The Aquatic Ape Theory proposes that such an aquatic phase, during which ancestral hominids relied on a water habitat, explains much of the distinctive anatomy of recent humans. Proponents of the Aquatic Ape Theory compare the predictions of their model with the predictions that they derive for a traditionalist model, which they term the "Savanna model".
Culture out of Africa next chapter The Contradictory Diversity of Anthropoid Societies Evolutionary equilibrium means that a strategy has to be optimal to any changes either sex might inflict, or any defection from the game theoretic equilibrium the situation might present. In the context of sex this means that societies need to reflect the complementary interplay between the vastly differing reproductive investments females and males make, the one massive and forthright, and the other opportunistic and competitive.
Diverse ape societies derive their complexity and viability through responding to this sexual interplay, without the extensive capacity humans have for imposing 'artificial' cultural structures upon it. The relative clumping or diffuse nature of plant foods, determine, through the female foraging distribution, and the opportunities it provides males, whether ape species are monogamous very dispersed femalesform harems clumping sufficient for one male to guard several females - e.
Pan troglodite, and the bonobo or pygmy chimpanzee, Pan paniscus. In turn these reproductive patterns determine the shifting hierarchies and coalitions of social structure. The most promiscuous ape societies are the most complex and versatile. Monogamous gibbons lead a solitary and relatively sterile existence in widely spaced territories with little social interaction.
For Gorillas there is a little more dynamic movement. Largely affairs are dominated by a silver back who retains dominance over his harem while struggling endlessly against being toppled and his females robbed by a more powerful male.
But females will also mate with a younger male if he is present in the group. However only in chimp and bonobo societies do social complexities and subtleties really come to the fore.
Right High resolution evolutionary tree of great apes Kronenberg et al doi: While a traditional DNA-based tree places primates and humans much closer to rodents, as highly evolved branches, with the elephants diverging earliest, an miRNA analysis places rodents as branching out earliest, something which might seem to be consistent with their possibly closer correspondence to the founding shrew-like mammalian type.
The critical question determining the fate of the miRNA perspective is what the rate of loss of these small RNA molecules is in evolution.
A higher rate of loss would tend to remove the inconsistency. While the picture is consistent with retaining miRNAs in mammalian diversification, in insects and a primitive chordate sudden losses have occurred. Kronenberg et al doi: This work marks a new stage in our ability to study and compare these species.
Structural variation in the genome is important, particularly on the short evolutionary timescale that separates humans and other great apes, because it provides a way for genomes to evolve rapidly.
When a whole chunk of DNA is removed or duplicated, its molecular function can be inhibited or enhanced in one step, rather than through successive mutations at individual bases. Much of the great-ape genome seems to be modular in nature, and is therefore susceptible to these kinds of changes. It has also been discovered that gene loss is a key mechanism for evolutionary change Sharma et al.
This might seem counterintuitive, but genes often act to constrain, rather than promote, a particular function. Disabling them by removing, duplicating or relocating a chunk of DNA might be the simplest way to confer beneficial effects.
The authors found aboutstructural differences between these genomes and that of humans, including more than 17, differences specific to humans.Occasionally in science there are theories that refuse to die despite the overwhelming evidence against them. The “aquatic ape hypothesis” is one of these, now championed by Sir David.
Devil In The Dark () The Horta was an example of Silicon life.; Now we are really sailing off into terra incognito. "Here be dragons" and all that. But if you have starships, you almost have to have aliens (Isaac Asimov's Foundation trilogy being the most notable exception).The "science" is called Astrobiology, the famous "science in search of a subject".
Aquatic Ape Theory or Semi-Aquatic Human Ancestor Theory? What is it? Controversy Surrounding A Name. The ‘Aquatic Ape Theory’ (AAT) aka ‘Aquatic Ape Hypothesis’ (AAH) has given rise to a great deal of controversy in recent decades, and not only among opponents of the theory.
Perhaps it's because the name implies that an early ape-like . Feb 02, · It’s difficult to deny that humans began as Homo sapiens, an evolutionary offshoot of the timberdesignmag.comheless, for most of what is properly called “human history” (that is, the history.
A New Aquatic Ape Theory. A gorilla in the Congo wading in a swamp The hypothesis was met with so much criticism that it’s not even mentioned in human evolution textbooks. But that doesn’t. The drunken monkey hypothesis proposes that human attraction to ethanol may derive from dependence of the primate ancestors of Homo sapiens on ripe and fermenting fruit as a dominant food source.
Ethanol naturally occurs in ripe and overripe fruit when yeasts ferment sugars, and consequently early primates (and many other fruit-eating animals) have evolved a genetically based behavioral.