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J Environ Biol ; 2006 Oct; 27(4): 739-44
Article in English | IMSEAR | ID: sea-113494

ABSTRACT

The lunar cycle imparts certain stimulatory effects on the rhythmic behaviour of plankton and their life processes by which they actively migrate to the surface and gradually sink as the moon fades. This may also result in morphological changes in organisms, such as Lorica which becomes smaller towards the full moon night by changing the size of postero-lateral spines and surface area. In addition, cyclomorphic forms have been observed in zooplankton, which appears to be a suitable achivement for swarming and for the differentiation of sex by secondary sexual characteristics. Lunar rhythm in plankton appears to be governed by an internal clock, that is the "Biological clock".


Subject(s)
Animals , Biomass , Ecosystem , India , Moon , Periodicity , Plankton/growth & development
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