File:Fish Melanophores Responding to Adrenaline.webm

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Original file (WebM audio/video file, VP8, length 10 s, 1,392 × 1,040 pixels, 9.96 Mbps overall, file size: 12.03 MB)

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English: 7x speed timelapse video of fish melanophores responding to 200μM adrenaline.

Melanophores are cells found on the skin and/or scales of many aquatic vertebrates including fish and amphibians. They are large cells which contain many dark pigment particles called melanosomes, made dark by the presence of the pigment melanin. These melanosomes are moved along microtubule tracks within the cell by motor proteins and can be rearranged to be dispersed within the cell (maximising light absorption by the melanosomes) or condensed near the centrosome (minimising light absorption). Organisms with melanophores trigger this movement of the melanosomes to change colour in response to stimuli.

In melanophores taken from the organism, in this case on a scale taken from a tilapia fish, this response can be triggered artificially in many ways. In this case 200μM adrenaline triggers the transition from dispersed to condensed melanophore organisation.
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Author Zephyris

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Date/TimeThumbnailDimensionsUserComment
current11:04, 11 July 201310 s, 1,392 × 1,040 (12.03 MB)Zephyris (talk | contribs)User created page with UploadWizard

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Format Bitrate Download Status Encode time
VP9 720P 1.03 Mbps Completed 21:31, 26 August 2018 13 s
VP9 480P 490 kbps Completed 21:31, 26 August 2018 10 s
VP9 360P 276 kbps Completed 21:31, 26 August 2018 7.0 s
VP9 240P 162 kbps Completed 21:30, 26 August 2018 6.0 s
WebM 360P 479 kbps Completed 11:04, 11 July 2013 13 s
QuickTime 144p (MJPEG) 894 kbps Completed 18:19, 25 October 2024 1.0 s

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