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  1. Article

    Open Access

    Phasing of muscle gene expression with fasting-induced recovery growth in Atlantic salmon

    Many fish species experience long periods of fasting in nature often associated with seasonal reductions in water temperature and prey availability or spawning migrations. During periods of nutrient restrictio...

    Neil I Bower, Richard G Taylor, Ian A Johnston in Frontiers in Zoology (2009)

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    Article

    Temperature acclimation and the expression of contractile protein isoforms in the skeletal muscles of the common carp (Cyprinus carpio L.)

    Common carp (Cyprinus carpio L.) were acclimated to either 2, 5, 8, 11, 15, 20, or 23°C for 12 weeks (12 h light: 12 h dark). Fish did not feed after 6 weeks at temperatures below 8°C. Skinned fibres were prepare...

    Tony Crockford, Ian A. Johnston in Journal of Comparative Physiology B (1990)

  3. No Access

    Article

    Influence of pH and temperature on force development and shortening velocity in skinned muscle fibres from fish

    Three species of fish were studied: Atlantic cod (Gadus morhua), sculpin (Myoxocephalus scorpius) (from the North Sea, temperature 2 to 12°C) andNotothenia neglecta (from Antarctica, temperature −2 to +2°C). Sing...

    Gabriel Mutungi, Ian A. Johnston in Fish Physiology and Biochemistry (1988)

  4. No Access

    Article

    Morphometrics and ultrastructure of myocardial tissue in Notothenioid fishes

    Antarctic fish of the family Channichthyidae (Icefishes) lack the respiratory pigments haemoglobin and myoglobin. The morphometrics and ultrastructure of the ventricular myocardium of a benthic icefish,Chaenoceph...

    Ian A. Johnston, Paul Harrison in Fish Physiology and Biochemistry (1987)

  5. No Access

    Article

    Thermal dependence of contractile properties of single skinned muscle fibres from Antarctic and various warm water marine fishes including Skipjack Tuna (Katsuwonus pelamis) and Kawakawa (Euthynnus affinis)

    Single fast fibres and small bundles of slow fibres were isolated from the trunk muscles of an Antarctic (Notothenia neglecta) and various warm water marine fishes (Blue Crevally,Carangus melampygus; Grey Mullet,

    Ian A. Johnston, Richard Brill in Journal of Comparative Physiology B (1984)

  6. No Access

    Article

    The eurythermal myofibrillar protein complex of the mummichog (Fundulus heteroclitus): adaptation to a fluctuating thermal enviroment

    Mummichogs from salt marshes of the Atlantic coast of Maine (USA) experience a mean seasonal temperature range of −1 °C to +15 °C. However, during summer tidal cycles they may experience rapid temperature chan...

    Bruce D. Sidell, Ian A. Johnston, Timothy S. Moerland… in Journal of comparative physiology (1983)

  7. No Access

    Article

    Energy metabolism of fast- and slow-twitch skeletal muscle in the rat: Thyroid hormone induced changes

    Male Wistar rats were made hypothyroid or hyperthyroid over a period of six weeks, by administration of carbimazole or triiodothyronine (T3). Serial frozen sections of soleus and extensor digitorum longus (EDL) m...

    Colin J. M. Nicol, Ian A. Johnston in Journal of comparative physiology (1981)

  8. No Access

    Article

    Evolutionary temperature adaptation of fish sarcoplasmic reticulum

    Sarcoplasmic reticulum has been isolated from the white muscle of 15 species of teleost fish adapted to diverse thermal environments. Evidence has been obtained that the Ca2+-dependent ATPase of fish sarcoplasmic...

    Harry J. McArdle, Ian A. Johnston in Journal of comparative physiology (1980)

  9. No Access

    Article

    Endurance exercise training in the fast and slow muscles of a teleost fish (Pollachius virens)

    1. The recruitment of muscle fibre types has been investigated in the coalfish (Pollachius virens) using electro...

    Ian A. Johnston, Thomas W. Moon in Journal of comparative physiology (1980)

  10. No Access

    Article

    Starvation and the activities of glycolytic and gluconeogenic enzymes in skeletal muscles and liver of the plaice,Pleuronectes platessa

    Changes in body index parameters and liver, red muscle and white muscle enzyme profiles have been determined in fed and four month starved plaice,Pleuronectes platessa. The results are compared to other vertebrat...

    Thomas W. Moon, Ian A. Johnston in Journal of comparative physiology (1980)

  11. No Access

    Article

    Calcium regulatory proteins and temperature acclimation of actomyosin ATPase from a eurythermal teleost (Carassius auratus L.)

    Goldfish (Carassius auratus) were acclimated for 5 months at temperatures of either 2°C or 31°C. Natural actomyosin was prepared from white myotomal muscle and its Mg2+Ca2+ ATPase activity determined. Temperature...

    Ian A. Johnston in Journal of comparative physiology (1979)

  12. No Access

    Article

    Evolutionary temperature adaptation and the calcium regulation of fish actomyosin ATPases

    Actomyosins have been isolated from the white skeletal muscles of fish inhabiting thermal environments with characteristically low seasonal temperature variations for example, Antarctica, arctic rivers and the...

    Ian A. Johnston, N. J. Walesby in Journal of comparative physiology (1979)

  13. No Access

    Article

    Molecular mechanisms of temperature adaptation in fish myofibrillar adenosine triphosphatases

    Studies have been carried out on the Mg2+ Ca2+-myofibrillar ATPase from the muscles of fish adapted to different environmental temperatures. The thermal stability of the ATPase is strongly correlated with mean ha...

    Ian A. Johnston, N. J. Walesby in Journal of comparative physiology (1977)