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80 results for “Oreochromis”
Untargeted LC–MS metabolomics reveals an adverse effect of high-fat diet on hepatic metabolism of Oreochromis niloticus
<p>Hepatic steatosis commonly occurs in intensively farmed tilapia. This disease is harmful to fish growth and health, but knowledge of the metabolic changes in tilapia with fatty liver is limited. In the present study, we compared genetically improved farmed tilapia (GIFT, <em>Oreochromis niloticus</em>) fed a high-fat diet (HFD) with those fed a normal-fat diet (NFD) for 8 weeks using LC-MS-based hepatic metabolomic assays and traditional nutritional assessments. Juvenile GIFT fed a HFD displayed higher fat disposition in the liver than did those fed a NFD. The metabolomic analyses revealed 61 differentially accumulated metabolites between the groups, and these metabolites were involved in 37 signaling pathways. Our results illustrate the development of metabolic disorders related to various hepatic biological processes, including protein metabolism, lipid metabolism, carbohydrate metabolism, and nucleotide metabolism in HFD-fed GIFT. These physiological changes may be related to the lower growth rate of GIFT. Overall, our study reveals the metabolic disorders in GIFT fed HFD, and enhance our knowledge of the mechanism of fatty liver formation in GIFT.</p>
Data from: Development of Diversity Arrays Technology markers as a tool for rapid genomic assessment in Nile tilapia, Oreochromis niloticus
The development of genomic markers is described for Nile tilapia, Oreochromis niloticus, using the Diversity Arrays Technology (DArT) genotype-by-sequencing platform. A total of 13 215 single nucleotide polymorphism (SNP) markers and 12 490 silicoDArT (dominant) markers were identified from broodstock of two selective breeding programs [Genetically Improved Farmed Tilapia (GIFT) strain from Malaysia and the Abbassa strain from Egypt]. Over 10 000 SNPs were polymorphic in either strain, and 2985 and 3087 showed strain-specific polymorphisms for the GIFT and Abbassa strains respectively. We demonstrate the potential utility of these markers for rapid genomic screening and use in breeding programs.
Data from: Successive invasion-mediated interspecific hybridizations and population structure in the endangered cichlid Oreochromis mossambicus
Hybridization between invasive and native species accounts among the major and pernicious threats to biodiversity. The Mozambique tilapia Oreochromis mossambicus, a widely used freshwater aquaculture species, is especially imperiled by this phenomenon since it is recognized by the IUCN as an endangered taxon due to genetic admixture with O. niloticus an invasive congeneric species. The Lower Limpopo and the intermittent Changane River (Mozambique) drain large wetlands of potentially great importance for conservation of O. mossambicus, but their populations have remained unstudied until today. Therefore we aimed (1) to estimate the autochthonous diversity and population structure among genetically pure O. mossambicus populations to provide a baseline for the conservation genetics of this endangered species, (2) to quantify and describe genetic variation of the invasive populations and investigate the most likely factors influencing their spread, (3) to identify O. mossambicus populations unaffected by hybridization. Bayesian assignment tests based on 423 AFLP loci and the distribution of 36 species-specific mitochondrial haplotypes both indicate a low frequency of invasive and hybrid genotypes throughout the system, but nevertheless reveal evidence for limited expansion of two alien species (O. niloticus and O. andersonii) and their hybrids in the Lower Limpopo. O. mossambicus populations with no traces of hybridization are identified. They exhibit a significant genetic structure. This contrasts with previously published estimates and provides rather promising auspices for the conservation of O. mossambicus. Especially, parts of the Upper Changane drainage and surrounding wetlands are identified as refugial zones for O. mossambicus populations. They should therefore receive high conservation priority and could represent valuable candidates for the development of aquaculture strains based on local genetic resources.
FIGURE 49. Oreochromis mossambicus, ROM 22180, 151 in Annotated list and key to the stream fishes of Trinidad & Tobago
FIGURE 49. Oreochromis mossambicus, ROM 22180, 151 mm SL, Maple fish hatchery, ON, from Trinidad stock.
Primary hepatocyte culture from Oreochromis niloticus fish as a tool for environmental toxicology
<p>Accumulated chemicals have been impairing water quality over decades of human activities. Organisms such as fish are often used for risk assessment, as chemical analysis is insufficient to assess the impact on health. Consequently, researchers have faced challenges in ecotoxicology, concerning the use of animals. Primary and cell line cultures are good alternatives for reducing animal use. This study aims to evaluate the use of primary hepatocytes culture from Oreochromis niloticus as an in vitro tool for screening environmental contaminants and pollutants. Metal cadmium (Cd) is the pollutant model.</p>
Data from: Genetic diversity of Nile tilapia (Oreochromis niloticus) throughout West Africa
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Untargeted LC–MS metabolomics reveals an adverse effect of high-fat diet on hepatic metabolism of Oreochromis niloticus
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Data from: Development of Diversity Arrays Technology markers as a tool for rapid genomic assessment in Nile tilapia, Oreochromis niloticus
Open the record for dataset details and reuse information.
Data from: Successive invasion-mediated interspecific hybridizations and population structure in the endangered cichlid Oreochromis mossambicus
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Oreochromis alcolapia alcalica development
<p>The onset of heart beat during the development of the cichlid Oreochromis (Alcolapia) alcalicus.</p>
Whole genome resequencing data enables a targeted SNP panel for conservation and aquaculture of Oreochromis cichlid fishes
<p>Cichlid fish of the genus <i>Oreochromis</i> form the basis of the global tilapia aquaculture and fisheries industries. Broodstocks for aquaculture are often collected from wild populations, which in Africa may be from locations containing multiple <i>Oreochromis </i>species. However, many species are difficult to distinguish morphologically, hampering efforts to maintain good quality farmed strains. Additionally, non-native farmed tilapia populations are known to be widely distributed across Africa and to hybridize with native <i>Oreochromis </i>species, which themselves are important for capture fisheries. The morphological identification of these hybrids is particularly unreliable. Here, we describe the development of a single nucleotide polymorphism (SNP) genotyping panel from whole-genome resequencing data that enables targeted species identification in Tanzania. We demonstrate that an optimized panel of 96 genome-wide SNPs based on F<sub>ST</sub> outliers performs comparably to whole genome resequencing in distinguishing species and identifying hybrids. We also show this panel outperforms microsatellite-based and phenotype-based classification methods. Case studies indicate several locations where introduced aquaculture species have become established in the wild, threatening native <i>Oreochromis</i> species. The novel SNP markers identified here represent an important resource for assessing broodstock purity in hatcheries and helping to conserve unique endemic biodiversity.</p>
Figure 7 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 7. – Demographic structure of the exploited stock of Oreochromis niloticus by fishermen at the Nam Theun 2 Reservoir in Lao PDR between March and December 2016.
Figure 5 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 5. – Von Bertalanffy growth curve adjusted to the age-standard length of Oreochromis niloticus from the Nam Theun 2 Reservoir in Lao PDR between November 2015 and January 2017.
Figure 4 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 4. – Length-weight relationship of Oreochromis niloticus from the Nam Theun 2 Reservoir in Lao PDR between November 2015 and January 2017 according to sex.
Figure 3 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 3. – Monthly frequency evolution of the translucent and opaque zones at the edge of otoliths from Oreochromis niloticus from the Nam Theun 2 Reservoir in Lao PDR based on transversal section readings; the number of sampled specimens is given at the top of the figure for each month (N).
Figure 2 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 2. – Transverse section of otolith (sagittae) from a 6+ yearold Oreochromis niloticus from the Nam Theun 2 Reservoir in Lao PDR. The section was stained with toluidine blue and viewed using reflected light: the coloured translucent zones are counted along the sulcus axis. Core (C), translucent stainable zone (TZ), opaque zone (OZ), ventral face (V), dorsal face (D), external face (E), and internal face (I).
Figure 1 in Life history traits of the exploited Nile Tilapia (Oreochromis niloticus - Cichlidae) in a subtropical reservoir (Lao PDR)
Figure 1. – Map of the Nam Theun 2 Reservoir in Lao PDR at its higher level (538 m a.s.l) and localization of sampling sites (black dots) by experimental gillnet fishing and of villages (black stars) for the monitoring of landing/fishing effort.
Figure 3 in Comparative anatomical studies on the cranial nerves of the fully formed embryos of the Nile tilapia Oreochromis niloticus (Ostiechthyes-Cichlidae). I. Nervus glossopharyngeus
Figure 3. Photomicrograph of part of a transverse section of Oreochromis niloticus passing through the postorbital region showing the glossopharyngeal foramen. X40.
Figure 1 in Comparative anatomical studies on the cranial nerves of the fully formed embryos of the Nile tilapia Oreochromis niloticus (Ostiechthyes-Cichlidae). I. Nervus glossopharyngeus
Figure 1. Graphic reconstruction of nervus glossopharyngeus of Oreochromis niloticus in a lateral view. CE. Cerebellum. G.P. Petrosal ganglion. MO. Medulla Oblongata. N.AAB.1 Nerve to the 1st adductor arcus brachialis muscle. N.CSY. Cranial sympathetic nerve. N.EP.L. Nerve to the epithelial lining.N.ILAB.1 Nerve to the 1st internal levator arcus branchialis muscle. N.OV.1 Nerve to the 1st obliquus ventralis muscle.N.PSB. Nerve to pseudobranch.N.IX Nervus glossopharyngeus Nn.ELAB.1 Nerves to the first external levator arcus branchialis muscle.Nn.EP.L. Nerves to the epithelial lining. Nn.GFM. Nerves to the gill filament muscles. Nn.Gr.+EP.L. Nerves for gill rakers and the epithelial lining. Nn.PSB. Nerves to the pseudobranch. R.CM.IX+N.CSY. Ramus communicans of the glossopharyngeal nerve and the cranial sympathetic nerve. R.PH.IX Ramus pharyngeus of nervus glossopharyngeus. R.PR. IX Ramus pretrematicus of nervus glossopharyngeus. R.PT.IX Ramus posttrematicus of the glossopharyngeal nerve. R.SY.IX Ramus sympathetic connecting the glossopharyngeal nerve. RO.IX Glossopharyngeal root. Rr.PT.+PR.IX Rami posttrematicus and pretrematicus of the glossopharyngeal nerve.
Figure 7 in Comparative anatomical studies on the cranial nerves of the fully formed embryos of the Nile tilapia Oreochromis niloticus (Ostiechthyes-Cichlidae). I. Nervus glossopharyngeus
Figure 7. Photomicrograph of part of a transverse section of Oreochromis niloticus passing through the postotic region showing the separation of the rami pretrematicus and posttrematicus of nervus glossopharyngeus. The nerve to the adductor arcus branchialis is shown. X60.AU.C. Auditory capsule.B. Brain.C.CB.1 The first ceratobranchial cartilage. C.EB.1 The first epibranchial cartilage. EP.A2 The second epibranchial artery. G.P. Petrosal ganglion. GR. Gill Raker. IJV. internal jugular vein. M.AAB.1 First adductor arcus branchialis muscle. N.AAB.1 Nerve to the 1st adductor arcus brachialis muscle. N.CSY. Cranial sympathetic nerve. PSB. Pseudobranch. R.PH.IX Ramus pharyngeus of nervus glossopharyngeus. R.PR.IX Ramus pretrematicus of nervus glossopharyngeus. R.PT.IX Ramus posttrematicus of the glossopharyngeal nerve. R.SY.IX Ramus sympathetic connecting the glossopharyngeal nerve. Rr.PT.+PR.IX Rami posttrematicus and pretrematicus of the glossopharyngeal nerve.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
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