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B. Rydqvist – One of the best experts on this subject based on the ideXlab platform.

  • Action Potential and Sodium Current in the Slowly and Rapidly Adapting Stretch Receptor Neurons of the Crayfish (astacus astacus)
    Journal of Neurophysiology, 1998
    Co-Authors: Nuhan Purali, B. Rydqvist

    Abstract:

    Purali, Nuhan and Bo Rydqvist. Action potential and sodium current in the slowly and rapidly adapting stretch receptor neurons of the crayfish (astacus astacus). J. Neurophysiol. 80: 2121–2132, 1998. Action potentials (APs) and sodium current from the slowly and the rapidly adapting stretch receptor neurons in the crayfish (astacus astacus) were recorded with a two microelectrode voltage- and current-clamp technique. In the rapidly adapting neuron the APs had a duration of 3.2 ± 0.2 ms (means ± SE) and an amplitude of 55.2 ± 1.5 mV. In the slowly adapting receptor neuron APs had a duration of 4.1 ± 0.2 ms and an amplitude 79.9 ± 2.0 mV. APs in the rapidly adapting neuron had a larger amplitude if they were recorded from the axon. In the rapidly adapting neuron adaptation of the impulse response was prolonged by hyperpolarization or by exposure to scorpion venom. Also, sinusoidal current stimulation added to the current steps prevented impulse adaptation. Block of the potassium currents in the slowly adapt…

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  • Action Potential and Sodium Current in the Slowly and Rapidly Adapting Stretch Receptor Neurons of the Crayfish (astacus astacus)
    Journal of neurophysiology, 1998
    Co-Authors: Nuhan Purali, B. Rydqvist

    Abstract:

    Purali, Nuhan and Bo Rydqvist. Action potential and sodium current in the slowly and rapidly adapting stretch receptor neurons of the crayfish (astacus astacus). J. Neurophysiol. 80: 2121–2132, 199…

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Nuhan Purali – One of the best experts on this subject based on the ideXlab platform.

  • Action Potential and Sodium Current in the Slowly and Rapidly Adapting Stretch Receptor Neurons of the Crayfish (astacus astacus)
    Journal of Neurophysiology, 1998
    Co-Authors: Nuhan Purali, B. Rydqvist

    Abstract:

    Purali, Nuhan and Bo Rydqvist. Action potential and sodium current in the slowly and rapidly adapting stretch receptor neurons of the crayfish (astacus astacus). J. Neurophysiol. 80: 2121–2132, 1998. Action potentials (APs) and sodium current from the slowly and the rapidly adapting stretch receptor neurons in the crayfish (astacus astacus) were recorded with a two microelectrode voltage- and current-clamp technique. In the rapidly adapting neuron the APs had a duration of 3.2 ± 0.2 ms (means ± SE) and an amplitude of 55.2 ± 1.5 mV. In the slowly adapting receptor neuron APs had a duration of 4.1 ± 0.2 ms and an amplitude 79.9 ± 2.0 mV. APs in the rapidly adapting neuron had a larger amplitude if they were recorded from the axon. In the rapidly adapting neuron adaptation of the impulse response was prolonged by hyperpolarization or by exposure to scorpion venom. Also, sinusoidal current stimulation added to the current steps prevented impulse adaptation. Block of the potassium currents in the slowly adapt…

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  • Action Potential and Sodium Current in the Slowly and Rapidly Adapting Stretch Receptor Neurons of the Crayfish (astacus astacus)
    Journal of neurophysiology, 1998
    Co-Authors: Nuhan Purali, B. Rydqvist

    Abstract:

    Purali, Nuhan and Bo Rydqvist. Action potential and sodium current in the slowly and rapidly adapting stretch receptor neurons of the crayfish (astacus astacus). J. Neurophysiol. 80: 2121–2132, 199…

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Rolf Gydemo – One of the best experts on this subject based on the ideXlab platform.

  • Signal crayfish, Pacifastacus leniusculus, as a vector for Psorospermium haeckeli to noble crayfish, astacus astacus.
    Aquaculture, 1996
    Co-Authors: Rolf Gydemo

    Abstract:

    Abstract As part of investigations of the ecological impact and transmission of the crayfish parasite Psorospermium haeckeli , a laboratory experiment was performed where noble crayfish, astacus astacus , and signal crayfish, Pacifastacus leniusculus , from populations in which P. haeckeli had not been detected, were fed with each other in all combinations. Noble crayfish fed noble crayfish did not acquire P. haeckeli during the experimental period of 10 months, while noble crayfish fed signal crayfish did. Signal crayfish fed noble crayfish showed a lower frequency of definitive positive infestation than signal crayfish fed signal crayfish. The results support the theory that Psorospermium haeckeli has been introduced to the Baltic island of Gotland with signal crayfish, and that signal crayfish, when not infected with the crayfish plague fungus Aphanomyces astaci , is more successful in suppressing the parasite. The investigations also showed that the technique of digesting soft tissues might be an inadequate method of observing P. haeckeli in signal crayfish.

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  • Predation on larvae of the noble crayfish, astacus astacus L.
    Aquaculture, 1990
    Co-Authors: Rolf Gydemo, Lars Westin, Anders Nissling

    Abstract:

    Abstract The predation by dragonfly larvae ( Aeschna grandis ) and adult female crayfish on second-stage young of the noble crayfish, astacus astacus , was studied in aquarium experiments. Combinations of crayfish young with and without adult female crayfish, with and without shelter were made in 4×4 set-ups with dragonfly larvae and 4×2 without. Dragonfly larvae and adult female crayfish rapidly reduced the number of surviving crayfish larvae. When neither adult crayfish females nor dragonfly larvae were present and crayfish juveniles also had access to shelter, the survival rate was high.

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