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This Concept Map, created with IHMC CmapTools, has information related to: Dolphin Cognition & Conservation CMap, dolphins may suffer from depression & even commit suicide ("Harley" cracked his own skull on the concrete floor of his enclosure), Grammar and Syntax and possibly posses a "language", Research on Dolphins in "the Wild", Research on Dolphins causes us to ponder if it is ethical to keep such "sentient" animals in captivity, Captivity from Grimm 2011, dolphins can recognize another dolphin's individually distinctivie whistle call (its "signature name") up to 20.5 years after being apart, to ponder if it is ethical to keep such "sentient" animals in captivity and yet much more of our knowledge about dolphin cognition comes from research on captive populations (as compared to wild populations), dolphins housed at San Diego Bay's Navy Research Station, "the Wild" from Grimm 2011, Grimm 2011 reveals that dolphins, self-awareness / are "sentient". This was shown when dolphins could recognize themselves in the mirror after being "tattooed" ("Tab" & "Presley") and show self-awareness levels similar to chimpanzees & humans, Stromberg 2014 reveals that dolphins, Grimm 2011 reveals that dolphins in 2 Florida populations show cultural transmission. Moms teach their young how to hunt., dolphins comprehend Grammar and Syntax, pointing which dogs can comprehend (but apparently not chimpanzees), San Diego Bay's Navy Research Station could leave their pens if they wanted to, dolphins have brains only slightly smaller than humans (and larger then chimps). They have an advanced neocortex which is thought to allow self-awareness; problem-solving; & emotions, human gestures specifically pointing, a higher mortality rate (5.6% - 7.4%) compared to wild populations (3.9%) although mortality rates in the wild may be underestimated (National Marine Fisheries Services data suggest no significant differenc in mortality), Research on Dolphins in Captivity