title: Absence of age-related ploidy changes in a fish with indeterminate growth.
abstract: We considered the problem of age-related increase in ploidy of liver cells in the oyster toadfish Opsanus tau using a cytofluorometer. Over 90% of toadfish liver cells are diploid, and the ratio of diploid to tetraploid to octaploid cells remains constant in 3- to 11-year-old fish. The absence of ontogenetic increases in ploidy in toadfish, as opposed to mammals, correlates with fish patterns of indeterminate growth and plasticity.
mesh_terms: D000375:Aging; D000818:Animals; D004247:DNA / Q000378:metabolism; D005260:Female; D005399:Fishes / Q000235:genetics / Q000254:growth & development*; D008099:Liver / Q000378:metabolism / Q000648:ultrastructure*; D008297:Male; D011003:Ploidies
chemical_list: D004247:DNA