Overview of aquaculture feeds: global impacts of ingredient production, manufacturing, and use

Boyd, Claude E.; McNevin, Aaron A.

doi:10.1016/b978-0-12-821598-2.00003-5

Cited by 20 publications

(15 citation statements)

References 27 publications

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“…The defects in the tissues and lower proteolytic enzyme activities that ended up with a notable lower growth and peaked at 55% protein level might be due to increased antinutritional factors in the diet. FCR is considered to be an important parameter related to dietary utilization (Mengistu et al, 2020), and is a crucial indicator of feed use efficiency (Boyd, 2015). According to the results of the present study, the lowest FCR (5.0) was observed in group P40, and the remaining groups were similar.…”

Section: Discussionmentioning

confidence: 99%

Effects of dietary protein level on growth, histology and digestive enzyme activities of ornamental fish Ancistrus cirrhosus

Şahin

Gürkan

2022

Aquaculture Research

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Regardless of the developmental stage of the cultured organism, proper nutritional care is essential. A significant number of aquacultural species rely on protein as their main energy source and protein feeds sold in the ornamental market are formulated with widely varying protein inclusion levels. As Ancistrus cirrhosus is one of the most popular ornamental fish species, this study aimed to determine the effects of different protein levels on growth, digestive enzyme activities and liver and intestinal histopathology. Therefore, 450 fry (98.5 ± 3.1 mg [mean ± SE]), 5-6 weeks old, were fed six different experimental diets containing 30%, 35%, 40%, 45%, 50% and 55% crude protein in triplicate groups for 60 days. The results demonstrated that no significant differences were observed in the final lengths, whole-body protein levels, body condition indices and lipase and alkaline phosphatase activities of fish between groups. The fish fed with a 40% protein diet differed positively from other experimental groups in terms of final weight, FCR, SGR, proteolytic enzyme activities and histopathological findings. Lower proteolytic activity was ascertained in fish fed feed containing lower levels of protein (30%, 35%) and increased histopathological defects in the intestine and liver of fish fed feed containing over 40% protein (45%, 50% and 55%). Based on our results, a diet with a 40% protein level is most beneficial for the rearing of A. cirrhosus fry. Further research is required to determine optimal ratios, which are predicted to be between 35 and 40.

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Section: Discussionmentioning

confidence: 99%

Effects of dietary protein level on growth, histology and digestive enzyme activities of ornamental fish Ancistrus cirrhosus

Şahin

Gürkan

2022

Aquaculture Research

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“…Important performance and production traits for aquaculture include growth rate, feed conversion efficiency, disease resistance, stress tolerance such as low oxygen tolerance, reproductive success, harvestability, and processing yields, among many others ( Gjedrem, 2012 ; Boyd, 2015 ; Abdelrahman et al, 2017 ; Zhong et al, 2017 ; Li et al, 2019 ; Houston et al, 2020 ; Xu et al, 2022 ). Of these traits, disease resistance continues to be the top priority for aquaculture production because disease problems constitute the largest single cause of economic losses in aquaculture ( Mzula et al, 2021 ; Naylor et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Genetic and epigenetic regulation of growth, reproduction, disease resistance and stress responses in aquaculture

2022

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Major progress has been made with genomic and genetic studies in aquaculture in the last decade. However, research on epigenetic regulation of aquaculture traits is still at an early stage. It is apparent that most, if not all, aquaculture traits are regulated at both genetic and epigenetic levels. This paper reviews recent progress in understanding of genetic and epigenetic regulation of important aquaculture traits such as growth, reproduction, disease resistance, and stress responses. Although it is challenging to make generalized statements, DNA methylation is mostly correlated with down-regulation of gene expression, especially when at promoters and enhancers. As such, methylation of growth factors and their receptors is negatively correlated with growth; hypomethylation of genes important for stress tolerance is correlated with increased stress tolerance; hypomethylation of genes important for male or female sex differentiation leads to sex differentiation into males or females, respectively. It is apparent that environmental regulation of aquaculture traits is mediated at the level of epigenetic regulation, and such environment-induced epigenetic changes appeared to be intergenerationally inherited, but evidences for transgenerational inheritance are still limited.

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“…Unfortunately, it is no longer feasible economically or environmentally to provide this traditional protein source, even for the constantly expanding fish farming industry. (Boyd, 2015). In order to assess the utilization of substitutes for fish alimentation and fish oil in real-world diets, feeding tests were carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of replacement of dietary fish meal with carob moth (Ectomeylois ceratoniae) larvae on growth performance and feed utilization of Oreochromis niloticus.

Hadjeb

LEBBOUZ

ADJAMI

2022

Egyptian Journal of Agricultural Research

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Experiments using tilapia fish (Oreochromis niloticus) were used to assess the impact of dietary inclusion of Ectomeylois ceratoniae (EC) larval meal. A first growth trial was carried out on 360 Tilapia fish using three experimental diets, each of which had increasing quantities of EC meal inclusion. These diets were developed to contain EC meal inclusion at levels of 0 (EC0), 25% (EC1), 50% (EC2), and 100% (EC3). In 2021, our research was carried out at the department of agricultural sciences, Biskra University in Algeria. All fish given the test diets were examined for performance, as well as the fatty acid (FA) composition and proximal body profile. The addition of EC at 100% affects tilapia growth performance. When compared to EC1, EC2 and EC0, dietary EC3 improves tilapia growth and feed efficiency. Moreover, the impact on body weight, particularly protein and cinders, is significant, while EC3-fed fish had the lowest body lipid levels of all the treatments. Overall, the findings show that insect meal substrates will have an impact on fish performance; larvae are a good source of protein when used to substitute fishmeal. Therefore, more research is needed to optimize the EC harvest processing procedure. The nutritional composition of fish feed can also be improved to increase efficiency.

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Overview of aquaculture feeds: global impacts of ingredient production, manufacturing, and use

Cited by 20 publications

References 27 publications

Effects of dietary protein level on growth, histology and digestive enzyme activities of ornamental fish Ancistrus cirrhosus

Effects of dietary protein level on growth, histology and digestive enzyme activities of ornamental fish Ancistrus cirrhosus

Genetic and epigenetic regulation of growth, reproduction, disease resistance and stress responses in aquaculture

Effect of replacement of dietary fish meal with carob moth (Ectomeylois ceratoniae) larvae on growth performance and feed utilization of Oreochromis niloticus.

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