Hari Sankar, H S; Babu,Philip(Cochin University of Science and Technology, December 30, 2013)
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Abstract:
The major digestive enzyme activities and digestive indices were compared between
Etroplus suratensis and Oreochromis mossambicus. Pepsin - like acid proteases that acts on low pH has been identified all along the digestive tract of both the fishes. Comparatively low alpha amylase activity is shown by the E. suratensis and the enzyme is distributed almost equally throughout the intestinal segments in both the species. Very low alkaline protease activity is found in the stomach of both the
fishes and in O. mossambicus, the enzyme activity diminishes extensively towards the posterior portion of the intestine whereas in E. suratensis the activity increases towards the posterior part. The present study showed that lipase is one of the prominent digestive enzymes in O. mossambicus with a remarkable specific activity throughout the digestive tract than that of E. suratensis .It has been noted that O. mossambicus has a higher values for digestive somatic index, hepato somatic index, intestinal coefficient and gut Vs standard length ratio than that of E. suratensis indicating its higher digestive and metabolic capabilities. The early maturity and fast growth of O. mossambicus can be explained by their enhanced digestive indices. The compa ratively low activities of acid protease, amylase, lipase and total alkaline protease of E. suratensis revealed poor digestive capacity than that of O. mossambicus
Mukundan, M K; Dr.Gopakumar, K(Cochin University of Science And Technology, July , 1982)
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Abstract:
Lipids constitute a significant portion of the
biomass of earth and lipolytic enzymes play a very important
role in lipid turn over. Apart from their biological
significance, lipolytic enzymes are also very important
in the fields of nutrition, food technology, medicine
and preparative and analytical lipid biochemistry.
Recent developments in the study of proteins and
enzymes have largely benefited the study of lipolytic
enzymes, that some of these enzymes were isolated in pure
form. Even today there is a continuous search for new and
potent sources of these lipolytic enzymes. The zest for
elucidating the structure and mechanism of action of the
enzymes obtained in pure form for biochemist still remains
unabated. The literature shows no record of such an
effort for the study of lipases from marine sources. The
fact that many fishes like oil sardine, mackerel, cat fish,
seer etc. contains large amounts of lipid shows the possibility
of the existence of lipases in significant amounts
necessitating their exhaustive study. Such a study will,
not only provide alternate sources for lipase but also will
provide methods to curb lipolysis and the resultant rancidity
and off flavor development in fish and fishery
products.
Description:
School of marine sciences, Central institute of fisheries technology, Cochin University of Science And Technology