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  • 1
    Electronic Resource
    Electronic Resource
    Direct estimates of the selectivity of a multimesh and a series of single gillnets for brown trout (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 49 (1996), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Hatchery brown trout Salmo trutta (1406) of length 5–20 cm were released into a 7.5 ha shallow lake. They were recaptured with 28 multimesh gillnets of a type proposed for use in the Nordic countries and 42 single gillnets of mesh size 8–22 mm (knot to knot). Corrected for the effect of different twine thicknesses, the single nets showed the highest selectivity for 16.5 mm and smaller meshes and the multimesh nets for the larger meshes. The height of the selectivity curves increased exponentially with mesh size, and most distinctly for the multimesh nets. Over a limited range of mesh sizes the selectivity of the two types of net did not differ much. Extended over mesh sizes 10.0–55.0 mm, the catching abilities of the two types of net became considerably different.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1996.tb00003.x
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  • 2
    Electronic Resource
    Electronic Resource
    A direct estimate of gillnet selectivity for brown trout (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 46 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Five hundred pre-measured brown trout (Salmo trutta), 20 of each cm-class from 5 to 29 inclusive, were released. They were recaptured with gillnets of mesh size 8.0, 10.5, 16.0, 19.5 and 24.0 mm, measured between adjacent knots. The nets were made of clear, nylon monofilament. The modal lengths and the general shape of the selectivity curves were in agreement with earlier findings. The height of the selectivity curve (S) increased exponentially with mesh size in mm (M): S= 0.047e0.075M.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb01608.x
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  • 3
    Electronic Resource
    Electronic Resource
    Evaluating catches of salmonids taken by gillnets (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 46 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Data from 10 185 gillnetted brown trout (Salmo trutta L.) and 5777 Arctic charr [Salvelinus alpinus (L.)] were analysed. Relative to mesh size, the most efficiently caught fish length (the modal length) was somewhat larger with floated nets than with smaller nets placed on the bottom. There were no such consistent differences between the two species. Fish that exceeded the modal lengths were caught more efficiently than smaller fish. The relationship of most efficient mesh size to fish length and condition factor fitted excellently to a linear equation. Based on this equation, the selectivity curve for Arctic charr gillnetted in the Nesjø reservoir, the different efficiency of nets of 0.1 and 0.17mm twine and an equation expressing the increasing height of the selectivity curve with increasing mesh size, a model is presented to compare length frequencies and total numbers of gillnet catches taken with any combination of mesh sizes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb01609.x
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  • 4
    Electronic Resource
    Electronic Resource
    Gillnet selectivity and the efficiency of alternative combinations of mesh sizes for some freshwater fish (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 28 (1986), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The selectivity curves of nylon gillnets for burbot and two groups of Arctic charr of different fatness were found by the Gulland-Harding method. They are compared to the selectivity curves of whitefish, brown trout, and perch. Based upon these curves and the relationships between most efficient mesh size and fish length, the pooled relative efficiency of a geometrical and an arithmetical series of mesh sizes was calculated for salmonids, burbot, and perch. This efficiency of the geometrical series is different for the three groups of fish, but equal for each group over the interval between the modal lengths of the smallest and largest mesh sizes. The efficiency of the arithmetical series is also different for the three groups, increases linearly with fish length, and is valid over the interval between the modal lengths of the second smallest and the second largest mesh sizes. Each series has its special advantages, and both are easily adjusted to the fish length interval of interest. They are especially adapted for the catch of salmonids. For these, the variations of condition factor is more important than any characteristics of the species, and its influence upon the most efficient mesh size to fish length relationship and the pooled relative efficiency of the two series of nets is evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1986.tb05198.x
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  • 5
    Electronic Resource
    Electronic Resource
    Associations between 23 Quantitative Traits and 10 Genetic Markers in a Barley Cross (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 106 (1991), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Associations of 23 quantitative traits and 10 genetic marker characters were examined in 63 chromosome-doubled lines (DH-lines) derived from the F1- generation of a cross between an old and a modern spring barley variety. One fourth of the marker × trait combinations showed significant associations. More than two thirds of these associations were to earliness (heading date). Earliness was found to be controlled by two loci: the previously known eak locus and a new locus designated Ea. It is concluded that the associations of quantitative traits with the earliness loci were caused by pleiotropy. Associations were found between two absolutely linked C-bands on chromosome 3 and QTLs (quantitative trait loci) for lodging, straw diameter, and length of top internode of the straw. The three loci on chromosome 5, eak and the two linked powdery mildew loci, Mla9 and Mlk, were associated with a possible QTL for magnesium concentration in grain. Association to the C-band on chromosome 6 suggests QTLs for TGW (thousand grain weight), straw diameter and magnesium concentration in grain. Locus Estl on chromosome 3 was not associated with any of the quantitative traits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1991.tb00511.x
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of Mitochondrial Inhibitors on Intraerythrocytic Plasmodium falciparum in In Vitro Cultures (1986)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 33 (1986), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Malarial parasites infecting mammalian hosts are considered to be homolactate fermentors at their asexual intraerythrocytic developmental stage; however, existing ultrastructural and biochemical evidence suggest that their acristate mitochondria could be involved in energy metabolism. In the present study, inhibitors of mitochondrial function including compounds which act on NADH and succinate dehydrogenases, electron transport and mitochondrial ATPase, as well as uncouplers, were found to inhibit the growth and propagation of the human parasite Plasmodium falciparum in in vitro cultures at concentrations that specifically affect mitochondrial functions. Direct measurement of parasite protein and nucleic acid synthesis in synchronized cultures showed that throughout the parasite life cycle both processes were inhibited, the latter process being more sensitive. These results strongly suggest that intraerythrocytic malarial parasites require mitochondrial energy production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1986.tb05570.x
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  • 7
    Electronic Resource
    Electronic Resource
    The Mitochondrion of Plasmodium falciparum Visualized by Rhodamine 123 Fluorescence (1985)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 32 (1985), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Rhodamine 123 (Rh 123) has been used to probe the functional status of the mitochondrion present within the asexual, intraerythrocytic stages of the malarial parasite Plasmodium falciparum. This cationic fluorescent dye accumulates specifically in negatively charged cellular compartments, such as mitochondria. Using epifluorescence microscopy the development of what appears to be a single mitochondrion has been followed through the intraerythrocytic cycle. Mitochondrial development progresses from a fine thread-like organelle that becomes longer and eventually branched. Each daughter merozoite receives a branch or piece of the parent organelle. Cytoplasmic Rh 123 accumulation was also observed, indicating that there exists a transmembrane potential across the outer plasma and parasitophorous vacuolar membranes of the parasite. The effects of uncouplers (protonophores), ionophores, and inhibitors were examined by monitoring Rh 123 accumulation and retention. Our results demonstrate that the mitochondrion of P. falciparum actively maintains a high transmembrane potential, the function of which is as yet undefined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1985.tb04041.x
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  • 8
    Electronic Resource
    Electronic Resource
    Quantitative trait loci for scald resistance in barley localized by a non-interval mapping procedure (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 121 (2002), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Three quantitative trait loci (QTL) for scald resistance in barley were identified and mapped in relation to molecular markers using a population of chromosome doubled-haploid lines produced from the F1 generation of a cross between the spring barley varieties ‘Alexis’ and ‘Regatta’. Two field experiments were conducted in Denmark and two in Norway to assess disease resistance. The percentage leaf area covered with scald (Rhynchosporium secalis) ranged from 0 to 40% in the 189 doubled-haploid (DH) lines analysed. One quantitative trait locus was localized in the centromeric region of chromosome 3H, Qryn3, using the MAPQTL program. MAPQTL was unable to provide proper localization of the other two resistance genes and so a non-interval QTL mapping method was used. One was found to be located distally to markers on chromosome 4H (Qryn4) and the other, Qryn6, was located distally to markers on chromosome 6H. The effects of differences between the Qryn3, Qryn4 and Qryn6 alleles in two barley genotypes for the QTL were estimated to be 8.8%, 7.3% and 7.0%, respectively, of leaf covered by scald. No interactions between the QTLs were found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2002.00685.x
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  • 9
    Electronic Resource
    Electronic Resource
    Reaction of European spring barley varieties to a population of the net blotch fungus (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 119 (2000), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: About 320 European spring barley varieties and about 40 spring barley lines were tested in the field for reaction to a local population of the spot form of the net blotch fungus Pyrenophora teres forma maculata with the imperfect stage Drechslera teres. The European barley varieties showed a wide range of disease reactions, from nearly resistant to very susceptible. At least three groups of genetically related barley varieties could be distinguished: (0)‘Agneta’ and ‘Clermont’, (2)‘Nordal’ and ‘Arve’, and (3)‘Tellus’,‘Pamina’, ‘Albert’ and ‘Birka’. The parentages of these three groups of barley are mutually distantly related and may thus constitute three different sources of resistance to the pathogen population used. The range of disease reaction is similar in varieties from different European countries but it differs among different breeding stations. The relatively high level of resistance is fairly uniformly distributed in contemporary barley varieties all over most of Western Europe. Over time, from about 1830-1982, the average level of resistance varied around 4.0 (scale value) (from 2.8 to 4.8). However, since about 1940 the variation in disease reaction has become much wider (from 108 to 6.9) for unknown reason(s).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2000.00455.x
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  • 10
    Electronic Resource
    Electronic Resource
    Localization of a resistance gene and identification of sources of resistance to barley leaf stripe (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 116 (1997), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In order to determine more precisely the location of the barley leaf stripe gene, called the ‘Vada-resistance gene’, on barley chromosome 2, 63 chromosome-doubled barley lines were tested. Using data on known chromosome 2 genetic markers, the ‘Vada-resistance gene’ was estimated to be located between the markers MSU21 and Xris45b, and at a distance of about 20% recombination from the powdery mildew resistance gene MILa. We suggest that the ‘Vada-resistance gene’ is designated Rdg1a and that all former leaf stripe resistance gene designations should be rejected.To identify possible new sources of resistance, 11 barley cultivars/lines known to possess leaf stripe resistance and originating from different parts of the world, were tested with one Danish and two Syrian isolates of the leaf stripe fungus. Three apparently genetically different sources of race-specific resistance were found. The ‘Vada-resistance’ in the cultivar ‘Golf was effective against seven out of eight isolates’ populations of the leaf stripe fungus differing in geographical origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1997.tb01030.x
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