Significant improvement of shrimp growth performance by growth hormone‐releasing peptide‐6 immersion treatments          下载免费PDF全文

Amílcar Arenal  Juana María Lugo  Reynold Morales  Leonardo Martín  Ramón Franco Rodríguez  Jannel Acosta  Antonio Morales  Jorge Duconge  Mario Pablo Estrada 《Aquaculture Research》2017,48(9):4632-4645

Growth hormone‐releasing peptide‐6 (GHRP‐6) is one of the earliest developed synthetic peptidyl growth hormone secretagogue receptor agonists. These compounds mimic the effect of the endogenous ligand ghrelin. In vertebrates, ghrelin is a potent circulating orexigenic hormone with functional roles in controlling food intake, energy expenditure, adiposity, growth hormone secretion and immunity. Ghrelin has been studied mainly in vertebrates; thus, little is known about its role in invertebrates, including crustaceans. We first evaluated the effect of GHRP‐6 injection over feed intake in shrimp and its effects on shrimp growth when the peptide was administrated by successive immersion baths. GHRP‐6 increased feed intake, body weight and size, the number of rostral spines and gill branches, protein concentration and haemocyte number in treated shrimps. We also evaluated the peptide uptake and clearance in a pharmacokinetics, using [H³]GHRP‐6 administered to postlarvae. Given a limited exposure and efficient clearance of the peptide‐associated radioactivity from larvae, our findings suggested that GHRP‐6‐treated Litopenaeus vannamei can be consumed safely by humans after aquaculture applications. These results propose that GHRP‐6 could be an additional tool to study growth physiology in crustaceans and also a promising candidate for development into a new biotechnology product for improving shrimp growth and quality.  相似文献   

Reconstructing the history of human impacts on coastal biodiversity in Chile: constraints and opportunities     

Marcelo M. Rivadeneira  Calogero M. Santoro  Pablo A. Marquet 《水产资源保护:海洋与淡水生态系统》2010,20(1):74-82

• 1. Although Chile is at the forefront in evaluating experimentally the importance of human harvesting impacts on coastal biodiversity, there are no evaluations of such impacts on a long‐term historical basis (tens to thousands of years). Different types of archival information (i.e. contemporaneous, archaeological, and palaeontological) were used to carry out a research programme based on the historical assessment of the impacts and intensity of resource extraction on coastal biodiversity along the Chilean coast.
• 2. In addition to recent scientific literature, different sources of contemporaneous information (e.g. museum collections, old reports and accounts) can reveal the human impacts observed in the more recent past. Furthermore, the large number of prehistoric shell middens along the entire Chilean coast offer access to ～11 000 years of history along the entire coast, although the faunal composition, structure, and dynamics of most of them remain largely unstudied.
• 3. Finally, the rich and widespread fossil record of some marine groups provides the opportunity to reconstruct the structure and dynamics of benthic communities during different phases of human influence (e.g. pre‐human, prehistoric harvesting, and modern harvesting).
• 4. Preliminary comparisons of fossil versus modern bivalve assemblages suggest marked changes in the species composition. Human impacts seem very recent and shifts in the structure of benthic assemblages may have occurred only a few centuries/decades ago.
• 5. In contrast, prehistoric harvesting, although intense, was apparently not enough to cause a profound impact on coastal ecosystems. The approach herein envisaged can provide the basis to build a historical baseline to evaluate the human impacts on the coastal biodiversity in the region. Copyright © 2009 John Wiley & Sons, Ltd.

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Diana Maria Cuesta‐Gomez  Juan Pablo Lazo  M. del Pilar Snchez‐Saavedra 《Aquaculture Research》2020,51(8):i-i

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Selecting and ranking areas for conservation of Aegla (Crustacea: Decapoda: Anomura) in southern South America integrating biogeography,phylogeny and assessments of extinction risk     

Georgina Tumini  Federico Giri  Vernica Williner  Pablo A. Collins  Juan J. Morrone 《水产资源保护:海洋与淡水生态系统》2019,29(5):693-705

Description and molecular phylogeny of one new and one known needle nematode of the genus <Emphasis Type="Italic">Paralongidorus</Emphasis> (Nematoda: Longidoridae) from grapevine in Portugal using integrative approach     

Carlos Gutiérrez-Gutiérrez  Manuel Mota  Pablo Castillo  Margarida Teixeira Santos  Juan E. Palomares-Rius 《European journal of plant pathology / European Foundation for Plant Pathology》2018,151(1):155-172

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Mechanisms of glyphosate resistance and response to alternative herbicide‐based management in populations of the three Conyza species introduced in southern Spain          下载免费PDF全文

Ignacio Amaro‐Blanco  Pablo Tomás Fernández‐Moreno  María Dolores Osuna‐Ruiz  Fernando Bastida  Rafael De Prado 《Pest management science》2018,74(8):1925-1937

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Baseline susceptibility of Mediterranean strains of Trialeurodes vaporariorum (Westwood) to cyantraniliprole          下载免费PDF全文

Inmaculada Moreno  Ana Belando  Carolina Grávalos  Pablo Bielza 《Pest management science》2018,74(7):1552-1557

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Depth matters for bivalve culture in integrated multitrophic aquaculture (IMTA) and other polyculture strategies under non-eutrophic conditions     

Carlos Sanz-Lazaro  Victoria Fernandez-Gonzalez  Pablo Arechavala-Lopez  David Izquierdo-Gomez  Elena Martinez-Garcia  Pablo Sanchez-Jerez 《Aquaculture International》2018,26(5):1161-1170

Bivalve cultivation, in single cultivation or in polyculture (including integrated multitrophic aquaculture; IMTA), is generally limited to eutrophic waters. We carried out a modeling study to test if, under meso- and oligotrophic conditions, depth could be a key factor for bivalve productivity associated to IMTA and other polyculture strategies. We applied the model Farm Aquaculture Resource Management (FARM) at three strata of the water column in two coastal fish farm areas in the Mediterranean Sea, using water column variables sampled seasonally to estimate the potential mussel production. According to FARM, mussel production was high in both areas and, in some cases, almost doubled when mussels were cultured below 25-m depth compared to shallower levels. Phytoplankton abundance is expected to notably influence mussel production compared to particulate organic matter. Thus, in meso- and oligotrophic stratified waters, where chlorophyll maximum is relatively deep, depth can be a key factor for the productivity of mussel cultivation. The obtained results could help to maximize the production of suspension-feeding bivalve cultivation and, therefore, the expansion and development of sustainable aquaculture in non-eutrophic marine waters.  相似文献   

Effect of potassium and manganese phosphites in the control of Pythium damping‐off in soybean: a feasible alternative to fungicide seed treatments          下载免费PDF全文

Marcelo A Carmona  Francisco J Sautua  Pablo E Grijalba  Mariano Cassina  Oscar Pérez‐Hernández 《Pest management science》2018,74(2):366-374

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不同碳氮有机物料对有机菜田土壤细菌多样性的影响   总被引：1，自引：1，他引：0  

杨昊  PabloGonzalezPerez  张瑞  叶俊  蔡保松  黄丹枫 《上海交通大学学报(农业科学版)》2016,(1):36-44

通过模拟试验,利用聚合酶链式反应-变性梯度凝胶电泳法(PCR-DGGE),研究了施入不同碳氮有机物料(秸秆、苜蓿、有机肥、尿素)56d后,有机生产系统菜田土壤细菌群落结构的特征。结果表明,常规和有机生产系统土壤的细菌群落结构有明显差异。由DGGE图谱ShannonWiener多样性指数分析得知,有机背景处理的细菌多样性整体高于常规背景处理,且有机生产系统土壤加秸秆处理(OS)多样性最高,加入尿素后细菌多样性降低,相反,加入苜蓿后细菌多样性升高。非加权组平均法(UPGMA)聚类分析将常规和有机背景土壤分为两大族群。DGGE条带测序和系统进化树表明,30个条带归属为Proteobacteria、Acidobacteria、Actinobacteria、Firmicutes、Verrucomicrobia。常规土壤加苜蓿(CA)处理出现的特征性条带B13与有机背景处理的共有条带B28分别与Bacillus属和Pseudomonas假单胞菌属同源性最高。  相似文献