A putative research model for sustainable fisheries driven by noninvasive diagnostic imaging
Hirokuni Miyamoto, Hirokuni Miyamoto, Shunsuke Ito, Kenta Suzuki, Shingo Tamachi, Shion Yamada, Takayuki Nagatsuka, Takashi Satoh, Motoaki Udagawa, Hisashi Miyamoto, Hisashi Miyamoto, Hiroshi Ohno, Jun Kikuchi · The Innovation Life · 2025
Diagnostic imaging technology has been developing rapidly in recent years, and the demand for its application is mainly in the medical field. Here, we examined the scope of application that enables rapid functional evaluation using disease-resistant fermented feed for fish as a model for evaluation in the primary industry. A survival test against the fish pathogen Edwardsiella tarda revealed the antipathogenic properties of a compost-type feed additive fermented by thermophilic Bacillaceae using nonedible marine resources. After prior administration of the compost extract to seabream as a fish model for 70 days, the mortality rate after 28 days of exposure to the fish pathogen Edwardsiella peaked at 20%, although the rate was 60% without prior administration. Under such conditions, the serum complement activity of seabream tend to increase. Furthermore, the differences in the degrees of body length, smoothness and glossiness of the fish body surface depending on the administration conditions were computationally analyzed using the field photographs. The texture analysis for the grey level co-occurrence matrix (GLCM) and local binary pattern (LBP), and color extraction analysis for colour tone (hue), colourfulness (saturation), and brightness (value) revealed quantifiable change in color balance of fish body surface after the compost administration. These results suggest that the antipathogenic property of thermophile-fermented compost as a functional feed additive can be efficiently estimated by an external diagnostic technique. This study provides a new perspective for the utilization of noninvasive diagnosis to estimate quantitatively the quality of its production activities in the food and environmental industry.