منابع مشابه
What are the consequences of being left-clawed in a predominantly right-clawed fiddler crab?
Male fiddler crabs (genus Uca) have an enlarged major claw that is used during fights. In most species, 50% of males have a major claw on the left and 50% on the right. In Uca vocans vomeris, however, less than 1.4% of males are left-clawed. Fights between opponents with claws on the same or opposite side result in different physical alignment of claws, which affects fighting tactics. Left-claw...
متن کاملTowards Penetration-based Clawed Climbing
Despite significant research focused on running robots, very little progress has been made towards legged robots that are capable of climbing in natural environments. Unlike their running counterparts, climbing robots must generate hand or foot holds capable of pulling them toward the substrate. The majority of efforts to develop climbing robots have been for urban settings with smooth glass or...
متن کاملSurgical Intervention for the Clawed Hallux Deformity
Introduction The term clawed hallux refers to a specific deformity of the great toe. It is clinically defined as the extension of the first metatarsophalangeal joint (MTPJ) combined with flexion of the interphalangeal joint (IPJ). This imbalance is presumed to be a result of a functional “overpull” (a disproportionate load) of one or more of the three extrinsic muscles of the first ray: the per...
متن کاملDietary Chlosterol Requirement of Juvenile Narrow-clawed Crayfish (Astacus leptodactylus) in a Recirculating Aquaculture System
Dietary cholesterol has been shown to be essential for several crustacean species. However, cholesterol requirement of narrow-clawed crayfish has not been reported. Therefore, a 12-week feeding trial was conducted to determine deitary cholesterol requirement of narrow-clawed crayfish. Juvenile crayfish with an average body weight of 13.8±1 g mean weight were intensively stocked in an indoor rec...
متن کاملEvolution of RAG-1 in polyploid clawed frogs.
Possible genetic fates of a gene duplicate are silencing, redundancy, subfunctionalization, or novel function. These different fates can be realized at the DNA, RNA, or protein level, and their genetic determinants are poorly understood. We explored molecular evolution of duplicated RAG-1 genes in African clawed frogs (Xenopus and Silurana) (1) to examine the fate of paralogs of this gene at th...
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ژورنال
عنوان ژورنال: Nature
سال: 1893
ISSN: 0028-0836,1476-4687
DOI: 10.1038/047610a0