Effect of the Lactiplantibacillus plantarum and Lentilactobacillus buchneri on corn and sorghum silage quality and sheep energy partition under tropical conditions     

Frederico Patrus Ananias de Assis Pires  Thierry Ribeiro Tomich  Luiz Gustavo Ribeiro Pereira  Fernanda Samarini Machado  Mariana Magalhães Campos  Alan Figueiredo de Oliveira  Guilherme Lobato Menezes  Rafael Araújo de Menezes  Pamella Grossi de Sousa  Diogo Gonzaga Jayme  Lúcio Carlos Gonçalves 《Grass and Forage Science》2023,78(1):224-235

This study aimed to evaluate the silage quality, ingestive behaviour, and sheep energy partition fed corn and sorghum silages, with or without inoculation with Lactiplantibacillus plantarum and Lentilactobacillus buchneri. Whole plants of one dent corn hybrid (DCS), one flint corn hybrid (FCS), and one forage sorghum hybrid (SS) were ensiled with or without an inoculant containing L. plantarum and L. buchneri (4 × 10⁵ CFU g⁻¹), totalling six treatments (3 × 2 factorial scheme). The treatments were ensiled in metal drums with 200 L capacity. The lactic acid concentrations in the inoculated FCS and DCS were higher by 13.4% and 12.8%, respectively, than those in the non-inoculated plants. In contrast, the lactic acid concentration in the inoculated SS was 23.1% lower than that in the non-inoculated SS. Furthermore, there were differences in pH and acetic acid concentrations only in SS, which were 2.3% and 45.2% higher, respectively, in inoculated silage than in non-inoculated silage. In inoculated DCS and SS, propionic acid concentrations were 1.7 times higher (for both silages), and 1-propanol was 3.7 and 1.8 times higher compared than those in non-inoculated silages. There was a main effect of the inoculant on 1,2-propanediol concentrations, which were 37.5% higher in inoculated silages than in non-inoculated silages. However, ingestive behaviour, heat and methane production, and silage net energy concentrations were not affected by inoculant use. Fermentative modifications caused by inoculation with L. plantarum and L. buchneri in whole plant corn or sorghum silage did not modify sheep energy partition.  相似文献   

Technical and economic feasibility of integrating seahorse culture in shrimp/oyster farms          下载免费PDF全文

Tamara Fonseca  Fernanda S David  Felipe A S Ribeiro  Alexandre A Wainberg  Wagner C Valenti 《Aquaculture Research》2017,48(2):655-664

Integrated multi‐trophic aquaculture systems (IMTA) are building ecosystems designed to produce aquatic organisms with less environmental impact. We have developed a simple system and a management strategy for introducing seahorse (Hippocampus spp.) culture in shrimp/oyster farms to increase economic sustainability. The system includes broodstock, nursery and grow‐out phases of Hippocampus reidi G. culture. We performed a test in a 42.4‐ha marine shrimp/oyster farm, which showed that this system is technically feasible. Then, we performed a partial budget analysis including cost‐return, cash flow and financial feasibility analysis. More than 12 000 marketable size seahorses may be produced in 402 m² annually. Initial investment was only US$ 21 103.00. The benefit–cost ratio was ~US$ 20.00 for each US$ 1.00 spent, internal rate of return was 131% and payback period <2 years. In conclusion, the introduction of seahorse in shrimp/oyster IMTA system is technically feasible, profitable, resilient and shows high liquidity. This system may be easily established in developing countries and has potential to provide seahorses to supply different markets (live specimens for the marine aquarium trade and dried specimens for traditional Chinese medicine and the curio trade). In addition, it can indirectly contribute to preserve natural populations.  相似文献   

Antibiotic resistance in potentially bacteriocinogenic probiotic bacteria in aquaculture environments          下载免费PDF全文

Juliana A Resende  Marina L Borges  Kelly D Pacheco  Izabella H Ribeiro  Dioneia E Cesar  Vânia L Silva  Cláudio G Diniz  Ana Carolina M Apolônio 《Aquaculture Research》2017,48(5):2113-2119

Bacteriocin‐producing bacteria in aquaculture may prevent spreading of potentially pathogenic microorganisms, and could be used as an alternative to the empirical use of antimicrobial drugs, especially for prophylaxis. Bacteriocinogenic bacteria inoculated as probiotics should not carry undesirable traits, such as antibiotic resistance. This study aimed to find potentially bacteriocinogenic bacteria in an aquaculture system and evaluate their antimicrobial susceptibility patterns. Selective cultures for enterobacteria, non‐fermenting Gram‐negative rods and Gram‐positive cocci were obtained from water samples before bacterial isolation and biochemical identification. Overall, 160 representative strains were recovered and for 57 antagonism was observed against selected strains such as Staphylococcus aureus, with antagonism being expressed better on Brain Heart Infusion medium. After exclusion of interfering factors, bacteriocin or bacteriocin‐like substances were suggested to be related to the antagonism observed. Higher drug‐resistant rates were observed among potentially bacteriocinogenic bacteria for different antimicrobials of clinical relevance. Although antibiotic resistance is a global health problem and bacteriocins are attractive alternatives to classical antibiotic even to multiresistant bacteria, the data obtained suggest that bacteriocin‐producing bacteria may harbour resistance genes available for transference in different environments. From the ecological and biotechnological perspective, antimicrobial susceptibility tests must be always performed when prospecting potentially bacteriocinogenic bacteria as probiotic candidates in the environment.  相似文献   

Seaweed Blends as a Valuable Source of Polyunsaturated and Healthy Fats for Nutritional and Food Applications     

Francisca Marques  Diana Lopes  Elisabete da Costa  Tiago Conde  Andreia Rego  Ana Isabel Ribeiro  Maria Helena Abreu  Maria Rosrio Domingues 《Marine drugs》2021,19(12)

Seaweeds are considered healthy and sustainable food. Although their consumption is modest in Western countries, the demand for seaweed in food markets is increasing in Europe. Each seaweed species has unique nutritional and functional features. The preparation of blends, obtained by mixing several seaweeds species, allows the obtaining of maximum benefits and ingredients with single characteristics. In this work, five seaweed blends, commercially available and produced under organic conditions in Europe, were characterized. The proximal composition included contents of ash (20.28–28.68% DW), proteins (17.79–26.61% DW), lipids (0.55–1.50% DW), and total carbohydrates (39.47–47.37% DW). Fatty acid profiles were determined by gas chromatography–mass spectrometry (GC–MS), allowing quantification of healthy fatty acids, namely n-3 and n-6 polyunsaturated fatty acids (PUFA), and calculation of lipid quality indices. Each blend showed a characteristic PUFA content in the lipid pool (35.77–49.43% of total fatty acids) and the content in essential and healthy n-3 PUFA is highlighted. The atherogenicity (0.54–0.72) and thrombogenicity (0.23–0.45) indices evidenced a good nutritional value of lipid fractions. As nutritional and environmentally attractive products, the consumption of the studied seaweed blends can contribute to a healthy lifestyle.  相似文献   

Regional and sectorial impacts of the COVID-19 pandemic in Sergipe,Brazil     

Luiz Carlos De Santana Ribeiro  Morais Correia De Melo Assunção Laudenor  Luiz Carlos Day Gama  Amir B. Ferreira Neto 《Growth and change》2023,54(3):674-693

This paper aims at estimating the regional and sectoral impacts of the Covid-19 pandemic in the state of Sergipe, Brazil in 2020. We use an input-output model with partial hypothetical extraction. The main results suggest a significant reduction in economic activity in the state, particularly in the Transport and Industry sectors. On the other hand, the Real estate and Food and Accommodation sectors have a greater capacity for recovery with the introduction of an emergency aid program. The municipalities with the largest absolute impact on gross domestic product are Aracaju, Canindé de São Francisco and Nossa Senhora do Socorro, two of them located in the metropolitan area of Aracaju.  相似文献   

Effect of experimental arginine supplementation on the growth,immunity and resistance of tilapia fingerlings to Streptococcus agalactiae     

Rafael Alves Vianna  Roberta Torres Chideroli  Arthur Roberto da Costa  Oswaldo Pinto Ribeiro Filho  Leandro Licursi de Oliveira  Juarez Lopes Donzele  Eduardo Arruda Teixeira Lanna  Daniela Dib Gonalves  Ulisses de Padua Pereira 《Aquaculture Research》2020,51(3):1276-1283

Streptococcosis causes serious economic losses to fish farms every year. A four‐week feeding trial was carried out to evaluate arginine (ARG) supplementation in the diet of Nile tilapia (Oreochromis niloticus) fingerlings challenged by Streptococcus agalactiae. Fish were fed with experimental diets containing five levels of supplementation with 1.39%, 1.76%, 1.97%, 2.18% or 2.39% analysed level of ARG. Each diet was randomly distributed in 30 tanks containing 20 fish/tank. After 30 days, no differences were observed in performance parameters, weight gain, daily weight gain, specific growth rate, feed intake or food conversion. After the performance assay, fingerlings were infected with 1.95 × 10⁸ CFU/fish of Streptococcus agalactiae. Mortality was verified daily, and the respiratory burst of leucocytes and nitric oxide production were measured at 0 hr, 24 hr, 7 days and 15 days after infection. The survival rate of the fish is compared using the Kaplan–Meier method, with values of 4.29%, 14.8%, 10.8%, 17.2% and 33.3% for the 1.39, 1.76, 1.97, 2.18 and 2.39 treatments respectively. A reduction in the mortality rate and a boost in the immune responses was observed in all the supplementations of ARG in the diet; however, the best survival rates were obtained in the treatments with 2.39% ARG as well as the most efficient immune responses.  相似文献   

Effects of dietary cholesterol on hepatopancreas associated with morphotypic differentiation in male Amazon River Prawns,Macrobrachium amazonicum (Heller, 1862)     

Thalles Fernando Rocha Ruiz  Karina Ribeiro  Carlos Alberto Vicentini  Irene Bastos Franceschini Vicentini  Luciene Patrici Papa 《Aquaculture Research》2019,50(3):862-870

Cholesterol is a necessary element in the diet of prawns and it is involved in the metabolic processes of sexual maturation and synthesis of the molting hormone. Freshwater prawns are not able to synthesise cholesterol from specialised metabolic pathways. The aim of this study was to describe changes in structural and morphometric patterns of hepatopancreas associated with morphotypic differentiation of males Macrobrachium amazonicum when fed with different levels of cholesterol. Considering the four morphotypes of this species, Translucent Claw morphotype specimens were split into experimental units and divided into four groups, fed with different levels of cholesterol (0%, 0.5%, 1%, 2%) for 50 days. They were collected as they reached Green Claw (GC) morphotype, weighed to determine the hepatosomatic index, and the hepatopancreas was processed in histological routine for morphologic and morphometric analysis. In this study, it was possible to observe that the 2% cholesterol treatment exhibited more animals that reached the GC morphotype, and there was no significant weight gain in all treatments. Histologically, B‐cell abundance and hypervacuolized as well as F‐ and R‐cells shortages were observed as the percentage of cholesterol increased. This alteration in cellular profile correlates with the morphometric analyses that exhibited an increase in epithelial area and alterations in the lumen shape. This imbalance observed in the lumen‐epithelium relationship may be associated with a low digestive performance and possibly congested the functions of hepatopancreas. Thus, high doses of cholesterol promoted morphotypic differentiation without weight gain, due to alterations on hepatopancreas.  相似文献   

Lack of essential fatty acids in live feed during larval and post-larval rearing: effect on the performance of juvenile <Emphasis Type="Italic">Solea senegalensis</Emphasis>     

Maria Luísa Dâmaso-Rodrigues  Pedro Pousão-Ferreira  Laura Ribeiro  Joana Coutinho  Narcisa M. Bandarra  Paulo J. Gavaia  Luís Narciso  Sofia Morais 《Aquaculture International》2010,18(5):741-757

Despite the large progress obtained in recent years, Senegalese sole (Solea senegalensis) production of high quality juveniles is still a bottleneck. This paper examines the effect of larval and post-larval lipid nutrition on juvenile performance and quality. Four dietary treatments were tested: A—enriched Artemia spp. (EA); B—non-enriched Artemia spp. (NEA); C—EA during the pelagic larval period and NEA after larval settlement; D—50% EA and 50% NEA. Juvenile fatty acid profile at 60 days after hatching (DAH) clearly reflected the larval and post-larval diet composition. Feeding sole larvae on NEA (poor in lipids and essential fatty acids-EFA) had a negative effect, reducing growth (total length and dry weight) after 30 DAH and decreasing digestive enzyme activity at the end of the rearing period (60 DAH). However, relatively good performance compared to the EFA-richest treatment (A) was obtained when larvae were fed 50% EA and 50% NEA (D) or even EA only during the pelagic larval period followed by NEA after larval settlement (C). Malpigmentation was not affected by the dietary regimes and its incidence was very low. However, skeletal deformities were prevalent, particularly in the caudal complex, independently of diet. The results confirm that Senegalese sole appear to have lower larval EFA requirements than most cultured marine species and potentially even lower requirements during the post-larval stage. The importance of studying the impact of early nutrition on later juvenile stages was clearly highlighted in this study.  相似文献   

Quantification of the invasiveness risk of non-native macroalgae in the Azores to support conservation measures     

Daniela Gabriel  Beatriz Martins  Cláudia Ribeiro  Lorenzo Vilizzi  Ana Isabel Ferreira  Suzanne Fredericq  Helena Calado 《水产资源保护:海洋与淡水生态系统》2024,34(1):e4082

Dam cascade in run-of-river systems promotes homogenisation of fish functional traits in a plateau river     

Douglas Ticiani  Crislei Larentis  Débora Reis de Carvalho  Ana Cristina Ribeiro  Rosilene Luciana Delariva 《Ecology of Freshwater Fish》2023,32(1):147-165

Impoundments caused by dams are often responsible for intense changes in physical, chemical, geomorphological and hydrological characteristics of rivers, and are one of the main causes in global freshwater biodiversity declines. When these changes derive from multiple cascading dams, the cumulative effect can amplify, causing more pronounced consequences than each individual reservoir, which may affect, among other factors, the biotic and functional conditions of fish fauna. We aim to evaluate the impact of dam cascades on fish functional diversity by applying trait-based analysis. We evaluate the functional attributes (functional indices and community-weighted means of trait values) and environmental variables at 11 sites, which encompassed different segments affected by the hydroelectric plants (transition, reservoir, reduced discharge section and tributary) in the Antas River Basin dam cascade system located in southern Brazil. The spatial differences of the functional indices (richness, evenness, divergence, dispersion and diversity) as well as the weighted averages of each functional trait were tested through analysis of variance. The most affected functional characteristics were those related to habitat exploration by detritivorous species, especially the use of food resources and body shape, as well as the type of swimming movement. These traits were more representative at the most downstream site of the complex. Thus, our results suggest that the cascade of dams acts in the functional homogenisation of the ichthyofauna in the intermediate stretches, mainly reflecting physical changes in habitat.  相似文献