Effects of replacing fishmeal with different cottonseed meals on growth, feed utilization, haematological indexes, intestinal and liver morphology of juvenile turbot (Scophthalmus maximusL.)

Abstract

A ten-week feeding trial was conducted to evaluate the effect of replacing fishmeal with two differently processed cottonseed meals (CSM), namely XC and SC, separately in turbot (5.28 ± 0.02 g). Nine isonitrogenous and isoenergetic diets were formulated without fishmeal replacement (FM), 150 g/kg (XC15, SC15), 250 g/kg (XC25, SC25), 350 g/kg (XC35, SC35) and 450 g/kg (XC45, SC45) of fishmeal replaced by CSM.Fishmeal was successfully replaced by XC in turbot diets without growth reduction at 350 g/kg, but not by SC even at 150 g/kg. The apparent digestibility coefficients of SC-included diets were significantly lower than XC-included diets at same replacement level. The activities of aspartate aminotransferase and superoxide dismutase were significantly affected in XC45 and SC45 group. The XC45 and SC-included diets caused shortened distal intestine villi height and structural damage of liver compared with FM diet. This study indicated that different processing methods could affect the nutritional value of CSM and effect as a protein source for turbot. CSM with high quality could be an important alternative dietary protein source for juvenile turbot. K E Y W O R D Sapparent digestibility coefficients, cottonseed meal, growth performance, haematological, intestinal and liver morphology, turbot

Effects of High Dietary Levels of Cottonseed Meal and Rapeseed Meal on Growth Performance, Muscle Texture, and Expression of Muscle‐Related Genes in Grass Carp

“…), and juvenile Turbot (Bian et al. ). The reason for this may be the lack of essential amino acids, especially methionine and lysine, which not only directly participate in protein synthesis but also regulate the metabolism of aquatic animals (Hansen et al.…”

“…), and Turbot Scophthalmus maximus (Bian et al. ). Furthermore, RSM has been added to diets for Rainbow Trout (Burel et al.…”

The effects of different fishmeal level diets with or without phytase supplementation on growth performance, body composition, digestibility, immunological and biochemical parameters of juvenile hybrid sturgeon ( Acipenser baeri Brandt ♀ × A. schrenckii Brandt ♂)

“…In recent years, a significant amount of research has been conducted on the replacement of fishmeal by different plant protein. The suitability of this replacement in terms of growth performance has resulted to be highly variable among fish species and experimental conditions (Bian et al, ; Cao et al, ; Ren et al, ; Sitjà‐Bobadilla et al, ). In the present study, the main growth performances SGR, WGR, FI and FCR were not significantly different in four treatments ( p > .05).…”

Effect of dietary inclusion of cottonseed meal on growth performance and physiological and immune responses in juvenile grass carp, Ctenopharyngodon idellus

“…Cottonseed meal (CSM) has a high‐protein content and relatively low price, and it has been assessed as a substitute for fishmeal for many fish species, such as rainbow trout, Oncorhynchus mykiss (Cheng & Hardy, ; Rincharda et al, ); channel catfish, Ictalurus punctatus (Barros, Lim, & Klesius, ; Robinson & Brent, ); blunt snout bream, Megalobrama amblycephala (Zhou et al, ); turbot, Scophthalmus maximus L. (Bian et al, ); and so on. These results have indicated that CSM could be used as a protein source, but usage was limited due to the potential toxic effects of free gossypol and low EAA, such as Lys, Met, Thr and the three branched‐chain amino acids (Cheng & Hardy, ; El‐Saidy & Gaber, ).…”