Academic literature on the topic 'Photoreceptor behaviour'

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Journal articles on the topic "Photoreceptor behaviour"

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Sumner-Rooney, Lauren, Imran A. Rahman, Julia D. Sigwart, and Esther Ullrich-Lüter. "Whole-body photoreceptor networks are independent of ‘lenses’ in brittle stars." Proceedings of the Royal Society B: Biological Sciences 285, no. 1871 (2018): 20172590. http://dx.doi.org/10.1098/rspb.2017.2590.

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Photoreception and vision are fundamental aspects of animal sensory biology and ecology, but important gaps remain in our understanding of these processes in many species. The colour-changing brittle star Ophiocoma wendtii is iconic in vision research, speculatively possessing a unique whole-body visual system that incorporates information from nerve bundles underlying thousands of crystalline ‘microlenses’. The hypothesis that these might form a sophisticated compound eye-like system regulated by chromatophores has been extensively reiterated, with investigations into biomimetic optics and si
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Peirson, Stuart N., Stephanie Halford, and Russell G. Foster. "The evolution of irradiance detection: melanopsin and the non-visual opsins." Philosophical Transactions of the Royal Society B: Biological Sciences 364, no. 1531 (2009): 2849–65. http://dx.doi.org/10.1098/rstb.2009.0050.

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Circadian rhythms are endogenous 24 h cycles that persist in the absence of external time cues. These rhythms provide an internal representation of day length and optimize physiology and behaviour to the varying demands of the solar cycle. These clocks require daily adjustment to local time and the primary time cue (zeitgeber) used by most vertebrates is the daily change in the amount of environmental light (irradiance) at dawn and dusk, a process termed photoentrainment. Attempts to understand the photoreceptor mechanisms mediating non-image-forming responses to light, such as photoentrainmen
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Insinna, E. M. "The Phototactic Sensorimotor Mechanism of the Unicellular Alga Euglena Gracilis. An Application to the Evolutionary Study of Vision." Perception 26, no. 1_suppl (1997): 187. http://dx.doi.org/10.1068/v970287.

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Our understanding of even basic functions of microtubules (MT) such as intracellular transport and ciliary beating, including their role in sensory cells and nerve cells, is still incomplete. For example, vertebrate photoreceptors contain a cilium whose possible dynamical function is still unknown. A new model of microtubular dynamics, developed by me together with P Zaborski and J Tuszynski [Insinna et al, 1996 BioSystems39(3) 187 – 226], is capable of accounting for most of the phenomena associated with cell motility. Additionally, it sheds new light not only on the phototactic behaviour of
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Clark, R. C., R. D. Santer, and J. S. Brebner. "A generalized equation for the calculation of receptor noise limited colour distances in n -chromatic visual systems." Royal Society Open Science 4, no. 9 (2017): 170712. http://dx.doi.org/10.1098/rsos.170712.

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Researchers must assess similarities and differences in colour from an animal's eye view when investigating hypotheses in ecology, evolution and behaviour. Nervous systems generate colour perceptions by comparing the responses of different spectral classes of photoreceptor through colour opponent mechanisms, and the performance of these mechanisms is limited by photoreceptor noise. Accordingly, the receptor noise limited (RNL) colour distance model of Vorobyev and Osorio (Vorobyev & Osorio 1998 Proc. R. Soc. Lond. B 265 , 351–358 ( doi:10.1098/rspb.1998.0302 )) generates predictions about
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Nilsson, Dan-Eric. "The evolution of eyes and visually guided behaviour." Philosophical Transactions of the Royal Society B: Biological Sciences 364, no. 1531 (2009): 2833–47. http://dx.doi.org/10.1098/rstb.2009.0083.

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The morphology and molecular mechanisms of animal photoreceptor cells and eyes reveal a complex pattern of duplications and co-option of genetic modules, leading to a number of different light-sensitive systems that share many components, in which clear-cut homologies are rare. On the basis of molecular and morphological findings, I discuss the functional requirements for vision and how these have constrained the evolution of eyes. The fact that natural selection on eyes acts through the consequences of visually guided behaviour leads to a concept of task-punctuated evolution, where sensory sy
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Neal, S., D. M. de Jong, and E. C. Seaver. "CRISPR/CAS9 mutagenesis of a single r-opsin gene blocks phototaxis in a marine larva." Proceedings of the Royal Society B: Biological Sciences 286, no. 1904 (2019): 20182491. http://dx.doi.org/10.1098/rspb.2018.2491.

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Many marine animals depend upon a larval phase of their life cycle to locate suitable habitat, and larvae use light detection to influence swimming behaviour and dispersal. Light detection is mediated by the opsin genes, which encode light-sensitive transmembrane proteins. Previous studies suggest that r-opsins in the eyes mediate locomotory behaviour in marine protostomes, but few have provided direct evidence through gene mutagenesis. Larvae of the marine annelid Capitella teleta have simple eyespots and are positively phototactic, although the molecular components that mediate this behaviou
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Asano, Y., S. Nakamura, S. Ishida, K. Azuma, and T. Shinozawa. "Rhodopsin-like proteins in planarian eye and auricle: detection and functional analysis." Journal of Experimental Biology 201, no. 9 (1998): 1263–71. http://dx.doi.org/10.1242/jeb.201.9.1263.

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The presence of rhodopsin-like proteins in the eyes and auricles of the freshwater planarian Dugesia japonica was confirmed using anti-frog-rhodopsin rabbit IgG. The apparent relative molecular masses of these proteins were 65x10(3) and 62x10(3), and positive reactions to IgG were localized to the microvilli of the photoreceptor cells in the eyes and to the sensory cilia, rootlets and microvilli in the auricles. Eye- or head-excised planarians showed no negative phototaxis, whereas intact or auricle-excised planarians did. During regeneration in head-excised planarians, the appearance of rhodo
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Young, Lauriann E., Ronald E. Young, and D. A. P. Bundy. "Photoreceptor evoked potentials and phototactic behaviour in Cercaria caribbea LXXI cable." Comparative Biochemistry and Physiology Part A: Physiology 88, no. 4 (1987): 619–24. http://dx.doi.org/10.1016/0300-9629(87)90673-6.

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Honkanen, Anna, Esa-Ville Immonen, Iikka Salmela, Kyösti Heimonen, and Matti Weckström. "Insect photoreceptor adaptations to night vision." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1717 (2017): 20160077. http://dx.doi.org/10.1098/rstb.2016.0077.

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Night vision is ultimately about extracting information from a noisy visual input. Several species of nocturnal insects exhibit complex visually guided behaviour in conditions where most animals are practically blind. The compound eyes of nocturnal insects produce strong responses to single photons and process them into meaningful neural signals, which are amplified by specialized neuroanatomical structures. While a lot is known about the light responses and the anatomical structures that promote pooling of responses to increase sensitivity, there is still a dearth of knowledge on the physiolo
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NILSSON, DAN-E. "Eye evolution and its functional basis." Visual Neuroscience 30, no. 1-2 (2013): 5–20. http://dx.doi.org/10.1017/s0952523813000035.

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AbstractEye evolution is driven by the evolution of visually guided behavior. Accumulation of gradually more demanding behaviors have continuously increased the performance requirements on the photoreceptor organs. Starting with nondirectional photoreception, I argue for an evolutionary sequence continuing with directional photoreception, low-resolution vision, and finally, high-resolution vision. Calculations of the physical requirements for these four sensory tasks show that they correlate with major innovations in eye evolution and thus work as a relevant classification for a functional ana
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Dissertations / Theses on the topic "Photoreceptor behaviour"

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Hughes, Edward Howard. "Microglial behaviour during photoreceptor degeneration." Thesis, University College London (University of London), 2004. http://discovery.ucl.ac.uk/1446879/.

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Inherited photoreceptor dystrophies are a leading cause of blindness and have no effective treatment. Despite advances in our understanding of the genetic mechanisms underlying this diverse group of conditions, the sequence of events leading from genetic miscoding to photoreceptor death by apoptosis are still unknown, although influences from other cells within the retina have been implicated. Microglia, the macrophages of the central nervous system, have previously been shown to increase in number and migrate to the photoreceptor layer to phagocytose apoptotic cell debris. However increasing
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McLatchie, Linda. "Block of the cyclic GMP-activated conductance of salamander rod photoreceptors." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320405.

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Honkanen, A. (Anna). "Insect optomotor experiments in the dark using virtual reality." Doctoral thesis, University of Oulu, 2014. http://urn.fi/urn:isbn:9789526207025.

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Abstract Vision is capable of providing an animal with a wealth of information very fast. Visually guided behaviours are numerous, ranging from foraging to navigation. Vision can be quite reliable in bright light, but the signals produced by the photoreceptors become progressively more unreliable with falling light intensities. In this thesis the usefulness of a novel virtual reality-based environment for insect vision research is reviewed, and the low-light vision of the American cockroach, Periplaneta americana, is assessed using the optomotor behavioural paradigm and intracellular photorece
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"Puzzling Connections between Behavior, Spectral Photoreceptor Classes and Visual System Simplification: Branchiopod Crustaceans and Unconventional Color Vision." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.40271.

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abstract: Why do many animals possess multiple classes of photoreceptors that vary in the wavelengths of light to which they are sensitive? Multiple spectral photoreceptor classes are a requirement for true color vision. However, animals may have unconventional vision, in which multiple spectral channels broaden the range of wavelengths that can be detected, or in which they use only a subset of receptors for specific behaviors. Branchiopod crustaceans are of interest for the study of unconventional color vision because they express multiple visual pigments in their compound eyes, have a simpl
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Book chapters on the topic "Photoreceptor behaviour"

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Jacobs, Gerald H. "Photoreceptors." In Encyclopedia of Animal Cognition and Behavior. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-47829-6_620-1.

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van Diepen, Hester C., Johanna H. Meijer, Stuart N. Peirson, and Russell G. Foster. "Circadian Photoreception: From Phototransduction to Behaviour." In The Retina and Circadian Rhythms. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9613-7_3.

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Bertolucci, Cristiano, Elena Frigato, and Augusto Foà. "The Reptilian Clock System: Circadian Clock, Extraretinal Photoreception, and Clock-Dependent Celestial Compass Orientation Mechanisms in Reptiles." In Biological Timekeeping: Clocks, Rhythms and Behaviour. Springer India, 2017. http://dx.doi.org/10.1007/978-81-322-3688-7_10.

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Buskey, E. J., J. O. Peterson, and J. W. Ambler. "The Role of Photoreception in the Swarming Behavior of the Copepod Dioithona Oculata." In Zooplankton: sensory ecology and physiology. Routledge, 2021. http://dx.doi.org/10.1201/9780203733615-22.

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Pike, Alan W., and Robert Wink. "Aspects of photoreceptor structure and phototactic behavior in Platyhelminthes, with particular reference to the symbiotic turbellarian Paravortex." In Advances in the Biology of Turbellarians and Related Platyhelminthes. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4810-5_14.

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Choe, Kwang‐Min, and Thomas R. Clandinin. "Thinking about Visual Behavior; Learning about Photoreceptor Function." In Current Topics in Developmental Biology. Elsevier, 2005. http://dx.doi.org/10.1016/s0070-2153(05)69007-2.

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Cronin, Thomas W., Sönke Johnsen, N. Justin Marshall, and Eric J. Warrant. "The Eye Designs of the Animal Kingdom." In Visual Ecology. Princeton University Press, 2014. http://dx.doi.org/10.23943/princeton/9780691151847.003.0005.

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This chapter studies the eye designs of the animal kingdom. Today, there are ten generally recognized optical eye types that have evolved in various branches of the animal kingdom. Whereas vertebrates possess only one of them, invertebrates possess all ten, from simple assemblies of photoreceptors that underlie phototaxis to advanced compound and camera eyes that support a sophisticated range of visual behaviors. Some invertebrates even possess several eyes of more than one type. The chapter identifies some of these eye types in the context of sensitivity and resolution, namely, pigment-pit eyes, compound eyes, and camera eyes. The last of these are characteristic of the vertebrates, although they are also commonplace among the invertebrates. The remaining nine eye types are found only within the invertebrates.
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"The phenomenon of solar tracking is known from the early studies of Yin (1938) and that it is a blue light response, while the actual photoreceptors involved are not identified (Batschauer 1998; Briggs and Christie, 2002). In view of the fact that solar tracking behaviour results from light-driven turgor changes in the volume of the cells just as in the case of stomatal guard cells, the phototropins might be involved here also (Briggs and Christie, 2002). Sakamoto and Briggs (2002) have suggested that solar tracking may involv e phototropins. The precise molecular mechanisms concernin g the heliotropic movements are not currently known , while some knowledge is available on the mechanism of nyctinastic movements. However, Cronlund and Forseth (1995) have studied the mechanism of soybean leaflet movement and concluded that the mechanism of heliotropic movement was similar to that of nyctinastic movements. These authors have studied the role of K+ channels and the plasma membrane H/ATPase (Michelet and Boutry, 1995) in paraheliotropic movements throug h the measurements of leaf movements after treatment of pulvinus with promoters and inhibitors of HATPase and K+ channels. HATPase inhibition reduced the leaf." In Photosynthesis. CRC Press, 2004. http://dx.doi.org/10.1201/9781482294446-12.

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Conference papers on the topic "Photoreceptor behaviour"

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Voiciekhovskaja, O. V. "Plastid signals can change the "behavior" of plants through the regulation of transcription of photoreceptor genes." In IX Congress of society physiologists of plants of Russia "Plant physiology is the basis for creating plants of the future". Kazan University Press, 2019. http://dx.doi.org/10.26907/978-5-00130-204-9-2019-102.

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Reports on the topic "Photoreceptor behaviour"

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Foster, Russell G. Photoreceptors Regulating Circadian Behavior: A Mouse Model. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada264881.

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