Hypoxia is a significant source of metabolic stress that activates many cellular pathways involved in differentiation, proliferation, and cell death. also major component human diseases, known driver cancers. Despite the challenges posed by hypoxia, there are animals display impressive capacity to withstand lethal levels hypoxia for prolonged periods time, thus offer gateway more comprehensive understanding hypoxic response vertebrates. The weakly electric fish genus Brachyhypopomus inhabits...

Abstract Objective Silver Chub Macrhybopsis storeriana is a small riverine minnow endemic to North American fresh waters. Its range extends from the southern USA southcentral Canada; latter includes rare lacustrine population in Lake Erie. Anthropogenic activities pose an immediate threat several populations, currently categorized special concern threatened at state level and federally provincially not‐at‐risk endangered Canada. Several studies have examined anthropogenic causes for decline...

Abstract Aim The Guiana Shield region exhibits extraordinary topography that includes sheer, flat‐topped mountains (tepuis) atop an upland platform. Rivers of the eastern Pakaraima Mountains descend to Atlantic coastal lowlands, often traversing spectacular rapids and waterfalls. For fish species distributed in both uplands it is unclear whether these waterfalls present population or biogeographical boundaries. We sought test this using geographically widespread banded‐electric knifefish (...

The ability to generate and detect electric fields has evolved in several groups of fishes as a means communication, navigation and, occasionally, predation. energetic burden required can account for up 20% fishes' daily energy expenditure. Despite this, molecular adaptations that enable meet the metabolic demands bioelectrogenesis remain unknown. Here, we investigate evolution mitochondrial oxidative phosphorylation (OXPHOS) complexes two most diverse clades weakly fishes—South American...

Active electroreception-the ability to detect objects and communicate with conspecifics via the detection generation of electric organ discharges (EODs)-has evolved convergently in several fish lineages. South American fishes (Gymnotiformes) are a highly species-rich group, possibly part due evolution an (EO) that can produce diverse EODs. Neofunctionalization voltage-gated sodium channel gene accompanied electrogenic tissue from muscle resulted novel (scn4aa) uniquely expressed EO. Here, we...

Three complete mitochondrial genomes of South American electric fishes (Gymnotiformes), derived from high-throughput RNA sequencing (RNA-Seq), are reported herein. We report the genome bluntnose knifefish Brachyhypopomus n.sp. VERD, determined newly sequenced data. also provide for Sternopygus arenatus and eel Electrophorus electricus, assembled previously published transcriptome The electricus have 13 protein-coding genes, 1 D-loop, 2 ribosomal RNAs 22 transfer RNAs, 16,547, 16,667 16,906...

ABSTRACT A fundamental challenge for both sustainable fisheries and biodiversity protection in the Neotropics is accurate determination of species identity. The coastal sharks Guyana poorly understood, but these are subject to artisanal fishing as well harvesting by industrialized offshore fleets. To determine what frequently caught consumed along coastline Guyana, we used DNA barcoding identify market specimens. We sequenced mitochondrial co1 gene 132 samples collected from six markets,...

The objectives of this work were detection the role two pheromones types, Rhynchjel and Rinocab, in limitation control on infestation with red palm weevil (RPW), Rhynchophorus ferrugineus Olivier, (Coleoptera: Curculionoidea: Dryophthoridae).The obtained results from 5traps for pheromone 30 traps Rinocab at various locations Belbeis district (Sharkia Governorate) Ashmoun (Menoufia indicated that each types obviously attracted different number RPW adults throughout year.The also showed...

Abstract We used mitochondrial DNA to assess the genetic structure of endangered lake chubsucker Erimyzon sucetta across its Canadian range. found unique haplotypes in Lyons Creek, a tributary Niagara River that faces strong potential for habitat deterioration. Creek may therefore serve as reservoir diversity. The sensitivity combined with uniqueness E. population, call further investigation into whether this population should be considered separate designatable unit conservation purposes.

Data in metal shield revealed, that termites failed to cross through the of Galvanized iron throughout tested period, recorded zero%.Termite tunneled sand layer during seven days and individual died inside tunnels, showed an inability move tunnels after first week.In case test breaking glass barrier data crossed 3 at rate 0.6 7 30 1.4 with average 0.4% one tunnel created on body transparent box from inside.Data thick plastic bags 15 termite counted 11 individuals 2.2 19 3.8 days, 1.2% all...

The catched termites of untreated areas at first year 2009 showed highly population subterranean Psammotermes hypostoma (Desn.), when compared with second 2010 in soil treated insecticides the location A and B all tested insecticides.In 2 nd data (insecticides water solvent), were more toxic than case kerosene solvent).Chlorpyrifos was best for decreased termite individuals followed by cypermethrin fipronil A, while insecticide rank chlorpyrifos B. Chlorpyriphos found amount residues...

This work conducted in Sharkia Governorate, data showed that, the highest number of foraged workers Anacanthotermes ochraceus (Burm), was found during spring and autumn, 2014, lowest occurred summer season, numbers begun increased gradually January, February, March, April May, then decreased Jun, July August.Workers caste represented (77.73% total colony).Nymphs largest least summer, Jan., Jun-July Nov-Dec.Nymphs (13.36% colony).Soldiers were autumn Sept., winter Nov.-Feb., began to rise...

The population density of Macrotoma palmata F. (Coleoptera: Cerambycidae), attacking Navel orange trees, were monitored at Sharkia governorate during the two successive years 2012 and 2013.The activity seasonal fluctuation in M. on trees started from 2 nd half May to October or 1 st November 2013.Summer recorded maximum flight (0.94-1.00 beetles/tree), followed by autumn (0.19-0.21 beetle/tree) spring (0.08-0.10 beetle/tree), stopped winter.The total number emerged beetles per year averaged...

The results based on certain biological aspects showed that plum branches were the more attractiveness to Scolytus amygdali Guér beetles, while pear least attractiveness.The beetles rearing constructed longest egg gallery, deposited highest number of eggs and gave progeny, reared built shortest length laid produced progeny.The duration generation occurred for apple branches, appeared duration.On other hand, peach period adult emergence, branches.

Field experiment was conducted in year 2016 for the first time Egypt, at Sangha, Kafr Saqr, Sharkia Governorate, to study some physical barriers " Metal shield, breaking glass, thick plastic bags, gravel and with termiticide against subterranean termite, Psammotermes hybostoma (Desneux).Data showed that, metal shields (Galvanized iron) were strong prevent termite attack, followed by bags barrier which crossing five months; then glass where able creative tunnels from which, while failed...

The obtained results of soil treatments against Psammotermes hypostoms (Desn.),indicated that, the three tested insecticides in different groups; chlorpyrifos, fipronil and cypermethrin were highly toxic sub-surface layers treated contains particle size >850µm more than other sizes 425 250µm, respectively, fine was safety to ground water.Fipronil showed effect, followed by respectively.In coarse insecticides.The chemical determination residues, data indicated that chlorpyrifos save for water...

Treatment with topical application showed that the pyrethroids group, (Cypermethrin) was highest toxic against subterranean termites Psammotermes hypostoma (Desn.)after 12 hr.where recorded (LD50 value = 0.056001 and LD90 reached to 0.59557 μg/worker), followed by chlorpyrifos, 0.08066 0.42698 fipronil in last rank where 0.089141 1.33442 μg/worker).Data after 24 hr.indicated again that, cypermethrin first acute toxicity, while come next chlorpyrifos 0.02265, 0.026085 0.0393 μg/worker...

The tunneling ability of termites P. hypostoma (Desn.), with treated particle sizes soil resulted that; the distance and number branching were highest large size, while was less at small size insecticides.The fine more toxic died quickly in tunnels than coarse soil.Tunneling activity decreased by concentration increases.Treated cypermethrin showed to prevention followed fipronil chlorpyrifos, respectively.On other hand highly density suitable quantity added water principal factors...

The results of washing on treated soil with insecticides against subterranean termites Psammotermes hypostoma (Desnuax),indicated that, the first washed were highly efficacy and quicker in killed all tested particle sizes than second third, respectively, small size more toxic others soil, while was lower respectively.Also cypermethrin showed toxic, followed by fipronil chlorpyrifos, respectively.The coarse third fine, to consider safety water table, also samples analysis indicated...