uca - translation to french
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uca - translation to french

GENUS OF CRUSTACEANS
Fiddler Crab; Fiddler crabs; Uca; Calling crab; Calling Crab; Tou-lou-lou; Ucinae; Fiddlercrab
  • General anatomy of a fiddler crab
  • Male lemon-yellow clawed fiddler crab (''[[Austruca perplexa]]''), waving his big claw in display

uca         
n. uca

Definition

fiddler crab
¦ noun a small amphibious crab, the males of which have one greatly enlarged claw. [Genus Uca.]

Wikipedia

Fiddler crab

The fiddler crab or calling crab may be any of more than one hundred species of semiterrestrial marine crabs in the family Ocypodidae, well known for their sexually dimorphic claws; the males' major claw is much larger than the minor claw, while the females' claws are both the same size. A smaller number of ghost crab and mangrove crab species are also found in the family Ocypodidae. This entire group is composed of small crabs, the largest being slightly over two inches (5 cm) across. Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps, and various other types of brackish or salt-water wetlands.

Like all crabs, fiddler crabs shed their shells as they grow. If they have lost legs or claws during their present growth cycle, a new one will be present when they molt. If the large fiddle claw is lost, males will develop one on the same side after their next molt. Newly molted crabs are very vulnerable because of their soft shells. They are reclusive and hide until the new shell hardens.

In a controlled laboratory setting, fiddler crabs exhibit a constant circadian rhythm that mimics the ebb and flow of the tides: they turn dark during the day and light at night.

Examples of use of uca
1. Pour Benjamín Cuellar, directeur de l‘Institut des droits de l‘homme de l‘Université UCA, au Salvador, ces méthodes renvoient tout droit ŕ celles de la Guerre froide: «La différence est qu‘on ne tue plus pour des raisons politiques mais pour éliminer un concurrent, ou nettoyer la société. Mon seul espoir, conclut–il, c‘est de penser qu‘il ne s‘agit pas d‘une politique délibérée de l‘Etat...
2. On en revient toujours ŕ l‘argent.» De son côté, Maja Perret–Catipovic rappelle que l‘Unité de crise pour adolescents suicidants (UCA) et l‘Unité étude et prévention du suicide des Hôpitaux universitaires de Gen';ve qu‘elle dirige n‘ont vu le jour et ne continuent ŕ fonctionner que grâce au financement de la fondation Children Action. «Les financements privés ont été et restent indispensables, reconnaît–elle.