Marine biology

Effects of temperature and pH on the digestive enzymes activities of juvenile striped beakperch Oplegnathus fasciatus

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  • 1. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Key Laboratory of Fisheries Genetic Resources and Aquaculture, Chinese Academy of Fisheries Sciences; Guangzhou 510300, China; 2. College of Fisheries and Life, Shanghai Ocean University, Shanghai 201306, China
罗奇(1986—), 男, 江苏省宿迁市人, 硕士研究生, 主要从事鱼类繁殖生物学研究。E-mail: luoqi198@163.com

Received date: 2008-10-15

  Revised date: 2009-02-23

  Online published: 2011-10-10

Supported by

中国水产科学研究院水产种质资源与养殖技术重点开放实验室开放基金(2007A014)

Abstract

The effects of temperature and pH on digestive enzymes activities (stomach, intestine and liver) were investigated in juvenile striped beakperch Oplegnathus fasciatus. The results indicated that the optimum temperature for protease in intes-tine and liver was 25℃, and that in stomach was 28℃. The optimum temperature for amylase in stomach and liver was 22℃, and that in intestine was 19℃. The optimum temperature for lipase in three digestive organs was all 16℃. During 16℃ to  28℃, the protease and lipase both had relatively high activities, however, the amylase had a lower activity. The optimum pH values for protease, amylase and lipase were 3.2, 7.6 and 4.2 in stomach, and 8.6, 6.6 and 6.6 in intestine, respectively. The optimum pH in liver was 7.6 for protease, and 6.6 for amylase and lipase.

Cite this article

LUO Qi,OU You-jun,AI Li,LI Jia-er . Effects of temperature and pH on the digestive enzymes activities of juvenile striped beakperch Oplegnathus fasciatus[J]. Journal of Tropical Oceanography, 2010 , 29(5) : 154 -158 . DOI: 10.11978/j.issn.1009-5470.2010.05.154

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