The relationship of feed intake, growth, nutrient retention, and oxygen consumption to feed conversion ratio of farmed saltwater Chinook salmon (Oncorhynchus tshawytscha)

Elvy, Jordan E.; Symonds, Jane E.; Hilton, Zoë; Walker, Seumas P.; Tremblay, Louis A.; Casanovas, Paula; Herbert, Neill A.

doi:10.1016/j.aquaculture.2022.738184

Cited by 33 publications

(40 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They evaluate the effect of different commercial feeds on the growth of O. niloticus in the pond and found that the crude protein level of 30-32% in a fish feed shows a significant difference in weight gain, FCR and SGR. FCR is an essential tool for understanding feed quality, and lower FCR means better utilization of feed, which improves fish growth and muscle composition (Elvy et al, 2022). Calculating SGR is essential to know the feed effect on fish weight per day (Zhang et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of the haemato‐biochemical parameters and growth characteristics of Oreochromis niloticus (Nile tilapia) cultured under different feed and habitats (biofloc technology and earthen pond system)

Habib

Batool

Rehman

et al. 2022

Aquaculture Research

View full text Add to dashboard Cite

Assessing fish haemato‐biochemical profile and growth performance is essential to monitor the influence of fish feed and habitat on fish physiology. The influence of two regularly used different commercial feeds and varied environments such as pond and biofloc systems on haemato‐biochemical and growth parameters of Oreochromis niloticus was studied by the results of 4‐month experiment. Fish ponds and biofloc systems where all the fish were supplied either feed A and B were surveyed weekly. The crude protein content of feed A was 30%, while that of feed B was 28%. Physico‐chemical characteristics of water in all culturing systems were suitable for Nile Tilapia production throughout the study period. Results revealed a significant difference (p < 0.05) in most haemato‐biochemical parameters. Growth performance was better in fish fed on feed A than feed B in both culture systems. In between, the habitat wide range of haemato‐biochemical indices and fish growth parameters were significantly higher in biofloc technology than pond culture system. However, no significant difference (p > 0.05) was recorded in fish enzymatic activities in both systems. Furthermore, it was found that both the length and weight gain were positively associated with the crude protein of the feeds. However, in the case of biofloc, crude protein of both feeds works far better than the pond, as indicated by the p‐value and regression R square. Current study delivers the basic knowledge to observe fish blood and growth parameters, which could be essential to understanding the fish culture management and environment.

show abstract

Section: Discussionmentioning

confidence: 99%

Comparative analysis of the haemato‐biochemical parameters and growth characteristics of Oreochromis niloticus (Nile tilapia) cultured under different feed and habitats (biofloc technology and earthen pond system)

Habib

Batool

Rehman

et al. 2022

Aquaculture Research

View full text Add to dashboard Cite

show abstract

“…Fish were then transitioned onto a 6 mm diet (Tasman Aoraki; protein 43.6%, lipid 25.1%, ash 7.6% and moisture 5.8%) from day 86. Total feed consumed by each tank was determined daily by collecting uneaten feed and subtracting it from the total weight fed to the tank using the method described by Elvy et al (2022).…”

Section: Fish and Trial Set-upmentioning

confidence: 99%

“…During feed manufacture, ballotini beads were added at an inclusion rate of 1.3% in 4 mm feed and 1.0% in 6 mm feed. Calibration curves for each diet were determined by X-raying a range of weights from 1 pellet to larger than the expected meal size as per Elvy et al (2022). The number of beads in the X-rays was counted using "Bead Counter" (AgResearch Ltd., New Zealand; P. Smale, pers.…”

Section: Fish Growth and Feed Intake Assessmentsmentioning

confidence: 99%

“…During assessment 3, the fish were re-distributed into seven tanks to maintain a density below 26 kg/m 3 . The total feed eaten by an individual was calculated using the share of the meal (SOM) method, as described by Elvy et al (2022) and Esmaeili et al (2021). The SOM determines the percentage of the tank's total feed intake consumed by an individual.…”

Section: Fish Growth and Feed Intake Assessmentsmentioning

confidence: 99%

“…A direct comparison of nutrient utilisation by looking at which nutrients are deposited as growth can, therefore, be obtained (Esmaeili et al, 2021). Protein retention efficiency (PRE) appears correlated to feed efficiency in rainbow trout (Oncorhynchus mykiss; Silverstein et al, 2005;Eya et al, 2013;Overturf et al, 2013), Atlantic salmon (Kolstad et al, 2004) and Chinook salmon (Elvy et al, 2022). Kolstad et al (2004) also measured lipid and energy retention efficiency (LRE and ERE, respectively) in Atlantic salmon, but detected no link to FCR in this species.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The relationships between specific dynamic action, nutrient retention and feed conversion ratio in farmed freshwater Chinook salmon (Oncorhynchus tshawytscha)

Elvy

Symonds

Hilton

et al. 2023

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

Improving the feed conversion ratio (FCR; the amount of feed consumed relative to the amount of weight gain) can reduce both production costs and environmental impacts of farmed fish. The aim of this study was to investigate what drives FCR to understand how nutrients are retained, as well as the amount of oxygen consumed for digestion, absorption and assimilation (a metabolic process known as specific dynamic action, SDA). Feed‐efficient and inefficient Chinook salmon (Oncorhynchus tshawytscha) in fresh water were identified using ballotini beads and X‐radiography that tracked individual feed intake across three assessment periods under satiated feeding. This allowed a comparison of physiological traits and body composition between the two FCR phenotypes over two time points as Chinook salmon grew from 305 to 620 g. Fish with higher daily feed intake (DFI) had higher daily weight gain (DWG) as expected. Nonetheless, the relationship between FCR and DFI as well as FCR and DWG was variable between time points. FCR and DWG were not correlated at the first time point and were negatively correlated at the second time point. In contrast, FCR and DFI were positively correlated at the first time point but not the second. Despite this, efficient fish ate smaller meals and retained more protein, lipid and energy in their body tissues. There was no detectable difference in metabolism between the two FCR phenotypes with respect to minimal resting metabolic rate, maximum metabolic rate, aerobic scope, or SDA parameters. In conclusion, FCR is not consistently associated with growth and metabolic differences in freshwater Chinook salmon, but FCR‐efficient fish retain more nutrients and consume smaller meals.

show abstract

Dietary low‐fat content supplemented with oxytetracycline impairs physiological functions in Nile tilapia (Oreochromis niloticus) fingerlings

Limbu

2024

Animal Research and One Health

View full text Add to dashboard Cite

Nutrition modulates the vulnerability of animals to xenobiotics insults including antibiotics in cultured fish. However, studies exploring the role of low‐fat diet (LFD) in modulating adverse effects of antibiotics are currently limited. This study explored the physiological effects of feeding LFD supplemented with oxytetracycline (OTC) in Nile tilapia (Oreochromis niloticus) fingerlings. Thirty Nile tilapia (8.64 ± 0.44 g) were tagged and randomly stocked into three tanks and fed on a control diet (CD, 70 g/kg lipid), LFD (20 g/kg lipid) and the LFD supplemented with 2.00 g/kg diet of OTC (80 mg/kg body weight/day), hereafter LFD + OTC for 9 weeks. The results indicated that the Nile tilapia fed on LFD + OTC reduced growth performance and feed utilization efficiency than those fed on CD and LFD. Moreover, the fish fed on LFD + OTC had lower body composition, nutrients digestibility and mesenteric fat index than those fed on CD and LFD. Feeding the fish with LFD + OTC decreased antioxidant capacity in the liver than those fed on CD and LFD. The Nile tilapia fed on LFD + OTC increased hepatotoxicity than those fed on CD and LFD. Feeding the Nile tilapia on LFD + OTC decreased immunity response in the kidney and liver than those fed on CD and LFD. The LFD + OTC affected nutrients metabolism in the liver and serum than other diets. Taken together, feeding LFD with OTC impairs physiological functions of Nile tilapia by inhibiting growth performance, antioxidant capacity, immunity response and nutrient metabolism.

show abstract

The relationship of feed intake, growth, nutrient retention, and oxygen consumption to feed conversion ratio of farmed saltwater Chinook salmon (Oncorhynchus tshawytscha)

Cited by 33 publications

References 59 publications

Comparative analysis of the haemato‐biochemical parameters and growth characteristics of Oreochromis niloticus (Nile tilapia) cultured under different feed and habitats (biofloc technology and earthen pond system)

Comparative analysis of the haemato‐biochemical parameters and growth characteristics of Oreochromis niloticus (Nile tilapia) cultured under different feed and habitats (biofloc technology and earthen pond system)

The relationships between specific dynamic action, nutrient retention and feed conversion ratio in farmed freshwater Chinook salmon (Oncorhynchus tshawytscha)

Dietary low‐fat content supplemented with oxytetracycline impairs physiological functions in Nile tilapia (Oreochromis niloticus) fingerlings

Contact Info

Product

Resources

About