179 research outputs found

    The oscar, Astronotus ocellatus (Agassiz, 1831) (Cichlidae): a deliberate aquarium trade introduction in the Euphrates River, Iraq

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    The first record of a single specimen of oscar, Astronotus ocellatus, native to Amazon basin of Peru, Colombia and Brazil, is reported from the inland waters of Iraq. The specimen was caught from one of the branches of the Euphrates River to the east of the Barnun city, ca. 5 km to the NW of Hilla city in Babylon Province in central Iraq in December 2021 using rod and line. The capture of a sub-adult specimen, 186.7 mm in total length, indicates the first record of another aquarium fish species in the freshwater system of Iraq. The aquarium trade pathway is the suspected factor for the presence of this species in the Iraqi freshwater area

    New localities of the Eurasian otter Lutra lutra (Linnaeus, 1758) in the upper Euphrates river basin, a remarkable range extension in western Iraq

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    Records of the Eurasian Otter (Lutra lutra) have been confined to the waterbodies of southern, central, and northern Iraq (Kurdistan). Although its status in the Upper Euphrates River Basin in western Iraq is not fully explored, it seems to be rare. In August 2019, two adult Eurasian otters were reported from two new localities in Anbar Province after being strangled by fishing nets. These records represent the first photographic evidence for a remarkable range extension of the Eurasian Otter distribution range in western Iraq

    The oscar, Astronotus ocellatus (Agassiz, 1831) (Cichlidae): a deliberate aquarium trade introduction in the Euphrates River, Iraq

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    The first record of a single specimen of oscar, Astronotus ocellatus, native to Amazon basin of Peru, Colombia and Brazil, is reported from the inland waters of Iraq. The specimen was caught from one of the branches of the Euphrates River to the east of the Barnun city, ca. 5 km to the NW of Hilla city in Babylon Province in central Iraq in December 2021 using rod and line. The capture of a sub-adult specimen, 186.7 mm in total length, indicates the first record of another aquarium fish species in the freshwater system of Iraq. The aquarium trade pathway is the suspected factor for the presence of this species in the Iraqi freshwater area

    Recent Sighting of Smooth-Coated Otter Lutrogale perspicillata maxwelli in Hawizeh Marsh (Southern Iraq)

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    Since 1956, there were very few sightings of Iraq Smooth-coated Otter (Lutrogale perspicillata maxwelli) especially after the Iraqi marshlands inundation. In April 2015, an adult male Iraq Smooth-coated Otter was trapped near Al-Edheam, in the northern part of Hawizeh Marsh (Southern Iraq). The recent sighting along with present photographic record represents very rare evidence documenting the occurrence of L. p. maxwelli otter in Iraq since the1950s

    Differences in fundamental reaction mechanisms between high and low-LET in recent advancements and applications of ionizing radiation

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    International audienceRecent applications of high-LET radiation include boron neutron capture therapy. UV treatment of electron-irradiated UHMWPE impedes degradation caused by allyl radicals. Radiation synthesis of PVP nanogels above 55 1C leads to intra-molecular crosslinking. PCBs in contaminated sediments can be dechlorinated by reactions with hydrated electrons. a b s t r a c t Differences among the mechanisms of energy deposition by high-linear energy transfer (LET) radiation, consisting of neutrons, protons, alpha particles, and heavy ions on one hand, and low-LET radiation, exemplified by electron beam and gamma radiation on the other, are utilized in the selection of types of radiation used for specific applications. Thus, high-LET radiation is used for modification of carbon nanotubes, ion track grafting, and the synthesis of membranes and nanowires, as well as for characterization of materials by means of neutron scattering. Recent applications of low-LET irradiation include minimization of radiolytic degradation upon sterilization of ultra-high molecular weight polyethylene (UHMWPE), radiolytic synthesis of nanogels for drug delivery systems, grafting of polymers in the synthesis of adsorbents for uranium from seawater, and reductive remediation of PCBs

    The Permian-Triassic Boundary in the Kurdistan Region of Northern Iraq

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    The well-preserved Upper Permian-Lower Triassic succession in the Kurdistan region of northern Iraq has provided an opportunity to study the Permian-Triassic boundary. This study presents the first ever stable isotope data for these rocks. One hundred and sixty-five samples from the Ora-Beduhe and CZO sections located within the Ora structure in the Thrust Zone were studied for lithological, stable isotope, trace fossil and invertebrate fossil variations.  Carbon and oxygen isotopic signals (d13C, d18O) and %CaCO3 indicate dramatic changes within the CZO section (between samples 29 and 30) where d13C records a negative excursion of 6‰ VDP in a portion of the section previously interpreted as late Permian. The P-T boundary matching the lithic changes and extinction of Permian fauna, in addition to another boundary or contact were identify between (samples 16 and 17) which is marked due to severe decreasing in late Permian fauna and appearance of early Triassic. Paleontological record suggests a gradational extinction pattern for the boundary in northern Iraq. Faunal changes are consistent with other regional and global studies for the Permian-Triassic boundary. Keywords: Permian-Triassic boundary, Kurdistan, Northern Iraq, Stable Isotopes, Neo-Tethy

    Investigation of ancient DNA to enhance natural history museum collections: misidentification of smooth-coated otter (Lutrogale perspicillata) specimens across multiple museums

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    Historical and modern natural museum collections are storehouses of extraordinary value for scientific research in a wide range of fields. Recent advances in molecular biotechnology (e.g., next generation genomics) have increased the range of collection material employable for DNA-based analyses to unprecedented levels. Nevertheless, the value of museum specimens strictly depends on reliability of data associated with them. We report on investigations of ancient DNA from specimens of smooth-coated otter (Lutrogale perspicillata, Mustelidae), the largest otter species living in Asia, in US and European mammal collections. Mitochondrial DNA Cytochrome-b gene sequencing proved that the studied specimens were not the expected taxon. Indeed, they actually belonged to three different species, namely the Asian small-clawed (Aonyx cinereus), Eurasian (Lutra lutra) and African clawless (Aonyx capensis) otters. This represents the first record of mustelid misidentification from museum collections. Detection of errors can be extremely difficult when based only on collectors’ notes and data. Hence, we warn scientists involved in otter research about potential challenges when dealing with museum specimens. We recommend curators pursue a multidisciplinary approach, including DNA analyses, to accurately catalogue the resources under their management and uphold the value of biodiversity information
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