EGG SIZE IN ARCTIC, ANTARCTIC AND DEEP‐SEA FISHES
EGG SIZE IN ARCTIC, ANTARCTIC AND DEEP‐SEA FISHES
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北极、南极和深海鱼类的卵大小
DOI:
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发表时间:
1953
期刊:
影响因子:
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通讯作者:
N. Marshall
中科院分区:
文献类型:
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作者:
N. Marshall
deep-sea species. His summarized data for the first four families are listed in table 1. Antarctic fishes from the coastal zones: In only one species (or two, if Bouvet Island is included in the Antarctic region) are the sizes of the free eggs known. The measurements of all others have been made from an examination of the ovaries. 1.'hese are indicated (table 2) by the plus sign following the dimensions. indicating that the eggs are at least of this size. since there is likely to be an increase in the diameter of the eggs after fertilization and laying. Measurements (or data) on ripe or ripening ovarian eggs only have been taken, this being particularly indicated by the orange-yellow or brownish-yellow color of such eggs. Immature eggs always appear to be whitish, which can be clearly seen in ovaries containing more than one generation of eggs. The measurements are all in millimeters. Finally it may be conveniently noted here that judging from the distribution of the early larval stages, which have been taken almost entirely in coastal waters, and the finding of the eggs of H arpagifer bispinis in shallow water at Port Lockroy, Palmer Archipelago and those of a nototheniid near Bouvet Island (in 119 to 124 meters), the coastal fishes as far as known lay their eggs in relatively shallow waters. Since the tendency of arctic fishes to produce relatively large, yolky eggs has been considered by Rass (1941), it will only be necessary to discuss the data for antarctic species. Comparing representatives of the genus Notothenia from the Falkland Islands with species of other nototheniiform genera liv-