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Study on digestive enzyme activity of Trachinotus ovatus II Effects of salinity and diurnal variation on digestive enzyme activity in juveniles

Fan Chunyan

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Abstract

Effects of salinity and diurnal variation on digestive enzyme activity in juvenile Trachinotus ovatus with the body weight of 0.82±0.15 g were studied.The Trachinotus ovatus was stocked in six different salinities(10,15,20,25,30 and 35).The results indicated :(1) The activity of amylase and lipase was highest in salinity 25,but the activity of protease was highest in salinity 30.The average digestive enzyme activity in salinity 20,25 and 30 was much higher than that in salinity 10 and 15.(2) The study on the diurnal variation of digestive enzyme activity of Trachinotus ovatus showed that the highest activity of protease,amylase and lipase appeared at 20∶00,8∶00 and 14∶00,respectively,while the lowest activity of protease,amylase and lipase appeared at 2∶00,17∶00 and 11∶00,respectively.

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What this paper is about

Effects of salinity and diurnal variation on digestive enzyme activity in juvenile Trachinotus ovatus with the body weight of 0.82±0.15 g were studied.The Trachinotus ovatus was stocked in six different salinities(10,15,20,25,30 and 35).The results indicated :(1) The activity of amylase and lipase was highest in salinity 25,but the activity of protease was highest in salinity 30.The average digestive enzyme activity in salinity 20,25 and 30 was much higher than that in salinity 10 and 15.(2) The study on the diurnal variation of digestive enzyme activity of Trachinotus ovatus showed that the highest activity of protease,amylase and lipase appeared at 20∶00,8∶00 and 14∶00,respectively,while the lowest activity of protease,amylase and lipase appeared at 2∶00,17∶00 and 11∶00,respectively.

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Available abstract

Effects of salinity and diurnal variation on digestive enzyme activity in juvenile Trachinotus ovatus with the body weight of 0.82±0.15 g were studied.The Trachinotus ovatus was stocked in six different salinities(10,15,20,25,30 and 35).The results indicated :(1) The activity of amylase and lipase was highest in salinity 25,but the activity of protease was highest in salinity 30.The average digestive enzyme activity in salinity 20,25 and 30 was much higher than that in salinity 10 and 15.(2) The study on the diurnal variation of digestive enzyme activity of Trachinotus ovatus showed that the highest activity of protease,amylase and lipase appeared at 20∶00,8∶00 and 14∶00,respectively,while the lowest activity of protease,amylase and lipase appeared at 2∶00,17∶00 and 11∶00,respectively.

Key concepts: Salinity, Amylase, Digestive enzyme, Biology, Lipase, Protease, Enzyme assay, Diurnal temperature variation

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Study on digestive enzyme activity of Trachinotus ovatus II Effects of salinity and diurnal variation on digestive enzyme activity in juveniles — Research Paper | ScholarLens