The costs of sex in seaweeds

摘要: The brown seaweeds (Fucales) include dioecious and hermaphrodite species genera with one, two, tour or eight eggs per oogonium. costs of gamete production, measured as biomass, are very small. Eggs represent only 0.1–0.4% body weight. Females do not produce more gramme tissue than hermaphrodites. Hermaphrodites occupy upper shore zones the biotically richer submerged zones. Neither egg size nor number correlate habitat sexuality. Some these observations hard to reconcile theoretical concepts sex.