Dietary available phosphorus requirement for juvenile gibel carp (Carassius auratus gibeliovar. CASIII)

Abstract

A 57-day growth experiment was conducted with juvenile gibel carp (13.48 AE 0.10 g) in a flow-through system to study the effect of dietary phosphorus on growth performance, body composition, nutrition utilization, phosphorus loading and enzymes activities. Seven semipurifed diets were formulated to contain 0.07 (the basal), 2. 27, 5.32, 8.10, 12.06, 15.24 and 19.48 g available phosphorus/kg diet.The results showed that specific growth rate, body length and feed efficiency significantly increased in the fish fed diets containing 0.07 to 15.24 g available P/kg diet (p < .05). Ash and P content increased in fish fed diets containing 0.07-12.06 P g/kg (p < .05) and then levelled off, while moisture, crude protein and lipid had no significant difference (p > .05). The protein retention efficiency increased in the fish fed with diets 0.07-5.32 g/kg P (p < .05) and then reached a plateau. The P content in faeces was higher in fish fed diets containing 15.24 and 19.48 g available P/kg. Total P concentration in tank water increased in fish fed 0.07-12.06 g available P per kg diet (p < .05). The plasma P was higher in the fish fed with 15.24 g available P/kg diet (p < .05), triglycerides was lower in the fish fed diet containing 15.24 and 19.48 g available P/kg (p < .05), no significant differences were observed in plasma Ca, plasma glucose and calcitonin (p > .05). Based on SGR, whole body P content and FE, dietary available P requirement for juvenile gibel carp were 13.37, 13.97 g/kg and 15.06 respectively. K E Y W O R D S growth performance, juvenile gibel carp, nutrition utilization, P loading, phosphorus wileyonlinelibrary.com/journal/are Aquaculture Research. 2018;49:1284-1292.

Dietary Phosphorus Requirement of Fingerling Indian Major Carp, Labeo rohita (Hamilton)

“…The improvement in PUE up to 6.5 g/kg and then decrease in PUE as observed in this study is in line with the results reported in previous studies (Nordrum et al 1997;Satoh et al 2003;Luo et al 2009Luo et al , 2010Xie et al 2017). However, fish fed lower and higher levels of dietary phosphorus than 6.5 g/kg showed lower PUE.…”

“…However, fish fed lower and higher levels of dietary phosphorus than 6.5 g/kg showed lower PUE. Similar to our study, Xie et al (2017) also reported a quadratic responses between the phosphorus retention efficiency and the dietary phosphorus levels in gibel carp. The improvement in PUE up to 6.5 g/kg and then decrease in PUE as observed in this study is in line with the results reported in previous studies (Nordrum et al 1997;Satoh et al 2003;Luo et al 2009Luo et al , 2010Xie et al 2017).…”

Responses of hybrid sturgeon ( Huso dauricus ♀ × Acipenser schrenckii ♂ ) to oral administration of phosphorus

“…The results indicated that the excessive amount of P intubation led to an increase in P excretion and prolonged P elimination time of hybrid sturgeon. The discharging of P due to the excessive P supplementation has been a big concern that contributed to the eutrophication of aquatic environments and consequently the deterioration of water quality (Rodehutscord et al, ; Xie et al, ). P waste excretion in fish is usually evaluated indirectly in nutrition study by assessing the digestibility of feed, which, however, could be affected by the faecal collection time and methods (Hua & Bureau, ), while the urine collection method in this study provides a possibility of evaluating P waste discharging directly and accurately in fish and a better understanding of P utilization in nutrition study.…”

“…Therefore, to minimize eutrophication of waterbody, aquafeeds should meet the P requirement of fish and avoid excess P contents in the diet at the meantime (Jokinen, Vielma, Aaltonen, & Koskela, ; Musharraf & Khan, ). The studies about P requirement and utilization have been largely reported in many fish species, such as large yellow croaker ( Pseudosciaena crocea R. ) (Mai et al, ), rainbow trout ( Oncorhynchus mykiss ) (Fontagné et al, ; Lellis, Barrows, & Hardy, ), juvenile black seabream ( Sparus macrocephalus ) (Shao et al, ), Africa catfish ( Heterobranchus bidorsalis ) (Nwanna, Adebayo, & Omitoyin, ), stinging catfish ( Heteropneustes fossilis ) (Zafar & Khan, ) and gibel carp ( Carassius auratus gibelio ) (Xie et al, , ), which, however, have rarely been studied in sturgeon.…”

“…and gibel carp (Carassius auratus gibelio) (Xie et al, 2017(Xie et al, , 2018, which, however, have rarely been studied in sturgeon.…”