Reproductive pattern of Lymnaea acuminata in different spectral band of visible light and natural sunlight

Kumar N Singh DK Singh VK     

Abstract

Terrestrial pulmonates freshwater snails are considered as intermediate hosts of food borne fluke infection affecting the liver, lung and intestines of animals. They are extremely sensitive to light possess photosensitive neurons in their brain and egg laying is mainly controlled by a bilateral group of neurons in the cerebral ganglia that is, the caudo-dorsal cells (CDSs). These neurons are the centre that releases a number of different peptides, including the egg laying hormone CDCH. It interacts with other internal signals that are important for egg laying. Eggs masses can be laid at a frequency of more than one mass per week, and such masses contain 50 to 200 eggs depending on the individuals body size. The present study shows the reproductive behavior of L. acuminata in different band spectrum of light and sunlight at different wavelength. Highest attraction was to red light band spectrum (660nm) and lowest to sunlight (700nm) in L. acuminata after 60 minutes. A significant change in fecundity, hatchability and survivability was observed, maximum fecundity in sunlight and minimum in red light. Minimum hatchability survivability was noted in red light exposed eggs. Prolonged exposure of red light caused delay in hatching period compared to sunlight. An increase in AChE activity (3.2 times) was noted in red light (660nm) then other visible spectrum of light which proves that red light is most attractive to the snails. So, visible spectral band of light might serves as a permissive signal that facilitates egg-laying behavior. The present study may be promising new safe strategy to replace unsafe ecological practices to reduce the population of intermediate hosts and ultimately in fasciolosis control.


MS Received Date:   2017-06-03  MS Accepted Date:  2017-07-10  MS Published Date:  2017-07-31
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Kumar N, Singh DK., Singh VK. "Reproductive pattern of Lymnaea acuminata in different spectral band of visible light and natural sunlight" Journal of Zoology Studies 4.3 (2017): 37-43.
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Kumar, N., Singh, DK., Singh, VK. (2017). Reproductive pattern of Lymnaea acuminata in different spectral band of visible light and natural sunlight. Journal of Zoology Studies, 4(3), 37-43.
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Kumar N, Singh DK, Singh VK. Reproductive pattern of Lymnaea acuminata in different spectral band of visible light and natural sunlight. Journal of Zoology Studies. 2017; 4(3): 37-43.
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