Norwich, UNITED KINGDOM
She researches breeding and sexual reproduction – with a particular focus on genetics and genomics.
Ph.D., Evolutionary Biology
M.Sc., Evolutionary Biology
Hindustan Times online
Immler further added, “The sperm within an ejaculate vary not only in their shape and performance, but also in the genetic material that each of them carries. Until now, there was a general assumption that it doesn’t really matter which sperm fertilises an egg as long as it can fertilise it. But we have shown that there are massive differences between sperm and how they affect the offspring.”view more
New Scientist online
“I definitely do think this is relevant,” says team leader Simone Immler at the University of East Anglia in the UK. “We miss out on a lot of steps during artificial fertilisation technologies.”view more
Daily Mail online
Lead scientist Dr Simone Immler, from the University of East Anglia's School of Biological Sciences, said: 'We found that when we select for the longer-lived sperm within the ejaculate of male zebra fish, the resulting offspring is much fitter than their full siblings sired by the shorter-lived sperm of the same male.view more
Dr Simone Immler, a European Research Council Fellow in UEA's School of Biological Sciences, said: "We found that selection for longer-lived sperm produced offspring which had increased chance of survival and performed better as adults than their siblings sired by non-selected control sperm. Thus, it is possible to get rid of the lower quality sperm within an ejaculate through selection on sperm performance.view more
When the United Kingdom voted to leave the European Union on 23 June last year, the decision triggered a period of intense soul-searching and uncertainty, not least for a research community with strong and long-standing financial and social links to the continent. Worries about science funding, residency rights and even about racist attacks took root in laboratories across the country.view more
Limited resources and a possible trade-off between the repair and maintenance of the germ cells and growth and maintenance of the soma may explain the deterioration of the soma over time. Here we show that germline removal allows accelerated somatic healing under stress.
Post‐meiotic sperm ageing, both before ejaculation and after ejaculation, has been shown to negatively affect offspring fitness by lowering the rate of embryonic development, reducing embryonic viability and decreasing offspring condition. These negative effects are thought to be caused by intrinsic factors such as oxidative stress and ATP depletion or extrinsic factors such as temperature and osmosis.
Evolutionary rates and strength of selection differ markedly between haploid and diploid genomes. Any genes expressed in a haploid state will be directly exposed to selection, whereas alleles in a diploid state may be partially or fully masked by a homologous allele. This difference may shape key evolutionary processes, including rates of adaptation and inbreeding depression, but also the evolution of sex chromosomes, heterochiasmy, and stable sex ratio biases.
In polyandrous mating systems, females maintain the opportunity to bias male fertilization success after mating in a process known as cryptic female choice. Mechanisms of cryptic female choice have been described both in internal and external fertilizers, and may affect fertilization processes at different stages before, during, and after fertilization.
Sperm function and quality are primary determinants of male reproductive performance and hence fitness. The presence of rival males has been shown to affect ejaculate and sperm traits in a wide range of taxa. However, male physiological conditions may not only affect sperm phenotypic traits but also their genetic and epigenetic signatures, affecting the fitness of the resulting offspring.