. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. GENERAL BIOLOGY 765 The study of numerous samples taken from the fish-stock Age-com- of a certain area may aim at ascertaining the age-com- theslstock°of position of that stock, and from the results the follow- fishes. ing main points in the natural history of the fish may be elucidated: (1) the age at which maturity occurs; (2) the. A • B Fig. 560. Two scales of five-year-old herrings. A, growth
. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. GENERAL BIOLOGY 765 The study of numerous samples taken from the fish-stock Age-com- of a certain area may aim at ascertaining the age-com- theslstock°of position of that stock, and from the results the follow- fishes. ing main points in the natural history of the fish may be elucidated: (1) the age at which maturity occurs; (2) the. A • B Fig. 560. Two scales of five-year-old herrings. A, growth under normal conditions ; B, abnormal growth in the third zone. duration of life ; and (3) the variations in the age-composition and magnitude of the fish-stock. Studies of this kind have shown us that various species. 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 Murray, John, Sir, 1841-1914; Hjort, Johan, 1869-. London Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
