Mammal that mates itself to death will struggle under climate change , scientists say
The yellow-footed antechinus is a marsupial has a rare and unusual mating behavior known as 'male semelparity.'Platypuses Are at Risk of Extinction, Experts Warn In the latest paper, the scientists found that if this marsupial experiences warmer temperatures during the early stages of its life, it may be less capable of adapting to and surviving the winter. The marsupials are born between September and November and so they spend their first months in the Australian summer and autumn, which are expected to become hotter under climate change. This could mean that many males will be unable to survive the winter in future, so would be incapable of mating. The scientists, led by Clare Stawski from the University of New England and the Norwegian University of Science and Technology, exposed captive-bred juveniles to either"cold" or"warm" temperatures—17 and 25 degrees Celsius (63 to 77 degrees Fahrenheit.) The mammals were about 100 days old at the beginning of this experiment, and had just finished being weaned by their mothers. Stawski and colleagues then monitored various factors such as body mass and the activity levels of the animals. Once the juveniles had reached adult size, at around 220 days of age, the scientists conducted a series of temperature tests and measured the basal metabolic rate—the number of calories required to keep the body functioning at the most basic level while it is resting—of the animals. In one test, the mammals were placed in a chamber where the temperature was 18 degrees Celsius. This was then increased by 4 degree Celsius increments every two hours, until the temperature reached 30 degrees. In the second test, the initial temperature in the chamber began at 14 degrees Celsius and was reduced to 10 degrees after three hours. The results showed that temperatures experienced by juvenile yellow-footed antechinuses during development can impact the behavior and physiology of the animal. Juveniles placed in the"cold" group just after being weaned were able to adapt their metabolic rate as the temperature around them changed. But the metabolic rate of those juveniles that had initially been placed in the warm group did not change when exposed to colder temperatures. Stock photo: A yellow-footed antechinus. iStock According to the researchers, this indicates that the juveniles raised in warm conditions may have less"phenotypic plasticity"—the ability of an organism to adapt to environmental influences. This has significant implications for the yellow-footed antechinus given temperatures in Australia are expected to rise with climate change, according to the Commonwealth Scientific and Industrial Research Organisation (CSIRO)—an Australian government agency. "We hypothesize that as individuals raised in warm conditions appear to have less phenotypic flexibility, they may not be able to respond effectively to prolonged increases in temperature and therefore struggle throughout winter," Stawski told ABC News . This lack of phenotypic plasticity in juveniles raised in warm conditions does not bode well for a species that is dependent on a single breeding event and experiences"a complete population turnover," the authors wrote in the study. This makes the species particularly vulnerable to potentially deadly environmental events, such as heatwaves, which are expected to become more common under climate change, according to CSIRO. If these events occur in the periods when there are no males, and only pregnant or lactating females, there is a chance that significant numbers of females could die, meaning fewer offspring, leading to a subsequent reduction in the population. While the latest study focused only on the yellow-footed antechinus, which has a relatively wide distribution across Australia, other species in the same genus (group of species) with smaller ranges may be even more severely affected by climate change, Andrew Baker from the Queensland University of Technology, Australia, who was not involved in the paper, told ABC. Scientists only know about a handful of species that display male semelparity. Most of these are invertebrates, or animals without a backbone, making Antechinus an unusual case. The Frontiers in Physiology paper is not the only recent piece of research to highlight the plight of animals in Australia under climate change. One study published in the journal Read more: Newsweek
The males often die from “excess copulation”, so clearly the females will suffer most from climate change. 99.9999999% of Species that have ever lived are extinct. Many or most due to change in climate in one form or another. Well the 'mating itself to death' is a poor start. Climate changes everyday ¯\\_(ツ)_/¯
Incredible pictures of king tides show the risks of climate change - Business InsiderPeople around the world are helping scientists in the fight against climate change by photographing this year's incredible, extreme high tides
These five cities—including New York and Miami—are vulnerable to rising seasRecent climate-change projections have put some new cities in the crosshairs The question is, “ Who is moving? “ The answer is, “ Nobody! “ According to Al Gore they should already under water ...🤣🤣
Jane Fonda Re-Wore A Dress From 6 Years Ago At The Oscars Because She Doesn't Believe In Buying Clothes AnymoreQueen of being arrested at climate change protests. This wouldn’t even be an article if the fashion and entertainment industry didn’t deem wearing an outfit more than once as a bad thing. Or maybe she doesn't give a shit and just wears whatever she wants. I like that headline better. Who cares about her dress, her plastic surgeon deserves an Academy award she looks fabulous.
Attention Attenborough (and Trump), Greta Thunberg gets a BBC seriesAnd in other climate-related news, Bill Gates is NOT buying $644 million hydrogen-fueled mega-yacht just yet. Thought she was already directing the bbc news?
A mystery radio signal from deep space appears to be following a 16-day cycleScientists say they have found the first fast radio burst that has a steady repeating cycle. 80 percent of what you hear about Aliens comes from Federal Agents trying to confuse you . Federal agents listen to human ghosts and human ghosts want to mislead you and turn you off Aliens !!!!! ET phone home..._ET phone home..._ET phone home..._ 👽✨🙊🐱
Vanessa Bryant says she's struggling to process Kobe and Gigi's deaths in heartbreaking Instagram postVanessa Bryant has been regularly posting touching tributes to her husband and daughter on Instagram. In her latest post, she shared that she is struggling to process the sudden loss of Kobe and Gianna. 'I can't process both at the same time.' 😭😭😭 I feel so bad for her I can’t imagine what she’s feeling right now 😞. Understandable