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May 9, 2026Green Technology Resilience and Sustainability0 citationsOpen Access

Partial replacement of fishmeal with acid-fermented chicken intestinal waste silage in the diet of rainbow trout, Oncorhynchus mykiss fingerlings to ascertain growth, survival and haemato-biochemical parameters

UWUbaid WaniSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir FRFaisal RashidSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir OAOyas AsimiSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir

Key Points

The study aims to assess the impact of replacing fishmeal with acid-fermented chicken intestinal waste silage on growth and health parameters in rainbow trout fingerlings.
Conducted a 90-day trial with 160 rainbow trout fingerlings randomized into four treatment groups with varying fishmeal replacements (0%, 10%, 20%, 30%) by CIWS.
Provided iso-nitrogenous diets, measuring growth performance and haematological parameters.
Monitored twice-daily feeding at 5% of body weight.
T2 (20% fishmeal replacement) achieved the best growth performance metrics: final weight (797.68 g), body weight gain (576.25 g), and feed conversion ratio (FCR 1.73).
Haematological indicators like haemoglobin (9.18 g/dL) and RBC (1.45 × 10⁶/mm³) peaked in T2, suggesting improved fish health.
No survival issues were noted, with a 100% survival rate across all treatments.

Abstract

A ninety (90) day experimental trial was conducted to evaluate the effect of acid-fermented chicken intestinal waste silage (CIWS) in the diet of rainbow trout fingerlings (Oncorhynchus mykiss) by the partial replacement of fishmeal. After an acclimatization period of seven (7) days, a total of one hundred and sixty fingerlings (160) were distributed to sixteen (16) fiber tanks of 100 L capacity by following a completely randomized design. Four iso-nitrogenous (42% crude protein) diet plans were prepared to replace 0%, 10%, 20%, and 30% of fishmeal with acid-fermented chicken intestinal waste silage, and in accordance with four treatments, each with four replicates, were designed as Control T0, T1, T2, and T3 diets, respectively. Fish were fed twice a day at a rate of 5% of their body weight. The growth performance and haemato-biochemical parameters were significantly affected by dietary treatments (p < 0.05). T2 yielded the best growth performance, with the highest final weight (797.68 ± 5.19 g), body weight gain (576.25 ± 5.03 g), SGR (1.15 ± 0.01), and weight gain percentage (260.25 ± 2.2%) in comparison to other treatments (p < 0.05). Haematological parameters, including haemoglobin (9.18 ± 0.45 g/dL), RBC (1.45 ± 0.06 × 10⁶/mm³), and haematocrit (37.32 ± 0.18%), were also highest in T2, while ALT and AST were lowest, indicating improved hepatic health. T3 showed a decline in growth and haemato-biochemical indices, with elevated cholesterol (42.19 ± 3.17 mg/dL) and triglycerides (39.15 ± 2.68 mg/dL). The lowest FCR was recorded for T2 (1.73 ± 0.01) depicting improved feed utilisation. Haematological parameters such as haemoglobin (9.18 g/dL) and RBC (1.45 × 10⁶/mm³) improved progressively up to 20% inclusion, while T3 showed a decline. Survival was recorded @100% across all treatments. Therefore, the current study demonstrated that acid-fermented CIWS can effectively replace fishmeal up to 20% in rainbow trout diets without adverse effects on growth and health indices.

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Cite This Study

Wani et al. (Thu,) studied this question.

synapsesocial.com/papers/69fed008b9154b0b82876fc2 https://doi.org/https://doi.org/10.1007/s44173-026-00034-y

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