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記cypode quadrata偽


記cypode quadrata偽
Photo Information
Copyright: Sergio Stella (flashpoint) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 630 W: 133 N: 4324] (28008)
Genre: Animals
Medium: Color
Date Taken: 2011-08-26
Categories: Crustacia
Camera: Nikon D90, Sigma AF150 f 2.8 EX DG APO HSM
Exposure: f/18.0, 1/125 seconds
More Photo Info: [view]
Photo Version: Original Version, Workshop
Date Submitted: 2011-09-07 4:03
Viewed: 5039
Points: 8
[Note Guidelines] Photographer's Note

Ocypode quadrata is a species of ghost crab, once described as an "occult, secretive alien from the ancient depths of the sea". It is a common species along the Atlantic coast of the United States, where it is the only species of ghost crab; its range of distribution extends from its northernmost reach on Rhode Island's beaches south along the coasts of the tropical Western Atlantic Ocean to the beach of Barra do Chui, in Rio Grande do Sul in Southern Brazil.
Adults are greyish or the colour of straw, and approximately 5 centimetres (2 in) wide at maturity. They must return to water periodically in order to moisten their gills, and when larvae must be released into the sea, but are otherwise terrestrial. Their stalked compound eyes can swivel to give them 360 vision. Young crabs are cryptically coloured to blend in with their sandy habitat.
O. quadrata lives in burrows in sand above the strandline. Older individuals dig their burrows further from the sea, some starting as much as 400 metres (0.25 mi) inland. Burrows can be up to 1.3 metres (4 ft 3 in) deep, and can be closed off with sand during hot periods.
O. quadrata can produce a variety of sounds, by striking the ground with the claw, by stridulation with the legs, and an incompletely explained "bubbling sound". Males compete in a heavily ritualised manner which prevents the need for physical contact.
O. quadrata is more active at night than in the day time, and is an omnivore, eating clams, insects, plant material, detritus and even other crabs.
Sandy beaches, a habitat frequented by ghost crabs, have seen a decrease in the abundance of ghost crabs due to human behavior. Ghost crabs are negatively impacted by human and vehicle trampling which results in direct crushing of crabs as well as indirect damage such as compression of sediment which reduces habitat suitability, interference with reproductive behaviors, reduction in food supply, and light pollution. Consequently O. quadrata is less common on beaches frequented by people.

source Wikipedia

in WS a frontal image....enjoy!

my mood today for Freddie Mercury - Love Kills (Metropolis)

Make: NIKON CORPORATION
Model: NIKON D90
Software: Adobe Photoshop CS4 Windows
Exposure Time: 8/1000 sec
F-Stop: f/18.0
Focal Length: 150/1 mm
Date Taken: 2011-08-26 15:56
Metering Mode: Pattern
File Size: 249 kb

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Critiques [Translate]

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2011-09-07 4:22]

Ciao Sergione,o hai il passo felpato o hai uno zoom della Madonna..grande cattura mentre il granchio va a nascondersi,grande timing,giusto in tempo prima che sparisca ed impressionante nitidezza.Buona giornata,Luciano

great and very sharp capture, TFS Ori

Ciao Sergio, beccato giusto giusto prima che scomparisse. Un'altra grande immagine ricca di luce e di dettagli. Un caro saluto, Paolo

  • Great 
  • Nilson Gold Star Critiquer/Gold Note Writer [C: 488 W: 0 N: 566] (4423)
  • [2011-09-07 10:26]

Bel疄simo trabalho de macro muito bom a composi誽o, nitidez excelente imagem meus parab幯s por esta linda foto.
Nilson

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