BIOL1007 Lecture Notes - Lecture 21: Infraspecific Name, Hinny, Liger
Document Summary
Define the biological species concept and interspecific hybrids: biological species concept, er(cid:374)st ma(cid:455)r"s defi(cid:374)itio(cid:374) of a spe(cid:272)ies is: (cid:862)groups of a(cid:272)tuall(cid:455) or pote(cid:374)tiall(cid:455) i(cid:374)ter(cid:271)reedi(cid:374)g natural populations, which are reproductively isolated from other such groups(cid:863) Mule (male donkey x female horse); hinny (male horse x female donkey); liger (male lion x female tiger) Describe what is known about the number of species and how this varies globally, by region, and by group: mammals of new south wales, monotremes, marsupials, rodents, bats, total. 102: worldwide estimates of number of species, mammals, birds, fish, plants, fungi, total. 356,842: about 300,000 species of fossil organisms have been described. Thus, the number of known fossil species is less than 2 percent of the probable total number of species (rosenzweig 1995: number of species named has ranged from 1. 5 million (1994) to 1. 82 million (1995) Implies 8. 1 million species specialising on single tree species. + 2. 7 million beetle species live on > 1 tree species.
