Effects of Functional Fish Organizations on the Fractal Characteristics of the Microstructure of Feces
作者机构：Shandong Univ Marine Coll Weihai 264209 Peoples R China
出 版 物：《JOURNAL OF OCEAN UNIVERSITY OF CHINA》 (J. Ocean Univ. China)
年 卷 期：2024年第23卷第6期
页 面：1655-1665页
核心收录：
学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0701[理学-数学] 070101[理学-基础数学]
基 金：National Natural Science Youth Foundation of China Natural Science Foundation of Shandong Province [ZR2021QD149]
主 题：functional fish organizations feces microstructure fractal characteristic scanning electron microscopy (SEM) particles (pores) and cracks analysis system (PCAS)
摘 要：Fish feces affect the structure and function of aquatic ecosystems, and they are affected by the functional fish organizations. In this research, Ctenopharyngodon idellus, Hypophthalmichthys molitrix, and Cyprinus carpio were selected to study the effects of different functional fish organizations on the fractal characteristics of fecal micro-structure by scanning electron microscopes (SEM), particles (pores) and cracks analysis system (PCAS). The results showed that fish feces pores mainly consisted of medium pores (cumulative pore number, 97%) classified by the International Union of Pure and Applied Chemistry (IUPAC). The grain area fractal dimension D1 and the pore-number and pore-size fractal dimension D2 were 1.94-1.96 and 2.07-2.19, respectively. The distribution of fish feces pores was very close to the Sierpinski carpet structure, which is the basic fractal construction methods widely used to describe the fractal of pore surface distribution. D1 (1.96) and D2 (2.19) of Hypophthalmichthys molitrix were the maximum values of the three functional organizations. Combining with the habit of fish, it is inferred that the feces of H. molitrix, the finer the feed and the faster the swimming of fish, the higher the content of feces clay, the larger the fractal dimension of feces, the easier it is to decompose feces, and the high the content of nutrients and organic matter to release into the water. It is demined that fish functional organizations affected the fractal characteristics and the stability of fish feces in water. This study is helpful for further research on water quality prediction and the impact of functional fish organizations on the structure and function of the ecosystem.
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