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The mixture with less wt.% of copper has higher density, higher hardness, and higher resistivity. The typical density of CuW90, with 10% of copper, is 16.75 g/cm 3 and 11.85 g/cm 3 for CuW50 . CuW90 has higher hardness and resistivity of 260 HB kgf/mm 2 and 6.5 μΩ.cm than CuW50. Typical properties of commonly used copper tungsten compositions [1]
Chaetostoma, also known as the bristlemouth catfish, is a genus of suckermouth armored catfishes native to South America with one species, C. fischeri, extending into Panama. [1] Most species inhabit flowing rivers in the lower Andes and its foothills . [ 2 ]
The low-eye catfish (previously family Hypophthalmidae), and thus the genus Hypophthalmus, which contains four species, was reclassified with the pimelodids. [ 3 ] This family previously included fish that are now classified under Pseudopimelodidae (previously subfamily Pseudopimelodinae) and Heptapteridae (previously subfamily Rhamdiinae). [ 3 ]
Fish of this genus are common in the aquarium trade where they are known as bushynose or bristlenose catfish. In the aquarium hobby they are often referred to as bushynose or bristlenose plecos instead, but this may lead to confusion as "pleco" usually is used for Hypostomus plecostomus and its allies and is often used as a catchall term for ...
The redtail catfish (Phractocephalus hemioliopterus), is a large species of South American pimelodid (long-whiskered) catfish. It is known in Venezuelan Spanish as cajaro ; in Guyana , it is known as a banana catfish , and in Brazil it is known as pirarara , [ 3 ] a fusion of words from the indigenous Tupi language : pirá and arara . [ 4 ]
Catfish (or catfishes; order Siluriformes / s ɪ ˈ lj ʊər ɪ f ɔːr m iː z / or Nematognathi) are a diverse group of ray-finned fish.Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia, and the piraíba of South America, to ...
Their chief common name, bristlemouth, comes from their odd, equally sized, and bristle-like teeth. They are typically black in color which provides camouflage from predators in deep, dark waters. They mainly feed on zooplankton and small crustaceans due to their small size.
The North American catfish has acquired an association with American Southern folklore which exceeds its place as a mere food fish. The image of cane-pole fishing for catfish at a proverbial lazy stream has become a stand-by of southern Americana. In some areas, the bullhead is seen as a desirable quarry, for its fighting qualities exceed its size.