Figure 12. Comparison showing interpopulational differences of mean characteristics of life span and selfing reproduction capacity of isolatelly-maintained Lymnaea schirazensis specimens of four populations from different geographical origins, experimentally followed up from the day of their individual isolation immediately after hatching.

Populations studied: Albufera of Valencia, Valencia, Spain; Tiba, Delengate district, Egypt; Escuela A. Obrego, La Trinidad Tepango, Atlixco, Puebla, Mexico; and Jiutepec, Morelos, Huauchinango, Mexico. n = 10 snail specimens followed per population (for details on intrapopulational variability ranges during the laying period, see Table 6 and Table 7); tlc = mean total laying capacity (number of clusters/life span in days); lrsp = mean laying rate in sexually active period (number of clusters/laying period in days); tnld = mean total non-laying days within laying period.