unit classes (orthologous groups) in this genus as well as insights into the phylogeny of Hordeum. Testing of substitution models for each unit class based upon the consensus sequences of all the taxa as well as for each unit class within the genus found that the general best fit was TPM3uf+G, from which a maximum-likelihood tree was calculated. A novel application of cophylogenetic analysis, where relationships among unit classes were treated as host–parasite interactions, depicted some significant pair links under tests of randomness indicative of nonrandom codivergence among several unit classes within the same taxon. The previous classification of four genomic groups is reflected in combinations of unit classes, and it is proposed that current taxa developed from ancient diploidized paleopolyploids and that some were subjected to gene loss, i.e., unit class loss. Finally, separate phylogenetic analyses performed for the tetraploid and hexaploid species were used to derive a working model describing the phylogeny of the polyploid taxa from their putative diploid ancestry.
    Type of Medium: Online Resource
    ISSN: 0831-2796 , 1480-3321
    URL: Article
    DOI: 10.1139/G09-096
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2010
    detail.hit.zdb_id: 2020635-5
    SSG: 12
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  • 7
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    Effects of ACC deaminase containing rhizobacteria on plant growth and expression of Toc GTPases in tomato ( Solanum lycopersicum ) under salt stress
    Canadian Science Publishing ; 2014
    In:  Botany Vol. 92, No. 11 ( 2014-11), p. 775-781
    Details
    In: Botany, Canadian Science Publishing, Vol. 92, No. 11 ( 2014-11), p. 775-781
    Abstract: The bacterial enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase plays a key role in lowering plant stress ethylene levels, thereby stimulating plant growth. The present study aims to evaluate whether the ACC deaminase producing plant growth promoting rhizobacterium (PGPR) Pseudomonas putida UW4 can maintain and promote plant growth in saline environments and modulate the expression of chloroplast import apparatus genes in salt-treated tomato plants (Solanum lycopersicum L.). Tomatoes were grown in the presence and absence of the PGPR and shoot length, fresh and dry mass, and chlorophyll concentration were measured after 6 weeks. The expression levels of the Toc GTPases of the chloroplast protein import apparatus were measured using quantitative real-time PCR. The results showed that the rhizobacteria significantly increased shoot length, shoot fresh and dry mass, and the chlorophyll concentration of tomato seedlings grown in the presence of up to 90 mmol·L –1 NaCl. Analysis showed that the expression of most of the Toc GTPase genes was upregulated in tomato seedlings after 6 weeks of exposure to NaCl, which may help facilitate the import into chloroplasts of proteins that are involved in the stress response.
    Type of Medium: Online Resource
    ISSN: 1916-2790 , 1916-2804
    URL: Article
    DOI: 10.1139/cjb-2014-0038
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 2467208-7
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  • 8
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    Multifractal patterns in the daily catch time series of smooth pink shrimp ( Pandalus jordani ) from the west coast of Vancouver Island, Canada
    Canadian Science Publishing ; 2012
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 69, No. 2 ( 2012-02), p. 398-413
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 69, No. 2 ( 2012-02), p. 398-413
    Abstract: There is an urgent need for indicators that anticipate changes in populations of exploited marine species. We modelled the complex patterns of variability found in fisheries time series that are not detected using classical models. We applied fractal analyses to detect time-invariant scaling symmetries in daily catch time series from the smooth pink shrimp ( Pandalus jordani ) fishery from the west coast of Vancouver Island, British Columbia, Canada. A universal multifractal model, which accounts for intermittent fluctuations and extreme values in a time series, provided a better fit to daily catches than a monofractal model. Multifractality is an indication of multiple scaling patterns and suggests that more than one process is affecting the variability of catches. Fractal dynamics in catch time series were found for a range of scales between 16 and 120 fishing days. To our knowledge, this is the first time that multifractality has been demonstrated for an invertebrate fishery. The multifractal model has the potential to provide an in-season estimate (up to 120 fishing days) of the variability of shrimp catches based on the variability at time scales less than 1 month. Changes in these fractal patterns may provide an early warning that conditions underlying this fishery are changing.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f2011-156
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
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  • 9
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    Variable population responses by large decapod crustaceans to the establishment of a temperate marine no-take zone
    Canadian Science Publishing ; 2011
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 68, No. 2 ( 2011-02), p. 185-200
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 68, No. 2 ( 2011-02), p. 185-200
    Abstract: In 2003, an area adjacent to Lundy Island was designated as the United Kingdom’s first no-take zone (NTZ) for nature conservation. The only significant fishery at Lundy was for lobster ( Homarus gammarus L.) and various crabs. The Lundy NTZ provided an opportunity to test hypotheses about the recovery of crustacean populations from fishing. Using an experimental potting program, we simultaneously compared changes in the crustacean populations within the NTZ with those in proximal control (Near Control) locations and two distant control (Far Control) locations. Comparisons were replicated over 4 years, and the results analysed using asymmetrical analysis of variance. There was evidence of a rapid, large increase in the abundance and sizes of legal-sized lobsters within the NTZ, and evidence of spillover of sublegal lobsters from the NTZ to adjacent areas. The NTZ also appeared to cause a small, but significant increase in the size of brown crab ( Cancer pagurus L.) and a decrease in the abundance of velvet crabs ( Necora puber L.) (the latter potentially owing to predation and (or) competition from lobsters). Unlike many previous studies, these results are unambiguous, owing to a robust asymmetrical experimental design. We suggest that regulatory and conservation agencies use this approach, which we have demonstrated to be relatively straightforward, whenever the NTZ requiring evaluation cannot be replicated.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/F10-143
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 10
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    Synthesis, characterization, and solid-state polymerization of cross-conjugated octatetraynes
    Canadian Science Publishing ; 2012
    In:  Canadian Journal of Chemistry Vol. 90, No. 11 ( 2012-11), p. 994-1014
    Details
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 90, No. 11 ( 2012-11), p. 994-1014
    Abstract: Two series of cross-conjugated 1,3,5,7-octatetraynes (1a–1l and 6a–6d) have been synthesized. UV–vis spectroscopic analysis shows that pendent groups connected to the cross-conjugated skeleton have little effect on the λ max energies, irrespective of whether the groups are electron withdrawing or donating. A number of the isolated products readily give crystals suitable for X-ray crystallography, and the solid-state structural properties of five derivatives (1k, 1l, 6a, 6c, and 6d) have been examined by X-ray crystallographic analysis. Parallel packing of the polyynes in the solid state indicates that four of the five samples are potentially suitable for topochemical polymerization, based on solid-state packing parameters θ, R, and d. Attempts to effect a solid-state reaction have been explored through UV–vis and γ-ray irradiation as well as thermal heating. The course of these reactions was monitored by differential scanning calorimetry (DSC) analysis, as well as UV–vis and solid-state 13 C NMR spectroscopy (for 1d, 1j, 1k, and 6d), which offered evidence of polymer formation from these reactions. Structural determination of the product(s), however, remains elusive.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    URL: Article
    DOI: 10.1139/v2012-075
    RVK:
    VA 2870
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 1482256-8
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