Sentences with phrase «altered sex ratios»
«The research raises the possibility that many other aquatic species could be affected by road salts in sub-lethal ways, not only in terms of altered sex ratios, but potentially in many other traits.»
https://news.rpi.edu/
They also found that exposure to the leaf litter from a common trees species, oak, significantly altered the sex ratios in the frog populations and, in some cases, the size of individual females.
For example, by biasing inheritance toward the production of one sex over another, altered sex ratios might eventually cause a population to peter out.
He continued, «Studies performed in later pregnancy beyond the first trimester have shown a slight sex difference in the main level of this hormone, so that female pregnancies tend to have a slightly higher level of this hormone, and we speculated... that if the same sex difference in this hormone level exists in the early part of the pregnancy, and if this hormone is truly related to the occurrence of morning sickness, then we would perhaps expect an altered sex ratio among women suffering from severe nausea.»
SPOTTED hyenas can drastically alter the sex ratio of their young from one litter to the next, say two American biologists.
Research published in November 2016 showed that sodium chloride can alter the sex ratios in populations of developing frogs.
Recent research was reported in an article in the Canadian Journal of Fisheries and Aquatic Sciences, which found that high levels of road salt can alter the sex ratios of frogs; an article in Environmental Toxicology and Chemistry, which documented the effects of road salt and a common insecticide on wetland food webs; and an article in Environmental Pollution, which examined potential interactions between road salt, predators, and competitors in wetland food webs.
PCBs are related to a class of compounds known as dioxins, specifically 2,3,7,8 - TCDD (tetrachloro - dibenzodioxin), which has been implicated as a cause of altered sex ratio, especially in relation to paternal exposures.
Our recent study published in Nature Climate Change found that by altering the sex ratio of turtle populations in favour of females, climate change could lead to a population increase in the short term.
Not exact matches
What is known from global studies is that exposure to biologically active compounds, even at ng / L concentrations, can impact endocrine systems in nature and manifest as negative impacts like altered gene regulation, the presence of mixed reproductive tissues (intersex) and skewed sex ratios.