Question
The feeding intensity of fish determined by calculating
gastro-somatic index is equal toSolution
The gastro-somatic index (GaSI) is a crucial biological measurement used in fisheries science to assess: 1. Formula: 2. GaSI = Weight of stomach content / Total weight of fish ×100 3. Purpose: a. Quantifies feeding activity and nutritional status b. Helps determine optimal feeding schedules in aquaculture c. Indicates ecosystem health in wild fish populations 4. Interpretation: a. Higher GaSI = Active feeding phase b. Lower GaSI = Fasting or starvation periods Scientific Basis: This index is standardized in fisheries research and recognized by: • FAO fisheries technical papers • ICAR (Indian Council of Agricultural Research) guidelines • Journal of Fish Biology standards Practical Application: Aquaculture farms use GaSI to: • Adjust feed quantities • Identify disease outbreaks (abnormally low GaSI) • Monitor breeding cycles (pre-spawning fasting) Regulatory Reference: The method aligns with MPEDA (Marine Products Export Development Authority) quality protocols for farmed shrimp and fish exports. Note: For accurate results, measurements should be taken from live or freshly caught specimens before stomach contents degrade.
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