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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...
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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...
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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...
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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...
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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...
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Article
Endurance exercise training in the fast and slow muscles of a teleost fish (Pollachius virens)
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The recruitment of muscle fibre types has been investigated in the coalfish (Pollachius virens) using electro...
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Article
Limitations in the use of actomyosin threads as model contractile systems
Recent studies have suggested that actomyosin threads may provide a useful model for studying the properties of contractile systems1–3. The development of highly sensitive positional feedback transducers has enab...
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Article
Fine structure and metabolism of multiply innervated fast muscle fibres in teleost fish
Both the fast and slow muscle fibres of advanced teleost fish are multiply innervated. The fraction of slow-fibre volume occupied by mitochondria is 31.3%, 25.5% and 24.6%, respectively, for the myotomal muscl...
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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...
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Article
Capillarisation, oxygen diffusion distances and mitochondrial content of carp muscles following acclimation to summer and winter temperatures
Many species of fish show a partial or complete thermal compensation of metabolic rate on acclimation from summer to winter temperatures. In the present study Crucian carp (Carassius carassius L.) were acclimated...
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Article
Effect of electrical stimulation and exercise on the phosphorylation state of myosin light chains from fish skeletal muscle
This paper investigates the phosphorylation of fish muscle myosin following electrical stimulation and exercise. Purified myosin isolated from the fast myotomal muscle of rainbow trout (Salmo gairdneri) shows thr...
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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...
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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,
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Article
Capillarization, mitochondrial densities, oxygen diffusion distances and innervation of red and white muscle of the lizard Dipsosaurus dorsalis
The white and red regions of the iliofibularis muscle of the lizard Dipsosaurus dorsalis were analyzed using histologic and morphometric analysis. These regions are composed of fast glycolytic (FG) and both fast ...
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Article
Changes in tension generation and ATPase activity in skinned muscle fibres of the carp following temperature acclimation
Common carp (Cyprinus carpio L.) were acclimated to either 7°C or 23°C for 1–2 months. Skinned fibre preparations were isolated from the white myotomal muscle, and ATPase activity measured during maximal isometri...
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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...
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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...
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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...
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Chapter
Phenotypic plasticity of fish muscle to temperature change
The swimming performance of teleost fish is highly dependent on temperature. Natural selection has acted to adjust locomotory performance to particular thermal environments involving selective changes at the l...
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Chapter
Genes regulating the growth of myotomal muscle in teleost fish
Postembryonic muscle growth in fish differs from that in mammals in that new muscle fibres continue to be produced throughout much of the life cycle. Growth involves the proliferation of a population of myogen...
