title: Fish condensate as effective replacer of fish meal protein in diet for striped snakehead, Channa striata (Bloch).
abstract: The optimal protein replacement of fish meal (FM) by fish condensate (FC) was investigated in striped snakehead, Channa striata (Bloch) (1.78 ± 0.02 g initial weight). The FM-based diet (0FC) was replaced by substituting protein from FC for 100 (100FC), 200 (200FC), 300 (300FC), 400 (400FC), 500 (500FC) or 600 (600FC) g kg-1of the FM, and a commercial diet (CD) for carnivorous fish was included for comparison. The experiment was conducted indoors under completely randomized design (8 treatments × 3 replications × 60 fish per pond) over a 6-month trial. There were no significant differences in water quality during the experiment. The fish fed with 500FC had superior growth performance and feed utilization. This dietary treatment gave similar levels to all observed specific activities of digestive enzymes as did baseline 0FC. Survival, carcass composition, hematological parameters and liver histopathology were not negatively impacted by this protein replacement level. Economic analysis also supports the use of this by-product as a potent protein replacer in striped snakehead diet. Findings from the current study indicate that a 500 g kg-1protein replacement of FM by FC is near optimal for striped snakehead, and similar use of it in the aquafeed of other species appears worth further studies.
authors: Department of Fisheries Technology, Faculty of Sciences and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang, 92150, Thailand.
authors: Wattana
authors: W
authors: Wattanakul
authors: Department of Food Industry and Fisheries Products, Faculty of Sciences and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang, 92150, Thailand.
authors: Uraiwan
authors: U
authors: Wattanakul
authors: Department of Applied Science, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand. karun.t@psu.ac.th.
authors: Karun
authors: K
authors: Thongprajukaew
authors: Department of Biology, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand.
authors: Chutchawan
authors: C
authors: Muenpo
mesh_terms: D000818:Animals; D002918:Chymotrypsin / Q000032:analysis / Q000378:metabolism; D004032:Diet / Q000662:veterinary*; D004044:Dietary Proteins / Q000494:pharmacology*; D005396:Fish Products; D029941:Fish Proteins / Q000032:analysis / Q000378:metabolism; D007422:Intestines / Q000201:enzymology; D008099:Liver / Q000378:metabolism; D010473:Perciformes; D014357:Trypsin / Q000032:analysis / Q000378:metabolism
chemical_list: D004044:Dietary Proteins; D029941:Fish Proteins; D002918:Chymotrypsin; D014357:Trypsin
keywords: Channa striata; Fish condensate; Fish meal; Protein replacement; Striped snakehead