In hermaphroditic helminth parasites. infrapopulation size or mating group size mostly affects some processes acting within the infrapopulation. Here. 30 natural infrapopulations (12-154 individuals) of the intestinal trematode Gyliauchen volubilis Nagaty. https://www.roneverhart.com/MLB-Pop-Vinyl-Figure-Khris-Davis-Oakland-A-s-27/