Determinations of some biochemical components and of amino acid composition of protein in aquatic vertebrate and invertebrate eggs have been undertaken from the comparative biochemical point of view. To begin with, matured ovarian eggs of rainbow trout (Salmo irideus), dog-salmon (Oncorhynchus keta), spiny dogfish (Squalus suckleyi), oval squid (Sepioteuthis lessoaiana), sea-hare (Dolabella auricula), and spiny lobster (Panulirus japonicus) were examined. Results obtained are shown in Tables 1 and 2.
The biochemical composition of egg varies, generally, with species of animals in respect of the contents of water, protein, lipides, ashes, etc. The amino acid composition of protein, as determined by ion exchanger chromatography, is not always the same according to the source of the sample: The rainbow trout eggs and dog-salmon eggs are rich in the amounts of alanine, phenylalanine, valine, but poor in the amount of glycine, the spiny dogfish eggs are rich in arginine, proline, serine, but poor in tyrosine, the oval squid eggs are rich in aspartic acid, isoleucine, lysine, threonine, tyrosine, but poor in proline, the sea-hare eggs are rich in aspartic acid, glutamic acid, glycine, proline, but poor in histidine, and the spiny lobster eggs are rich in aspartic acid, glycine, histidine, but poor in leucine, methionine and serine.
