Zhi Luo
Professor, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
Summary of my work
My research interests focus on nutritional physiology and feed formulation of economic aquatic animals, mainly freshwater fish. My research consists of three aspects. The first one is identification and functional analysis of the genes involved in nutritional metabolism. Compared to mammals counterparts, additional paralogs of functional genes have been found from teleost-specific whole genome duplication. These paralogous genes show distinct difference in structure and expression profiles. My research mainly focuses on the structure, function and regulation of the metabolic genes. The second aspect is lipid deposition, metabolism, and fatty liver occurrence and control in fish. Although many studies have been done on effects of dietary nutrients on lipid deposition and metabolism in fish, their molecular mechanisms remain unknown. We study the mechanism and regulatory networks of lipid deposition and metabolism, using molecular biology and modern ‘omics’ approaches, aiming to find pathways to reduce fatty liver occurrence of fish in aquaculture. The third one is development of environmentally friendly feed formulation in fishery. It is inevitably essential to reduce waste (such as nitrogen and phosphorus) release into water in modern and sustainable aquaculture, which requires improvement of feed formulation.
Impacts in China
China was the earliest country for aquaculture and has a long history of aquaculture back to 3000 years ago. At present, China is the world’s largest producer and exporter of fish, contributing more than 60% of global aquaculture production. With the increasing production in aquaculture, there occur new problems. The first one is the affects on fish health. Under intensive aquaculture, fish tend to deposit excessive fat in liver and adipose tissue, which in turn greatly affects fish health. To reduce fat deposition and improve lipid utilization is a challenging research area. The second one is water pollution in aquaculture. With unbalanced feed formulation, fish excrete excessive nitrogen and phosphorus waste into water, which are major sources for eutrophication. We focus our research on feed formulations to improve nitrogen and phosphorus utilization in aquaculture and to develop means to reduce nitrogen and phosphorus release in aquaculture.