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Fri 19 Jan 07 #1 
drakaina
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Display: The gestation period of x is an average of Y days
Question x->y: How long is the average gestation period of x?
Question y->x: Y is the average gestation period of which mammal?
Source: pretty much copied from http://encarta.msn.com/media_701500881_761572784_-1_1/Average_Animal_Gestation_Periods_and_Incubation_Times.html aparrt from the additional facts

An ass -- 365 days -- ass foals are fully weaned at one year and no longer need their mothers
A baboon -- 187 days -- Females typically give birth every other year
A Barbary Ape --210 days -- The young typically weigh 450g at birth
A Black bear --210 days -- The eggs of the female are not released from the ovaries until mating has occurred, this is called ‘induced ovulation’
A Grizzly bear --225 days -- The eggs of the female are not released from the ovaries until mating has occurred, this is called ‘induced ovulation’
A Polar bear --240 days -- includes a periuod of delayed implantation which assures that the cub is born during the best time of the year for survival (http://www.seaworld.org/animal-info/info-books/polar-bear/birth-&-care.htm)
A beaver --122 days-- Kits are born fully furred, with their eyes open and learn to swim soon after birth.
An American buffalo --270 days-- also known as American Bison
A Bactrian camel --410 days -- Calves are nursed for 5 years until they reach sexual maturity
A Cat --58-65 days -- Giving birth in Cats is called ‘Queening’
A chimpanzee --23 days
A chinchilla -- 110-120 days
A chipmunk -- 31 days
A cow -- 279-292 days -- Closer to 9 months than a human’s is!
A White-tailed deer -- 201 days -- Does are seasonally polyoestrous which means they come into heat for a short twenty-four hour period (usually in November).
A Dog -- 58-70 days -- the smaller the breed the shorter the gestation.
An Asian elephant -- 645 days -- Almost 2 years!!
An Elk -- 240-250 days
A Red fox --52 days -- Litters vary in size from 1 to 13 pups
A giraffe -- 420-450 days -- The giraffe is the only ruminant with gestation longer than a year (http://www.wildlife-pictures-online.com/giraffe-information.html)
A Domestic goat--145-155 days
A gorilla -- 257 days -- There is a 40% mortality rate for newborns in the wild which means that an adult female usually only has one surviving offspring produced every six to eight years.( http://www.seaworld.org/animal-info/info-books/gorilla/birth-&-care.htm)
A guinea pig -- 68 days-- Female guinea pigs are called sows; males are called boars
A hippopotamus -- 225-250 days
A horse -- 330-342 days
A human-- 266 days -- Humans are the only mammals whose brain keeps growing well after birth. This is called ‘secondary altriciality’
A kangaroo -- 42 days -- The joey then remains in its mother’s pouch for about 235 days, continuing to develop.
A leopard --92-95 days
A lion -- 108 days -- Because this is such a short gestation period for a large animal, the cubs are born blind, weighing only about a pound.
A llama -- 330 days-- Baby llamas are called crias
A mink -- 40-75 days -- Female mink have ‘delayed implantation’ which assures that the kits are born during the best time of the year for survival.
A Rhesus monkey -- 164 days
A moose -- 240-250 days-- The birth of twins is common.
A Meadow mouse -- 21 days
A muskrat -- 28-30 days -- At a month old the young are independent ebough to be ejected from the nest by the mother.
An American opossum -- 12-13 days -- one of the shortest gestation periods of all mammals,
An otter -- 270-300 days -- Otters emply ‘delayed implantation’ which assures that the cub is born during the best time of the year for survival
A Domestic pig -- 112-115 days -- There has been much concern from animal welfare groups over the use of gestation crates in which a farmed pig will spend most of her life.
A porcupine -- 112 days -- Has the longest gestation period of any rodent.
A puma -- 90 days
A Domestic rabbit -- 30-35 days -- When a doe gives birth it is called ‘Kindling’
A raccoon -- 63 days
A Black rhinoceros -- 450 days -- A calf weighs about 35 – 50 kg at birth,
A seal -- 330 days -- Pups are born on land but may be able to swim just a few hours after.
A California sea lion -- 350 days -- Sea Lionsemply ‘delayed implantation’ which assures that the pup is born during the best time of the year for survival
A Domestic sheep -- 144-151 days -- Ewes naturally come into heat in autumn or winter, meaning lambs are born in spring or summer when it is warm and grassy. Domestic sheep are given hormones to produce lambs throughout the year for meat.
A grey squirrel -- 30-40 days-- Female squirrels can mate only twice a year, but males can mate at any time.
A tiger -- 105-113 days -- The first two years of life is a dangerous time for tigers. The mortality rate is at least 50% (http://www.seaworld.org/infobooks/Tiger/birthtiger.html)
A Sperm whale -- 480-500 days -- The newborn calf is about 13 feet (4 m) long and weighs about 1 ton (0.9 tonnes)
A wolf -- 60-68 days -- The female wolf will continue to hunt with the pack right up until giving birth
A Grant’s zebra -- 365 days -- a newborn calf has brown and white stripes.


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Fri 19 Jan 07 #2 
species
Contributor

Humans are the only mammals whose brain keeps growing well after birth -

I think this really depends on the person.....

Not sure i'd want to retain the knoweldge, but very interesting.

BTW : A pig's orgasm lasts 30 minutes. (true, i timed it...)


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Fri 19 Jan 07 #3 
drakaina
Contributor

Moving swiftly on!

Ah well, i never retain any knowledge which explains a lot about my scores...
Am working on Life Expectancy of Mammals now, that's easier to guess i think.


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Fri 19 Jan 07 #4 
species
Contributor

U think? My knowledge of the expected life span of a muskrat is pretty limited...


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Fri 19 Jan 07 #5 
drakaina
Contributor

But given a choice between
1–3 years
65 years
30 years or
3-4 years

you'd have a fair idea which it was right?


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Sat 20 Jan 07 #6 
rodbox
Contributor

added thanks


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