Effect of probiotic on larvae shrimp (Penaeus vannamei) based on water quality, survival rate and digestive enzyme activities

https://krishi.icar.gov.in/jspui/bitstream/123456789/1601/1/317-2014%20-%20Shyne%20Biofloc%20dietary%20supplementation%20%281%29%20%281%29.pdf

Effect of dietary supplementation of biofloc on growth performance and digestive enzyme activities in Penaeus monodon

Usage of energy reserves in crustaceans during starvation: status and future directions.

Effect of short-term starvation on hepatopancreas and plasma energy reserves of the Pacific white shrimp (Litopenaeus vannamei)

Evaluation of black soldier fly (Hermetia illucens) larvae meal as partial or total replacement of marine fish meal in practical diets for Pacific white shrimp (Litopenaeus vannamei)

A study was conducted to evaluate variations of digestive enzyme activities in Litopenaeus vannamei (Boone) reared in commercial ponds under semi-intensive conditions. Shrimp were collected at each body weight increase of 2 g. As the shrimp grew (2^12 g), signi¢cant increases in the activities of lipase and chymotrypsin were observed. The total protease activity decreased from 6 g onwards. Trypsin activity showed a peak at 6 g and amylase activity increased two-fold after 2 g. Additionally, the stomach contents were analysed microscopically for shrimp between 2 and 10 g. Plant matter contributed above 30% of the total stomach content in 6-, 8- and 10-g shrimp. Detritus represented 58% and 62% of the total stomach content in 2- and 4-g shrimp, respectively, decreasing to 33^43% at greater shrimp weights. Arti¢cial feed showed a maximum contribution of 20% in 6-g shrimp. The present results show changes in the enzyme activity after the shrimp reach 6 g in body weight, evidenced by a decrease in total protease and an increase in lipase and amylase activities. The amylase/protease ratio was 2.6 in 2-g shrimp and increased steadily to 9.6 in 12-g shrimp. These ¢ndings suggest an adaptation of the enzymatic activity to diets with lower protein content as body weight increases, and may be related to the variation of the diierent items found in the stomach.

/pdf/digestive-enzyme-activity-and-food-ingesta-in-juvenile-ep3rl69ivk.pdf

Digestive enzyme activity and food ingesta in juvenile shrimp Litopenaeus vannamei (Boone, 1931) as a function of body weight

A combination of barley-based fermented grains (BFG) and wheat gluten (WG) meal (1:1 on a crude protein basis) was evaluated as an alternative protein-rich ingredient (BFG^WG) in diets for juvenile Litopenaeus vannamei. Four isocaloric diets were formulated to contain 44% protein in which protein from BFG^WG replaced 0% (A), 33% (B), 66% (C) and 100% (D) of the protein from marine animal protein (MAP:69% shrimp head meal, 21% ¢sh meal and10% squid meal) in the diets. These diets were delivered twice a day for 6 weeks to shrimp (initial weight � standard error, 2.14 � 0.02 g). Shrimp fed diets A (control) and B showed similar weight gain at the end of the experiment. There were no significant differences among the survival rates of different dietary treatments (496%). The amount of uneaten food was positively and significantly (r 2 50.57, Po 0.001) related to the level of inclusion of BFG^WG in the diets, suggesting that diet palatability was a major factor in£uencing shrimp growth. Diet D had the highest apparent digestibility for protein and dry matter. The inclusion of BFG^WG had a positive effect (r 2 50.75, Po0.05) on carbohydrate digestibility. A significant stimulation of amylase activity and soluble protein and glycogen concentrations in the hepatopancreas also was related to the amount of BFG^WG in the diet. Feed conversion ratio and protein ef¢ciency ratio were not significantly different among diets containing substitution levels of 0%, 33% and 66% of MAP, which could suggest that if the balance of amino acids and the palatability in the diet can be improved, replacement level of the MAP may be increased to 66% without reducing growth.

/pdf/use-of-a-mixture-of-barley-based-fermented-grains-and-wheat-2l65alh66t.pdf

Use of a mixture of barley-based fermented grains and wheat gluten as an alternative protein source in practical diets for litopenaeus vannamei (boone)

En un cultivo semi-intensivo de camarones, las apropiadas practicas de manejo delalimento para la etapa de engorde pueden minimizar los costos de produccion, disminuir elimpacto ambiental, incrementar la produccion de camarones y maximizar los beneficioseconomicos. El consumo de alimento artificial por parte de los camarones cambiaconsiderablemente como resultado de la intensidad de luz, calidad del agua y suelos delestanque, disponibilidad de alimento natural, hora del dia, estadio de muda y tamano delcamaron. La alimentacion en base a porcentajes de la biomasa estimada presente en elestanque no considera ninguno de los factores mencionados anteriormente excepto el pesodel camaron. El presente trabajo resume los estudios realizados en Litopenaeus vannameien Ecuador, relacionados al efecto que tiene el ritmo circadiano, el ciclo de muda y la talladel camaron en la actividad de las enzimas digestivas y como ellas inciden en el consumo yaprovechamiento del alimento.

/pdf/estrategia-de-alimentacion-de-acuerdo-a-la-demanda-5210a9qvio.pdf

César Molina-poveda

Papers

Digestive enzyme activity and food ingesta in juvenile shrimp Litopenaeus vannamei (Boone, 1931) as a function of body weight

Use of a mixture of barley-based fermented grains and wheat gluten as an alternative protein source in practical diets for litopenaeus vannamei (boone)

Estrategia de Alimentación de Acuerdo a la Demanda Fisiológica del Juvenil Litopenaeus vannamei (Boone)

Feeding frequency effect on water quality and growth of Litopenaeus vannamei fed extruded and pelleted diets