A Bears Life

Last updated by peggie at 2014-4-21

Table of Contents

TOPINTRODUCTION


"A woman without a man is like a fish without a bicycle."

  – Gloria Steinem


Panda families consist of mama bear and baby bear, with papa bear completely out of the picture as soon as mama bear and papa bear have mated, meaning that papa bear is about as useful to mama bear and baby bear, at that point, as is a bicycle to a fish. Though it would appear that pandas live out their lives in this reduced nuclear family type of structure, they do have occasional social contact with one another via communications, namely via vocalizations (they "talk" back and forth) and via the the scent trails that they leave in their respective "territories" (the panda is not considered to be territorial, strictly defined, though, for all intents and purposes, the female with cub is), which scents communicate to other pandas all that other pandas, whether male or female, need to know about them, so pandas do not live in total nuclear-family isolation.

Pandas in the wild reach sexual maturity, on average, at the age of 7, while pandas in captivity, due to their state of enhanced nutrition and general health, reach the age of sexual maturity by, on average, the age of 5. A male can tell by the scents left on trees, shrubs, etc,, whether a female is in heat. In addition, the female makes barking calls that alerts any male within a rather extended distance that she is available, drawing him closer to her where he can follow the progress of her state of estrous.

A male will traverse the territory of several females, mating with each of them, and since several males follow the same procedure, it means that a female in heat mates with multiple males, the primary function of this behavior being to ensure that the female will be fertilized (well, the pleasure that is thus spread around probably doesn't do any harm to the broader social relations among pandas in general, eh?).

Pandas mate in the spring, in the months of March to May, with each female being accessible to successive males for only a short period of time, namely, between 2-4 days. But fret not, the area's males are fully apprised of when the period is approaching, for they keep tabs on this development by regularly "reading the tea leaves", as it were, i.e., by analyzing the female's scent as the period of estrous reaches its fruition, and, as indicated, the female will have loudly "telegraphed" her willingness to mate via the special barking sounds that she produces, which barking sounds have but one interpretation. Each male will generally fertilize the female successive times over a brief period, before moving on to the next available female.

A Bear's Life

Cute Pandas in China

Gestation (the period of pregnancy) is quite short, requiring only 3½–5½ months. When the time for the birth begins to near, the female instinctively builds a den, and, if she has a teenager in the household, it is at this point that the teenager will be sent packing, i.e., will be sent off to discover the wide wide world on its own. Since the panda's young are not prepared to fend for themselves until they are around two years old, the female only conceives, at most, every other year, or when the teenager is roughly two years old.

The life of an adult giant panda is pretty much a routine affair, with males fertilizing the available females in the spring of each year (both male and female pandas in the wild can reproduce more or less their entire lives, i.e., until about the age of 20), otherwise making themselves rather scarce, but naturally foraging for food for about two-thirds of every day, and sleeping, lounging about and poopng the rest of the time. The adult female spends the first part of the birth cycle caring pretty intensively for the infant, and as soon as it is able to fend for itself, or when it is roughly two years old, the cycle begins anew for her. Like the male, she will spend the lion's share of her day foraging for food, the rest distributed over playing with baby (toddler, teenager), sleeping, lounging and pooping (I make a point of mentioning this particular detail because pandas poop a lot!).

The most interesting panda story to be told, however, is that of baby panda...

TOPBABY BEAR

The giant panda infant is born a helplessly blind (its eyes are "sealed"), toothless and naked little creature with only a very light "down" of fine white hair that cannot conceal its tiny, fragile, pink-skinned body. In fact, the panda infant is so tiny (about the size of a standard hotdog!) and defenseless that one wonders why the panda did not develop into a marsupial (an animal that carries its young in a protective pouch, like the kangaroo or the opossum). The infant panda is so small that the mother has to cradle it carefully in a paw, remaining loyally with her baby for several days as it suckles, without leaving the den even for water, much less for food. The giant panda infant will first open its eyes after a period of six to eight weeks, but there will go an additional six to eight weeks (at about three to four months of age) before the cub will begin to crawl.

The newborn panda infant will make great demands on its mother the next several weeks, as it must be nursed a dozen or so times in a 24-hour cycle, and from 15-30 minutes at a time. Since the giant panda infant is helpless (it cannot grip firmly enough to hold onto mother's fur, most of its energy goes toward suckling, and its bones are too soft to support it), mother panda cannot take the infant with her when she feeds, therefore she must leave it in the den for up to 4 hours at a time, where it is vulnerable to predators.

As an indication of the hair coloration pattern to come, the giant panda infant will develop gray splotches on its skin where the dark fur (black or dark-brown, as the case may be) will eventually appear. After a month or so, the baby cub will have developed a complete pelt that is a mini version of the final color pattern that will characterize the adult panda (the color markings of every panda are unique, even if the dark patches always occur in certain given areas). The panda cub continues to suckle until it is one year old, though it will have begun to take some solid food already at the age of about six months.

As the panda cub grows, it suckles less frequently and for shorter periods, but at this stage, the panda cub can also suckle much more efficiently. From the moment the cub begins to crawl until it can walk, albeit, gingerly at first, is a very short span. Soon after the cub takes its first tentative steps, mother panda will begin to play with it, rolling it over and gently wrestling with it, both of which activities help the cub to develop its musculature and its reflexes, strengthening the agility that the cub will need in order to accompany mother on trips to the "kitchen", and of course, in order to climb, which will be the young cub's main activity on its first several trips to the "kitchen", though the cub will eventually spend more and more time eating bamboo alongside its mother. At the age of one, a normal panda cub will weigh a healthy 45 kilograms (ca.100 lbs), with males weighing slightly more than females, and this gender spread only intensifies thereafter, with fully adult males weighing up to 15% more than females.

In the wild, if mother panda gives birth to two infants, only one of them will generally be permitted to survive, since it is extremely difficult for the mother to feed herself and suckle two infants – the sheer logistics of it would be quite daunting, given the time demands that a giant panda infant makes on its mother. Moreover, since the diet of the panda is very non-fatty, it is difficult enough for mother panda to convert the nutrients available to her into enough life-giving milk for one infant.

This is yet another of the limiting realities that a diet of bamboo carries with it. There are many creatures in the wild besides the panda that regulate the number of newborn that will be permitted to survive based on the availability of food once the litter arrives. Though it would be a harsh "Sophie's Choice" for a human to have to make, to the panda – as with the other animals who are faced with such a choice – it is as normal as any other part of their lives, and a survival mechanism surely kicks in that releases the mother from the normal instinct to protect a newborn. Indeed, some species may very well devour the surplus infants, not letting any "windfall" food source go to waste (shudder!).

In captivity, surplus giant panda infants are much luckier – they all get to live, even if the surplus infants have to settle for zoo keepers as surrogate moms.

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