نوع مقاله : مقاله کامل علمی - پژوهشی
نویسندگان
گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and objectives: This study aimed to investigate the replacement of edible mealworms protein powder with fish protein powder in the diets of goldfish (Carassius auratus).
Materials and methods: The experiment involved 5 different diet and was conducted with 3 repetitions, with initial weight of 29.84 ± 1.53 grams. Over a period of 60 days, the fish were fed by control, D25, D50, D75, and D100 diets, which contained 0%, 25%, 50%, 75%, and 100% replacement of the protein, respectively. The fish were fed approximately 5% of their body weight daily. At the end of the study, growth performance, blood parameters (RBC, WBC, hemoglobin, and hematocrit), liver enzyme activity (AST, ALT, and ALP), as well as plasma albumin and glucose levels were assessed.
Results: The results indicated that there were no significant differences in growth performance across the different treatments (P>0.05). However, the highest final weight average, weight gain, and specific growth rate were found in the D50 (51.37±2.94 grams, 21.93±1.72 grams and 1.32±0.04%/d, respectively) treatment, while the D75 (3.74±0.14) treatment had the lowest feed conversion ratio. Hematological analysis revealed significant differences between the experimental treatments and the control group (P<0.05). Although there were no significant differences in plasma albumin levels among the experimental diets (P>0.05), treatments D25, D50, and D75 (6.87±1.14, 10.62±0.77 and 17.61±1.42 mg/dL, respectively) showed a significant reduction in plasma glucose levels compared to the control (24.23±2.86 mg/dL) group (P<0.05). There were no significant differences in AST enzyme activity among the treatments (P>0.05), but ALP activity was significantly higher in the experimental groups compared to the control (53.05±4.85 IU/L) group (P<0.05), with the highest level recorded in treatment D50 (93.08 ± 5.52 IU/L). Furthermore, ALT activity was significantly lower in the experimental groups than in the control (15.40±1.77 IU/L) group (P<0.05), with the lowest level observed in treatment D75 (2.21 ± 0.31 IU/L).
Conclusion: Overall, the findings suggest that incorporating at least 25% edible mealworm powder into the diet of goldfish does not negatively impact feed intake, blood parameters, liver enzyme activity, or levels of glucose and albumin in plasma. This means it could serve as a viable alternative to fish meal.
کلیدواژهها [English]
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