Chromatophores and color revelation in the blue variant of the Siamese fighting fish (Betta splendens)

Amiri, M. H.; Shaheen, Huda M.

doi:10.1016/j.micron.2011.07.002

Cited by 33 publications

(34 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to broadband silver reflection, several species of colored fish, such as the blue damselfish (Chrysiptera cyanea), [45] the Siamese fighting fish (Betta splendens), [46] and the neon tetra fish (Paracheirodon innesi) ( Figure 2g) [31,33,47] reflect light of specific wavelengths, resulting in defined colors. This narrowband colored reflectivity is obtained when the variability in the thicknesses of the crystals and the cytoplasm layers is low.…”

Section: Narrowband Reflectorsmentioning

confidence: 99%

“…In addition to the neon tetra, tunable-color multilayer reflectors have been reported in the blue damselfish (Chrysiptera cyanea), [45] the Siamese fighting fish (Betta splendens), [46] the common surgeonfish fish (Paracanthurus hepatus), [50] the dark sleeper (Odontobutis obscura), [51] and the domino damsel (Dascillus trimaculatus). [50] There are also some examples of tunable reflectors in other animals such as the panther chameleon [25] ( Figure 2j) and the Sapphirinidae copepods (Figure 3a,d).…”

Section: Tunable Reflectorsmentioning

confidence: 99%

See 1 more Smart Citation

Light Manipulation by Guanine Crystals in Organisms: Biogenic Scatterers, Mirrors, Multilayer Reflectors and Photonic Crystals

Gur

Palmer

Weiner

2016

Adv Funct Materials

152

197

View full text Add to dashboard Cite

Guanine crystals are widely used in nature to manipulate light. The first part of this feature article explores how organisms are able to construct an extraordinary array of optical "devices" including diffuse scatterers, broadband and narrowband reflectors, tunable photonic crystals, and imageforming mirrors by varying the size, morphology, and arrangement of guanine crystals. The second part presents an overview of some of the properties of crystalline guanine to explain why this material is ideally suited for such optical applications. The high reflectivity of many natural optical systems ultimately derives from the fact that guanine crystals have an extremely high refractive index-a product of its anisotropic crystal structure comprised of densely stacked H-bonded layers. In order to optimize their reflectivity, many organisms exert exquisite control over the crystal morphology, forming platelike single crystals in which the high refractive index face is preferentially expressed. Guanine-based optics are used in a wide range of biological functions such as in camouflage, display, and vision, and exhibit a degree of versatility, tunability, and complexity that is difficult to incorporate into artificial devices using conventional engineering approaches. These biological systems could inspire the next generation of advanced optical materials. Figure 2. Examples of guanine crystal-based optical systems with different functionality, and their corresponding architecture. a-c) The white widow spider (Latrodectus pallidus):The integument of the spider (a) is white due to coherent scattering from a thick dense layer of blocky guanine crystals ≈1 µm in size (b), located beneath the integument. Impinging light is scattered multiple times from neighboring randomly distributed crystals (c) before emerging. d-f) The Japanese Koi fish (Cyprinus carpio). The silvery reflection of the fish (d) arises from disordered multilayer reflectors located in the epithelial layer underneath the scales of the fish (e). The thin (≈20 nm) plate-like guanine crystals are not all parallel to each other, but there is local order within each crystal stack. f) The cytoplasm spacings are widely distributed. Constructive interference of different wavelengths reflected from individual stacks results in diffuse broadband reflection, appearing silvery to the human eye (d, inset). g-i) The neon tetra fish (Paracheirodon innesi): The brilliant blue color of the lateral stripe of the neon tetra (g) arises from ordered, well aligned multilayer reflectors (h,i) with narrow distribution of thicknesses of both the thin guanine crystals (≈22 nm) and the thicker cytoplasm spacings (≈155 nm). Constructive interference of selected wavelengths reflected from individual stacks results in narrow band reflection centered at 500 nm (g, inset). j-l) The panther chameleon (Furcifer pardalis): The observed skin color of the panther chameleon (j) originates from a combination of both pigments and guanine-based 3D photonic crystals. Light is reflected from small ≈130 n...

show abstract

Section: Narrowband Reflectorsmentioning

confidence: 99%

Section: Tunable Reflectorsmentioning

confidence: 99%

Light Manipulation by Guanine Crystals in Organisms: Biogenic Scatterers, Mirrors, Multilayer Reflectors and Photonic Crystals

Gur

Palmer

Weiner

2016

Adv Funct Materials

152

197

View full text Add to dashboard Cite

show abstract

“…Pigments are important directly or indirectly in the production of most colours (Shawkey & Hill, ; Amiri & Shaheen, ). Pigments can be generally defined as molecules that selectively absorb light at various wavelengths.…”

Section: The Production Of Blue Coloursmentioning

confidence: 99%

On the perception, production and function of blue colouration in animals

Umbers

2012

Journal of Zoology

View full text Add to dashboard Cite

Bright colouration in animals has long attracted the attention of physicists, chemists and biologists. As such, studies on the functions of colours are interdisciplinary, focusing on the mechanisms of colour production and maintenance, the physical and chemical properties of the colour-producing elements, and visual systems and behaviour of potential receivers. Blue colouration has received a large share of research attention and is fascinating for several reasons: blue has been attributed to a very broad range of functions, blue is achieved by a great variety of mechanisms (although their production and maintenance costs are currently unclear), and the blue part of the spectrum (450-490 nm) can be perceived by most taxa. This review explores the breadth of studies that propose a function for blue colouration. In so doing, it discusses the diversity of ways in which blue colours are produced both as pigments and structural colours, and that blue visual pigments are common across a broad range of taxa. This analysis of the current literature emphasizes the importance of multidisciplinary hypothesis testing when attempting to elucidate the function of colours, the need for manipulative over correlative evidence for the function of colours, and, as colour research becomes evermore interdisciplinary, the need for well-defined consistent terminology.

show abstract

“…The earliest recorded study of iridescence of birds' feathers is found in Robert Hooke's book Micrographia (1665), in which he researched on Peacock feathers and discovered the effect of color changes in different refractive index media. However, birds are not the only species which possess these colors; – insects, marine life, and plants also exhibit pure structural coloration beside some examples combining structural colorations with colorants or pigments . Morpho butterflies, beetles, and dragonflies show iridescent coloration purely due to their complex structural nanoscale features on their wings and bodies.…”

Section: Introductionmentioning

confidence: 99%

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

Rashid

Hassan

Khandwalla

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

The Nicobar pigeon (Caloenas Nicobarica) belongs to the extinct dodo‐bird family and has been declared as an endangered species. Here, microscopic and spectroscopic measurements are carried out on the bird's feathers to study the structural coloration originating from the barbule nanostructures. A range of color shades is recorded with changing viewing and illumination angles at different locations of the feathers. A spectacular variation in colors is generated by photonic structures; red, green, and blue and their blends are observed. Hydrophobicity of the optical material is also investigated. A contact angle of ≈156° is observed demonstrating it to be superhydrophobic. Experimental observations of the optical properties are analyzed on these feathers for sensing made possible due to the material and structural properties at the interface between barbule's surface and solution. An optical response is observed with a redshift in optical spectra with increasing refractive index of the solution, which is correlated with concentration values. The structural coloration in Nicobar pigeon can be adopted for many practical applications such as color selective filters, nonreflecting coatings, and refractive index‐based sensing.

show abstract

Chromatophores and color revelation in the blue variant of the Siamese fighting fish (Betta splendens)

Cited by 33 publications

References 29 publications

Light Manipulation by Guanine Crystals in Organisms: Biogenic Scatterers, Mirrors, Multilayer Reflectors and Photonic Crystals

Light Manipulation by Guanine Crystals in Organisms: Biogenic Scatterers, Mirrors, Multilayer Reflectors and Photonic Crystals

On the perception, production and function of blue colouration in animals

Structural Coloration in Caloenas Nicobarica Pigeons and Refractive Index Modulated Sensing

Contact Info

Product

Resources

About