@sfmatheson, @Bill_II
[quote="Mervin_Bitikofer, post:130, topic:41292,
quote=âMervin_Bitikofer, post:130, topic:41292â]
Iâm going to go out on a limb just based on that single sentence you quote
[/quote]
Yes, you are going out on a limb and sadly that limb is very weak, so it does not need to be sawed off. It falls of its own weight. I must admit that the same thing occurred to me. However I checked it out and this sentence, which is the title of a chapter, does not apply to the bird and the rhino, although maybe Dawkins wants us to think it does.
First of all, I scratch your back, you scratch mine, is a simple transaction and that is the way Dawkins treats it. But, does the bird scratch the rhinoâs back? (yes) and does the rhino scratch the birdâs back? (I hope not.) No! The bird grooms the rhino and, I think, acts as another pair of eyes for the poorly visioned behemoth, while the rhino provides the bird with protection from predators and food that its hooves uncover. This is symbiosis, both sides are in a mutually beneficial relationship, not a transaction that can be mutually beneficial.
To clarify Dawkins used a thought experiment demonstrates how he thinks symbiosis works. He posits three survival strategies that genes use to deal with mutual grooming. The first is the âSuckerâ (sic) which is the altruistic approach, that is âChristianâ approach, where the life form grooms others regardless as to whether it receives grooming in return. The second is the âCheat,â which never grooms anyone in return. This is the pair that is involved in the I (Sucker) scratch your back, you (Cheat) ride my back, that is take advantage of me.
A third approach Dawkins calls the âGrudgeâ who willingly grooms others, but not if they fail to return the benefit. This would seem to be the preferred approach, but Dawkins says they are all acceptable. The Cheat will thrive if there are enough Suckers to support him as we can see in the world today. pp. 184-86.
The fact is the sucker, cheat, grudge behavior does not apply to evolution and ecology, but to human behavior. Symbiosis is not transactional. It is a relationship.
The rhino is neither a sucker, a cheat, nor a grudge and the same with the bird. The same with all the symbiotic relationships in the world. Humans have a symbiotic relationship chickens, cattle, dogs, and cats. We do not have transactional relationships with them, we have a symbiotic relationship.