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About 30% of the 500 known fish families show some form of parental care, and most often (78% of the time) care is provided by only one parent (usually the male). Male care (50%) is much more common than female care (30%) with biparental care accounting for about 20%, although a more recent comparative analysis suggests that male care may be ...
There is great variation in different animal groups in terms of how parents care for offspring, and the amount of resources invested by parents. For example, there may be considerable variation in the amount of care invested by each sex, where females may invest more in some species, males invest more in others, or investment may be shared equally.
Sexual selection is an evolutionary concept that has been used to explain why, in some species, male and female individuals behave differently in selecting mates. In 1930, Ronald Fisher wrote The Genetical Theory of Natural Selection, [3] in which he introduced the modern concept of parental investment, introduced the sexy son hypothesis, and introduced Fisher's principle.
This list is one of our many pieces showing love for animals. Scroll through it and have a nice feel-good moment. Scroll through it and have a nice feel-good moment. #1 A Happy Family
How much money will parents spend over a child's lifetime on toys? According to a new study by the Toy Industry Association, parents will spend $6500 dollars. And the sad part is, most kids play ...
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Kavanau (1987) was the first to find that unique bi-parental care seen in modern birds probably evolved from extinct birds. They developed the ability to provide protection, escorting, nurturing and egg guarding abilities for their young. Evolution of homeothermy and flight most likely occurred in bi-parental birds with precocial chicks.
The wife of a prominent Georgia attorney has been convicted of killing her husband and burning his body. On Thursday, Dec. 5, Georgia Superior Court Judge David L. Cannon Jr. sentenced Farris, 64 ...