Soy protein concentrate as a protein source for Senegalese sole (Solea senegalensisKaup 1858) diets: effects on growth and amino acid metabolism of postlarvae

Abstract

The objective of this work was to evaluate the e¡ect of a dietary amino acid imbalance, originating from the use of a soy protein concentrate (SPC) as the major protein source, on the growth performance and amino acid metabolism of Senegalese sole (Solea senegalensis) postlarvae. Senegalese sole (85.6724.6 mg wet weight) were fed one of two experimental diets: one based on ¢sh meal (FM) and another based on SPC. Diets were isonitrogenous (around 56% crude protein) and isoenergetic. Diet acceptability was very good and the growth rate was 6.9% day À 1 for sole eating the FM diet and 6.0% day À 1 for sole eating the SPC diet. Mass-speci¢c ammonia excretion and the activities of selected amino acid metabolic enzymes (ALAT, ASAT and GDH) did not present signi¢-cant di¡erences between treatments, although this may have been due to the high variability found for these parameters in the SPC treatment. This variability may suggest di¡erent capacities of individual ¢sh to adapt to the possible methionine dietary de¢-ciency. The utilization of amino acids as a substrate for lipogenesis does not seem to be a¡ected by the dietary protein source, since NAPDH-generating enzymes (G6PD and ME) had similar activities in both treatments. Amino acid metabolism in Senegalese sole postlarvae seems to be slightly a¡ected by the dietary protein source. Nevertheless, the changes induced by the SPC diet do not seem to impair growth, at least at the high dietary protein level used in this experiment.

A nutrigenomic analysis of intestinal response to partial soybean meal replacement in diets for juvenile Atlantic halibut, Hippoglossus hippoglossus, L.

“…This result is in agreement with previous studies with Atlantic salmon (Hemre et al, 1995;Heikkinen et al, 2006;Bakke-McKellep et al, 2007b), cod (Forde-Skjaervik et al, 2006), sea bass (Tibaldi et al, 2006), Egyptian sole (Bonaldo et al, 2006), channel catfish, Ictalurus punctatus (Evans et al, 2005), Japanese flounder (Kikuchi, 1999;Choi et al, 2004), Senegalese sole, Solea senegalensis (Aragão et al, 2003), and turbot, Scophthalmus maximus (Day and Gonzalez, 2000) where no significant changes in growth were detected over the trial periods.…”

The Utilization of Soybean Meal in Formulated Diet for Marble Goby, Oxyeleotris marmoratus

“…Moreover, the fish used in this feeding trial is relatively smaller (0.28 g) and may be more sensitive to the anti-nutritional factors that present in the soybean meal-based diet. This is in agreement with studies on Senegalese sole, Solea senegalensis (Aragão et al, 2003) and gilthead sea bream, Sparus aurata (Venou et al, 2006).…”

First results on spawning, larval rearing and growth of the wedge sole (Dicologoglossa cuneata) in captivity, a candidate species for aquaculture

“…Recent knowledge concerning these species in captivity is indispensable for developing effective farming on an industrial scale M. Herrera (&) Á I. Hachero Á M. Rosano Á J. F. Ferrer Á J. M. Márquez Á J. I. Navas IFAPA Centro ''Agua del Pino'' (Junta de Andalucía), Ctra. Punta Umbría-Cartaya, 21450 Cartaya, Huelva, Spain e-mail: marcelino.herrera.ext@juntadeandalucia.es (Aragão et al 2003;Imsland et al 2004;Anguis and Cañavate 2005;Morais et al 2005;Villalta et al 2005;Cañavate et al 2006).…”