Evaluation of two shrimp by-product meals as protein sources in diets for Penaeus vannamei
1993; Elsevier BV; Volume: 115; Issue: 1-2 Linguagem: Inglês
10.1016/0044-8486(93)90358-6
ISSN1873-5622
AutoresLucía Elizabeth Cruz‐Suárez, Denis Ricque-Marie, Jose Arturo Martínez-Vega, Pedro Wesche-Ebeling,
Tópico(s)Crustacean biology and ecology
ResumoShrimp by-product meals from the Mexican Gulf coast (heads and hulls) (GM) and from the Pacific coast (heads) (PM) were prepared and evaluated as protein sources for juveniles of Penaeus vannamei (0.209 g average weight, 0.012 s.d.). Fish meal and soybean meal in the control diet were replaced by the shrimp by-product meals to obtain isoproteic and isolipidic diets. The shrimp by-product meals were included at dietary levels of 3, 6 and 18%. Each diet (control, PM3, GM3, PM6. GM6, PM18, GM18) was tested in three replicate groups of 15 shrimp during a 28-day ad libitum feeding study. Survival rates ranged from 96 to 98%, and growth rates of shrimp fed the diets were about 360% for the control and 3% level diets, 500% for the GM6 and PM6 diets, 590% for diet GM18 and 730% for diet PM18. A highly significant correlation between the final weights and shrimp by-products meal dietary levels (P<0.001) indicated a positive dose-response relationship. Final weights were significantly higher for shrimp fed the 6% dietary levels than those fed the control and 3% diets. At the 18% level, PM performed better than GM (P<0.05), probably due to a better source or process. Feed conversion improved from about 2.1 for the control and 3% diet groups to 1.3 for the PM18 fed group. The improvement in feed conversion compensated for the increase in cost of the diets due to the use of shrimp by-product meal, and resulted in a 36% lower contribution of feed ingredients in the shrimp production cost.
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