Maggot meal was used to replace 0, 20% , 40% , 60% , 80% , 100% of the fish meal in the hasal feed, getting 6 kinds of feed with the same nitrogen content and equal energy （marked as group H0, H20, H40, H60, H80, H10...Maggot meal was used to replace 0, 20% , 40% , 60% , 80% , 100% of the fish meal in the hasal feed, getting 6 kinds of feed with the same nitrogen content and equal energy （marked as group H0, H20, H40, H60, H80, H100）, which were used to feed the Misgurnus anguillicaudatus （loach） for60 d. The effects of the fish meal replacement by maggot meal on the growth performance of M. anguiUicaudatus were studied by comparing the growth performances and body indica- tors of M. anguillicaudatus fed with different feed groups. The results showed that the final weight, weight gain rate, specific growth rate of the M. anguillicaudatus in group H40 showed no significant difference with the control P 〉0.05 ）, but was significantly higher than that of other groups P 〈0.05 ）. Moreover, except group H40, the feed coefficients of all other groups were significantly higher than that in control group （P 〈0.05 ）. The M. anguillicaudatus in group 1-140 had the highest condition factor and COR and the lowest viscera index, all of which showed significant differences with the other replacement groups （P 〈0.05） but the difference with the control group was not significant （P 〉 0.05）. Thus, a proportion of 40% of the fish meal replaced with maggot meal in the mixed feed for the M. anguilli- caudatus could improve the growth performance and physique indexes of M. anguillicaudatus.展开更多
Poverty, inadequate dietary intake, and diseases are the major causes of malnutrition in Nigeria. Averagely, Nigerians consume about 5.5 g of animal protein per day which is low compared to the minimum of 30 g per per...Poverty, inadequate dietary intake, and diseases are the major causes of malnutrition in Nigeria. Averagely, Nigerians consume about 5.5 g of animal protein per day which is low compared to the minimum of 30 g per person per day as recommended by Food and Agricultural Organization. The concept of household food security ensures that adequate food can be obtained, either through home production or purchases. Snail production is one of the means through which these ills could be eliminated. Protein deficiency that is endemic in developing nations can be reduced through the domestication of micro-livestock like snail which is rich in protein and iron. Sixty Achatina achatina hatchlings were used in a 90 days feeding trial. The hatchlings were assigned to four treatments in a Completely Randomized Design with three replicates each. Maggot meal was incorporated at the levels of 0.6, 1.4, and 2 kg per 100 kg of feed in treatments 2, 3 and 4, respectively. Treatment 1 had no maggot meal and served as the control. Results showed that snail weight, shell length and shell width increased with increase in the levels of maggot meal. Hatchlings on T3 and T4 had statistically similar values （P 〉 0.01） which were significantly （P 〈 0.01） higher than values obtained for hatchlings on T1 and T2 .Weight gain and feed conversion values of hatchlings on T3 and T4 were also significantly higher than values observed for hatchlings on T1 and T2. Therefore, maggot meal could effectively replace fishmeal in the diet of African giant snail hatchlings.展开更多
To reduce the pressure on aquatic resources due to the use of fishmeal in fish feed, the mastery and use of alternative sources of fishmeal in all stages of fish development are essential. Five diets including 4 exper...To reduce the pressure on aquatic resources due to the use of fishmeal in fish feed, the mastery and use of alternative sources of fishmeal in all stages of fish development are essential. Five diets including 4 experimental and one control diet were considered. Experimental diets of post-larvae were developed from unconventional ingredients in which fishmeal was completely replaced by a mixture of brewer’s yeast, chicken viscera and maggots. These foods were tested on Clarias gariepinus post-larvae with an initial average weight of 80 ± 1 mg. 1500 fish individuals were equally distributed in 15 concrete basins with a volume of 500 L forming five treatments in triplicate. Fish individuals were fed, manually at a ration rate of 20%, four times per day. The specific growth rates were 8.38%/day in imported food and 6.35%/day in the experimental food receiving 45.5% of protein from unconventional meal. Similar results were obtained with the feed consumption index. These encouraging results show that it is possible to partially or completely replace fishmeal in catfish feed and obtain an economically profitable production. The recovery of waste such as chicken viscera, brewer’s yeast and soybean meal in fish food formulation as tested in this study is a good contribution to environmental sanitation.展开更多
The main animal protein ingredient in fish diets is most often fishmeal because of its nutritional quality.However,the limited availability and increasingly cost of fishmeal has lead to investigations of either loweri...The main animal protein ingredient in fish diets is most often fishmeal because of its nutritional quality.However,the limited availability and increasingly cost of fishmeal has lead to investigations of either lowering or replacing the fishmeal content with more economic protein sources of animal and/or plant origin.The research for appropriate and cheap cost alternative sources of protein to use in commercial fish diets will be the most important factor in intensive fish culture development.Insect meals are healthy and nutritious alternatives to fish meal due to their rich nutritional values,particularly protein,fat and minerals.Housefly maggots(Musca domestica)meal is also rich in B complex vitamins,trace elements and phosphorus.From the results of previous studies,Housefly maggots meal can be used successfully to replace the fish meal portion partially or completely in the fish diets.Also,the results observed that not physiological stressful was introduced in the fish by feeding Housefly maggots meal diets.This indicates that Housefly maggots meal were well utilized by the fish thus resulting in good growth of fish.In other study,observed a best growth performance with fish feeding on diets containing maggot’s meal compared with fish feeding on fishmeal diet.This indicates the high nutritional quality and fish acceptance of maggot’s meal.展开更多
基金Supported by the College Project of Xuzhou Vocational College of Bioengineering(2014B07)
文摘Maggot meal was used to replace 0, 20% , 40% , 60% , 80% , 100% of the fish meal in the hasal feed, getting 6 kinds of feed with the same nitrogen content and equal energy （marked as group H0, H20, H40, H60, H80, H100）, which were used to feed the Misgurnus anguillicaudatus （loach） for60 d. The effects of the fish meal replacement by maggot meal on the growth performance of M. anguiUicaudatus were studied by comparing the growth performances and body indica- tors of M. anguillicaudatus fed with different feed groups. The results showed that the final weight, weight gain rate, specific growth rate of the M. anguillicaudatus in group H40 showed no significant difference with the control P 〉0.05 ）, but was significantly higher than that of other groups P 〈0.05 ）. Moreover, except group H40, the feed coefficients of all other groups were significantly higher than that in control group （P 〈0.05 ）. The M. anguillicaudatus in group 1-140 had the highest condition factor and COR and the lowest viscera index, all of which showed significant differences with the other replacement groups （P 〈0.05） but the difference with the control group was not significant （P 〉 0.05）. Thus, a proportion of 40% of the fish meal replaced with maggot meal in the mixed feed for the M. anguilli- caudatus could improve the growth performance and physique indexes of M. anguillicaudatus.
文摘Poverty, inadequate dietary intake, and diseases are the major causes of malnutrition in Nigeria. Averagely, Nigerians consume about 5.5 g of animal protein per day which is low compared to the minimum of 30 g per person per day as recommended by Food and Agricultural Organization. The concept of household food security ensures that adequate food can be obtained, either through home production or purchases. Snail production is one of the means through which these ills could be eliminated. Protein deficiency that is endemic in developing nations can be reduced through the domestication of micro-livestock like snail which is rich in protein and iron. Sixty Achatina achatina hatchlings were used in a 90 days feeding trial. The hatchlings were assigned to four treatments in a Completely Randomized Design with three replicates each. Maggot meal was incorporated at the levels of 0.6, 1.4, and 2 kg per 100 kg of feed in treatments 2, 3 and 4, respectively. Treatment 1 had no maggot meal and served as the control. Results showed that snail weight, shell length and shell width increased with increase in the levels of maggot meal. Hatchlings on T3 and T4 had statistically similar values （P 〉 0.01） which were significantly （P 〈 0.01） higher than values obtained for hatchlings on T1 and T2 .Weight gain and feed conversion values of hatchlings on T3 and T4 were also significantly higher than values observed for hatchlings on T1 and T2. Therefore, maggot meal could effectively replace fishmeal in the diet of African giant snail hatchlings.
文摘To reduce the pressure on aquatic resources due to the use of fishmeal in fish feed, the mastery and use of alternative sources of fishmeal in all stages of fish development are essential. Five diets including 4 experimental and one control diet were considered. Experimental diets of post-larvae were developed from unconventional ingredients in which fishmeal was completely replaced by a mixture of brewer’s yeast, chicken viscera and maggots. These foods were tested on Clarias gariepinus post-larvae with an initial average weight of 80 ± 1 mg. 1500 fish individuals were equally distributed in 15 concrete basins with a volume of 500 L forming five treatments in triplicate. Fish individuals were fed, manually at a ration rate of 20%, four times per day. The specific growth rates were 8.38%/day in imported food and 6.35%/day in the experimental food receiving 45.5% of protein from unconventional meal. Similar results were obtained with the feed consumption index. These encouraging results show that it is possible to partially or completely replace fishmeal in catfish feed and obtain an economically profitable production. The recovery of waste such as chicken viscera, brewer’s yeast and soybean meal in fish food formulation as tested in this study is a good contribution to environmental sanitation.
文摘The main animal protein ingredient in fish diets is most often fishmeal because of its nutritional quality.However,the limited availability and increasingly cost of fishmeal has lead to investigations of either lowering or replacing the fishmeal content with more economic protein sources of animal and/or plant origin.The research for appropriate and cheap cost alternative sources of protein to use in commercial fish diets will be the most important factor in intensive fish culture development.Insect meals are healthy and nutritious alternatives to fish meal due to their rich nutritional values,particularly protein,fat and minerals.Housefly maggots(Musca domestica)meal is also rich in B complex vitamins,trace elements and phosphorus.From the results of previous studies,Housefly maggots meal can be used successfully to replace the fish meal portion partially or completely in the fish diets.Also,the results observed that not physiological stressful was introduced in the fish by feeding Housefly maggots meal diets.This indicates that Housefly maggots meal were well utilized by the fish thus resulting in good growth of fish.In other study,observed a best growth performance with fish feeding on diets containing maggot’s meal compared with fish feeding on fishmeal diet.This indicates the high nutritional quality and fish acceptance of maggot’s meal.
