On a Giant Squid, Ommastrephes caroli Furtado, stranded at Looe, Cornwall
نویسندگان
چکیده
منابع مشابه
A Unique Advantage for Giant Eyes in Giant Squid
Giant and colossal deep-sea squid (Architeuthis and Mesonychoteuthis) have the largest eyes in the animal kingdom [1, 2], but there is no explanation for why they would need eyes that are nearly three times the diameter of those of any other extant animal. Here we develop a theory for visual detection in pelagic habitats, which predicts that such giant eyes are unlikely to evolve for detecting ...
متن کاملTransmission in Squid Giant Synapses
Synaptic transmission was studied in giant synapses of the stellate ganglion of the squid. When bathed in air-saturated sea water, the synapses deteriorate in 10 to 20 min.; if the sea water is saturated with 100 per cent oxygen, they function steadily for up to 12 hours. Optimal results probably require a medium with lower magnesium and higher calcium than the sea water used. Of eighteen compo...
متن کاملEnhanced synaptic transmission at the squid giant synapse by artificial seawater based on physically modified saline
Superfusion of the squid giant synapse with artificial seawater (ASW) based on isotonic saline containing oxygen nanobubbles (RNS60 ASW) generates an enhancement of synaptic transmission. This was determined by examining the postsynaptic response to single and repetitive presynaptic spike activation, spontaneous transmitter release, and presynaptic voltage clamp studies. In the presence of RNS6...
متن کاملAdsorption of Pb(II) and Cd(II) by Squid Ommastrephes bartrami Melanin
The adsorption of Cd(II) and Pb(II) by squid melanin was investigated. At a metal ion concentration of 2 mM/L, the biosorption efficiency of melanin reached 95% for Cd(II) and Pb(II). The maximum content of bound Cd(II) and Pb(II) was 0.93 mM/g and 0.65 mM/g, respectively. Temperature had no obvious effect on the adsorption of the metals, and in a pH range of 4.0-7.0, the adsorption yield was h...
متن کاملOn the persistent sodium current in squid giant axons.
R. F. Rakowski, D. C. Gadsby, and P. DeWeer have reported a persistent, tetrodotoxin-sensitive sodium ion current (I(NaP)) in squid giant axons having a low threshold (-90 mV) and a maximal inward amplitude of -4 microA/cm(2) at -50 mV. This report makes the case that most of I(NaP) is attributable to an ion channel mechanism distinct from the classical rapidly activating and inactivating sodiu...
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ژورنال
عنوان ژورنال: Bulletin of the British Museum (Natural History) Zoology
سال: 1950
ISSN: 0007-1498
DOI: 10.5962/p.314118