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Originally Posted by
Witis
Don't agree at all, once you remove birds of prey birds, they actually become extremely likable.
I'm not saying that birds are not likeable.
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You can't just spout statements like that without backing it up with at least one source.
Here you go:
https://www.google.com/
I tried "birds mating for life" and the first link called that statement an urban legend then went on to explain why it wasn't true. There were plenty of other sites on the first page. Frankly, I didn't bother citing anything because I have heard so many stories about this over the last two decades (including humorous skits about it) that I didn't realize it was a secret.
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Further I have to disgree, for example, the albatross:
So you found one unusual bird that may or may not cheat. Here's another take on it:
http://www.smithsonianmag.com/scienc...907109/?no-ist
Another item from Wiki:
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Extra-pair copulation/fertilization/paternity[edit]
Birds are one of the only major taxa where monogamy is the dominant mating system.[4] Prior to the advent of genetic techniques, it was assumed that the majority of monogamous birds remained faithful to their partners.[46][46] However, it is now known that extra-pair copulations (EPCs), extra-pair fertilizations (EPFs), and extra-pair paternity (the raising of another’s offspring, EPP) are actually quite common in a variety of avian orders and families.[47] Roughly 70% of birds that used to be considered genetically monogamous actually engage in EPCs and raise extra-pair young (reviewed by:[48]).
Though you will be happy to hear that there are some seabirds in which no EPF or EPC has been identified.
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I looked at a few videos of geese mating and couldn't see anything particularly offensive.
I never even considerd seeing whether there was goose porn on line, but I'm not surprised. Apparently, domestic geese are not as violent. Wild geese certainly are, and I have seen it first hand.
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Fish will keep on growing until they die particularly if there is no pressure on their food supply. So will many other species including crayfish and shellfish. It is called Indeterminate growth - "In zoology, indeterminate growth refers to the condition where animals grow rapidly when young, and continue to grow after reaching adulthood although at a slower pace. It is common in reptiles, most fish, and many mollusks." - wiki
Ok, that's technically true, but they don't grow forever, they just grow for their lifespan, which isn't all that long in most cases. Lobster can grow to fantastic sizes, though, but even then the rate of growth slows as they age and there appears to be some asymptotic upper limit as there is with fish.
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There may be documentation of a squirrel eating a dead squirrel but I very much doubt that you could find any evidence of a squirrel killing another squirrel, however, in both cases, any of those behaviours would be considered exceptional rather than typical.
Why?
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It is not fratricide you are thinking of in the case of mammals, it is infanticide, in quite a few species of mammals males that take over a family group will kill the offspring of the previous male. For example it can happen in the case of lions and also prairie dogs (although the lionesses often step in and prevent the killing where possible). It is a very unlikeable trait and if combined with other negative aspects it can certainly assist building a case against a particular species.
Yes, the infanticide you describe is quite common, and extends to other species than just those you list. However, fraticide also occurs. I was just reading about a wolf pack attacking another wolf pack in Yellowstone...can't remember where, at the moment, but it was within the last month or two. That was direct, lethal, competition for resources.
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Yep, the goal isn't to kill their rivals in the case of sheep, goats, deer, etc. the fights occur to establish firmness for breeding purposes, although the challenges can get extremely violent at times as you described. The females don't want to carry the young of those less likely to survive, so the sparring keeps the herd in top form.
Ya, I wasn't saying it was wrong, I was just saying that it happens. The goal is to produce as many offspring as possible, the fighting is only a means to an end, and not even a particularly good one. After all, some salmon males mature in fresh water rather than migrating to the ocean. These precocial males then sneak in and fertilize eggs. They can fertilize around 30% of the eggs in a redd, while the male is fighting off other males and ignoring those insignificant precocials.
As far as I'm concerned, the whole thing is about maximizing genetic representation in the next generation. ALL the conflicts can be seen that way. Any behavior that advances that will be reinforced, while any behavior that undermines that will fade out. The whole bit about right and wrong of a behavior is just a human construct.
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I am also referring to wild boars including warthogs, I wonder how they behave on a regular basis?
Well, they are ugly as sin, so they tend to have inferiority complexes.
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Don't agree as the urea problem applies to many fish, and it is a rare fish that doesn't taste good to me.
That urea strategy is exceedingly rare. As far as I know, it is only found in sharks. Other ocean fish are hypotonic, so they have to use other strategies to maintain their solute balance.
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I luve to eat fish!
So do I, but with me you could largely make the same statement while dropping the word "fish".