Fig. 2

Reproductive output in Unio crassus. (A) Unio crassus individual. (B) Study sites. (C–E) Examples of marsupia filled with glochidia, with an evaluation of the percentage of marsupial volume occupied by glochidia. (F–I) Number of broods raised per season (dots; left axis) and mortality intensity over 20-day intervals (grey bars; right axis) in relation to the timing of the first spawning event within the season (x-axis). d_f = mean mortality of females (see col. 11 in the tab. 2). Data are pooled across all study years for each river. (J–M) Median percentage of marsupia filled in consecutive spawning events of individual females during the reproductive season (dots: median; boxes: 25th–75th percentiles; whiskers: minimum–maximum). (N–R) Each dot represents the total percentage of marsupial filling, summed across all spawning events for a given individual, shown in relation to the timing of its first spawning event within a given season.