Night vision by cuttlefish enables changeable camouflage

Allen, Justine J.; Mäthger, Lydia M.; Buresch, Kendra C.; Fetchko, Thomas; Gardner, Meg; Hanlon, Roger T.

doi:10.1242/jeb.044750

Cited by 15 publications

(10 citation statements)

References 48 publications

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“…(2) Visual perception A wide range of adaptations exist throughout the animal kingdom to make use of reflected light at different levels and wavelengths, allowing the recognition of important features of the environment (Land & Nilsson, 2002;Warrant, 2004;; discoveries about the breadth of the abilities of organisms in this regard continue to be made (e.g. Kelber, Balkenius & Warrant, 2002;Grémillet et al, 2005;Allen et al, 2010;Baird et al, 2011;Hogg et al, 2011). A substantial proportion of animal species are adapted to see at light levels well below those at which human vision is effective, in which they can often see colour and navigate well (Table 3; Warrant, 2004;Warrant & Dacke, 2010.…”

Section: (1) Circadian Clocks and Photoperiodismmentioning

confidence: 99%

The ecological impacts of nighttime light pollution: a mechanistic appraisal

et al. 2013

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The ecological impacts of nighttime light pollution have been a longstanding source of concern, accentuated by realized and projected growth in electrical lighting. As human communities and lighting technologies develop, artificial light increasingly modifies natural light regimes by encroaching on dark refuges in space, in time, and across wavelengths. A wide variety of ecological implications of artificial light have been identified. However, the primary research to date is largely focused on the disruptive influence of nighttime light on higher vertebrates, and while comprehensive reviews have been compiled along taxonomic lines and within specific research domains, the subject is in need of synthesis within a common mechanistic framework. Here we propose such a framework that focuses on the cross-factoring of the ways in which artificial lighting alters natural light regimes (spatially, temporally, and spectrally), and the ways in which light influences biological systems, particularly the distinction between light as a resource and light as an information source. We review the evidence for each of the combinations of this cross-factoring. As artificial lighting alters natural patterns of light in space, time and across wavelengths, natural patterns of resource use and information flows may be disrupted, with downstream effects to the structure and function of ecosystems. This review highlights: (i) the potential influence of nighttime lighting at all levels of biological organisation (from cell to ecosystem); (ii) the significant impact that even low levels of nighttime light pollution can have; and (iii) the existence of major research gaps, particularly in terms of the impacts of light at population and ecosystem levels, identification of intensity thresholds, and the spatial extent of impacts in the vicinity of artificial lights.

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Section: (1) Circadian Clocks and Photoperiodismmentioning

confidence: 99%

The ecological impacts of nighttime light pollution: a mechanistic appraisal

et al. 2013

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“…moonlight lamp) or a specific red light illumination reduces the risk of disturbance when observation of the animal is required at night (e.g. Allen et al 2010). …”

Section: Care and Welfare Of Cephalopods: An Introductionmentioning

confidence: 99%

Cephalopods in neuroscience: regulations, research and the 3Rs

et al. 2014

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Cephalopods have been utilised in neuroscience research for more than 100 years particularly because of their phenotypic plasticity, complex and centralised nervous system, tractability for studies of learning and cellular mechanisms of memory (e.g. long-term potentiation) and anatomical features facilitating physiological studies (e.g. squid giant axon and synapse). On 1 January 2013, research using any of the about 700 extant species of “live cephalopods” became regulated within the European Union by Directive 2010/63/EU on the “Protection of Animals used for Scientific Purposes”, giving cephalopods the same EU legal protection as previously afforded only to vertebrates. The Directive has a number of implications, particularly for neuroscience research. These include: (1) projects will need justification, authorisation from local competent authorities, and be subject to review including a harm-benefit assessment and adherence to the 3Rs principles (Replacement, Refinement and Reduction). (2) To support project evaluation and compliance with the new EU law, guidelines specific to cephalopods will need to be developed, covering capture, transport, handling, housing, care, maintenance, health monitoring, humane anaesthesia, analgesia and euthanasia. (3) Objective criteria need to be developed to identify signs of pain, suffering, distress and lasting harm particularly in the context of their induction by an experimental procedure. Despite diversity of views existing on some of these topics, this paper reviews the above topics and describes the approaches being taken by the cephalopod research community (represented by the authorship) to produce “guidelines” and the potential contribution of neuroscience research to cephalopod welfare.

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“…Second, as a benthic species, cuttlefish probably experience low-visibility conditions on a regular basis. Since cuttlefish have large and sensitive eyes (Groeger et al, 2005), and can camouflage themselves in extremely low-light conditions (Allen et al, 2010b;Buresch et al, 2015), it is unlikely that their vision is affected much by turbid water. However, the vision of many potential fish predators may be affected by water turbidity (Utne-Palm, 2002).…”

Section: Discussionmentioning

confidence: 99%