| Issue |
BIO Web Conf.
Volume 160, 2025
IV International Conference on Improving Energy Efficiency, Environmental Safety and Sustainable Development in Agriculture (EESTE2024)
|
|
|---|---|---|
| Article Number | 02011 | |
| Number of page(s) | 6 | |
| Section | Environmental Safety and Biodiversity | |
| DOI | https://doi.org/10.1051/bioconf/202516002011 | |
| Published online | 12 February 2025 | |
Digestive enzyme activities of African catfish and Nile tilapia reared in RAS
1 Yaroslavl State Agrarian University, 58, Tutaevskoe shosse, Yaroslavl, 150042, Russia
2 Papanin Institute for Biology of Inland Waters Russian Academy of Sciences, Borok settlement, Nekouz district, Yaroslavl region, 152742, Russia
3 Vitebsk State Order of the Badge of Honor Academy of Veterinary Medicine, Vitebsk, 220116, Republic of Belarus
* Corresponding author: e.skvorcova@yarcx.ru
The article considers morphological parameters and the activity level of digestive enzymes of African catfish and Nile tilapia grown at Volgorechensk Fish Farm in Volgorechensk, Kostroma Region. It was found that the fish had the characteristic fatness for their species (the fatness coefficient according to Fulton was 3.25±0.08 for tilapia and 0.93±0.06 for African catfish). It was found that the "intestine weight" parameter has the greatest variability in tilapia, and the "intestine length" parameter in catfish. The activity of sucrase and maltase in the intestinal mucosa is higher in African catfish, sucrase is 5 times higher, and maltase is almost twice as high, but the differences are not that great (1.7 times). The total proteolytic activity of the intestinal mucosa and chyme is higher in tilapia (2–3 times), but this can be explained by the fact that the protein components of the African catfish feed are mainly broken down in the stomach, where the activity of proteinases is quite high (6.3 μmol/g•min).
© The Authors, published by EDP Sciences, 2025
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