Development of growth rate, body lipid, moisture, and energy models for white sturgeon ( Acipenser transmontanus ) fed at various feeding rates

Abstract

The objectives were to develop and evaluate: 1) growth rate models, 2) body lipid, moisture, and energy models for white sturgeon fed at various feeding rates (FR; % body weight [BW] per day) and then evaluate responses at proportions of optimum feeding rate (OFR) across increasing BW (g). For objective 1, 19 datasets from the literature containing initial BW, FR and specific growth rate (SGR; % BW increase per day) were used. For objective 2, 12 datasets from the literature (11 from objective 1) containing SGR, FR, final BW, body lipid (%), protein (%), ash (%), moisture (%), and energy (kJ/g) were used. The average rearing temperatures was 19.2 ± 1.5 °C (mean ± SD). The average nutrient compositions and gross energy of the diets were 45.7 ± 4.3% protein, 14.8 ± 3.2% lipid, and 20.4 ± 1.3 kJ/g, respectively. The logistic model was used for objectives 1 and 2 to develop a statistical relationship between SGR and FR, then an iterative technique was used to estimate OFR for each dataset. For objective 2, the statistical relationship between body lipid, energy, and moisture and FR was established. Using the OFR estimate, SGR, body lipid, energy and moisture were computed at various FR as a proportion of OFR. Finally, a nonparametric fitting procedure was used to establish relationships between SGR, body lipid, energy and moisture (responses) compared with BW (predictor) at various proportions of OFR. This allows visualization of the effect of under- or over-feeding on the various responses. When examining the differences between OFR at 100% and various proportions of OFR, SGR differences decrease and moisture differences increase as BW increases. Lipid and energy differences decrease as BW increases. To our knowledge, these are the first description of changes in nutrient compositions when white sturgeon are fed at various FR. Because physiological and behavioral properties that are unique to sturgeon, results from this study are specific to sturgeon under the conditions of this study and cannot be compared directly with salmonids even if some of the results are similar. This research provides insight to designing future nutritional studies in sturgeon.

A comparison of one‐slope straight broken‐line, two‐slope straight broken‐line, quadratic broken‐line and quadratic models to estimate an accurate optimum feeding rate for juvenile olive flounder ( Paralichthys olivaceus )

“…This can be comparable to results reported in other fish species such as white sturgeon ( Acipenser transmontanus ; Hung & Lutes, ; De Riu et al, ), green sturgeon ( A. medirostris ; Zheng, Deng, De Riu, Moniello, & Hung, ), lake sturgeon ( A. fulvescens ; Lee, Zhao, et al, ), striped bass (Hung et al, ) and grass carp ( Ctenopharyngodon idellus ; Li et al, ). Because body weight changes are highly associated with nutrient gains or losses (Dumas, de Lange, Farance, & Bureau, ; Lee, Sonmez, Hung, & Fadel, ), the increased protein and lipid gains as the feeding rate increased were in line with what the growth responses were observed in both of the trials.…”

Dietary choline requirement of juvenile olive flounder (Paralichthys olivaceus)

“…Because growth is closely correlated with nutrient accumulation in fish body (Dumas, Lange, France, & Breau, ; Lee, Sonmez, Hung, & Fadel, ), the pattern of change in the protein and lipid contents of the flounder responding to the graded choline levels was in line with what the growth response exhibited. This is in agreement, in part, with previous results reported in white sturgeon (Hung, ), yellow perch (Twibell & Brown, ) and grouper (Qin et al, ), exhibiting that the whole‐body fat content was responsive to the respective dietary choline level.…”

Dynamics of growing of Russian sturgeon (Acipenser gueldenstaedtii) larvae for different durations of cultivation

“…This has led to an increase in the pressure of food competition and, as a result, to a decrease in the output of young sturgeon growing up. At the same time, it was shown that with an increase in the growing period, moisture in sturgeon muscles decreases and fat and protein increase (Poleksic et al, 2010;Memis et al, 2011;Kairullaev et al, 2017;Lee et al, 2017). Corresponding age-related changes have been studied in other fish species (Volichenko et al, 2017;Payuta & Flerova, 2020).…”