The embryo’s of the P.canaliculata contains 90% of perivitellin fluid proteins. This fluid proteins sharply decreases as the embryo’s development proceed to stage 4 and 5. Most proteins are incorporated and used at these stages must have been consumed as energy source, nutrients and converted into other components. Basically, there is no net increase in embryo protein content until hatchlings stages 3 and 4. these observed stages has the trend to increase protein level. Temporarily stored protein ( egg perivitellins) remain unaltered by the embryos. After hatchlings (stage 6) these proteins become depleted in juveniles. Therefore, protein conversion efficiency ( calculated as % of perivitellins energy transformed into embryonic tissues) was calculated between stages 1 and 4 and the 29% low value observed are not only used as embryo structure but also as source of energy.
source: Heras, H., & Pollero, R. J. (2002). Lipoproteins from plasma and perivellin fluid of the apple snail Pomacea canaliculata. Retrieved September 11, 2011, from http://www.cricyt.edu.ar/biocell/vol/pdf/26/12.pdf
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