Aquaculture Research最新文献

{"title":"Fenugreek Supplementation in Hybrid African Catfish Diets: Effect on Growth Performance, Physio-Metabolic Response, and Antioxidant Enzyme Capacity","authors":"Wasiu Adeyemi Jimoh,&nbsp;Femi John Fawole,&nbsp;Ayodeji Ahmed Ayeloja,&nbsp;Olayinka Abosede Ojo,&nbsp;Boluwatife Mary Ijalaye,&nbsp;Aishat Yetunde Adesaogun,&nbsp;Emmanuel Oladele Olaitan","doi":"10.1155/2024/6017812","DOIUrl":"https://doi.org/10.1155/2024/6017812","url":null,"abstract":"<div>\u0000 <p>The impact of dietary fenugreek (FN) supplementation on growth performance, physio-metabolic enzyme response, and antioxidant enzyme activities in hybrid African catfish (<i>Clarias gariepinus</i> ♀ × <i>Heterobranchus bidorsalis</i> ♂) was investigated in this study. Five isonitrogenous diets (38% crude protein) were developed and fed to the fish for 60 days. The FN was incorporated into the diets at 0%, 0.5%, 1.0%, 1.5%, and 2%. Two hundred twenty-five fingerlings of hybrid African catfish (average weight 4.01 g ± 0.02) were used for the study and randomly distributed to five dietary groups in triplicate. FN supplementation improved growth responses and survival rates; the dietary groups considerably (<i>p</i> &lt; 0.05) outperformed the control group. FN-based diets considerably increased the carcass protein content (<i>p</i> = 0.020) and improved protein retention (<i>p</i> = 0.015). FN supplementation markedly (<i>p</i> &lt; 0.001) and dose-dependently reduced the carcass’s lipid content and substantially (<i>p</i> &lt; 0.001) increased the levels of metabolic enzymes. The fish antioxidant capacity was significantly enhanced (<i>p</i> &lt; 0.001), and hepatic stress enzymes were greatly (<i>p</i> &lt; 0.001) lowered in FN-based diets. In summary, the second-order polynomial regression analysis indicates that the optimal dose of FN supplementation to improve hybrid catfish growth without negatively affecting the fish’s physio-metabolic response or overall wellbeing is 1% dietary inclusion level.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6017812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of Cryopreserved Sperm of Grass Carp (Ctenopharyngodon idella) for Seed Production at the Hatchery Level of Bangladesh—A Need for Development of Germplasm Repositories","authors":"Shajjad Hossian,&nbsp;Md. Faijan Reza,&nbsp;Mohammad Matiur Rahman,&nbsp; Mariom,&nbsp;Mohammed Jahangir Alam,&nbsp;Md. Abdur Razzak,&nbsp;Md. Fazlul Awal Mollah,&nbsp;Terrence R. Tiersch,&nbsp;Md. Rafiqul Islam Sarder","doi":"10.1155/2024/9655558","DOIUrl":"10.1155/2024/9655558","url":null,"abstract":"<div>\u0000 <p>Grass carp (<i>Ctenopharyngodon idella</i>), a freshwater nonnative fish species, is a potential aquaculture candidate in Bangladesh. The seed of the species is produced in the hatcheries by hypophysation, but the quality of seedstock of grass carp is deteriorated due to inbreeding, negative selection, and interspecific introgression among fishes. To increase the availability of quality seed and best genetic traits of grass carp, this study dealt with finding suitable conditions of sperm cryopreservation protocols and evaluated the effectiveness of cryopreserved sperm through breeding trials of <i>C. idella</i>. A broodstock population was developed from fingerlings imported from China by the Bangladesh Department of Fisheries. Sperm was collected from hormone-induced mature males, with an estimated concentration of 2.4 ± 0.3× 10¹⁰ cells/mL and a pH of 8.3 ± 0.2. Sperm motility was evaluated in different concentrations of NaCl solution. The highest motility (96% ± 1%) and longest motility duration (22 ± 1 min) were achieved at 0.4% of NaCl (128 mOsmol/kg). The toxicity of DMSO and methanol at concentrations of 5%, 10%, and 15% was evaluated for 5–40 min using Alsever’s solution and egg yolk citrate. The highest motility was achieved during 5 and 10 min of incubation with cryoprotectants at 5% and 10%. Alsever’s solution with 10% DMSO at 1:9 dilution with sperm produced the highest equilibration motility (93% ± 2%) and when cooled at 10°C/min yielded the highest postthaw motility (85% ± 3%). Fertilization of 24% ± 3% to 51% ± 2% and hatching of 18% ± 2% to 41% ± 2% were achieved by using cryopreserved sperm in six selected private hatcheries. The fertilization rate for fresh sperm sourced from hatchery-reared males was 64% ± 5% to 85% ± 3%, and the hatching rate ranged from 53% ± 6% to 74% ± 5%. Thus, the cryopreservation protocol of <i>C. idella</i> sperm was found to be feasible for fry production at commercial hatcheries, but further research is needed to improve the fertilization and hatching rates.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465967/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Acute Ammonia Exposure on the Antioxidant System and Anti-Inflammatory Factors in Opsariichthys bidens","authors":"Wanqing Tong,&nbsp;Huixian Chen,&nbsp;Zhuo Cai,&nbsp;Ming Li,&nbsp;Shuirong Guo,&nbsp;Shanjian Zheng","doi":"10.1155/2024/8188750","DOIUrl":"https://doi.org/10.1155/2024/8188750","url":null,"abstract":"<div>\u0000 <p>The present experiment was performed to reveal the mechanisms of toxic effects of ammonia nitrogen on Chinese hook snout carp (<i>Opsariichthys bidens</i>) based on the levels of antioxidant enzyme activities and the expression of 70-kDa heat shock protein gene (HSP70) and tumor necrosis factor-<i>α</i> (TNF-<i>α</i>) after 96 h of acute toxic ammonia exposure to investigate its adaptability. The result showed that activities of antioxidant enzymes and lipid peroxidation in the intestine, liver, brain, and gills showed a general trend of increasing and then decreasing when exposed to ammonia nitrogen. The intestinal tissue structure was damaged to varying degrees, the expression of the HSP70 in the brain and gills increased at 0–12 h, and the expression of the TNF-<i>α</i> in brain tissues decreased at 0–12 h. The expression of TNF-<i>α</i> in the liver was continuously upregulated in the late stages of stress, and it did not decrease until the stress was released. The above results indicate that high concentrations of ammonia nitrogen caused varying degrees of damage to the neurological, respiratory, and metabolic-related organs of the <i>O. bidens</i>.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8188750","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Different Feeding Habits on Metabolomics Profiles and Microbiota Composition and Functions of Tilapia Gut","authors":"Miao Wang,&nbsp;Mengmeng Yi,&nbsp;Ziyue Zhang,&nbsp;Zijian Fan,&nbsp;Lijin Jiang,&nbsp;Zhigang Liu,&nbsp;Zhang Wang,&nbsp;Maixin Lu,&nbsp;Jianmeng Cao,&nbsp;Xiaoli Ke","doi":"10.1155/2024/5545159","DOIUrl":"https://doi.org/10.1155/2024/5545159","url":null,"abstract":"<div>\u0000 <p>As an omnivorous fish, wild tilapia feed on both animal and plant foods, depending on what is available. To understand the nutritional function of the gut microbiota of tilapia, we used shotgun metagenomic sequencing, untargeted metabolomics analysis, and 16S rRNA gene sequencing to study the metabolites and gut microbial communities in tilapia eating different diets (artemia nauplii in the carnivorous diet; plant-based pelleted feed [PBP] in the herbivorous diet; and a mixture of these two in the omnivorous diet). A total of 225 Nile tilapia (<i>Oreochromis niloticus</i>) were cultured in nine 1500 L outdoor tanks, with three replicate tanks per diet and 25 fish per tank. <i>β</i>-diversity analysis revealed that there was no significant difference in microbial structure between the three diets. However, significant differences were detected in gut metabolites. The abundance of the core bacteria in tilapia intestine (genus <i>Cetobacterium</i>) increased significantly when an omnivorous diet was fed. <i>Cetobacterium</i> abundance was significantly correlated to some differential metabolites including glucose and amino acids, and significantly correlated to pathways of carbohydrate and amino acids metabolism, identified by metagenome analysis. Metagenomic binning produced seven <i>Cetobacterium</i> MAGs with the completeness &gt;50% and contamination &lt;10%, in which genes related to the above metabolites and metabolism pathways were identified. All seven MAGs contained CAZymes that could act on distinct carbohydrates, providing highly diversified capabilities to this genus to cope with both animal and plant glycans. These tilapia fed with an omnivorous diet also showed increased growth. The differential intestinal metabolites aspartate, isoleucine, ornithine, proline, nicotinate, and NAD+ could be related to the increased growth. Our results expanded the understanding of how tilapia have adapted to an omnivorous diet and may provide knowledge for improving aquaculture management.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5545159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Dietary Protein and Lipid Ratios on Zootechnical Performance and Body Composition of African Native Freshwater Prawn Macrobrachium macrobrachion (Herklots, 1851) Juveniles","authors":"Jean-Baptiste Atchamou,&nbsp;Diane Kpogue,&nbsp;Fabrice Lokonon,&nbsp;Missinhoun Dagoudo,&nbsp;Guillaume Koussovi,&nbsp;David Benhaïm,&nbsp;Elie Montchowui","doi":"10.1155/2024/2384480","DOIUrl":"https://doi.org/10.1155/2024/2384480","url":null,"abstract":"<div>\u0000 <p>Determination of protein and lipid requirements is crucial in prawn species aquaculture. The present study investigated the impact of six diets with different protein and lipid levels (T1, 30/08; T2, 30/12; T3, 35/08; T4, 35/12; T5, 40/08; and T6, 40/12), in triplicate, on the zootechnical performance and body composition of juvenile <i>Macrobrachium macrobrachion</i> over 56 days. These protein and lipid levels were chosen based on the requirements of other freshwater prawn species. The stocking density was one individual per liter. Results show that prawn survival was lower in T6 (with 40% protein and 8% lipid) compared to all others. The treatment T3 (35% protein and 8% lipid) shows higher survival (with 40.0 ± 24.0%) but not significantly different from other diets. The specific growth rate obtained in the present study was not different between diets. Negative values were recorded for treatments T2, T3, and T4 (30%, 35%, and 35% proteins and 12%, 8%, and 12% lipids, respectively) and positive values for treatments T1, T5, and T6 (30%, 40%, and 40% proteins and 8%, 8%, and 12% lipids, respectively). The protein efficiency coefficient (PEC) and the lipid efficiency coefficient (LEC) did not differ between treatments; however, there was a trend for these coefficients to be lower in T4, T5, and T6 (35%, 40%, and 40% proteins and 12%, 8%, and 12% lipids, respectively) compared with the other diets. The highest protein efficiency rates were recorded with the T3 and T4 treatments (35% proteins and 8% and 12% lipids, respectively), while the best lipid level was obtained with T4 (35% proteins and 12% lipids). According to dose–response models, the optimal protein/lipid ratio requirements for <i>M. macrobrachion</i> juveniles can be estimated at 35/8. This study is the first to provide relevant information on the nutritional needs of juveniles of African native freshwater prawn <i>M. Macrobrachion</i>. Further research is needed to optimize nutritional requirements at early stages of development.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/2384480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological Characteristics, Genetic Diversity, and Microsatellite Analysis of the Progenies (F1, F2, and Backcross Descendant) of Siniperca chuatsi and Siniperca scherzeri","authors":"Zhilun Zhang,&nbsp;Jijia Sun,&nbsp;Shuang Liu,&nbsp;Jiahui Chen,&nbsp;Xuchong Wei,&nbsp;Chenlei Huang,&nbsp;Li Lin,&nbsp;Qiuxian Chen,&nbsp;Xuange Liu,&nbsp;Haiyang Li,&nbsp;Huadong Yi,&nbsp;Sheng Bi,&nbsp;Linqiang Han,&nbsp;Jianhui Liang,&nbsp;Yong Zhang,&nbsp;Guifeng Li","doi":"10.1155/2024/6672569","DOIUrl":"https://doi.org/10.1155/2024/6672569","url":null,"abstract":"<div>\u0000 <p>Hybridization is a common technique in the breeding of new varieties. In this study, we obtained F₁ and F₂ hybrids through interspecific hybridization between <i>Siniperca chuatsi</i> and <i>Siniperca scherzeri</i> and backcross offspring by backcrossing between F₁ and <i>Siniperca chuatsi</i>. We analyzed the morphological traits and genetic diversity of the parents and their progeny. The results showed that although most morphological traits of the progeny were not significantly different from those of their parents, the F₁ hybrids exhibited the most pronounced morphological variations. The F₂ and backcross hybrids appeared morphological differentiation within their populations. The CPL/CPW ratio emerged as a reliable marker for identifying hybrids morphologically. The expected heterozygosity for F₁ (0.6264), F₂ (0.6677), and backcross offspring (0.5260) were intermediate between <i>Siniperca chuatsi</i> (0.7388) and <i>Siniperca scherzeri</i> (0.3910), indicating a relatively high level of genetic diversity in the offspring. Additionally, the private allele frequency of F₁ and F₂ was higher than backcross offspring. One SSR marker (G₅₂₂₀) was identified as a specific molecular marker to distinguish the hybrid F₁ population from the parents, hybrid F₂, and backcross F₁ populations by analyzing specific alleles. The result of <i>Ne</i>, <i>He</i>, <i>I</i>, and <i>PIC</i> confirmed that F₂ maintained the genetic diversity of F₁. We speculated that both F₁ and F₂ have higher breeding potential. This study provides essential baseline data for genetic breeding of mandarin fish that will be instrumental in the future.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6672569","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organic Aquaculture Regulation, Production, and Marketing: Current Status, Issues, and Future Prospects—A Systematic Review","authors":"Mirza Masum Beg,&nbsp;Subha M. Roy,&nbsp;Pradeep Ramesh,&nbsp;Sanjib Moulick,&nbsp;Tiyasha Tiyasha,&nbsp;Suraj Kumar Bhagat,&nbsp;Hisham A. Abdelrahman","doi":"10.1155/2024/5521188","DOIUrl":"https://doi.org/10.1155/2024/5521188","url":null,"abstract":"<div>\u0000 <p>The aquaculture industry will be crucial in helping the world’s food supply and keep up with the demand. Aquaculture, like agriculture, must expand and develop sustainably in all the countries to keep up with the rising demand for food. To this end, the aquaculture industry has forged new scientific and technological frontiers in pursuit of long-term food security. Among these is organic aquaculture, whose distinctive protocol has great potential to advance aquaculture. Organic aquaculture is being explored for multiple reasons, encompassing the aim to minimize environmental footprints, fulfill escalating consumer appetites for seafood, and contend within the industry this paper endeavors to address the gaps in current literature by offering an exhaustive overview of various aspects of organic aquaculture. This encompasses its regulation, production methods, food quality, environmental impact, economic viability, as well as socioeconomic and marketing aspects. It is necessary to acquire more knowledge about organic farming techniques before switching over to organic aquaculture on a large scale. Organic regulation, production, food quality, economic performance, and social and marketing issues are at the top. This review found that consumers lack understanding of organic principles, and regulations are inconsistently applied. However, organic aquaculture promotes social equality by protecting producers’ rights to work without discrimination based on gender, race, or sexual orientation factors that ultimately boost the industry’s popularity. Organic aquaculture viability varies depending on factors like feed costs, fixed expenses, and the premium pricing sensitivity, making it unfeasible for certain species. However, from both societal and economic standpoints, organic aquaculture appears most suitable for implementation in developing nations.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5521188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary Nanozeolite Powder to Reduce Water Total Ammonia Nitrogen (TAN) and Improve Growth Performance and Plasma Biochemical Indices of Nile Tilapia (Oreochromis niloticus)","authors":"Mehrdad Sarkheil,&nbsp;Hamidreza Ahmadniaye Motlagh,&nbsp;Omid Safari","doi":"10.1155/2024/6587244","DOIUrl":"https://doi.org/10.1155/2024/6587244","url":null,"abstract":"<div>\u0000 <p>The effects of nanoscale synthetic zeolite powder (NZeP) levels in diet on water quality, growth performance, muscle proximate composition, and some blood biochemical indices of Nile tilapia (<i>Oreochromis niloticus</i>) fingerlings were evaluated in a 60-day experiment. One hundred eighty fish with an average weight of 5.91 ± 0.45 g were distributed in three different groups of control (basal diet without NZeP), NZP_0.5% (basal diet + 0.5% NZeP), and NZeP_1% (basal diet + 1% NZeP) with triplicate. The zeolite particles were characterized via field emission scanning electron microscopy coupled with X-ray energy dispersive spectroscopy (FE-SEM/EDS), dynamic light scattering (DLS), and X-ray diffraction (XRD) techniques. The results revealed that the total ammonia nitrogen (TAN) concentration in the NZeP dietary groups decreased compared to the control group after the 20th day of the experiment (<i>p</i>  &lt; 0.05). The TAN concentration in the NZeP_1% group was lower than in the NZeP_0.5% group on days 50 and 60 (<i>p</i>  &lt; 0.05). The final weight, weight gain, and average daily gain parameters were lower in the fish fed on NZeP_1%-supplemented diet than in other dietary groups (<i>p</i>  &lt; 0.05). The feed conversion ratio value decreased in the NZeP dietary groups compared to the control (<i>p</i>  &lt; 0.05). The lowest FCR value was recorded in the NZeP_1% dietary group (<i>p</i>  &lt; 0.05). The muscle crude protein content increased in the fish fed on diet supplemented with NZeP_1% in comparison to the control (<i>p</i>  &lt; 0.05). The aspartate aminotransferase (AST) concentration decreased in the plasma of fish fed on NZeP-supplemented diets compared to the control (<i>p</i>  &lt; 0.05). The plasma glucose concentration was lower in the NZeP_1% dietary group than the control (<i>p</i>  &lt; 0.05). In conclusion, the adding nanozeolite powder at a level of 1% to diet had positive effects on water quality, the growth performance, and muscle proximate composition of Nile tilapia fingerlings.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6587244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Announcing the Ronald W. Hardy Award for Young Authors","authors":"Christyn Bailey,&nbsp;Ronald W. Hardy","doi":"10.1155/2024/8973452","DOIUrl":"https://doi.org/10.1155/2024/8973452","url":null,"abstract":"<p><i>Aquaculture Research</i> is committed to supporting young aquaculture and fisheries scientists and fish biologists by highlighting the work of early career authors worldwide. In this context, <i>Aquaculture Research</i> is delighted to announce an annual award named after our founding Editor-in-Chief Professor Ronald W. Hardy. Dr. Hardy is now a Distinguished Professor Emeritus in the Department of Animal and Veterinary Sciences and past Director of the Aquaculture Research Institute at the University of Idaho. In addition, to his role as Editor-in-Chief of <i>Aquaculture Research</i>, his career spanned several decades and encompassed a number of different international roles in which he played a significant contribution in advancing the field of aquaculture. Dr. Hardy has always been passionate about teaching the next generation of fish biologists, therefore given this and his esteemed career and previous contributions to the journal, <i>Aquaculture Research</i> is delighted to name our inaugural annual young authors award after him, in which he will also play a role in judging in collaboration with the current Editor-in-Chief.</p><p>The Ronald W. Hardy Award for Young Authors will be given out each year in August with the first award being granted in 2025 and receiving a cash prize of 500 pounds. This award is intended to recognize the noteworthy work being conducted by students and early career authors across all fields covered by the journal. To qualify for this award you have to either be listed on the manuscript as the first or last author and have completed your PhD or DPhil no more than five years ago and the qualifying manuscript published no earlier than January the year before the award is given, for instance for the 2025 award paper, only manuscripts published on or after January 1st 2024 will be considered. To apply for the award, please indicate this when submitting your manuscript by informing the Editor-in-Chief and/or the editorial office. Of course, reterospective submissions as long as they fufill the criteria will be considered and these can also be made as stated above. Moreover, as part of this initiative, we will promote the qualifying research and authors on our journal homepage.</p><p>The authors declare no conflicts of interest.</p><p>The authors received no specific funding for this work.</p>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8973452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of β-Mannanase on Fecal Viscosity, Digestible Energy Content, Amino Acid Digestibility, and Nutrient Loss in Juvenile Nile Tilapia Fed Soybean Meal-Rich Diets","authors":"Thais Pereira da Cruz,&nbsp;Bruno Wernick,&nbsp;Giovani Sampaio Gonçalves,&nbsp;Valéria Rossetto Barriviera Furuya,&nbsp;Wilson Massamitu Furuya","doi":"10.1155/2024/8812246","DOIUrl":"https://doi.org/10.1155/2024/8812246","url":null,"abstract":"<div>\u0000 <p>This study evaluated the impact of increasing dietary <i>β</i>-mannanase (BM) supplementation (Natupulse TS, BASF, Ludwigshafen am Rhein, Germany) on fecal viscosity and pH, apparent digestibility coefficients (ADCs) of energy and nutrients, including amino acids, fecal nutrient loss in contents of soybean meal (SBM)-based diets fed to juvenile Nile tilapia, <i>Oreochromis niloticus</i>. A total of 504 fingerlings (initial body weight of 31.5 ± 4.2 g) were randomly distributed into 24 aquaria (70 L each) in a completely randomized design using six dietary treatments and four replicates of 21 fish per aquarium. Fish were fed diets containing BM at 0, 1600, 3200, 4800, 6400, and 8000 TMU (thermostable endo-1,4-BM units) kg⁻¹ and hand-fed six times a day until apparent satiety for 30 days. Chromium oxide was employed as an indigestible marker. The ADC of gross energy, crude protein, crude lipids, and essential amino acids exhibited a quadratic effect with the maximum point in fish fed 4818, 4722, 4615, and 4816 TMU kg⁻¹ BM, respectively. The digestible energy (DE) content of diets presented a quadratic effect, and the maximum point was obtained in fish fed 4803 TMU BM kg⁻¹ diet, which improved the DE content by +1.2 MJ kg⁻¹ relative to the BM-unsupplemented diet. The fecal pH, fecal viscosity, organic matter loss, and nitrogen loss presented a quadratic effect with the minimum point in fish fed 4810, 4839, 4750, and 4801 TMU BM kg⁻¹ diet, respectively. Principal component analysis indicated that dietary BM at 4800 and 6400 TMU BM kg⁻¹ diet was associated with improvements in the ADC of gross energy, crude protein, and crude lipids. In conclusion, including 4803 TMU BM kg⁻¹ diet effectively improves DE content and optimizes nutrient digestibility and feces pH and viscosity in Nile tilapia fed an SBM-based diet.</p>\u0000 </div>","PeriodicalId":8104,"journal":{"name":"Aquaculture Research","volume":"2024 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8812246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}