Effects of protein replacement in fishmeal by beans of Mucuna (Mucuna pruriens) in different percentages on growth of white shrimp (Litopenaeus vannamei)

• Main Authors: Giovana Patricia Tang Chau, 唐喬娜
• Other Authors: Fan-Hua Nan
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/26258213588181184446

碩士 === 國立臺灣海洋大學 === 水產養殖學系 === 96 === The increasing economical and environmental concerns regarding the use of fish meal in diets for aquaculture have led to the development of replacement strategies in which plants are seen as a reliable source of lower production costs. This study evaluated a fish meal replacement strategy using a plant protein source in treatment diets for marine white shrimp Litopenaeus vannamei. The use of mucuna beans was evaluated as a replacement for fish meal in practical diets. Animal protein was replaced with 0%, 25%, 50%, 75% and 100% of mucuna beans meal respectively. Post larvae of Litopenaeus vannamei were reared indoors. Each treatment had a replicate containing groups of 24 shrimps (100/m2) per aquarium arranged in a completely randomized design. Shrimps initial mean weight ranged from 1.37 ± 0.09 and 1.41 ± 0.17. The shrimp were hand fed twice daily at 08:00 and 20:00 for 70 days. The results showed that mucuna bean is a good alternative source for protein in white shrimp diets and can replace fish meal in levels from 25 % to 50 %. The results also showed no significant different effect in weight gain, feed conversion ratio (FCR) and survival rate. From the economic point of view, the partial gross returns for the protein source were compared simulating a 1 hectare culture of white shrimp and using results from the treatment diets that showed no significant differences among them according to final mean weight. The results showed that as more mucuna was replaced on every diet, the protein costs were lowered, but control diet had an increased partial gross return of NT$ 260 673.47 compared to the 25% replacement with NT$ 198 897.26 and the 50% mucuna had NT$ 184 153.84. According to these results we can have a good usage of the mucuna beans in replacement of the fishmeal especially from the economic point of view since we can reduce the price of the feed, which is the major cost in the culture of most aquatic species and in this case in the white shrimp culture. In conclusion, the replacement of fish meal with mucuna beans as a plant protein source in white shrimp practical diets is feasible. Keywords: Litopenaeus vannamei; Mucuna pruriens; Fish meal; Shrimp Nutrition