File:Haliotis spadicea (blood-spotted abalone) (South Africa) 4 (23594094474).jpg
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[edit]DescriptionHaliotis spadicea (blood-spotted abalone) (South Africa) 4 (23594094474).jpg |
Haliotis spadicea Donovan, 1808 - interior surface of a blood-spotted abalone from South Africa (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA). The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores. The abalones are an odd group of gastropods that have a coiled, cap-shaped, aragonite shell with a curvilinear set of excurrent respiratory holes. Interior shell surfaces have intensely iridescent nacreous aragonite ("mother of pearl"). Abalones are hard substrate algae grazers. From museum signage [typos and mis-spellings corrected]: "Abalones are gastropod molluscs that typically have a widely open shell with holes. The holes serve to expel water after it circulates through the animal during breathing. Some abalones have very elegant shapes and striking colors and their beauty is boosted by the presence of a colorful layer of mother-of-pearl lining the interior of the shell." "There are about 75 species of abalone. These species live on submerged rocks along different continents and islands, usually in cold water areas The West Coast of the U.S. is rich in abalone species. Abalones attach themselves to the rocks using a powerful shell muscle. They are herbivores, grazing on seaweed, with help from a set of specialized teeth called a radula." The blood-spotted abalone shown above is part of the South African Province: "The huge waves and cool waters of South Africa have produced a molluscan fauna dominated along its rocky shores by large limpets and abalones. Its beaches are often strewn with colorful, offshore cones, trochids and volutes. At certain seasons the cast-off egg-cradles of three species of paper nautiluses are found abundant on some beaches." [info. from museum signage} Classification: Animalia, Mollusca, Gastropoda, Haliotidae Locality: unrecorded locality in South Africa More info. at: en.wikipedia.org/wiki/Haliotis and en.wikipedia.org/wiki/Haliotis_spadicea |
Date | |
Source | Haliotis spadicea (blood-spotted abalone) (South Africa) 4 |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/23594094474. It was reviewed on 3 February 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 February 2016
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current | 10:45, 3 February 2016 | 1,940 × 1,372 (1.42 MB) | Patko erika (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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ISO speed rating | 80 |
Date and time of data generation | 16:29, 2 January 2016 |
Lens focal length | 18.6 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 22:27, 6 January 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 16:29, 2 January 2016 |
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APEX shutter speed | 2.3125 |
APEX aperture | 4.59375 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
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Flash | Flash did not fire, compulsory flash suppression |
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File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 15:27, 6 January 2016 |
Unique ID of original document | 3F25B4ADDF615856F481C6FA8C7808FE |