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File:Gills2.jpg

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Original file (2,190 × 1,518 pixels, file size: 886 KB, MIME type: image/jpeg)

Summary

Description
English: 1-Six of a series of gill-rakers attached to the gill-arch, showing ythe projecting rows of hooks, enlarged 50 times.

2-Six of the hooks attached to the gill-raker, enlarged 178 times.

3-diagram of gill-rakers in cross section, showing angle at wich hooks project from their point of attachment in toward the throat cavity, and the current of water passing out from it.
Date
Source Bulletin of the United States Fish Commission United States Fish Commission url
Author United States Fish Commission

Licensing

This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.

United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag.


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Captions

Gill-rakers

Items portrayed in this file

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image/jpeg

File history

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Date/TimeThumbnailDimensionsUserComment
current12:34, 6 June 2010Thumbnail for version as of 12:34, 6 June 20102,190 × 1,518 (886 KB)Citron{{Information |Description={{en|1=1-Six of a series of gill-rakers attached to the gill-arch, showing ythe projecting rows of hooks, enlarged 50 times. 2-Six of the hooks attached to the gill-raker, enlarged 178 times. 3-diagram of gill-rakers in cross se

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