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Digestive system and physiology of digestion in a style-bearing mesogastropod snail Cerithidea cingulata (Gmelin)

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Relation http://eprints.cmfri.org.in/592/
 
Title Digestive system and physiology of digestion in a style-bearing mesogastropod snail Cerithidea cingulata (Gmelin)
 
Creator Sreenivasan, P V
 
Subject Molluscan Fisheries
 
Description An elaborate description of the digestive system of a style-bearing mesogastropod snail Cerithidea
cingulata (Gmelin), along with its digestive glands is given in this paper. The histology and histochemistry
of foregut, midgut, hindgut, digestive and hypobranchial glands have also been dealt in detail. The
physiology of the digestive system of this snail has shown that the foregut secretes no enzyme, while
the midgut is the site of high enzyme activity. The pH of the gut is neutral in the oral cavity, acidic
in oesophagus, stomach, style sac, digestive gland and intestine, but again alkaline in the rectum.
The studies on food and feeding habits of this snail have indicated that C. cingulata is a selective
bottom feeder and feeds on detritus with a preference of soft fine sandy muddy substratum. Analysis of
gut content showed the presence of sand grains, unicellular diatoms and minute scraps of algal filaments.
Gut microflora include gelatinolytic, caesinolytic, amylolytic, cellulolytic and lipolytic bacteria. The microbes
aid in digestion by splitting complex food materials into simple products to be acted upon by the native
enzymes and of help in extra- and intracellular digestion.
 
Publisher MBAI, Cochin-14
 
Date 1995-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/592/1/Sreeni_11-21.pdf
Sreenivasan, P V (1995) Digestive system and physiology of digestion in a style-bearing mesogastropod snail Cerithidea cingulata (Gmelin). Journal of the Marine Biological Association of India, 37 (1&2). pp. 11-21.