caa a22 4500 605514046 CHVBK 20210128100703.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00360-015-0912-x doi (NATIONALLICENCE)springer-10.1007/s00360-015-0912-x Adaptive considerations of temperature dependence of neuromuscular function in two species of summer- and winter-caught Crab ( Carcinus maenas and Cancer pagurus ) [Elektronische Daten] [D. Hyde, T. Pearson, S. Qari, K. Bowler] The aim of this study was to determine seasonal differences in the temperature dependence of neuromuscular parameters of the dactylopodite walking leg closer muscle in two species of freshly caught summer and winter decapod crabs. The relatively stenothermal Cancer pagurus (Cp) and eurythermal Carcinus maenas (Cm) muscle resting potential (RP) hyperpolarised significantly with increasing experimental temperature. The muscle RP in Cm was seasonally dependent at acute temperatures above 20°C whereas in Cp no seasonal effect was observed. The latent period of the muscle excitatory junction potential (EJP) following tonic motor nerve stimulation was significantly longer in winter-caught crabs in both species, although the effect was significantly more marked in Cp than Cm. Summer-caught Cp had larger excitatory junction potentials (EJPs) than did winter-caught crabs, a seasonal effect not seen in Cm. In contrast, marked seasonal differences were found in the EJP decay time constant in Cm having significantly longer time constants in winter-caught crabs, where no seasonal difference was found in Cp. These results suggest that different seasonal effects of neuromuscular parameters between Cm and Cp may reflect different strategies of response to their different seasonal temperature environments. Springer-Verlag Berlin Heidelberg, 2015 Crab nationallicence Season nationallicence Acclimatization nationallicence Cm : Carcinus maenas nationallicence Cp : Cancer pagurus nationallicence RP : Resting potential nationallicence EJP : Excitatory junction potential nationallicence Tau (τ) : Excitatory junction potential decay time constant nationallicence Hyde D. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut Pearson T. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut Qari S. Department of Biological Sciences, University of King Abdul-aziz, Jeddah, Saudi Arabia aut Bowler K. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut Journal of Comparative Physiology B Springer Berlin Heidelberg 185/6(2015-08-01), 629-636 0174-1578 185:6<629 2015 185 360 https://doi.org/10.1007/s00360-015-0912-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00360-015-0912-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hyde D. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Pearson T. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Qari S. Department of Biological Sciences, University of King Abdul-aziz, Jeddah, Saudi Arabia aut NATIONALLICENCE 700 1- Bowler K. Department of Biological and Biomedical Sciences, University of Durham, South Road, DH1 3LE, Durham, UK aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer Berlin Heidelberg 185/6(2015-08-01), 629-636 0174-1578 185:6<629 2015 185 360