Viaje a las profundidades del Océano (VIDEO) + Extrañas criaturas marinas (FOTOS)

  Pero, ¿qué es un Océano? U n océano es una enorme masa de agua salada que representa un importante ecosistema para el equilibrio ecológico de la Tierra y que constituye el  71% de la superficie terrestre , gracias a los 360,132,000 km² de su extensión. Y,  ¿cuántos océanos existen? Lo que cubre gran parte de la superficie de la Tierra, es en sí, un solo océano. Es decir, una sola masa de agua. Para un mejor estudio, el hombre dividió esta enorme masa en 5 partes de acuerdo a su ubicación geográfica. Por ello, la expresión “los océanos”, es correcta. Importancia de los océanos *Absorben entre un 25 y 30% del dióxido de carbono emitido a la atmósfera, por lo que Equilibran el clima de toda la Tierra. *Representan numerosos ecosistemas para diversas formas de vida animal, vegetal, bacteriana, protista y fúngica. *Son hogar para miles de especies, conocidas y aún desconocidas. Existen aproximadamente 250,000 especies conocidas, pero se cree que puedan haber 750,000 más. *Proveen fuentes

Why Dogs are More Like Humans Than Wolves

English article

Here below is a summary of a very interesting and instructive interview on Dog Intelligence to Dr. Brian Hare (see image below), director of the Duke Canine Cognition Center, co-author of The Genius of Dogs, and co-founder of Dognition.

What is the secret to dogs’ intelligence?
The genius of dogs is that they use probably the most powerful tool on Earth to solve problems—humans. At one point in wolf evolution, a group of wolves decided to take advantage of humans, and they have been really successful because of it.  When you talk about survival of the fittest, most people think nature is “red in tooth and claw.” But dogs domesticated themselves through a natural process, where the less aggressive, most friendly, tolerant individuals actually did much better.

How has the scientific understanding of dogs changed?
When identifying intelligence in animals, what people are most interested in is where animals make inferences. These are situations in which they can’t actually perceive a solution, so they have to infer it spontaneously. Scientists had theorized that dogs, through domestication, have become dumbed-down, because they just sit around and take scraps from us.  But it turns out in many ways dogs are more like us than even great apes.

How are they like us?
Dogs are the only species that have demonstrated that they can learn words in a manner similar to a little kid. Dogs are using an inferential strategy, which takes advantage of what’s called the principal of exclusion. They know that a number of objects are named or labeled with a sound, and when a new one is introduced that they do not have a label for, and they hear a new sound that they’ve never heard before, they infer that the new sound must apply to this new object. That has only been observed in human children before. Besides, several Border Collies (see image below) are using what’s called the principal of iconicity. You can show them a two-dimensional picture, and they will then go fetch the object in the picture. That’s something people thought only kids could do, and that it would only be in a linguistic species that that would be possible.

Isn’t it possible these dogs were outliers?
All dogs are probably able to make the type of inferences that the border collies are making... we just don’t know how to take advantage of.

What are some other new findings about dog intelligence?
There’s a lot of research into how dogs solve problems. For instance, in a new experiment, a dog demonstrated opening a sliding door, using one of two techniques. It turns out other dogs will copy the first dog and use that same technique the very first time they open the door.

You also cite studies that show dogs can be deceptive. How does that demonstrate genius?
Those studies show that dogs are using information about what humans can see or hear to make decisions about how to behave around us. In one study, dogs spontaneously avoid retrieving food from a box with noisemakers when they have been told not to eat it, [instead choosing to steal food from a box that a human has demonstrated does not make noise]. This suggests they might be aware of what we can and cannot hear. Similarly, a number of studies have shown that dogs avoid misbehaving if you are watching them, but are more likely to act up if you have your back turned, or even your eyes closed!

Can this new science of dog cognition help us train them better?
People love dogs, and they want to help their dogs have a rich life, and they can do that by helping their dogs obey some simple principles. But how do you get a dog to do that? One of the big schools of thought is you have to really be an alpha dog. You have to make sure the dog doesn’t think he can boss you around. That premise is probably based on some faulty rationale, that dogs evolved from wolves, and wolves have a very strict hierarchy. That’s a reasonable hypothesis, except that there’s one major problem: dogs are not wolves. Looking at feral dogs, what people have found is that they don’t have a strict hierarchy. It’s not that you follow the dominant individual. With feral dogs, the leader is the individual that has the most friendships in the group. It’s not about dominance.

There’s another school of training, which says that the more you practice the better they’ll be at sitting, staying, listening to you, obeying, etc. But there are studies that show that dogs that are trained less intensely actually learn faster and retain the information they learn longer. If you force animals to perform over and over, it actually makes a response less flexible.

Are dogs smarter than cats?
They’re designed to do different things. Compare the origins of these animals in the wild, their progenitors, the wolf and the wild African cat. You have one that is an endurance runner, a pack animal that relies on cooperation. You have another that is a relatively asocial, stalking hunter that relies on stealth to be successful. These are completely different social systems and ways of life, and evolution shaped those minds to be really different because they do completely different things in terms of how they make a living.

I’m guessing that many pet owners will have another response to your book: “There’s no way my dog is a genius. He drinks out of the toilet and chases his own tail.” Would these people be wrong?
There’s also tremendous individual variation in dogs. In the case of the dog that chases his own tail, that may be a dog that the person thinks is a little bit on the dumb side, but there are some domains of intelligence that people aren’t really thinking about. Just because one individual dog isn’t particularly good at using gestures, for example, it doesn’t mean that they’re not absolutely remarkable in their memory, or that they can’t use your visual perspective to deceive you. One of the things we’re trying to do in the book is change the conversation about what is intelligence. A lot of people may find out, the dog that just chases his tail, there’s actually a lot more there than they expected.


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