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My Web Site Page 013 Ovations 01Zurokani Himoriana chose the topics covered by My Web Site Page 013 without reflecting upon the choices others have made. Basking in the glowing starlight of a midsummer night's spacial anomaly is another way to look at things in a different light. |
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To those whose acquaintance with fish is mainly culinary, it may seem odd to hear that the father stickleback alone takes part in the care of the nursery. But this is the rule among the whole class of fish; wherever the young are tended, it is almost always the father, not the mother, who undertakes the duty of incubation. Only two instances occur where the female fish assumes maternal functions towards her young; about these I shall have more to say a little later on. We must remember that reptiles, birds, and mammals are in all probability descended from fish as ancestors, and it is therefore clear that the habit of handing over the care of the young to the female alone belongs to the higher grades of vertebrates--in other words, is of later origin. We need not be astonished, therefore, to find that in many cases among birds and other advanced vertebrates a partial reversion to the earlier habit not infrequently takes place. With doves, for example, the cock and hen birds sit equally on the eggs, taking turns about at the nest; and as for the ostriches, the male bird there does most of the incubation, for he accepts the whole of the night duty, and also assists at intervals during the daytime. There are numerous other cases where the father bird shares the tasks of the nursery at least equally with the mother. I will glance first, however, at one of the rare exceptions among fish where the main duty does not devolve on the devoted father. |
The last trial of all was yet to be added, when we had come to within 300 m. of the river. The _seringueiro_, from whose hut we had started on our way out, had evidently since our departure set the forest on fire in order to make a _roca_ so as to cultivate the land. Hundreds of carbonized trees had fallen down in all directions; others had been cut down. So that for those last two or three hundred metres we had to get over or under those burned trees and struggle through their blackened boughs, the stumps of which drove holes into and scratched big patches of skin from my legs, arms and face. Where the skin was not taken off altogether it was smeared all over with the black from the burnt trees. We did not look unlike nigger minstrels, with the exception that we were also bleeding all over. |
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Among simple multicellular animals, such as sea-anemones, we find the beginnings of reflex actions, and a considerable part of the behaviour of the lower animals is reflex. That is to say, there are laid down in the animal in the course of its development certain pre-arrangements of nerve-cells and muscle-cells which secure that a fit and proper answer is given to a frequently recurrent stimulus. An earthworm half out of its burrow becomes aware of the light tread of a thrush's foot, and jerks itself back into its hole before anyone can say "reflex action." What is it that happens? | ||
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