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Branchinecta Gigas
''Branchinecta gigas'' is a species of fairy shrimp that lives in western Canada and the United States. It is the largest species of fairy shrimp, growing up to long. It is known commonly as the giant fairy shrimp. Description Females reach sexual maturity when they are long, and grow up to long; males reach only . Unpublished records exist of individuals up to long. Despite being the largest species, ''B. gigas'' has the proportionally smallest eyes of any species in the family, and possibly in all Anostraca. Distribution ''Branchinecta gigas'' has been found in Alberta, Saskatchewan, Washington, Montana, Oregon, North Dakota, Utah, Nevada and California. A related species, '' B. raptor'', occurs in Idaho. Ecology and behaviour ''B. gigas'' lives in hypersaline lakes and rivers, with salinity ranging from 1.8‰ to 5.8‰. These waters often have high turbidity (low visibility), and so ''B. gigas'' hunts by touch rather than by sight. When feeding, ''B. gigas'' adopts a "h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
