[Specific features of digestive function development in larvae of some salmonid fish]

Area of Science:

• Ichthyology
• Fish Biology
• Digestive Physiology

Context:

• Larval development in fish represents a critical period of physiological and morphological change.
• Understanding digestive enzyme function is key to assessing nutritional requirements and growth potential in aquaculture.
• Herbivorous fish species present unique digestive challenges due to plant-based diets.

Purpose:

• To investigate the developmental patterns of key digestive enzymes in herbivorous fish larvae.
• To quantify changes in enzyme activity related to carbohydrate and protein digestion throughout larval stages.
• To describe species-specific adaptations in the alimentary canal related to diet and development.

Summary:

• Digestive enzyme activities, including those for carbohydrate and protein digestion, were measured in plant-eating fish larvae.
• A consistent increase in the activity of all studied digestive enzymes was observed as the larvae progressed through development.
• The research elucidated distinct functional characteristics of the alimentary canal specific to different species.

Impact:

• Provides foundational knowledge for optimizing feeding strategies in aquaculture for herbivorous fish.
• Contributes to a deeper understanding of fish digestive physiology and adaptation to plant-based diets.
• Highlights the importance of developmental stage on digestive enzyme kinetics in fish.