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Anciata Directory 06
Page 09
One wife, however, does not suffice to fill the nest with eggs; and the stickleback is a firm believer in the advantages of large families. So, as soon as his first mate has laid all her spawn, he sets out once more in search of another. Thus he goes on until the home is quite full of eggs, bringing back one wife after another, in proportion to his success in wooing and fighting. For, like almost all polygamists, your stickleback is a terrible fighter. The males join wager of battle with one another for possession of their mates; in their fierce duels they make fearful use of the formidable spines on their backs, sometimes entirely ripping up and cutting to pieces their ill-fated adversary. The spines thus answer to the spurs of the gamecock or the antlers of the deer; they are masculine weapons in the struggle for mates. Indeed, you may take it for granted that brilliant colors and decorative adjuncts in animals almost invariably go with irascible tempers, pugnacious habits, and the practice of fighting for the possession of the harem. The consequence is, with the sticklebacks, that many males get killed during the struggle for supremacy, so that the survivors wed half a dozen wives each, like little Turks that they are in their watery seraglios. Only the most beautiful and courageous fish succeed in gaining a harem of their own: and thus the wager of battle tells in the end for the advantage of the race, by eliminating the maimed, the ugly, and the cowardly, and encouraging the strong, the handsome, the enterprising, and the valiant. This is nature's way of preventing degeneracy.
We left at 7.30 a.m. under a limpid sky of gorgeous cobalt blue. We passed two islands--one 700 m. long (Leda Island), the other 2,000 m. (Leander Island). When we had gone but 11,500 m. we arrived at one of the most beautiful bits of river scenery I have ever gazed upon--the spot where the immense S. Manoel River or Tres Barras or Paranatinga met the Arinos-Juruena. The latter river at that spot described a sharp turn from 20 deg. b.m. to 320 deg. b.m. We perceived a range of hills before us to the north. Close to the bank gradually appeared a large shed with a clearing near it on a high headland some 200 ft. above the level of the river where the stream turned. On the left bank, before we arrived at the meeting-place of those two giant streams, we found a tributary, the Bararati, 30 m. broad.
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