Total and Partial Substitution of Dietary Fish Oil with Palm Oil to Juvenile Crayfish, Procambarus Llamasi

Abstract

A 12-week feeding study was carried out to establish the effect of partial or total substitution of fish oil by plant oil in experimental fed diets in crayfish juveniles (Procambarus llamasi). Three isonitrogenous (30% crude protein) and isoenergetic (15.1 kJ/g) practical diets were formulated with 100% fish oil (FO), 100% plant oil (PO), and 50% FO-50% PO. The crayfish were raised on plastic tanks without water exchange, constant aeration, PVC shelters, with an average water temperature of 26 ± 1°C. Uneaten food and fecal residues were siphoned out from the tank bottom each morning. Crayfish total body weight (BW) and total length (TL) was measured every two weeks. Results showed that the use of plant oil did not significantly modified (p>0.05) growth performance, survival or maturity of experimental organisms. All diets were offered to apparent satiation twice a day. Fed was consumed showing good results in all performance growth parameters and maturity index. In conclusion the present study clearly supported the possibility of total or partial substitution of fish oil by plant oil for crayfish. Despite the absence of fish oil as attractant in the diet with 100% PO, its acceptance was as good as the one containing it. P. llamasi demonstrated the feasibility of using a vegetable oil as lipidic energy source, which allows lowering costs in the use of fish oil about 66%.

Effects ofPortulaca oleraceawhole diet on pigments and fatty acids profiles of juvenile red swamp crayfish (Procambarus clarkiiGirard, 1852) under laboratory conditions

“…Crayfish biometrics (length and weight) and growth parameters for each treatment were expressed as mean ± SD of the three replicates. Specific growth rate was calculated with the following formula (Carmona‐Osalde et al, 2015): …”

“…Rearing conditions were constant during the experiment: T 23.4 ± 2.0℃, pH 8.8 ± 0.3, DO 8.7 ± 0.3 mg × L −1 and ammonia 0.14 ± 0.1 mg × L −1 . The photoperiod was set at 12 h light and 12 h dark (Carmona‐Osalde et al, 2015). Some PVC tubes (Ø 6 cm) were placed inside the aquaria as shelters (Xiao et al, 2014).…”

Reduced protein intake in Procambarus clarkii fed diets containing graded levels of purslane: Effects on growth and quality

“…The water used in all the tanks (startup and makeup water) was kept for about 12 h at room temperature before use, to remove residual chlorine (Oliveira & Fabião, 1998). The tanks were equipped with a bio‐mechanical filter and aeration to maintain good water quality and high levels of dissolved oxygen (Carmona‐Osalde et al, 2015). All physical and chemical parameters were monitored every hour using a Seneye reef probe (Seneye Ltd., Norwich, UK).…”

“…The mean temperature of the tanks during the experiment was 22.3 ± 1.7°C and the mean pH was 7.6 ± 0.4, while the oxygen (mg × L −1 ) and ammonia (mg × L −1 ) concentrations were 8.8 ± 0.3 and 0.03 ± 0.0, respectively. The photoperiod was 12 h/12 h (light/dark) (Carmona‐Osalde et al, 2015; Xiao et al, 2014). PVC pipes (dia.…”

FIRST RECORD OF EPIBIONT Sigara sp. (Corixidae) IN CRAYFISH Procambarus (Austrocambarus) llamasi FROM SOUTHEASTERN MEXICO

“…In Mexico, the biology of Procambarus has been more studied than the biology of other Cambarids because of its diversity and potential use in aquaculture (Indy et al, 2010). These studies include fecundity, egg development and, growth of juvenile crayfish Procambarus (Austrocambarus) llamasi under laboratory conditions, the effect of density and sex ratio on gonad development and spawning and the growth of juvenile fed different farm and aquaculture commercial foods (Rodriguez-Serna, et al, 2000;Rodriguez-Serna et al, 2002;Carmona et al, 2004;Rodriguez-Serna et al, 2010;Carmona-Osalde et al, 2015).…”