... responses in juvenile cuttlefish to infrasonic accelerations mimicking main aspects of the hydrodynamic signals created by predators. In the experimental set-up, animals and their surrounding water moved as a unit to minimise lateral line activation and to allow examination of the contribution by the inner...

... of the sensory system in cuttlefish in ovo . Embryos of stage 23, 25 and 30 received a tactile, chemical or visual stimulus. An increase of mantle contraction rhythm was taken to indicate a behavioral response to the stimulus. We clearly demonstrated that tactile and chemical systems are functional from stage 23...

...Jarred Yacob; Alexandra Cosima Lewis; Allyson Gosling; Debra H. J. St Hilaire; Lindsay Tesar; Michelle McRae; Nathan J. Tublitz SUMMARY The goal of this work was to identify some of the principles underlying chromatophore growth and development in the European cuttlefish, Sepia officinalis . One...

...Emma J. Kelman; Daniel Osorio; Roland J. Baddeley SUMMARY Cuttlefishes of the genus Sepia produce adaptive camouflage by regulating the expression of visual features such as spots and lines, and textures including stipples and stripes. They produce the appropriate pattern for a given environment...

...Tsyr-Huei Chiou; Lydia M. Mäthger; Roger T. Hanlon; Thomas W. Cronin SUMMARY On every arm of cuttlefish and squid there is a stripe of high-reflectance iridophores that reflects highly polarized light. Since cephalopods possess polarization vision, it has been hypothesized that these polarized...

... such as checkerboards to investigate some specific visual cues that elicit the various camouflaged patterns in cuttlefish. In this study, we took information from experiments on artificial substrates and assembled a natural rock substrate (fixed with glue) with those features that are thought to elicit disruptive...

... of cuttlefish exposed to sudden visual stimuli. Simultaneously, we recorded cuttlefish behaviour using an overhead video camera. Upon presentation of the sudden visual stimulus (rapidly approaching bird cut-out), cuttlefish rapidly changed the colour and the texture of their skin, taking on characteristics...

... and the hearts) in returning the blood of cuttlefish to its hearts. Ultrasound provided the first non-invasive observations of vascular function in an unanaesthetized,free-moving cephalopod. The large veins (anterior vena cava, lateral venae cavae and efferent branchial vessels) contracted in live, intact...

...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...

...Michelle R. Gaston; Nathan J. Tublitz SUMMARY Body patterning behavior in unshelled cephalopod molluscs such as squid,octopuses, and cuttlefish is the ability of these animals to create complex patterns on their skin. This behavior is generated primarily by chromatophores, pigment-containing organs...

...Chuan-Chin Chiao; Roger T. Hanlon SUMMARY We investigated some visual background features that influence young cuttlefish, Sepia pharaonis , to change their skin patterning from ‘general resemblance’ of the substratum to disruptive coloration that breaks up their body form. Using computer-generated...

...N. A. Curtin; R. C. Woledge; Q. Bone ABSTRACT The passive elastic properties of the mantle of the cuttlefish Sepia officinalis have been characterized in experiments on intact mantle and on pieces cut from the mantle. The mantle was found to be very compliant over a wide range of circumferential...

...Frank Schaeffel; Christopher J. Murphy; Howard C. Howland ABSTRACT We have studied natural accommodation in the eye of six specimens of cuttlefish ( Sepia officinalis ) as they were fed with fish and shrimp. Using infrared photoretinoscopy, we observed (1) that the resting refractive state...

... of the cuttlefish Sepia officinalis (L.) (Sub-class Coleoidea, Order Sepiida) is presented, together with an analysis of the structure of the gene. A proline-rich C terminus is present; this structure is characteristic of cephalopod rhodopsins. In common with all invertebrate opsins studied so far, the equivalent...

...C. M. Rogers; L. Nelson; B. J. Milligan; E. R. Brown ABSTRACT Excitation–contraction (EC) coupling was studied in central zone mantle muscle fibres of a squid ( Alloteuthis subulata ), a cuttlefish ( Sepia officinalis ) and an octopod ( Eledone cirrhosa ). Thin slices of muscle were used for twitch...

...Brian J. Milligan; N. A. Curtin; Quentin Bone ABSTRACT The mechanical properties of obliquely striated muscle fibres were investigated using thin slices of mantle from squid Alloteuthis subulata and cuttlefish Sepia officinalis . Brief tetani or twitch stimuli were used as this pattern is likely...

...Poh Kheng Loi; Nathan Tublitz ABSTRACT The display of complex color patterns of the cuttlefish Sepia officinalis is under the regulation of the FMRFamide-related peptide (FaRP) family, but their exact identities are unknown. We report the isolation and characterization of a full-length FaRP cDNA...

.... This sensitivity arises from the orthogonal orientation of neighboring photoreceptors. Electron microscopical examination of the retina of the cuttlefish Sepia officinalis L. revealed the same orthogonal structure, suggesting that cuttlefish are also sensitive to linearly polarized light. Viewing cuttlefish...

... in the European cuttlefish Sepia officinalis are also regulated by the FMRFamide family of neuropeptides. Using an in vitro chromatophore bioassay, it has been determined that several FMRFamide-related peptides (FaRPs) are potent excitors of the chromatophore muscles, causing chromatophore expansion...

...Graham P. Ferguson; John B. Messenger; Bernd U. Budelmann ABSTRACT Rotation (roll or pitch) of a cuttlefish away from its normal orientation produces countershading reflexes (CSRs) that consist of chromatophore expansion on the ventral body surface. When rotation is in the roll plane, the CSR has...