Identifier: britishreptilesa00west (
find matches)Title:
British reptiles, amphibians, and fresh-water fishesYear:
1920 (
1920s)Authors:
Westell, W. Percival (William Percival), 1874-1937Subjects:
Reptiles Amphibians Freshwater fishesPublisher:
(London) : Chapman & DoddContributing Library:
Smithsonian LibrariesDigitizing Sponsor:
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view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:the centre as the orange yolk darkens, and theeyes of the little fish that is in process of developmentsoon appear. Later, there are still further changes until, atlast, the young fry, or alevin as it is called, bursts throughits covering, with the yolk-sac adhering to its belly asshown in Fig. 34. The contents of this latter keep thelittle fellow going for some few days. Meanwhile it isexperimenting with its swimming capacities, and develop-ing in other ways. Once the reserve food is used up,however, the perfect alevin has, of necessity, to shift foritself. Numerous enemies beset it, but if it survives itcommences to feed upon various water creatures, such asinsects, molluscs, and shrimps. But it takes time beforeany perceptible increase of stature is manifest as, at a yearold, the young Trout has only attained a length of afew inches. A year-old Trout is shown life-size in Fig.36. Brook, or Burn Trout as they may be called, do not grow to any size, indeed many of them are not much70Text Appearing After Image:f ■PO h Q Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.