COBIA (Rachycentron canadum)

phospholipids and total cholesterol (TC) levels, and the higher free cholesterol (FC) levelcontributed to the TC level. However, the fish fed PL exhibited a significantly decreased plasmatriglyceride (TG) level. The lipoprotein fractions were also affected significantly by the PL. ThePL-supplemented diet groups had significantly higher high-density lipoprotein (HDL) comparedwith the PL-free diet group, but showed a marked decrease in very low-density lipoprotein (VLDL).The results suggested that PL could modify plasma lipoprotein metabolism and lipid profile, andthat the optimal dietary PL level may well exceed 80 g kg -1 for cobia larvae according to growthand survival.247. Ouyang, L. & Guo, X. (2009). Effects of temperature on the feeding and growth of fish. StudiaMarina Sinica, 49, 87-95.Temperature is the critical factor for feeding and growth of fish. Results of studies indicated that,under different temperature, some parameters, such as food consumption (C), specific growth rate(SGR) and ecological conversion efficiency (Eg) changed remarkably. Different fish species haddifferent responsive model to temperature. This paper introduced that the relationship betweentemperature and growth and feeding of some fishes, including Atlantic cod (Gadus morhua), seabass (Dicentrarchus labrax), Northern pike (Esox lucius), arctic charr (Salvelinus alpinus), cobia(Rachycentron canadum), turbot (Scophthalmus maximus), and so on, which were studied for a longtime in abroad. At the same time, at home, some researchers had found out some rules in theirworks. Many rules could be described as equations. These researches have very importantsignification on assessment of fishery resources and aquaculture.248. Qiao, Y.G., Tan, B.P., Mai, K.S., Ai, Q.H., Zhang, W.B. & Xu, W. (2013). Evaluation of ironmethionine and iron sulphate as dietary iron sources for juvenile cobia (Rachycentron canadum).Aquaculture Nutrition, 19(5), 721-730.An 8-week experiment was designed to determine the optimum dietary iron requirement of juvenilecobia Rachycentron canadum (mean initial weight, 15.89 ± 0.84 g) with iron sulphate(FeSO 4·7H 2 O) and iron methionine (FeMet) as iron sources, using a semi-purified diet based oncasein and white fish meal as the protein sources. The basal diet was supplemented with 0, 30, 60,120, 240 and 480 mg iron kg -1 dry diet from either FeSO 4 or FeMet, respectively. Survival was notsignificantly affected by the all dietary treatment. Weight gain (WG), feed efficiency (FE), serumcatalase activity (SCAT), and haemoglobin were significantly affected by any of the dietarytreatments from both of two iron sources. Based on broken-line regression analysis of WG, FE andSCAT, a minimum requirement for dietary iron was recommended to be 80.5-94.7 mg kg -1 fromFeSO 4 and 71.3-75.1 mg kg -1 from FeMet. Iron supplement to the basal diet had no significanteffect on haematocrit, erythrocyte count, iron concentration in whole body and fillet. Ourexperiment also showed that the bioavailability of FeMet and FeSO 4 to juvenile cobia was similarfor WG and FE, and the relative bioavailability of FeMet and FeSO 4 to juvenile cobia was 275% formaximum SCAT.249. Ren, M., Ai, Q. & Mai, K. (2014). Dietary arginine requirement of juvenile cobia (Rachycentroncanadum). Aquaculture Research, 45(2), 225-233.A 9-week feeding trial was conducted to estimate the dietary requirement of arginine in juvenilecobia in indoor flow-through and aerated aquaria. Six isonitrogenous and isoenergetic practicaldiets were formulated to contain graded levels of arginine ranging from 1.76% to 3.75% (dryweight) at about 0.4% increments replaced by equal proportions of glycine. Survival was notsignificantly different among dietary treatments. Specific growth rate (SGR) and feed efficiencyratio (FER) increased with increasing dietary arginine up to the 2.96% diet (P