Levels of phosphoprotein in the eggs and ovaries of some fish species.
1. Protein (alkali-labile) phosphorus levels are given as percentages of the dry weight of mature eggs of fishes (one elasmobranch and seven teleost species). Levels in the eggs of the five marine-spawning teleosts are much lower (10-300 times) than in the two freshwater-spawning teleosts examined. 2. The protein phosphorus content of the dry matter of developing plaice eggs decreases by a factor of 20 during the later stages of development (maturation) before ovulation. 3. It is proposed that protein-linked phosphate may be utilised, possibly as a source of energy, during the massive water uptake which accompanies egg maturation in many marine species, including plaice.
D000818:Animals; D004531:Eggs / Q000032:analysis*; D005260:Female; D005399:Fishes / Q000378:metabolism*; D010053:Ovary / Q000032:analysis*; D010750:Phosphoproteins / Q000032:analysis*; D012487:Salmonidae / Q000378:metabolism
D010750:Phosphoproteins