sexual dimorphism
- Thread starter ke1985
- Start date
The two sexes play different roles and so they adapt to fit those roles differently. Specifically, females have to carry around a kid for a while, and males often compete with others to establish breeding rights. These changes probably arise on chromosomes that determine the sex and so a change to the Y chromosome would not have an effect on the female population.
It helps save time if you don't have to flirt half the day before getting to the point where you can determine their sex.
It helps save time if you don't have to flirt half the day before getting to the point where you can determine their sex.
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What is the difference of roles between the male and female blue whale?
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uh reproduciton? and what is the exact difference in the morphology between them?
And then there is like, male competition as in peacock tails and moose waving their antlers about?
this is third grade stuff at best.
And then there is like, male competition as in peacock tails and moose waving their antlers about?
this is third grade stuff at best.
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Your condescending attitude is irritating.
I do not think this is third grade stuff and please do not expect everyone to meet your strict expectations of what "smart" posts look like.
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Females are generally 10-20 feet longer and heavier than males.
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ke sez...Your condescending attitude is irritating.
I do not think this is third grade stuff and please do not expect everyone to meet your strict expectations of what "smart" posts look like.QUOTE//////////
hespera sez....Ok man, sorry, that was uncalled for. So dont respond in kind.
This is very basic stuff, but i will try respectfully to answer any questions.
is there something about dimorphism that you think doesnt fit the ToE? Why are you asking about this?
Larger females btw, make sense in terms of the birth size of the offspring. Or number of eggs laid, say. It all depends on the environmental situation.
I do not think this is third grade stuff and please do not expect everyone to meet your strict expectations of what "smart" posts look like.QUOTE//////////
hespera sez....Ok man, sorry, that was uncalled for. So dont respond in kind.
This is very basic stuff, but i will try respectfully to answer any questions.
is there something about dimorphism that you think doesnt fit the ToE? Why are you asking about this?
Larger females btw, make sense in terms of the birth size of the offspring. Or number of eggs laid, say. It all depends on the environmental situation.
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Hyenas are larger than males and have around the same birth size as lions but lionesses are smaller than the males.
King cobra males are bigger but female anacondas are bigger.
This theory does not apply like you say it does.
I am just curious on why the size of sex fluctuates so much in the animal kingdom...although not in the primate group.
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Ke sez..."Hyenas are larger than males and have around the same birth size as lions but lionesses are smaller than the males.
King cobra males are bigger but female anacondas are bigger.
This theory does not apply like you say it does.
I am just curious on why the size of sex fluctuates so much in the animal kingdom...although not in the primate group." QUOTE//////////////
hespera sez....
Sure it does. You have to look at each species individually and learn their behavior physiology, habitat, predators etc. What is it about theory that you think does not apply? (try to be specific about one type of animal)
King cobra males are bigger but female anacondas are bigger.
This theory does not apply like you say it does.
I am just curious on why the size of sex fluctuates so much in the animal kingdom...although not in the primate group." QUOTE//////////////
hespera sez....
Sure it does. You have to look at each species individually and learn their behavior physiology, habitat, predators etc. What is it about theory that you think does not apply? (try to be specific about one type of animal)
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Sexual selection is nature's way of saying, 'hubba hubba big boy, come over here and get you some.'
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Why do some species remain monogomous and others polygamous? Why do some males devour their offspring? Why some females have several mates... Why, Why, why??? Ah, forget it. Too much to learn... Goddidit.
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You said large females make sense with birth size so shouldn't this apply to the big cats?
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Whale's life cycles need further study, blues especially, but we know from humpbacks and sperm whales that the males and females live quite different lifestyles, and so any apparent dimorphism can be explained by that, and by mating display.
IS there a particularly great level of sexual dimorphism in blue whales?
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Ke, like i said, it is a very individual thing for different species! Why do some lay millions of eggs, another only a half dozen? its about what works for them.
It is reproductive stragety; how many can you afford to produce, what is the optimum birth size, do you protect a few of broadcast thousands to the wind? Does the male help to protect them? is it possible to protect them? Do they need protection? l The answers to these explain the size of parents and offspirng.
Some animlas you cant tell at all to look at them whether it is male of female. Try it on snapping turtles! male and female look the same.
What you cited is not examples of a "theory not fitting". it is examples of creatures that youi would have to study in detail to understand their reproductive stragegy, for both the male and female.
Here is a bit of reproductive strategy from plants. A lot of seeds (from berries and fruit) will not germinate unless it has been thru the digestive tract of a bird. Now, do you have any idea why that might be?
It is reproductive stragety; how many can you afford to produce, what is the optimum birth size, do you protect a few of broadcast thousands to the wind? Does the male help to protect them? is it possible to protect them? Do they need protection? l The answers to these explain the size of parents and offspirng.
Some animlas you cant tell at all to look at them whether it is male of female. Try it on snapping turtles! male and female look the same.
What you cited is not examples of a "theory not fitting". it is examples of creatures that youi would have to study in detail to understand their reproductive stragegy, for both the male and female.
Here is a bit of reproductive strategy from plants. A lot of seeds (from berries and fruit) will not germinate unless it has been thru the digestive tract of a bird. Now, do you have any idea why that might be?
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What would be a selective advantage for a male croc to be bigger than females? Yes, ToE takes time and education to understand it, which is why creationism is so appealing for so many who don't want to think and would rather turn on John/Kate, Bachelor, AI, &c.
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Apparently not, because thats not what we see.
Increased size is not the ONLY way to improve offspring survival.
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