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  • Title: Nutritional value of fish meals in the diet for young pigs.
    Author: Kim SW, Easter RA.
    Journal: J Anim Sci; 2001 Jul; 79(7):1829-39. PubMed ID: 11465370.
    Abstract:
    A series of three experiments was conducted to evaluate the nutritional value of fish meals as protein sources in young pigs' diets. Four fish meals (menhaden; mackerel, dried at 85 degrees C and 70 degrees C; and herring, dried at 70 degrees C) were tested. For the first experiment, eight pigs (2 wk old) were surgically fitted with ileal cannulas and used to measure apparent digestibility of the fish meals over the age period of 3 to 7 wk. Compared with menhaden fish meal, mackerel and herring fish meals yielded higher (P < 0.05) ileal digestibility values for threonine, serine, alanine, valine, histidine, lysine, and arginine and also for the average of all amino acids. Ileal digestibility was increased (P < 0.05) as pigs grew. For the second experiment, four different diets each containing different fish meals were fed to 120 pigs to evaluate growth performance over the age period of 3 to 7 wk. Average daily gain was higher (P < 0.07) in pigs fed diets containing either mackerel or herring fish meal than in pigs fed menhaden fish meal during 3 to 5 wk of age and was highest (P < 0.07) in pigs fed a diet containing mackerel fish meal during 5 to 6 wk of age. Gain/feed was higher (P < 0.05) in pigs fed diets containing mackerel and herring fish meals than in pigs fed menhaden fish meal. Mackerel dried at 70 degrees C showed the highest value from the previous two experiments and was chosen to measure the relative bioavailability in comparison to spray-dried porcine plasma. A classical slope-ratio design was used to measure relative bioavailability of mackerel fish meal compared to porcine plasma protein. This study showed that mackerel dried at 70 degrees C can replace spray-dried porcine plasma with the same bioavailability during d 17 to 29 postpartum with additional crystalline lysine and amino acid supplementation to match amino acid profile of the spray-dried porcine plasma.
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