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  • 1
    Electronic Resource
    Electronic Resource
    Seasonal changes in thyroidal status in the plaice, Pleuronectes platessa L. (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 12 (1978), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A chemically specific analysis for plasma thyroid hormones has been used to disclose a seasonal bimodality in the concentrations of thyroxine (T4) and triiodothyronine (T3) in the plaice; maxima in both hormone levels occur in winter and in summer. The ratio of T4 concentrations to T3 varies seasonally being at a minimum in summer. A highly significant correlation of T4 plasma levels with the landings per unit fishing effort for the same area has been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1978.tb04197.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Seasonal and diurnal rhythms of thyroidal status in the rainbow trout, Salmo gairdneri Richardson (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 12 (1978), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The concentrations of thyroxine (T4) and triiodothyronine (T3) in the blood plasma of rainbow trout (Salmo gairdneri Richardson) at intervals throughout the year have been measured by a chemically specific gas-liquid chromatographic (GLC) method. Mean hormone levels showed a seasonal variation, maximal levels of both hormones occurring in winter and minimal concentrations in mid summer. An apparent secondary maximum in mean T4 and T3 concentrations was observed in spring. (T4)/(T3) ratios have been found to be highest in winter and lowest in summer. A radioimmunoassay procedure, validated by GLC analyses, revealed the presence of a diurnal rhythm in serum T4 levels of trout sampled in September and in April.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1978.tb04199.x
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    Paper (German National Licenses)
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