Table 3.2. Apparent protein and energy digestibility coefficients of major protein feed ingredients in sea-bass diets (from Williams et al., 1998).

The nutrient requirements (proteins and amino acids, energy, lipids and fatty acids, carbohydrates, vitamins, and minerals), practical diets (fry and fingerling diets, foodfish diets, broodfish diets, winter diets, medicated diets, and all plant diets) and feeding practices (feeding allowance/feeding rates, feeding methods, feeding frequency, feeding schedule, winter feeding, feeding diseased fish and feeding caged fish) of channel catfish are discussed.

Five (GT./ CA)n microsatellite loci were isolated from a size-selected genomic library of red sea bream (Paqrus major). Primers for PCR amplification were constructed for the microsatellite loci and the loci characterized by screening polymorphisms in three wild populations of the red sea bream. All loci displayed a high degree of length polymorphism, as observed in the total number of alleles per lo cus (16-32), and a high degree of heterozygosity ranging from 0.675-0.907. Distinct differences were ob served among three wild populations of red sea bream collected from coastal waters of Japan, both in the average number of alleles per locus and the frequency distributions of the alleles. The primers developed for red sea bream were also tested for their ability to amplify homologous sequences from 5 closely related species of Sparidae. These microsatellite loci show great potential as indicators for genetic variability and divergence among subpopulations of Pagrus major, and to a lesser degree with some of the related species tested.

The nutrient requirements (protein and amino acids, lipids and fatty acids, carbohydrates, and vitamins and minerals), practical diets (larval diets, juvenile and grow-out stages, and broodstock diets) and feeding practices of European sea bass are discussed.

The practical diets and feeding practices for, as well as nutrient requirements of Micropterus salmoides are presented and discussed in this chapter.

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This study was performed to evaluate mineral contents of catfish Silurus asotus. As a result of mineral content, the mean content of the macro mineral was (in descending order): K (310.36-412.66 mg/100 g), P (186.42-223.02 mg/100 g), Na (35.32-57.87 mg/100 g), Mg (22.88-31.87 mg/100 g), Ca (9.05-13.07 mg/100 g). In comparison, the mean content of the micro mineral was (in descending order): Fe (0.26-0.95 mg/100 g), Zn (0.26-1.02 mg/100 g), Cu (ND-0.08 mg/100 g), Mn (0.01-0.03 mg/100 g). A proportion of mineral intakes with the dietary reference intakes for Koreans (KDRIs) set by the Korean Nutrition Society. Nutrient uptake proportion of mineral intakes was (in descending order): P (62.16%), K (20.71%), Mg (16.82%), Fe (13.02%), Zn (11.38%) Cu (10.94%), Na (6.59%), Ca (3.09%), Mn (0.96%). The mineral content was compared with the major protein food sources according to the Korea Health Statistics (2013) such as polished rice, pork, chicken, beef, eggs and milk. The calcium content contains; lower level of milk and eggs, chicken whereas higher levels of rice, pork and beef. Catfish has less iron content than major protein food source. Phosphorus and potassium contain higher level of major protein food sources.