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  • 1
    Electronic Resource
    Electronic Resource
    Muscle esterase variation and size variation in the sand launce Ammodytes dubius (1985)
    Springer
    Marine biology 87 (1985), S. 279-283 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Esterase variation detected in homogenates of muscle tissue taken from the sand launce Ammodytes dubius in April, 1970 and 1971 is described. Eight alleles were found segregating at a single locus, and the frequencies of these alleles were homogenous in population samples taken on the Emerald Bank, off Nova Scotia, Canada, in successive years. When ordered by their electrophoretic mobility, the profile of the frequencies of these alleles was unimodal and symmetric. In both of the population samples, there were significant excesses of homozygotes and deficencies of heterozygotes. There was an association between genotype and size of individuals among homozygous genotypes; individual homozygous for the most common, intermediately-migrating allele were larger than homozygotes bearing alleles with relatively fast or slow mobilities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397806
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Prevalence and Morphology of Eimeria gadi (Fiebiger, 1913) in the Haddock (1976)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 23 (1976), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The coccidian parasite Eimeria gadi was found in the haddock, Melanogrammus aeglefinus, taken from the Nova Scotian fishing banks. The haddock infection rates ranged from a high of 58% on Emerald Bank to a low of 4% on Georges Bank, the average being 32%. There was no relationship between sex and degree or prevalence of infection. Although the probability of an occurrence of infection increased with size, small fish with heavy infections were observed. The degree of infection had no apparent effect on the condition factor (length/weight) of the fish. The infection rate reached a maximum in the fall of the year while the heaviest infections were observed in the spring. It is evident from the data that the infection is fatal.The parasite mass, appearing as a creamy viscous to a yellow semisolid material in the swimbladder, consisted of various parasite stages, fibrous and cellular debris, and lipid material. Some aspects of the sporocyst stage are described.No other gadoids from the Nova Scotian banks were found to be infected; however, a single specimen of the fourbeard rockling, Enchelyopus cimbrius, from St. John's, Newfoundland, was found to be heavily infected with E. gadi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1976.tb03842.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on relations of bacteria with skin surface of Carassius auratus L. and Poeciloia reticulata (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 27 (1985), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Inocula taken from body surfaces of goldfish and guppy indicated the presence of a variety of aquatic bacteria. However, bacteria were not seen when skin samples were studied by means of histology and scanning electron microscopy. Skin from the body flank was essentially a barren field of Malpighian cell surfaces, interrupted occasionally by goblet cell secretions. Under experimental conditions, Aeromonas hydrophila (Gram-negative, motile rod) attached in large numbers to the dermal surface of artificially made wounds in goldfish, but none was found on adjacent Malpighian cells. Freshly collected skin secretions from goldfish did not influence survival or growth of A. hydrophila in vitro. The study concludes that, under normal conditions, cuticle overlying the Malpighian cells prevents firm attachment and colonization of the skin by aquatic bacteria. It is argued that bacteria isolated by microbiological studies were simply in suspension near the body surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1985.tb03188.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Clearance of arsenic ingested by man from arsenic contaminated fish (1979)
    Springer
    Bulletin of environmental contamination and toxicology 22 (1979), S. 224-229 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02026934
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Multiple forms of lactate dehydrogenase in the cod, Gadus morhua L. (1969)
    Springer
    Biochemical genetics 3 (1969), S. 317-334 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Five types of subunits are postulated to explain the lactate dehydrogenase zymogram patterns of cod tissues. The subunits designated A, B, and C occur predominantly in white skeletal muscle, heart, and liver tissues, respectively. The D subunit is found almost exclusively in the retina. Activity of the E subunit is found in most tissues but does not appear to be predominant in any one tissue. The A subunits are most susceptible to heat treatment. The B subunits are the least reactive when AcPyAD, an NAD analogue, is used in place of NAD. Subbands may be produced in incubating heart or muscle extracts with pyloric caeca extract or with trypsin or chymotrypsin. Subbands normally appearing in tissues zymograms may represent partially synthesized or partially degraded active LDH tetramers normally present in a metabolizing tissue. In a sampling of three Canadian and one European cod populations, four forms of the heart subunit were found. They are designated B, B′, B″, and B‴. Allele frequencies of the heart types for each population sample are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00485716
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    Paper (German National Licenses)
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