Effects of Dietary Calcium and Phosphorus on Growth, Food Conversion, Bone Ash and Hematocrit Levels of Catfish

Dietary phosphorus requirement of juvenile black seabream, Sparus macrocephalus

“…These signs have also been observed by Andrews et al (1973), Dove (1976), Ogino and Takeda (1976), Ketola (1975) and Watanabe et al (1980), in channel catfish, common carp and two species of salmon. In the present study, growth response, feed efficiency (FE) and protein efficiency ratio (PER) of juvenile black seabream were significantly improved by the supplementation of dietary available P. Weight gain was lower for fish fed with the basal diet due to insufficient phosphorus being available for growth after being allocated for utilization in other physiological processes (Brown et al, 1992).…”

Effect of different levels of phosphorus on growth and mineralization in African giant catfish <i>Heterobranchus bidorsalis</i> (Geoffrey Saint Hillarie, 1809)

“…This suggests that H. bidorsalis may have higher requirement than African catfish since it grows bigger and needs more P for growth and bone development. Wilson et al (1982);NRC (1983) and Lovell (1978) reported values of 0.42-0.50% P as the requirement for channel catfish (Ictalurus punctatus), while Andrews et al (1973) reported 1.50%. The differences between these values reported for channel catfish and that from the present study could be attributed to species differences.…”

“…The decrease in the weight gain and specific growth rate of the fish fed diets deficient in P is in line with the report of Lovell (1978) which described that dietary deficiencies in P caused reduction in growth rate, body content of Ca and P of the fish. Andrews et al (1973) also stated that channel catfish (Ictalurus punctatus) fingerlings fed low amount of P exhibited reduced growth, poor feed efficiency and low bone ash. In Chavez-Sanchez et al (2000) diet deficient in P resulted in reduced growth and high conversion ratio in American cichlid, Cichlasoma urophthalmus.…”

“…In Sakamoto and Yone (1980) high lipid was deposited in carp fed diet deficient in P. Similarly, Chavez-Sanchez et al (2000) reported inverse relationship between carcass lipid levels and dietary P. Increase in carcass ash as observed from the study supports the work of Chavez-Sanchez et al (2000) which explained that bone ash and scale mineralization in American cichlid are highly correlated with P level in the diet. Andrews et al (1973) determined that a P deficiency produced lower bone and ash in channel catfish while Ketola (1975) described that supplemeantary P in the diets significantly increased bone ash content in Atlantic salmon. Similarly, Watanabe et.…”

Fitase líquida em dieta extrusada para juvenis de tilápia do Nilo (<em>Oreochromis niloticus</em>)

“…Sci. Maringá, v. 29, n. 4, p. 449-455, 2007(Andrews et al, 1973Baeverfjord et al, 1998), piora na eficiência alimentar, baixa mineralização óssea (Vielma et al, 1998;Baeverfjord et al, 1998;Debnath et al, 2005b) e aumento do conteúdo de gordura na carcaça (Sakamoto e Yone, 1978). Vários estudos têm sido realizados para determinar os efeitos da suplementação da enzima fitase em dietas sobre o desempenho e a disponibilidade de fósforo e da proteína bruta.…”