Replication Data for: The potential for cleaner fish driven evolution in the salmon louse Lepeophtheirus salmonis: genetic or environmental control of pigmentation?

The datasets consist of two files with data from two different experiments. Experiment 1: compares pigmentation of lice cultivated indoor and outdoors in two experiments, one in June and one in September 2008. Photos are taken using translucent light and pigmentation is measured as the mean grey value in 50 pixel wide area on the louse cephalothorax using ImageJ. An equivalent area in the background just outside each louse is also measured and subtracted from the area covered by the louse to give a measure on how much light that is blocked by each louse. Each louse was also given a subjective pigment score: 1= little pigmentation, 2=medium pigmentation, 3= heavily pigmented. Experiment 2: Salmon lice with little pigmentation from Trøndelag was cultivated in an outdoor tank to see whether they developed dark pigmentation when exposed to daylight and sunshine. An old laboratory strain (LsOslofjord) was cultivated in a neighboring tank to compare pigmentation between the two strains. Pigmentation was measured as in experiment 1