Changes of phosphorus absorption from several feed ingredients in rainbow trout during growing stages and effect of extrusion of soybean meal+

Abstract

The absorption of phosphorus (P) contained in several feed ingredients by rainbow trout was compared during the growing stages of the fish. The ingredients tested were pollock meal, sardine meal, poultry feather meal (PFM), meat and bone meal (MBM), defatted soybean meal (SBM), soy protein concentrate (SPC), corn gluten meal (CGM), and defatted soybean meal extruded at 150°C (exSBM). Phosphorus absorption was determined for fish of sizes 2 g, 5 g, 10 g, 20 g, 50 g, 100 g, and 200 g. Absorption of P from the two fishmeals slightly decreased as bodyweight increased. Conversely, P absorption from PFM and the plant ingredients was very low by the 2 g fish, but increased during the early growth stages and seemed to have reached a plateau in fish bigger than 10 g. Absorption from exSBM was much higher than that from SBM at all bodyweights examined. Phosphorus absorption from the different ingredients were: pollock meal 31–46%; sardine meal 49–59%; MBM 36–46%; PFM 36–84%; SBM 3.4–37%; exSBM 25–58%; SPC 3.7–34%; and CGM, 0–17%. The results demonstrate that, depending on the ingredient P absorption in rainbow trout changes as the fish grows. Extrusion cooking at 150°C improved the availability of P in SBM.

Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus

“…The difference is probably due to fish species, fish size, diet composition, phosphorus sources and culture system (Schwarz, 1995;Shearer, 1984Shearer, , 1995Shearer, , 2000El-Zibdeh et al, 1995b;Riche and Brown, 1999;Avila et al, 2000;Lall and Vielma, 2001;Satoh et al, 2002). On the other hand, the difference is also due to the response criteria and statistical method/model employed in these studies ( Figs.…”

Soy Protein Concentrate as an Alternative Ingredient in Florida Pompano (Trachinotus carolinus) Diets

“…Phosphorus is an essential macro mineral in fish diets. Its deficiency causes poor growth and bone deformities, and in excess it inhibits zinc utilization (Satoh et al 2002).…”

“…However, higher inclusions of soy products may be limited by low availability of other nutrients such as methionine (Perkins 1995) and phosphorus (Satoh et al 2002). Phosphorus is an essential macro mineral in fish diets.…”

FLUCTUATION OF POST-PRANDIAL PLASMA MINERAL LEVEL OF JUVENILE JAPANESE FLOUNDER, Paralichthys olivaceus FED DIETARY PHOSPHORUS AND PHYTASE SUPPLEMENTATION

“…Satoh et al (2002) reported that in rainbow trout, P absorption from fishmeal decreased slightly as body weight increased. This was in contrast to P curred at 8-h post-feeding and tended to exceed the effect of feeding control IP diet.…”