File:Balanus amphitrite (striped acorn barnacles) (Cayo Costa Island, Florida, USA) 2 (24385419245).jpg
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editDescriptionBalanus amphitrite (striped acorn barnacles) (Cayo Costa Island, Florida, USA) 2 (24385419245).jpg |
Balanus amphitrite (Darwin, 1854) - striped acorn barnacles encrusting driftwood in Florida, USA (January 2016). The crustaceans are a large group of arthropods that inhabit marine, marginal marine, freshwater, and terrestrial habitats. The crustaceans include crabs, lobsters, shrimp, crayfish, barnacles, ostracods, and other organisms. The oldest fossil crustaceans are in the Cambrian. The group experienced a significant radiation in the oceans during the Mesozoic Marine Revolution. The organisms shown above are striped acorn barnacles that are encrusting a piece of driftwood on a marine beach at Cayo Costa Island, Florida. Barnacles are sessile, benthic, filter-feeding, marine crustaceans that are obligate hard substrate encrusters. They are particularly common in intertidal, rocky shore environments. They can tolerate subaerial exposure during low tides but have to be in water at least occasionally. When submerged, they extend their feathery limbs to filter feed. The barnacle body is enclosed in a small, cinder cone volcano-shaped carapace composed of overlapping calcareous plates. Fossil barnacles first appear in Cambrian rocks. Striped acorn barnacles are relatively small and have a light-colored carapace with thin, purplish-colored stripes. This species is not native to Florida. Based on its fossil distribution, Balanus amphitrite is apparently native to the Indian Ocean and the southwestern Pacific Basin. It is now globally distributed in tropical and temperate, shallow marine environments. The species' geographic distribution is so widespread in modern seas as a result of human activity - the barnacles have frequently attached to ships that travel across entire ocean basins. Classification: Animalia, Arthropoda, Crustacea, Maxillopoda, Cirripedia, Sessilia, Balanidae Locality: marine beach at the southern tip of Cayo Costa Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 36' 48.74" North latitude, 82° 13' 19.91" West longitude) More info. at: en.wikipedia.org/wiki/Crustacean and en.wikipedia.org/wiki/Barnacle and en.wikipedia.org/wiki/Amphibalanus_amphitrite |
Date | |
Source | Balanus amphitrite (striped acorn barnacles) (Cayo Costa Island, Florida, USA) 2 |
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@N05/24385419245. It was reviewed on 14 August 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
14 August 2016
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current | 17:33, 14 August 2016 | 4,000 × 2,585 (4.18 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 15:25, 5 January 2016 |
Lens focal length | 6.2 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 | 20:00, 14 January 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:25, 5 January 2016 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 8.65625 |
APEX aperture | 6 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
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 | 13:00, 14 January 2016 |
Unique ID of original document | CEBD9D70F31F802C97E1F77C23BCB971 |