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Nutrition, Growth, Health and Quality of Fish and Other Marine Products

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A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Aquatic Animals".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 17705

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Dr. Sónia Batista

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Guest Editor

NUTRIR - Technological Center for AgriFood Sustainability, ID&I (CISAS - IPVC), IPVC - Polytechnic Institute of Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 34, 4900-347 Viana do Castelo, Portugal
Interests: animal science; animal production; sustainable aquaculture; fish robustness; fish health; fish microbiota; feeds and new nutrient sources; algae as ingredients (micro- and macroalgae)

Dr. Marisa Silva

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Guest Editor

1. MARE-Marine and Environmental Sciences Centre, University of Lisbon, Lisbon, Portugal
2. Department of Plant Biology, Faculty of Sciences of the University of Lisbon, Campo Grande 1749-016 Lisbon, Portugal
Interests: marine compounds; biotechnology; food safety; pharmaceutical application; emergent toxins and contaminants; advanced analytical techniques; hyphenated techniques; liquid chromatography; mass spectrometry; extraction procedure optimization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Sustainable aquaculture is a pertinent matter, especially in regard to the themes of animal nutrition and welfare, as well as the quality and safety of seafood products. The design of sustainable nutritional formulations by using functional ingredients and probiotics/prebiotics, among others, enhances growth and improves health by mitigating stress factors and disease. For this purpose, the use of new emerging technologies in the optimization and valorization of industrial by-products as new protein sources for aqua feeds presents itself as a means that can bring enhancements in the circular economy context. Harmful algal blooms are also a relevant issue to be addressed, since they directly affect the aquaculture industry, as their occurrence leads to high fish mortalities and is a threat to food security.

Improvements in flesh quality, ensuring food traceability, slaughtering conditions, new processing methods, marine toxin rapid monitoring methods and packaging solutions for seafood items will also lead to an improvement in biosecurity and increase the confidence of end consumers.

The aim of this Special Issue is to publish original research papers or reviews concerning fish nutrition and the interrelations between fish welfare and seafood product quality and safety.

Dr. Sónia Batista
Dr. Marisa Silva
Guest Editors

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Keywords

sustainable aquaculture
fish nutrition
fish welfare
new aqua feeds
functional ingredients
probiotics/prebiotics
marine toxin control
fish flesh quality
safe seafood products

Published Papers (11 papers)

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Research

18 pages, 2261 KiB

Open AccessArticle

Squalene Supplementation as a Novel to Increase PUFA Content in Fish Tissues

by Piotr Niewiadomski, Piotr Gomułka, Małgorzata Woźniak, Mariusz Szmyt, Elżbieta Ziomek, Helena Bober, Mirosław Szczepkowski, Katarzyna Palińska-Żarska, Sławomir Krejszeff and Daniel Żarski

Animals 2023, 13(16), 2600; https://doi.org/10.3390/ani13162600 - 11 Aug 2023

Cited by 1 | Viewed by 844

Abstract

Squalene is an antioxidant that plays an essential role in fat metabolism. The study aimed to assess the effect of squalene supplied in feed on the growth performance, health status, and fatty acid profiles of muscle and liver of Siberian sturgeon, rainbow trout, and Eurasian perch. The experimental feeds containing 0%, 0.5%, and 1.0% squalene were prepared for each fish species. Hematological and biochemical indices, liver histology, and fatty acid profiling of muscle and liver were analyzed. Squalene supplementation was safe for fish, and no negative influence on growth status was observed. However, changes in the values of hematological and biochemical indicators were found, including the level of triglycerides in the blood of rainbow trout, and cholesterol in the blood of Eurasian perch. The addition of squalene influences the nucleocytoplasmic index values in all fish offered feed containing 1% squalene. The retention of squalene in the liver and muscle of experimental Siberian sturgeon was observed in both 0.5% and 1.0% squalene levels of feed. The PUFA and docosahexaenoic acid increase was observed in all fish in groups with squalene addition. Dietary squalene increases the content of PUFAs in tissues of the examined species. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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12 pages, 2806 KiB

Open AccessCommunication

Dietary Cholesterol Differentially Regulates the Muscle Lipidomics of Farmed Turbot and Tiger Puffer

by Xiaoxue Meng, Qingzhu Bi, Qiang Ma, Yuliang Wei, Yanlu Li, Mengqing Liang and Houguo Xu

Animals 2023, 13(10), 1632; https://doi.org/10.3390/ani13101632 - 13 May 2023

Viewed by 960

Abstract

Exogenous cholesterol has been supplemented into aqua-feeds due to the reduced proportions of fishmeal and fish oil. This study aimed to investigate the effects of dietary cholesterol supplementation on the muscle lipidomics of two marine fish species, turbot and tiger puffer. A 70-day feeding trial was conducted, where two low-fishmeal diets supplemented with 0 or 1% cholesterol were used. The lipidomic analysis with targeted tandem mass spectrometry showed that, in turbot, a total of 49 individual lipids exhibited significant differences in their abundance in response to dietary cholesterol, whereas the number was 30 for tiger puffer. Dietary cholesterol up-regulated the abundance of cholesterol and cholesterol ester in both species. In turbot, the dietary cholesterol also increased the abundance of triacylglycerol and acylcarnitine, whereas in tiger puffer, it primarily regulated the abundance of phospholipids and BMP. This was the first time the responses of marine fish muscle lipidomics to dietary cholesterol supplementation have been investigated. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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15 pages, 1065 KiB

Open AccessArticle

Effects of Different Dietary Protein Levels on the Growth Performance, Physicochemical Indexes, Quality, and Molecular Expression of Yellow River Carp (Cyprinus carpio haematopterus)

by Shihui Wang, Jingwen Tian, Xiaona Jiang, Chitao Li, Yanlong Ge, Xuesong Hu, Lei Cheng, Xiaodan Shi, Lianyu Shi and Zhiying Jia

Animals 2023, 13(7), 1237; https://doi.org/10.3390/ani13071237 - 02 Apr 2023

Viewed by 1458

Abstract

A 12-week rearing trial was carried out to estimate effects on the growth performance, physicochemical indexes, quality, and the molecular expression of Yellow River Carp (Cyprinus carpio haematopterus) using five practical diets, including dietary protein levels of 220, 250, 280, 310, and 340 g/kg. The results illustrated that the fish’s weight gain (WG) and specific growth rate (SGR) were significantly influenced, with an ascending dietary protein level of up to 250 g/kg (p < 0.05). The carp muscle contents of total saturated fatty acids (∑SFA), monounsaturated fatty acids (∑MUFA), polyunsaturated fatty acids (∑PUFA), and fatty acids (∑FA) decreased significantly with the ascending dietary protein levels, except for the 250 g/kg protein diet (p < 0.05). Only the glutamic acid and total essential amino acid (∑EAA) contents were significantly influenced by the ascending dietary protein levels (p < 0.05). The relative GH expression of the carp muscle significantly decreased with the increase in the dietary protein level up to 310 g/kg, and then it significantly increased (p < 0.05). In the intestines, the peak relative TOR expression was observed on the 220 g/kg protein diet, while the relative 4EBP1 expression was significantly influenced by the dietary protein level up to 250 g/kg (p < 0.05). In the muscle, the peak relative TOR and 4EBP1 expression levels were observed on the 250 g/kg protein diet. In gills, the lowest relative Rhag, Rhbg, and Rhcg1 expression levels were observed on the 250 g/kg protein diet. Based on all of the aforementioned results, the optimal dietary protein level for Cyprinus carpio haematopterus (160.24 ± 15.56 g) is 250–280 g/kg. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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18 pages, 4612 KiB

Open AccessArticle

Combined Effects of Temperature and Dietary Lipid Level on Body Composition, Growth, and Freshness Profile in European Seabass, Dicentrarchus labrax

by Patrícia G. Cardoso, Odete Gonçalves, Thais Cavalheri, Vânia E. Amorim, Weiwei Cao, Diogo A. M. Alexandrino, Zhongjun Jia, Maria F. Carvalho, Paulo Vaz-Pires and Rodrigo O. A. Ozório

Animals 2023, 13(6), 1068; https://doi.org/10.3390/ani13061068 - 15 Mar 2023

Cited by 2 | Viewed by 1444

Abstract

A fish trial was carried out to evaluate the combined effects of temperature and dietary lipid level on the body composition, growth performance, and freshness profile of the European seabass (Dicentrarchus labrax). Fish were kept for 56 days at 20 °C and 24 °C and fed on two diets, with 16% and 20% lipid. At the end of the trial, fish were euthanized at two temperature conditions (0.6 °C or −0.6 °C) and kept on ice for 10 days at 4 °C to evaluate their freshness condition. Findings demonstrated that fish reared at 24 °C presented a lower lipid level and a higher daily growth index than those at 20 °C. Additionally, sensory analysis (Quality Index Method—QIM) and microbiological analysis revealed that fish reared at 24 °C showed better freshness conditions than those at 20 °C. However, the 16S rRNA metabarcoding analyses revealed a higher proliferation of genera associated with fish-spoiling bacteria in the skin microbiome of fish reared at 24 °C, i.e., Vibrio and Acinetobacter, which was not observed in the skin microbiome of fish reared at 20 °C. Nevertheless, the dietary lipid level did not have any influence on fish freshness. Therefore, our data suggest that the increase in temperature to 24 °C is beneficial for the growth and freshness profile (lower QIM and lower CFUs/cm²) of this particular species. Additionally, the lower euthanasia temperature (−0.6 °C) seems to lead to higher fish freshness than the normal temperature (0.6 °C). Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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23 pages, 2319 KiB

Open AccessArticle

Evaluation of the Combined Administration of Chlorella fusca and Vibrio proteolyticus in Diets for Chelon labrosus: Effects on Growth, Metabolism, and Digestive Functionality

by Jorge García-Márquez, Antonio Jesús Vizcaíno, André Barany, Alba Galafat, Gabriel Acién, Félix L. Figueroa, Francisco Javier Alarcón, Juan Miguel Mancera, Juan Antonio Martos-Sitcha, Salvador Arijo and Roberto Teófilo Abdala-Díaz

Animals 2023, 13(4), 589; https://doi.org/10.3390/ani13040589 - 07 Feb 2023

Cited by 4 | Viewed by 1753

Abstract

This study aimed to evaluate the combined effect of dietary Chlorella fusca and ethanol-inactivated Vibrio proteolyticus DCF12.2 (C + V diet) in Chelon labrosus juveniles, highlighting their nutritional, physiological, and morphological effects. The results showed that the combined dietary inclusion of C. fusca and V. proteolyticus significantly enhanced growth performance and feed utilization compared to the control group. The C + V diet increased the fish lipid quality index (FLQ), n-3 polyunsaturated fatty acids, and n-3/n-6 ratio, which might be beneficial in terms of human nutrition. The C + V diet considerably increased carbohydrate metabolic activity by statistically boosting plasma glucose. The dietary inclusion of C. fusca in conjunction with V. proteolyticus increased metabolic enzyme activity as well as intestinal absorption capacity compared to that found in the control group. In conclusion, the experimental diet was suitable for feeding C. labrosus, increasing their growth and the nutritional characteristics of the muscle and intestine, without causing tissue damage. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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14 pages, 876 KiB

Open AccessArticle

First Insights on the Administration of Insect Oil (Black Soldier Fly Larvae) in the Diet of Juvenile Onychostoma macrolepis

by Nina Gou, Kaifeng Wang, Tiezhi Jin and Bin Yang

Animals 2023, 13(3), 518; https://doi.org/10.3390/ani13030518 - 01 Feb 2023

Viewed by 1370

Abstract

The use of insect products in aquatic feed is the focus of the aquaculture industry. Black soldier fly larvae oil (BSFLO) has been examined as a potential lipid source for diets for some fish species, but its utilization on Onychostoma macrolepis has not been explored. The influences of substituting fish oil (FO) with BSFLO in the diet on growth, biological indicators, approximate composition, serum biochemistry, antioxidant capacity and expression of lipid metabolism genes in juvenile O. macrolepis were investigated in an eight-week feeding experiment. Four experimental diets were prepared by replacing 0 (control), 25% (BSFLO-25), 50% (BSFLO-50) and 100% (BSFLO-100) FO with BSFLO, and then randomly assigned to twelve aquariums with ten fish (1.75 ± 0.05 g) in each aquarium. The findings showed that the growth indicators, body composition and serum biochemistry in the BSFLO-25 and BSFLO-50 groups had no statistical differences from those of the control group. The activities of superoxide dismutase (SOD) (91.22–94.96 U/mgprot) and the contents of malondialdehyde (MDA) (1.12–1.16 nmol/mgprot) in the liver appeared to be significantly the highest and the lowest in the BSFLO-25, BSFLO-50 and BSFLO-100 groups (p < 0.05). The adipocyte size and intraperitoneal fat index value of fish fed on the BSFLO-100 diet were significantly decreased compared to the control group (p < 0.05). The expression levels of lipid catabolism genes pparα, (peroxisome proliferators-activated receptor alpha) and cpt1a (carnitine palmitoyltransferase 1 isoform a) in the BSFLO-100 group were significantly higher than those of the control group (p < 0.05). The above results indicated that it was feasible to replace 25–50% dietary FO with BSFLO in juvenile O. macrolepis. Dietary BSFLO supplementation could enhance the antioxidant capacity of the liver and suppress intraperitoneal fat accumulation in O. macrolepis. The use of other insect oils in the diets of this species will be evaluated in future research. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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21 pages, 6826 KiB

Open AccessArticle

Solid-State Fermentation of Plant Feedstuff Mixture Affected the Physiological Responses of European Seabass (Dicentrarchus labrax) Reared at Different Temperatures and Subjected to Salinity Oscillation

by Diogo Amaral, Diogo Moreira Filipe, Thais Franco Cavalheri, Lúcia Vieira, Rui Pedro Magalhães, Isabel Belo, Helena Peres and Rodrigo O. de A. Ozório

Animals 2023, 13(3), 393; https://doi.org/10.3390/ani13030393 - 24 Jan 2023

Cited by 3 | Viewed by 2379

Abstract

This study aimed to evaluate the effects of dietary inclusion of plant feedstuff mixture (PFM) pre-treated by solid-state fermentation (SSF) on the physiological responses of European seabass. For that purpose, two diets were formulated to contain: 20% inclusion level of non-fermented plant ingredients mixture (20Mix) and 20Mix fermented by A. niger in SSF conditions (20Mix-SSF). Seabass juveniles (initial body weight: 20.9 ± 3.3 g) were fed the experimental diets, reared at two different temperatures (21 and 26 °C) and subjected to weekly salinity oscillations for six weeks. Growth performance, digestive enzyme activities, humoral immune parameters, and oxidative stress indicators were evaluated. A reduction in weight gain, feed intake, and thermal growth coefficient was observed in fish fed the fermented diet (20Mix-SSF). Salinity oscillation led to an increase in weight gain, feed efficiency, daily growth index, and thermal growth coefficient, regardless of dietary treatment. Higher rearing temperatures also increased daily growth index. No dietary effect was observed on digestive enzymes activities, whereas rearing temperature and salinity oscillation modulated digestive enzyme activities. Oxidative stress responses were significantly affected by experimental diets, temperature, and salinity conditions. Catalase and glutathione peroxidase activities showed an interactive effect. Fish reared at 21 °C showed higher enzymatic activity when fed the 20Mix-SSF. Conversely, fish reared at 26 °C showed higher GPx activity when fed the 20Mix diet. Fish reared at 26 °C showed reduced peroxidase and lysozyme activities, while salinity fluctuation led to increased lysozyme activity and decreased ACH50 activity. ACH50 activity increased in fish fed the 20Mix-SSF. Overall, the dietary inclusion of PFM fermented by A. niger was unable to mitigate the impact of environmental stress on physiological performance in European seabass. In fact, fermented feed caused an inhibition of growth performances and an alteration of some physiological stress indicators. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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9 pages, 854 KiB

Open AccessCommunication

Fatty Acid Profiles in the Gonads of Red King Crab (Paralithodes camtschaticus) from the Barents Sea

by Alexander G. Dvoretsky, Fatima A. Bichkaeva, Nina F. Baranova and Vladimir G. Dvoretsky

Animals 2023, 13(3), 336; https://doi.org/10.3390/ani13030336 - 17 Jan 2023

Cited by 5 | Viewed by 1498

Abstract

Red king crab (Paralithodes camtschaticus) is a large shelf species native to the Pacific Ocean. Due to its high commercial value, this species was introduced into the Barents Sea, where it has formed a new population that now supports a stable commercial fishery. Information on fatty acid profiles in different tissues of the Barents Sea P. camtschaticus is scarce. For this reason, the gonads of red king crabs collected at a coastal site in the Barents Sea during the summer were analyzed for fatty acid composition by gas-liquid chromatography. The proportions of total saturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids in the ovaries of P. camtschaticus were 25.9 ± 2.0%, 22.5 ± 2.3%, and 51.6 ± 2.5%, respectively; in the testes, these levels accounted for 35.1 ± 5.7%, 19.1 ± 2.0%, and 45.8 ± 4.5%, respectively. Fatty acid profiles were similar in larger and smaller red king crabs and crabs with old and new shells. Concentrations of fatty acids were higher in ovaries compared to testes, reflecting higher reproductive efforts in female red king crabs. High levels of docosahexaenoic and eicosapentaenoic fatty acids detected in the ovaries of red king crabs from the Barents Sea indicate that these gonads can be a good alternative source for these fatty acids in the human diet and/or for extracting important fatty acids for use in the medical and pharmaceutical industries. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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15 pages, 2081 KiB

Open AccessArticle

Molecular Characterization of LKB1 of Triploid Crucian Carp and Its Regulation on Muscle Growth and Quality

by Anli Zuo, Yonghua Zhou, Yingjie Li, Yu Zhang, Zilin Yi, Yangbo Xiao, Mei Zou, Shenping Cao, Fufa Qu, Jianzhou Tang and Zhen Liu

Animals 2022, 12(18), 2474; https://doi.org/10.3390/ani12182474 - 19 Sep 2022

Cited by 4 | Viewed by 1634

Abstract

Liver Kinase B1 (LKB1) is a serine/threonine kinase that can regulate energy metabolism and skeletal muscle growth. In the present study, LKB1 cDNA of triploid crucian carp (Carassius auratus) was cloned. The cDNA contains a complete open reading frame (ORF), with a length of 1326 bp, encoding 442 amino acids. Phylogenetic tree analysis showed that the LKB1 amino acid sequence of the triploid crucian carp had a high sequence similarity and identity with carp (Cyprinus carpio). Tissue expression analysis revealed that LKB1 was widely expressed in various tissues. LKB1 expressions in the brain were highest, followed by kidney and muscle. In the short-term LKB1 activator and inhibitor injection experiment, when LKB1 was activated for 72 h, expressions of myogenic differentiation (MyoD), muscle regulatory factor (MRF4), myogenic factor (MyoG) and myostatin 1 (MSTN1) were markedly elevated and the content of inosine monophosphate (IMP) in muscle was significantly increased. When LKB1 was inhibited for 72 h, expressions of MyoD, MyoG, MRF4 and MSTN1 were markedly decreased. The long-term injection experiment of the LKB1 activator revealed that, when LKB1 was activated for 15 days, its muscle fibers were significantly larger and tighter than the control group. In texture profile analysis, it showed smaller hardness and adhesion, greater elasticity and chewiness. Contrastingly, when LKB1 was inhibited for 9 days, its muscle fibers were significantly smaller, while the gap between muscle fibers was significantly larger. Texture profile analysis showed that adhesion was significantly higher than the control group. A feeding trial on triploid crucian carp showed that with dietary lysine-glutamate dipeptide concentration increasing, the expression of the LKB1 gene gradually increased and was highest when dipeptide concentration was 1.6%. These findings may provide new insights into the effects of LKB1 on fish skeletal muscle growth and muscle quality, and will provide a potential application value in improvement of aquaculture feed formula. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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13 pages, 1888 KiB

Open AccessArticle

In Vivo Ultrasound Prediction of the Fillet Volume in Senegalese Sole (Solea senegalensis)

by João Afonso, Cristina Guedes, Alfredo Teixeira, Paulo Rema and Severiano Silva

Animals 2022, 12(18), 2357; https://doi.org/10.3390/ani12182357 - 09 Sep 2022

Cited by 1 | Viewed by 1253

Abstract

Senegalese sole (Solea senegalensis) has been considered a promising new flatfish species for Mediterranean marine fish farming. Accurate prediction of fillet traits in live animals may allow for more efficient control of muscle deposition in fish. In this sense, this study was undertaken to develop a non-invasive method to predict in vivo fish fillet volume and yield using real-time ultrasonography (RTU). The trial was conducted with 44 market weight Senegalese sole (298.54 ± 87.30 g). Fish were scanned with an Aloka SSD 500V with a 7.5 MHz probe. Ten RTU cross-sectional images were taken from the operculum to the caudal fin at regular intervals. These images were analyzed using Fiji software. These data were then used to estimate the partial volumes of the fillet. Actual fillet volume was determined using Archimedes’ principle. Simple and stepwise multiple regression analyses were then used to develop prediction models of fillet volume and yield. The most cranial RTU sections of the fish fillet were the best single predictors of both fillet volume and fillet yield and were the ones included in the best stepwise models. The best RTU slice area explained 82% of the variation observed in fillet volume, but the other RTU slice areas used as predictors of fillet volume showed poor to moderate accuracy (0.035 ≤ R² ≤ 0.615). Single RTU partial volumes showed poor to very high accuracy (0.395 ≤ R² ≤ 0.970) as predictors of fillet volume. The best stepwise model based on the RTU slice areas included three independent variables and explained 88.3% of the observed variation. The best stepwise models based on RTU partial volumes (single volumes and/or combinations of single volumes) explained about 97% of the variation observed in fillet volume. Two RTU volume traits, V_1–5 + V_6–9, and V₁₊₍₎₊₉, showed to be practically direct predictors of the actual fillet volume, explaining, respectively, 97% and 96% of the variation observed in the actual fillet volume. The fillet yields show lower correlations with slice areas (r between 0.044 and 0.601) than with volumes (r between 0.288 and 0.637). While further studies are clearly necessary to better understand the potential of RTU for the estimation of fillet yield in fish in general and Senegalese sole in particular, the present results showed that RTU traits can be very good predictors of Senegalese sole’s fillet volume, either used in regression models or as direct predictors. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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12 pages, 1004 KiB

Open AccessCommunication

Fatty Acid Content of Four Salmonid Fish Consumed by Indigenous Peoples from the Yamal-Nenets Autonomous Okrug (Northwestern Siberia, Russia)

by Alexander G. Dvoretsky, Fatima A. Bichkaeva, Olga S. Vlasova, Sergei V. Andronov and Vladimir G. Dvoretsky

Animals 2022, 12(13), 1643; https://doi.org/10.3390/ani12131643 - 27 Jun 2022

Cited by 3 | Viewed by 1914

Abstract

We assayed fatty acids in the flesh of Arctic cisco Coregonus autumnalis (adult and juvenile), least cisco Coregonus sardinella, muksun Coregonus muksun, and Arctic charr Salvelinus alpinus inhabiting water bodies of the Gydan Peninsula, Siberia, Russia. The highest concentrations of total and polyunsaturated fatty acids (PUFAs) were found in Arctic charr (27.8 and 9.5 mg g⁻¹) and adult Arctic cisco (20.2 and 7.6 mg g⁻¹), while the lowest concentrations occurred in juvenile Arctic cisco (7.5 and 3.6 mg g⁻¹). Multivariate analyses divided all studied fish into five distinct groups with the highest similarity between least cisco and muksun and the highest dissimilarity between juvenile Arctic cisco and Arctic charr. Coregonid fish from the study area had a higher content of docosahexaenoic and eicosapentaenoic acids than their conspecifics from subarctic and temperate habitats. The flesh of the studied fish is a source of a healthy diet for humans. Taking into account that all the studied fish are components of the traditional diet of indigenous peoples in northwestern Siberia, our data may be useful not only for local consumers and anglers but also for stakeholders focused on food policy and food security in the area. Full article

(This article belongs to the Special Issue Nutrition, Growth, Health and Quality of Fish and Other Marine Products)

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