Morphology and oxygen supply characteristics of gills in tuna: a review
FU Wenya, WEI Lu, ZHANG Pengfei, XIAO Juan, HUANG Hai, MA Zhenhua, GUO Zhiqiang*
1.College of Life Sciences, State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University, Haikou 570228, China; 2. Key Laboratory of Utilization and Conservation for Tropical Marine Bioresources, Hainan Key Laboratory for Conservation and Utilization of Tropical Marine Fishery Resources, College of Fisheries and Life Science, Hainan Tropical Ocean University, Sanya 572022, China; 3.Tropical Aquaculture Research and Development Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Sanya 572018, China
Abstract: Tuna (Thunnus spp.) as pelagic fish with fast swimming are widely distributed throughout the temperate and tropical epipelagic waters of the world’s oceans. They require a large amount of oxygen supply to generate energy for fast swimming via gills as the oxygen supply organ. Focusing on the morphology and function characteristics of the gills during rapid swimming in tuna, this review descries the morphological structure of gills, gills surface area, oblique blood flow pattern and thin water blood barrier thickness structure and oxygen supply characteristics of related research. Further, to elucidate the structural adaptation (gill fusion, calcification, lamellar arrangement of gills) of tuna gills to high-speed water impact and the characteristics of gills countercurrent exchange. The morphological structure and problems in the field of oxygen supply for tuna gills are discussed and some progresses are suggested including the early tissue development of tuna gills, function of gills cells, mechanism of adaptive evolution of gills by bioinformatics and the relationship between tuna gills physiological processes and environmental factors to provide theoretical reference for further studied on the molecular mechanisms of tuna gills.
2022, Vol. 37 
