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A comparative study of cellulase and xylanase activity in freshwater crayfish and marine prawns
Author(s) -
Crawford Allison C,
Richardson Neil R,
Mather Peter B
Publication year - 2005
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2005.01259.x
Subject(s) - crayfish , biology , xylanase , cellulase , prawn , penaeus , crustacean , decapoda , cellulose , botany , food science , fishery , shrimp , biochemistry , enzyme
Cellulase and xylanase digestive enzyme activities were compared in four freshwater crayfish (Genus Cherax ) and three marine prawn (Genus Penaeus ) species. Temperature and pH profiles for cellulase (endoglucanase) were found to be very similar in all species, with maximum activity occurring at 60°C and pH 5.0. Temperature and pH profiles for xylanase (endoxylanase) were also very similar in all crayfish species, with maximum activity occurring at 50°C and pH 5.0. Xylanase activity was not detected in the three prawn species examined. In addition, in vitro studies showed that most species were able to liberate glucose from carboxymethyl cellulose, indicating that cellulose substrates can be a source of energy for both crayfish and prawn species.