Effect of inbreeding and heritability of sperm competition success in the bulb mite Rhizoglyphus robini

Sperm competition is a potent evolutionary force shaping the reproductive biology of most animal species. Here, we estimated the heritability of sperm competition success in the promiscuous bulb mite Rhizoglyphus robini. Sperm competition success was measured with the sterile male technique as the proportion of eggs fertilised by the second of three males mated with a single female. Sperm competition success responded significantly to selection. The heritability estimated from the response to five generations of selection was 0.13. We also estimated the effect of inbreeding on sperm competition success. Males produced by sib-mating (F=0.25) had a significantly lower sperm competition success than outbred males. The estimated coefficient of inbreeding depression was 0.53. Such high inbreeding depression together with moderately low heritability is consistent with the view that sperm competitive ability is under strong directional selection and strongly influences the reproductive success of males

Strong association between a single gene and fertilization efficiency of males and fecundity of their mates in the bulb mite.

Although variation in male fertilization efficiency has been shown to have a genetic basis in several species, the genes responsible for the effect are generally unknown. Here, we show a strong association between the fertilization success of males and their phosphogluconate dehydrogenase (Pgdh) genotype in the bulb mite Rhizoglyphus robini. Males homozygous for the slow (S) allele fathered a significantly greater proportion of offspring when competing with males homozygous for the fast (F) allele. There was no evidence that female fecundity was influenced by their Pgdh genotype. The fecundity of FF females did not differ significantly from the fecundity of SS females but female fecundity was significantly influenced by the genotype of their mate. Females paired with SS males laid significantly fewer eggs than females paired with FF males. Altogether these data show a trade-off, with the male SS genotype associated with their higher fertilization efficiency but at the cost of a negative impact on the fecundity of females mating with them

Reduction of speech signal deformation in patients after nasal septum surgery (Septolplasty)

Nasal blockage belongs to the most common symptoms of nasal diseases in vocal tract area. At the same frequency there appear acoustic symptoms, existing as the change of human voice color. Vocal and articulation disorders of the ear, nose ane throat are usually observed in the form of closed rhinolalia and this observation can be performed both by patients and other listeners as well. Nasal polyps and nasal septum deviation are frequent reason of nasal blockage connected in consequence with decreased nasal ventilation. One of the main principles of the surgical treatment performed in mentioned situations is the restoration of nasal patency. The evaluation of the influence of nasal surgery on intensification of acoustic symptoms depends on verification of parameters of the human speech signal, so it was necessary to apply objective methods. That allowed to combine results of acoustic analysis with patient's subjective feeling and rhinomanometric evaluation of nasal patency. The main purpose of this research was to objectively evaluate the influence of surgical treatment improving nasal patency on deformation of the voice of operated patients

First approach to studies of sulphur electron DOS in prostate cancer cell lines and tissues studied by XANES

Abstract Urological cancers comprise approximately one-third of all cancers diagnosed in men worldwide and out of these, prostate cancer is the most common one ( WHO World Cancer Report, 2008 ). Several risk factors such as age, hormone levels, environmental conditions and family history are suspected to play a role in the onset of this disease of otherwise obscure aetiology. It is therefore the medical need that drives multidisciplinary research in this field, carried out by means of various experimental and theoretical techniques. Out of many relevant factors, it is believed that sulphur can take an important part in cancer transformations. We have investigated the prostate cancer cell lines and tissues, along with selected organic and inorganic compounds used as references, by the X-ray absorption fine structure spectroscopy near the sulphur edge energy region. Particularly, the comparison of the experimental results collected during XANES measurements and theoretical calculations of electron density of states with use of the FEFF8 code and LAPW (linearised augmented plane-wave) method has been performed and in this work the first results of our studies are presented

Lawson criterion for ignition exceeded in an inertial fusion experiment

For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

The sexually selected sperm hypothesis, maternal effects, and sperm competitive success in the bulb mite Rhizoglyphus robini

ABSTRACT Background: The sexually selected sperm hypothesis predicts that selection will favour female multiple mating by increasing the sperm competitive abilities of their sons. Hypothesis: Sons of multiply mated females should have higher sperm competitive abilities than sons of singly mated females. Organism: The bulb mite, Rhizoglyphus robini (Acari: Acaridae). Methods: Rhizoglyphus is a highly promiscuous species in which females gain no direct benefits from multiple matings. Virgin females were mated to one or six males. Sons of singly and multiply mated females were allowed to compete with each other for access to females' ova. Sperm competitiveness was estimated by the sterile male method. Results: Contrary to the predictions of the hypothesis, we found no difference in sperm competitiveness between sons of singly and multiply mated females. We suggest that non-genetic effects could explain this result

Media Intellectualism or Lived Catastrophe? Mediating and Suspending the A/political Act

Piotr Szczęsny set himself on fire in protest of the Polish government in October 2017. Charged with political orientation, his selfimmolation posed a challenge to the news media, forcing it deep into the gutter the suicide archive, where commentators debated appropriate aesthetics of protest in a country whose imagery imagery is predominately thanatic; in a nation-state that has been resurrected after its many occupations yet still remains within a sacrificial grave, with death as the cornerstone of community. In this article, I situate Szczęsny’s death within the nightmare-bound post-Soviet political scene through historically contextualizing the debate around his suicide, where the act itself was criticized on the basis of its inappropriate aesthetics of irrational selfharm. I argue that such binding of a/political catastrophe in a bundle of representations corresponds to what François Laruelle calls media intellectualism, a form of engaging suffering that relies on its mediation. Seeking an alternative discourse of engaging the a/political act, I look to Katerina Kolozova’s non-standard politics of pain and to Oxana Timofeeva’s work on “the catastrophe.” These positions, which I call stances of the unsubject, offer us different starting points for creating solidarity in spaces of void, pain and depression. For the unsubject, pain is the prerequisite for forming the political, albeit in a non-standard manner, where politics cannot oscillate around representations, ideologies or identities. Rather than mediate self immolation, I ask whether the way that we define “the political” could benefit from a subtraction of mediation, from a catastrophic thinking in parallel with the brutality of the real, rather than the repetition of (national) trauma.&#x0D; Author(s): Bogna M. Konior:&#x0D; Title (English): Media Intellectualism or Lived Catastrophe? Mediating and Suspending the A/political Act&#x0D; Journal Reference: Identities: Journal for Politics, Gender and Culture, Vol. 15, No. 1-2 (Summer 2018)&#x0D; Publisher: Institute of Social Sciences and Humanities – Skopje &#x0D; Page Range: 166-185&#x0D; Page Count: 20&#x0D; Citation (English): Bogna M. Konior, “Media Intellectualism or Lived Catastrophe? Mediating and Suspending the A/political Act,” Identities: Journal for Politics, Gender and Culture, Vol. 15, No. 1-2 (Summer 2018): 166-185.</jats:p

Letters to the Media of October 20, 2017

Along with the leaflet, Piotr Szczęsny wrote two short letters, referred to as “Letters to the Media.” They were handed over by Szczęsny’s family to the major media outlets and published on October 20, 2017. The translation is based on the original publication in Oko.Press, October 20, 2017, www.oko.press/piotr-s-szary-czlowiek-zyje-czescpamieci.&#x0D; Author(s): Piotr Szczęsny&#x0D; Title (English): Letters to the Media of October 20, 2017&#x0D; Translated by (Polish to English): Bogna M. Konior&#x0D; Journal Reference: Identities: Journal for Politics, Gender and Culture, Vol. 15, No. 1-2 (Summer 2018)&#x0D; Publisher: Institute of Social Sciences and Humanities – Skopje &#x0D; Page Range: 164-165&#x0D; Page Count: 2&#x0D; Citation (English): Piotr Szczęsny, “Letters to the Media of October 20, 2017,” translated from the Polish by Bogna M. Konior, Identities: Journal for Politics, Gender and Culture, Vol. 15, No. 1-2 (Summer 2018): 164-165.</jats:p