trait | Island syndrome | Reversed Island syndrome (RIS) | Trait changes mediated by increased POMC activity (the involved MCR is indicated) |
---|---|---|---|
Population density | high | Low or inconstant | - |
Aggressiveness | low | high | high, MC5R |
Body size | usually large | small in endotherms, either small or large in ectotherms | small, MC3-4Rs |
Energy expenditure | low | high | high, MC3,4R |
Sexual dimorphism | small | high | - |
Development | - | faster, or anticipated | - |
Voracity* | low | high | Either low or high, depending on the balance between MC3R and 4R |
Pigmentation* | irrelevant | darker, but may occur in non-melanistic species as well | darker, MC1R |