Fig. 7

Overview of the digestive trends in the examined species. To visualize the overall trends observed in each of these populations, for each experiment, the numbers were removed and each population was ranked. The colored triangles represent the quantity of each factor (for example: number of chloroplasts in unstarved animals) from large to small. Each population is listed according to rank. Species written in green are the traditional long-term chloroplast retaining species whereas those in blue are the short-term retaining species. E. viridis is designated in blue with an asterisk because it more closely resembles an StR form in this investigation, but has been classified as LtR in the past. a Total longevity in starvation from a long duration to short. E. timida 18 °C has the longest longevity in starvation and T. hopei has the shortest. The triangle is colored black and white to represent alive/dead. b PAM value rate of decrease. E. cornigera have the fastest decrease in photosynthetic efficiency during starvation. The triangle is blue/green because StR is often depicted in blue and LtR in green. c Functional chloroplast abundance in unstarved (Day 0) Slugs. Throughout this investigation, chloroplasts are indicated in red because of their autofluorescence. d The number of days until functional chloroplasts are no longer observed in the digestive gland. e Lysosome abundance within the Digestive Gland Tubule (DGT) for unstarved specimens (Day 0). A quadrilateral rather than triangle is drawn because the values are very similar. It is colored blue aligning with the pictures of lysosomes presented in this investigation. f The maximum lysosome abundance throughout the entire starvation period within the DGT. These maximums occur at different time points for each species. g Lysosome abundance in Non-Digestive Gland Tissue (NDGT) at Day 0. h Maximum lysosome abundance in NDGT throughout the starvation period