农学最新文献

{"title":"Performance and gut microbiota of catfish (Clarias gariepinus) fed powdered Moringa oleifera leave as additive (Probiotics)","authors":"Jerimoth Kesena Ekelemu ,&nbsp;Arnold Ebuka Irabor ,&nbsp;Ruth Elohor Anderson","doi":"10.1016/j.aaf.2023.04.006","DOIUrl":"10.1016/j.aaf.2023.04.006","url":null,"abstract":"<div><div>The antimicrobial activity of powdered <em>Moringa oleifera</em> leaves on the performance of <em>Clarias gariepinus</em> juveniles was investigated. A total of 180 <em>C. gariepinus</em> hatchery-bred juveniles were obtained, acclimated in a 4 × 4 × 3 feet concrete tank, and fed adlib with 1.5 mm Coppens for one week. Initial mean weight (g) and length (cm) of sample fish were measured and randomly distributed in triplicates of 15 fish/tank into twelve concrete tanks of dimension 4 × 4 × 3 feet (T_1A_-_C – T_4A-C). Four treatment diets were formulated, by adding graded levels of powdered <em>M. oleifera</em> leaf to the fish feed, using starch as binder. T₁ (control) had no moringa inclusion (control), while T₂, T_3, and T₄ respectively had 5 g, 10 g, and 15 g/kg inclusion. Length (cm) and weight (g) of fish were measured fortnightly, while haematology and serum profile, bacteria in the gut were collected at the end of the study. One-way Analysis of Variance (ANOVA) was used to analyze the data, and Duncan's multiple range test was employed for mean separation. Results revealed a significantly higher growth response in T₃ compared to other treatments (<em>P</em> &lt; 0.05). Haematological and seriological profile showed a boost in immunity of fish fed with the additive. Bacterial load in the fish gut was significantly reduced (<em>P</em> &lt; 0.05) as inclusion of additive increased. Therefore, for optimum fish production addition of 10g of <em>M. oleifera</em>/Kg of feed is recommended, as it gave the best result in terms of growth (<em>P</em> &lt; 0.05).</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 55-62"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80544582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genes for editing to improve economic traits in aquaculture fish species","authors":"Zituo Yang ,&nbsp;Guihong Fu ,&nbsp;May Lee ,&nbsp;Shadame Yeo ,&nbsp;Gen Hua Yue","doi":"10.1016/j.aaf.2024.05.005","DOIUrl":"10.1016/j.aaf.2024.05.005","url":null,"abstract":"<div><div>Aquaculture, a critical sector for global food security, faces the challenge of meeting growing demand while protecting wild fish populations. Gene editing, a powerful genetic tool, emerges as a potential solution. By modifying key genes in fish, it is expected to rapidly enhance growth rate, disease resistance, and other economically important traits, leading to increased profitability, sustainability, and competitiveness of the industry. This review navigates the complex landscape of genes for important traits, gene editing in aquaculture, exploring successes, challenges, and prospects for improved productivity, sustainability, and resilience. We provide guidance for researchers and stakeholders in identifying and editing genes responsible for important traits, while addressing economic, environmental, regulatory, and ethical considerations. This roadmap paves the way for a future where gene editing empowers aquaculture to meet global food needs while upholding environmental responsibility.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 1-18"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141699982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of variable light intensity in luminescent-netting pots on the catch of snow crab (Chionoecetes opilio)","authors":"Colin C.H. Frank,&nbsp;Shannon M. Bayse","doi":"10.1016/j.aaf.2023.08.001","DOIUrl":"10.1016/j.aaf.2023.08.001","url":null,"abstract":"<div><div>The use of light in pots has been shown to increase snow crab catch rates in eastern Canada and the Barents Sea, where better fishing efficiency could result in less fuel consumption, and financial and ecological benefits. However, some light characteristics necessary for maximizing efficiency have yet to be researched. The purpose of this study was to determine if there is a change in catch per unit effort (CPUE; number of snow crab per pot) and size selectivity of snow crab with varying light intensity. Three types of experimental luminescent-netting pots were used, each type with a different level of light intensity via the amount of phosphorescent strands woven into the pot netting, (either 2-, 4-, or 6-strands) and were compared to the traditional pot used in the fishery. There were mixed results among treatments, with the 2-strand pot catching fewer snow crab &lt;103 mm carapace width (CW) and more snow crab ≥103 mm CW than the traditional pots, but overall, had a lower CPUE for legal and sub-legal sized males (14.8 and 3.1 per pot, respectively) than the traditional (16.1 and 5.5 per pot, respectively) when considering all size classes. When compared to the traditional, the 4-strand pot caught more legal and sub-legal (CPUE of 18.8 and 8.0 per pot, respectively) snow crab in terms of CPUE but caught fewer commercial snow crabs from 95 to 98 and 103–113 mm CW. The brightest intensity pots (6-strand) showed no significant difference in CPUE or size selectivity in comparison to the traditional. Increased light intensity pots either had no effect on snow crab capture (6-strand) or produced unwanted results (loss of commercial sizes, increase in sub-legal sizes). Conversely, the 2-strand pot showed decreases in juvenile crab catch and increases in the catch of the most valuable size-classes observed, which are attractive results to fisheries managers and harvesters, respectively. These results, combined with a large price increase, suggest that higher light-intensity pots are not attractive for the commercial fishery.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 124-131"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79181900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High trophic similarity between non-native common carp and gibel carp in Turkish freshwaters: Implications for management","authors":"Sadi Aksu ,&nbsp;Özgür Emiroğlu ,&nbsp;Paride Balzani ,&nbsp;J. Robert Britton ,&nbsp;Esengül Köse ,&nbsp;Irmak Kurtul ,&nbsp;Sercan Başkurt ,&nbsp;Oğuzcan Mol ,&nbsp;Emre Çınar ,&nbsp;Phillip J. Haubrock ,&nbsp;Pinar Oztopcu-Vatan ,&nbsp;Ali Serhan Tarkan","doi":"10.1016/j.aaf.2023.08.003","DOIUrl":"10.1016/j.aaf.2023.08.003","url":null,"abstract":"<div><div>Although the detrimental ecological and economic effects of introducing freshwater fish species have been extensively documented, non-native freshwater fishes continue to be introduced in large numbers globally to enhance fisheries and aquaculture. In Turkey, stocking of common carp <em>Cyprinus carpio</em> is practised to provide food security for people and job security for artisanal fishers, resulting in a country-wide distribution. These stockings, however, increase the risk of accidental introductions and have led to introductions and subsequent invasions of gibel carp <em>Carassius gibelio</em>, a globally invasive and highly detrimental fish species. Here, we assessed the growth types, body conditions and trophic interactions via bulk carbon and nitrogen stable isotope analysis of common and gibel carp in both natural and artificial water bodies in Turkey. The results indicated that common and gibel carp express similar growth types and body conditions in all waters and have similar trophic ecologies. This leads to substantial trophic niche overlaps in waters where they co-occur, with the potential for strong interspecific competition. Considering the ongoing stocking of common carp for fishery enhancement, we recommend to specifically target these stockings in waters where gibel carp has already become invasive. Our findings, indeed, suggest that common carp releases have the potential to hamper invasive gibel carp populations by increasing the competitive interactions between the two species.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 141-148"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91322003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Speciation studies in the genomic era.","authors":"Ze-Fu Wang, Jian-Quan Liu","doi":"10.16288/j.yczz.24-218","DOIUrl":"https://doi.org/10.16288/j.yczz.24-218","url":null,"abstract":"<p><p>Since Darwin's era, speciation has been one of the most central issues in evolutionary biology studies. Understanding the processes of species origin is crucial in deepening our understanding of the formation of species biodiversity, which is essential for their protections. However, speciation research has been challenging due to the rather complex evolutionary histories of many extant species. In recent years, with the continuous advancements in genomic sequencing techniques, significant advances have been achieved in the field of speciation researches. In this review, we overview speciation study advances, especially in the concepts and latest developments in research methods for studying speciation in the genomic era, encompassing the major research aspects: species delimitation, bifurcating speciation, hybrid speciation, polyploid speciation, reproductive isolation genes and speciation genes. Furthermore, we discuss the limitations of these studies and methods. Finally, we provide the outlook on the future challenges and directions in speciation researches.</p>","PeriodicalId":35536,"journal":{"name":"遗传","volume":"47 1","pages":"71-100"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142956104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of new varieties adoption behavior of Chinese turbot farmer based on the perspective of heterogeneity","authors":"Qilei Ding ,&nbsp;Zhengyong Yang ,&nbsp;Renjie Xu ,&nbsp;Yifei Chen","doi":"10.1016/j.aaf.2023.07.001","DOIUrl":"10.1016/j.aaf.2023.07.001","url":null,"abstract":"<div><div>China is the largest turbot farming in the world, where germplasm source security is closely related to national security. To further promote the sustainable development of the turbot aquaculture industry, the China Marine Fish Industry Technology System team has developed a new variety of fast-growing turbot (hereinafter referred to as new varieties) in 2012. However, the promotion effect of new varieties has not reached the expectation, requiring research on the adoption behavior analysis of new varieties. Based on 272 turbot farmers, this study conducts theoretical analysis of framework of new varieties adoption, uses the binary Logit regression model to analyze the determinants of new varieties adoption behavior based on the perspective of heterogeneity. Heterogeneity means that farmers have certain differences, including differences in age, farming scale and enterprise form. Findings indicated that the adoption behavior of new varieties was affected by farming scale, education level, farming years, risk preference, channels of obtaining information, training effect, and government incentives. The adoption behavior of new varieties is group heterogeneity. The causes of low adoption rate of new varieties are farmer's lower risk preference, lower benefit of communication and limited government incentives. The results indicated that new varieties are more likely to be adopted in enterprises, young adult, and large-scale farmers groups. Policy implications from this research included strengthen government incentives for the promotion of new varieties, constructing the systematic and long-term training system and constructing the farmers-centered promotion system.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 163-170"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85465819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioeconomic analysis of the commercial production of Nile tilapia with biofloc and green water technologies","authors":"Berenice Suárez-Puerto ,&nbsp;Marcelo Araneda ,&nbsp;Mariel Gullian-Klanian","doi":"10.1016/j.aaf.2023.07.004","DOIUrl":"10.1016/j.aaf.2023.07.004","url":null,"abstract":"<div><div>This study presents a bioeconomic model after analyzing the commercial profitability of Nile tilapia under biofloc (BFT) and green water (GWT) technologies. Environmental stochasticity was evaluated using the parameters obtained in Yucatan's rainy (RN) and dry (DR) seasons. The productive impact was measured by analyzing the 10-year cash flow. Both systems demonstrated profitability with a positive NPV and 450 g harvest weight in the short term. The unit cost of production results for the GWT was lower than for the BFT. The long-term simulation involved an investment of $410,279 USD for 30 tanks, resulting in a positive return for GWT. BFT showed negative long-term profitability at the current selling price ($2.36 USD/kg). Profitability improved as the sales price increased by 11% and 22% for RN-BFT and DR-BFT, respectively. This bioeconomic model is pioneering in tilapia production in BFT and GWT and provides valuable data to achieve better yield and profitability.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 149-162"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79469833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stock status of kawakawa Euthynnus affinis (Cantor, 1849) fishery using surplus production model: An assessment from coastal waters of Tamil Nadu, Bay of Bengal, Southeast coast of India","authors":"Rajendran Abinaya,&nbsp;Moosambikandy K. Sajeevan","doi":"10.1016/j.aaf.2023.06.005","DOIUrl":"10.1016/j.aaf.2023.06.005","url":null,"abstract":"<div><div>Kawakawa <em>Euthynnus affinis</em> (Cantor, 1849) is one of the commercially exploited tuna fishery resource of India. Except landing data, no other information was available on its stock status. Hence, present study investigated the sustainability status of kawakawa fishery from Tamil Nadu, India. Data on annual catch and effort were reconstructed for the period of 2001–2020. The Catch-based MSY (CMSY), the Bayesian state-space Schaefer surplus production Model (BSM), and stochastic Surplus Production model in Continuous Time (SPiCT) packages were used to investigate the stock exploitation by running surplus production models with catch, catch per unit effort (CPUE), and other life history data. The biological reference points result of maximum sustainable yield (MSY) or biomass giving MSY (<em>B</em>_msy) and fishing mortality giving MSY (<em>F</em>_msy) of all the models indicated that the kawakawa stock in Tamil Nadu was subjected to overfishing and heading towards overfished status in recent decades. Results of the present study suggest reduction of fishing effort to keep the landing at MSY level and achieve a sustainable fishery.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 132-140"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79528423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prebiotic emergent sources for aquaculture: Microalgae and insects","authors":"Mónica Vanessa Oviedo-Olvera ,&nbsp;Ana Angélica Feregrino-Pérez ,&nbsp;María Isabel Nieto-Ramírez ,&nbsp;Marta Montserrat Tovar-Ramírez ,&nbsp;Humberto Aguirre-Becerra ,&nbsp;Juan Fernando García-Trejo","doi":"10.1016/j.aaf.2023.06.007","DOIUrl":"10.1016/j.aaf.2023.06.007","url":null,"abstract":"<div><div>The accelerated growth of aquaculture has encouraged the search for new techniques and inputs to increase the yield of various aquaculture species, considering the health and welfare of the organisms. Functional food development for fish nourishment includes ingredients containing bioactive compounds, such as prebiotics, that generate favorable immune responses. Non-digestible oligosaccharides function as growth promoters of the intestinal microbiota, improving nutrient absorption and enhancing the fish immune system. Therefore, the inclusion of new prebiotic-rich ingredients in the feed of aquatic organisms has generated interest. This article reviews the use of microalgae and insects as functional ingredients which provide quality macronutrients and contain different bioactive compounds that have been reported to have immunostimulatory effects. Their chemical composition is described, and their potential use as prebiotics for developing functional food for aquaculture is discussed.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 19-26"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84240100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new crustin-like gene from the redclaw crayfish Cherax quadricarinatus and its response to decapod iridescent virus 1 (DIV1) challenge","authors":"Xiaoying Hang,&nbsp;Jianbo Zheng,&nbsp;Fei Li","doi":"10.1016/j.aaf.2023.07.005","DOIUrl":"10.1016/j.aaf.2023.07.005","url":null,"abstract":"<div><div>Crustin, a widely-studied antimicrobial peptides (AMPs), has been proven to be involved in mediating innate immune responses against intruding pathogens. In this study, a novel <em>crustin</em>-like gene, <em>Cqcarc1</em>, was characterized from the redclaw crayfish <em>Cherax quadricarinatus.</em> The full-length cDNA sequence was 488 bp, and the open reading frame encoded 101 amino acids with a signal peptide in the N-terminus and a conserved WAP domain in the C-terminus. Similar to the <em>Crustin2</em> gene (<em>CqCrs</em>) in <em>C. quadricarinatus</em>, the highest expression level of <em>Cqcarc1</em> was also detected in the hemocyte organ. Moreover, RNAi-mediated gene silencing of <em>Cqcarc1</em> could increase the DIV1 copy number compared with the control group, suggesting its involvement in the immune defense against the DIV1 challenge. Furthermore, RNA interference analysis also showed that <em>Cqcarc1</em> plays positive regulatory roles in the expressions of <em>CqToll</em> and <em>CqCrs</em> during DIV infection. In summary, the current findings suggested the Toll-crustin signal pathway as a potential target for improving immunity from the DIV1 challenge.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 1","pages":"Pages 49-54"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75637870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}