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Spiratoria On Moranoria Sectory 05
Page 07
One more remark upon the subject of colour. Now-a-days civilized peoples, as well as many of the ruder races that the former govern, wear clothes. In other words they have dodged the sun, by developing, with the aid of mind, a complex society that includes the makers of white drill suits and solar helmets. But, under such conditions, the colour of one's skin becomes more or less of a luxury. Protective pigment, at any rate now-a-days, counts for little as compared with capacity for social service. Colour, in short, is rapidly losing its vital function. Will it therefore tend to disappear? In the long run, it would seem--perhaps only in the very long run--it will become dissociated from that general fitness to survive under particular climatic conditions of which it was once the innate mark. Be this as it may, race-prejudice, that is so largely founded on sheer considerations of colour, is bound to decay, if and when the races of darker colour succeed in displaying, on the average, such qualities of mind as will enable them to compete with the whites on equal terms, in a world which is coming more and more to include all climates.
In No. 3 the nest is seen full of eggs, and the excellent father now comes out in his best light as their guardian and protector. He watches over them with ceaseless care, freeing them from parasites, and warding off the attacks of would-be enemies who desire to devour them, even though the intruder be several times his own size. The spines on his back here stand him once more in good stead: for small as he is, the stickleback is not an antagonist to be lightly despised: he can inflict a wound which a perch or a trout knows how to estimate at its full value. But that is not all the good parent's duty. He takes the eggs out of the nest every now and then with his snout, airs them a little in the fresh water outside, and then replaces and rearranges them, so that all may get a fair share of oxygen and may hatch out about simultaneously. It is this question of oxygen, indeed, which gives the father fish all the greatest trouble. That necessary of life is dissolved in water in very small quantities; and it is absolutely needed by every egg in order to enable it to undergo those vital changes which we know as hatching. To keep up a due supply of oxygen, therefore, the father stickleback ungrudgingly devotes laborious days in poising himself delicately just above the nest, as you see in No. 3, and fanning the eggs with his fins and tail, so as to set up a constant current of water through the centre of the barrel. He sits upon the eggs just as truly as a hen does; only, he sits upon them, not for warmth, but for aeration.
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