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Keywords: octopus
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Journal Articles
J Exp Biol (2022) 225 (6): jeb243163.
Published: 24 March 2022
...Letizia Zullo; Alessio Di Clemente; Federica Maiole ABSTRACT Octopus arms are highly flexible structures capable of complex motions and are used in a wide repertoire of behaviors. Movements are generated by the coordinated summation of innervation signals to packed arrays of muscles oriented...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (7): 1069–1076.
Published: 1 April 2015
... reaching movements and 382 fetching movements were observed. Fig. 1. Picture sequence of typical straight reaching and fetching movements of octopus arms in a constrained situation. Octopuses are behind a Perspex wall and reach or fetch through a hole with a single arm (indicated in red...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (9): 1430–1436.
Published: 1 May 2014
... partial pressure ( P O 2 ) and pH gradients to test the setup. Oxygen binding parameters derived from measurements in only 15 μl of haemolymph from the cephalopod Octopus vulgaris showed low instrumental error (0.93%) and good agreement with published data. Broad-range spectra, each resolving 2048 data...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (22): 3727–3731.
Published: 15 November 2011
.... , Dario P. ( 2009 ). Design of a biomimetic robotic octopus arm . Bioinspir. Biomim. 4 , 015006 . Mather J. A. ( 1998 ). How do octopuses use their arms? J. Comp. Psychol. 112 , 306 - 316 . Messenger J. B. , Nixon M. , Ryan K. P. ( 1985 ). Magnesium...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2011) 214 (16): 2799–2807.
Published: 15 August 2011
...Jayson Semmens; Zoë Doubleday; Kate Hoyle; Gretta Pecl SUMMARY Many aspects of octopus growth dynamics are poorly understood, particularly in relation to sub-adult or adult growth, muscle fibre dynamics and repro-somatic investment. The growth of 5 month old Octopus pallidus cultured...
Journal Articles
J Exp Biol (2011) 214 (13): 2164–2174.
Published: 1 July 2011
... or the surrounding lipid environment, or synergistic changes to both. To assess the contribution of the enzyme itself, we cloned orthologous Na + /K + -ATPase α-subunits from an Antarctic ( Pareledone sp.; –1.8°C) and a temperate octopus ( Octopus bimaculatus ; ∼18°C), and compared their turnover rates...
Includes: Supplementary data
Journal Articles
J Exp Biol (2005) 208 (2): 261–265.
Published: 15 January 2005
...R. H. Douglas; R. Williamson; H.-J. Wagner SUMMARY This paper provides the first detailed description of the time courses of light-evoked pupillary constriction for two species of cephalopods, Sepia officinalis (a cuttlefish) and Eledone cirrhosa (an octopus). The responses are much faster than...
Journal Articles
J Exp Biol (1990) 152 (1): 471–484.
Published: 1 September 1990
.... J. , Duthie , G. G. , Houlihan , D. F. , Smith , P. J. S. and Wells , J. ( 1987 ). Blood flow and pressure changes in exercising octopuses (Octopus vulgaris) . J. exp. Biol . 131 , 175 – 187 . 10.1242/jeb.131.1.175 Wells , M. J. and Smith , P. J. S...
Journal Articles
J Exp Biol (1990) 152 (1): 583–585.
Published: 1 September 1990
...M. J. Wells; J. Wells ABSTRACT In a recent paper ( Wells and Wells, 1989 ) evidence was presented indicating that Octopus vulgaris takes up water and salts through the digestive gland appendages, the so-called ‘pancreas’. Animals with the digestive gland ducts ligated lost weight at around 11...
Journal Articles
J Exp Biol (1989) 142 (1): 461–464.
Published: 1 March 1989
...W. R. A. Muntz; J. Gwyther ABSTRACT A recent study has shown that the minimum separable angle of visual acuity of Octopus pallidus and O. australis lies between 4·4′ and 9·7′ when vertical and horizontal gratings are used as test objects ( Muntz & Gwyther, 1988 ). In view of other observations...
Journal Articles
J Exp Biol (1988) 140 (1): 345–353.
Published: 1 November 1988
...W. R. A. Muntz; J. Gwyther ABSTRACT If two stimuli are presented to an octopus simultaneously, but at different distances from the animal, the nearer of the two is usually attacked. This preference was used to test the ability of octopuses to discriminate distance. White discs, 37 mm in diameter...
Journal Articles
J Exp Biol (1988) 134 (1): 119–129.
Published: 1 January 1988
... will be considered further in the Discussion. The present experiments were done for two purposes: (1) to develop behavioural methods suitable for studying vision in Australian octopuses; and (2) to measure visual acuity in Octopus as an initial contribution to the study of basic visual mechanisms...
Journal Articles
J Exp Biol (1988) 134 (1): 451–454.
Published: 1 January 1988
... behavioural experiments indicate no reaction to sound by cephalopods ( Hubbard, 1960 ), although this is contradicted by other observations ( Maniwa, 1976 ). 12 08 1987 © 1988 by Company of Biologists 1988 statocyst octopus vibration sensitivity The statocyst in octopus has been...
Journal Articles
J Exp Biol (1987) 131 (1): 137–157.
Published: 1 September 1987
...D. F. Houlihan; C. Agnisola; N. M. Hamilton; I. Trara Genoino ABSTRACT A technique is described which allowed the measurement of the oxygen consumption of the isolated heart of Octopus vulgaris . Contraction of the heart resulted in an aortic output and a flow through the heart muscle into coronary...
Journal Articles
J Exp Biol (1987) 131 (1): 175–187.
Published: 1 September 1987
... and the basic body plan of a mollusc are discussed, and the situation in squid is compared with that in octopuses. 20 05 1987 © 1987 by Company of Biologists 1987 Octopus exercise blood flow blood pressure Most cephalopods are large by invertebrate standards, and some are large...
Journal Articles
J Exp Biol (1987) 130 (1): 87–106.
Published: 1 July 1987
...Robert E. Shadwick; John M. Gosline; William K. Milsom ABSTRACT Simultaneous measurements of blood pressure and blood flow were made in the dorsal aorta of the cephalopod Octopus dofleini Wülker. In resting animals the heart rate varied from 8 ·5 to 14 beatsmin −1 , while aortic pressure typically...
Journal Articles
J Exp Biol (1985) 119 (1): 251–264.
Published: 1 November 1985
... octopuses, Octopus vulgaris , within the size range 80–300 g, were used in these experiments. The animals were obtained from the Gulf of Naples and maintained in a closed seawater system in Regensburg until used for experiment. The recording arrangement was similar to that already described...
Journal Articles
J Exp Biol (1985) 118 (1): 445–448.
Published: 1 September 1985
...M. J. Wells; J. Wells 25 3 1985 © 1985 by Company of Biologists 1985 Ventilation hypoxia Octopus Octopus can regulate its oxygen uptake down to a of 70 mmHg, and in some instances well beyond this ( Borer & Lane, 1971 ; Maginnis & Wells, 1969 ; Wells...
Journal Articles
J Exp Biol (1985) 117 (1): 415–431.
Published: 1 July 1985
...F. Dubas; P. R. Boyle ABSTRACT Innervation of chromatophore muscles of the octopus Eledone cirrhosa was investigated by stimulating nerve bundles in the skin with a suction electrode and monitoring chromatophore movements with a photo-cell or a video camera. Attention was focused...
Journal Articles
J Exp Biol (1985) 117 (1): 475–479.
Published: 1 July 1985
... blood gas parameters and pH in fish ( Belaud, Trotter & Peyraud, 1979 ; Thomas & Le Ruz, 1982 ). The present study attempts to apply a similar technique to an invertebrate, Octopus vulgaris . * Present address: Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2...