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Amber Waves Directory 07
Page 04
Many of the smaller species of fishes, upon leaving these winter resorts, ascend small, clear brooks in large numbers for the purpose of depositing their eggs; as, when hatched in such a place, the young will be comparatively free from the attacks of the larger carnivorous forms. Among the lowest vertebrate often found in numbers in early spring in these meadow rills and brooks is the lamprey, _Ammocoetes branchialis_ (L.), or "lamper eel," as it is sometimes called. It has a slender eel-like body, of a uniform leaden or blackish color, and with seven purse-shaped gill openings on each side. The mouth is fitted for sucking rather than biting, and with it they attach themselves to the bodies of fishes and feed on their flesh, which they scrape off with their rasp-like teeth. Later in the season they disappear from these smaller streams, probably returning in midsummer to deeper water. Thoreau, who studied their habits closely, says of them: "They are rarely seen on their way down stream, and it is thought by fishermen that they never return, but waste away and die, clinging to rocks and stumps of trees for an indefinite period; a tragic feature to the scenery of the river bottoms worthy to be remembered with Shakespeare's description of the sea floor."
As the river seemed to describe a big loop, I had left it three days before, seeing plainly by the conformation of the country that we should strike it again sooner or later. We were marching once more by compass. My men, who had no faith whatever in the magnetic needle, were again almost paralysed with fear that we might not encounter the stream again. A thousand times a day they accused me of foolishness in leaving the river, as they said it would have been better to follow its tortuous course--notwithstanding the trouble we had in following it, owing to the dense vegetation near the water--rather than strike once more across country. They were beginning to lose heart altogether, when I told them I could see by the vegetation that we were once more near the water. Anybody accustomed as I am to marching through the forest could tell easily by the appearance of the vegetation some miles before actually getting to a stream.
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