Dietary Protein Requirements of Juvenile Black Sea Bass, Centropristis striata

Abstract

A feeding trial was conducted in a recirculating system to determine the dietary protein requirement for juvenile black sea bass. Six isocaloric diets were formulated to contain varying levels of crude protein (CP) ranging from 36 to 56% (36, 40, 44, 48, 52, and 56%) by substituting a mixture of carbohydrates and lipid for fish meal. The feeding experiment was carried out in 18‐75 L aquaria stocked at a density of 15 juveniles (initial average weight 6.7 g) per tank. Fish were fed test diets in triplicate tanks to apparent satiation twice a day for 8 wk. Whole‐body proximate composition was analyzed after the feeding trial. After the feeding trial, weight gain and specific growth rate of fish fed the 44% CP diet were not significantly different from those fed the 48, 52, and 56% CP diets, but were significantly higher (P < 0.05) than those fed the 36 and 40% CP diets. Feed conversion efficiency and protein efficiency ratio were significantly affected by dietary protein level. The dietary requirement of protein for maximum growth of black sea bass juveniles, estimated using broken‐line regression analysis on weight gain, was 45.3% and maximum weight gain occurred at 52.6% based on polynomial regression analysis.

Growth performance, digestive enzyme, transaminase and GH-IGF-I axis gene responsiveness to different dietary protein levels in broodstock allogenogynetic gibel carp (Carassius auratus gibelio) CAS III

“…The dietary protein level in the present study may not be high enough to retard growth, but PRE, the indicator to reflect the protein utilization, decreased when protein overabounded. This supported the observations in black sea bass (Shah Alam et al, 2008), giant croaker (Lee et al, 2001), and Murray cod Maccullochella peelii (Gunasekera et al, 2000). But in some other studies such as silver perch (Yang et al, 2002) and Jian carp (Liu et al, 2009), PRE tended to decrease with increasing dietary protein levels.…”

“…Changes in whole body composition including protein, lipid and moisture in the present study were consistent with those found in giant croaker Nibea japonica (Lee et al, 2001) and black sea bass Centropristis striata (Shah Alam et al, 2008). But these disagreed with other species such as silver perch (Yang et al, 2002), hybrid Clarias catfish Clarias batrachus × Clarias gariepinus (Giri et al, 2003), and spotted barbel Hemibarbus maculates (Chen et al, 2010).…”

Optimal dietary protein to energy ratio for juvenile peanut worm Sipunculus nudus Linnaeus

“…Similar results have been reported for other aquatic animals, such as abalone Haliotis midae [59], Cyprinus carpio [60], Channa striata [61], Scortum barcoo [51], and Acipenser persicus [62]. However, several researchers have found that carcass protein content is not affected by the dietary protein level [63][64][65]. Again, these inconsistent findings may be due to differences in the protein levels, protein sources, experimental species, and culture conditions used in the studies.…”

A transdisciplinary approach to the initial validation of a single cell protein as an alternative protein source for use in aquafeeds

“…Core gut microbial composition of 12 smallmouth grunt ( H. chrysargyreum ) exposed to four experimental feeds ( N  = 3 per feed) used to test KnipBio single cell protein (KnipBio meal; KBM) as a fishmeal substitute, where GRU-C1m GRU nt C ontrol feed (modelled after Alam et al, 2012; Alam, Watanabe & Carroll, 2008; Alam et al, 2009), GRU-C2, GRU-C1 with 80 ppm carotenoid addition, and GRU-KL and GRU-KH are control feed with fishmeal replaced with KBM; KL, K nipBio meal L ow (10% replacement) and KH, K nipBio meal H igh (50% replacement). Numbers above bars indicate the proportion of the microbiome represented by the six core groups ( N  = 6).…”