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Data analysis navigates lookalikes to try to pin down the true number of mouse lemur species

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Data analysis navigates lookalikes to try to pin down the true number of mouse lemur species


Can you spot the species in these lemur lookalikes?
Various species of mouse lemurs found in Madagascar. Credit: Sam Hyde Roberts

In some parts of the world, animals are going extinct before scientists can even name them. Such may be the case for mouse lemurs, the saucer-eyed, teacup-sized primates native to the African island of Madagascar. There, deforestation has prompted the International Union for the Conservation of Nature (IUCN) to classify some of these tree-dwelling cousins as “endangered” even before they are formally described.

Duke professor Anne Yoder has been trying to take stock of how many mouse lemur species are alive today before they blink out of existence. The findings are published in the journal Nature Ecology & Evolution.

It’s not an easy task. Mouse lemurs are shy, they only come out at night, and they live in hard-to-reach places in remote forests. To add to the difficulty, many species of mouse lemurs are essentially lookalikes. It’s impossible to tell them apart just by peering at them through binoculars.

When Yoder first started studying mouse lemurs some 25 years ago, there were only three distinct species recognized by scientists. Over time and with advances in DNA sequencing, researchers began to wonder if what looked like three species might actually be upwards of two dozen.

In a new study, Yoder and dozens of colleagues from Europe, Madagascar and North America compiled and analyzed 50 years of hard-won data on the physical, behavioral and genetic differences among mouse lemurs to try to pin down the true number.

A framework for clarifying cryptic diversification processes applied to mouse lemurs
Island-wide taxogenomics of the cryptic Microcebus radiation. Credit: Nature Ecology & Evolution (2024). DOI: 10.1038/s41559-024-02547-w

While many mouse lemur species look alike, they have different diets, and males use different calls to find and woo their mates, the researchers explain. By pinning down their number and location, researchers hope to make more informed decisions about how best to help keep these species from the brink.

More information:
Tobias van Elst et al, Integrative taxonomy clarifies the evolution of a cryptic primate clade, Nature Ecology & Evolution (2024). DOI: 10.1038/s41559-024-02547-w

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Duke Research Blog

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Data analysis navigates lookalikes to try to pin down the true number of mouse lemur species (2024, October 7)
retrieved 7 October 2024
from https://phys.org/news/2024-10-analysis-lookalikes-pin-true-mouse.html

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Study shows how international student mobility can reduce poverty in low and middle-income countries

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Study shows how international student mobility can reduce poverty in low and middle-income countries


Study shows how international student mobility can reduce poverty in low and middle-income countries
Outbound Student Mobility and Poverty (N = 43 Countries). Credit: International Journal of Educational Research (2024). DOI: 10.1016/j.ijer.2024.102458

A new study exploring the effects of international student mobility has found that foreign-educated graduates reduce extreme poverty in low and middle-income countries. The paper, published in the International Journal of Educational Research, uses data spanning two decades.

Associate Professor of Comparative and International Education, Maia Chankseliani, and Postdoctoral Researcher, Joonghyun Kwak, of Oxford’s Department of Education conducted the research which shows a notable poverty alleviation in low- and middle-income countries thanks to international student mobility.

Professor Chankseliani said, “Our research shows that while the short-term effects of international student mobility on poverty reduction are not significant, its long-term impact—over a 15-year period—has a notable positive association with poverty alleviation in low- and middle-income countries. Returnees use the skills and knowledge they gain abroad to drive local innovations and contribute to societal changes, which can lead to systemic poverty reduction over time.

“International student mobility has tripled from two million students in 1997 to over six million by 2021. This surge reflects the growing recognition of the value of studying abroad for both individual advancement and societal development, with governments, universities, charities, and private firms offering scholarships for international study.

“However, in recent years, rising insularity and nationalist sentiments in some countries have posed challenges to mobility, with increasing barriers to cross-border education and collaboration. This makes studies like ours more critical than ever, as they demonstrate the long-term benefits of international education, not just for individuals, but for global development. Understanding these impacts can help inform policies that keep educational exchanges open and accessible, even in an increasingly inward-looking world.”

The research looks at how skills, knowledge, and connections gained abroad often lead to change after returnees have had time to apply them in their own contexts. They can introduce new practices and innovations in areas like governance, education, and economic development.

Maia continued, “Our findings underscore the crucial role international student mobility plays in long-term poverty reduction. We hope this paper will encourage policymakers to recognize the important role international education plays in development. This could lead to greater support for scholarships and initiatives that allow students from low- and middle-income countries to study abroad.”

Joonghyun said, “In low- and middle-income countries, domestic education systems may not always match the quality found in higher-income nations, particularly in producing and spreading knowledge and skills. In this context, those who study abroad bring back new knowledge, skills, and international connections, helping to fill crucial gaps and drive efforts to reduce poverty in their home countries.

“To broaden access for people in low- and middle-income countries, expanding scholarship opportunities is essential. Since self-funded study abroad is largely restricted to students from affluent backgrounds, increasing targeted scholarships can help provide more opportunities for those from low-income countries.”

The research, which has been taking place for the last 18 months, looked to identify trends in the relationship between outbound student mobility and poverty reduction through a cross-national analysis. To achieve this, it included all low- and middle-income countries with available data.

Joonghyun concluded, “I hope the findings of this study provide valuable policy insights for international higher education and sustainable development in low- and middle-income countries. Expanding study abroad opportunities is vital not only for individual success but also for tackling broader societal challenges like poverty. By increasing access to international education and enhancing local educational systems, we can make a significant contribution to the sustainable development of these countries.”

More information:
Joonghyun Kwak et al, International student mobility and poverty reduction: A cross-national analysis of low- and middle-income countries, International Journal of Educational Research (2024). DOI: 10.1016/j.ijer.2024.102458

Citation:
Study shows how international student mobility can reduce poverty in low and middle-income countries (2024, October 7)
retrieved 7 October 2024
from https://phys.org/news/2024-10-international-student-mobility-poverty-middle.html

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part may be reproduced without the written permission. The content is provided for information purposes only.





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Study finds gender influences fairness attitudes in children

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Study finds gender influences fairness attitudes in children


Fairness attitudes in children
Experimental arrangement of the inequity aversion choice task. Credit: Communications Psychology (2024). DOI: 10.1038/s44271-024-00139-9

How do young children perceive what is fair and what is unfair, and how do they behave as a result? Three psychologists from Heinrich Heine University Düsseldorf (HHU), Tilburg University in the Netherlands and the University of Veterinary Medicine, Vienna, show in the journal Communications Psychology that stereotypical gender differences do exist, but that the story is in fact more complicated than that.

The scenario is familiar: Seven-year-old Lukas complains loudly when his friend Henry is allowed one more scoop of ice cream than him. Although—or even because (?)—he feels unfairly treated, he refuses to share his ice cream with his friend Leo, who has none at all. By contrast, Lisa shares her ice cream with Leo. The next day, however, Lukas has chocolate with him, which he happily shares with Lisa.

The first example seems to fit the stereotype: Boys recognize exactly when they are being disadvantaged, yet at the same time they treat other children just as unfairly. Conversely, girls are more willing to share. But this stereotype does not apply in the case of the chocolate.

Three researchers, who originally all worked at HHU, have examined in more detail how this sense of fairness and unfairness develops in children: Professor Dr. Tobias Kalenscher, Principal Investigator of the Comparative Psychology research team in Düsseldorf, Dr. Lina Oberließen, now at the Wolf Science Center of the University of Veterinary Medicine, Vienna, and Professor Dr. Marijn van Wingerden from the Department of Cognitive Science and Artificial Intelligence at Tilburg University. They describe behavioral experiments they have conducted with 332 children aged between three and eight.

Professor van Wingerden says, “We did not have ice cream or chocolate though. Instead, the children were paired up and had to award each other smiley stickers. In some cases, we also added additional costs for the allocating child when they e.g. distributed the stickers equally. And then we observed how the children behaved in various gender constellations.”

Dr. Oberließen comments on the results, saying, “We indeed found gender-related effects. Girls showed more compassion than boys. Interestingly however, both genders displayed the same envy when a boy received a larger portion. This suggests that boys in general were treated with higher envy.”

Boys also tend to be more spiteful to other boys: They always selected the maximum possible number of stickers for themselves, even if it meant that their partner was left empty-handed.

So, the fairness attitudes of children are in fact dependent on gender—however, not only on their own gender, but also on the gender of the children they are interacting with.

Van Wingerden says, “We identified typical gender stereotypes—girls are more compassionate, while boys are more competitive.”

Oberließen adds, “The story is however more complicated than that. Both genders tend to treat boys with more envy than girls. And boys are significantly more compassionate when it comes to sharing resources with girls than with other boys.”

From the results, Professor Kalenscher concludes, “Gender stereotypes permeate today’s society. Our study underlines that gendered differences in social behavior can in fact be observed empirically, even in young children, possibly contributing to cultural gender typecasts in adult life.

“However, we can also see that, at least in the field of fairness preferences, gendered differences solidify over an extended period. This observation leaves room for promoting non-gender-stereotyped fairness attitudes during this critical period of childhood.”

More information:
Marijn van Wingerden et al, Egalitarian preferences in young children depend on the genders of the interacting partners, Communications Psychology (2024). DOI: 10.1038/s44271-024-00139-9

Provided by
Heinrich Heine University Düsseldorf

Citation:
Study finds gender influences fairness attitudes in children (2024, October 7)
retrieved 7 October 2024
from https://phys.org/news/2024-10-gender-fairness-attitudes-children.html

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People don’t like a ‘white savior,’ but does it affect how they donate to charity?

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People don’t like a ‘white savior,’ but does it affect how they donate to charity?


by Robert Hoffmann, Ananta Neelim, Simon Feeny and Swee-Hoon Chuah,

aid worker
Credit: RDNE Stock project from Pexels

Efforts to redress global inequality are facing an unexpected adversary: the white savior. It’s the idea that people of color, whether in the Global South or North, need “saving” by a white Western person or aid worker.

An eclectic mix of white activists have been publicly accused of being white saviors for trying to help different causes in the Global South. They include celebrities who adopted orphaned children, organized benefit concerts such as Live Aid, or called out rights abuses.

Others include professional and volunteer charity workers and journalists reporting on poverty in Africa. Even activism at home can earn the white savior label, like efforts to refine the proposal for the Indigenous Voice to Parliament in Australia.

We conducted a series of studies with 1,991 representative Australians to find out what people thought made a white savior, how charity appeal photographs create this impression, and how it affected donations.

White saviorism and charities

The concern is that white people’s overseas charity, even when well-meaning, can inadvertently hurt rather than help the cause. It could perpetuate harmful stereotypes of white superiority, disempower local people, or misdirect resources to make helpers feel good rather than alleviating genuine need.

The fear of being labeled a white savior could make people think twice about giving time or money to worthy causes. It might stop aid organizations using proven appeals to raise donations they need.

Médecins Sans Frontières (MSF), for instance, released a video apologizing for using photos depicting white people in aid settings and which aren’t representative of the majority local staff they employ.

Therein lies the dilemma: white donors can relate to photos of white helpers, but this is easily interpreted as white savourism.

What makes someone a white savior?

Very little research exists into exactly what white saviourism means. Broadly, it seems to describe people in the Global North who support international causes for selfish reasons, to satisfy their own sentimentality and need for a positive image. We wanted to go deeper.

In the first of our studies, we showed our participants 26 photographs depicting different Global South aid settings with a white helper.

The helpers that participants thought of as highly “white savior” typically had these characteristics:

  • they appeared to be privileged and superior
  • they gave help sentimentally and tokenistically
  • they conformed to the colonial stereotype of the helpless local and powerful foreigner.

Further analysis showed these characteristics boil down to two essential features: ineffectiveness of the help and entitlement of the helpers.

These two perceptions of the white savior explain the problem for charity. Behavioral economics research has identified two main reasons for donating, and these perceptions undermine both.

Why do people donate at all?

So to see how much white saviourism affects charities, we need to know why people donate in the first place.

One reason for giving is pure altruism, the desire to help others with no direct benefit to oneself. The effective altruism movement encourages people to make every donated dollar count—getting the maximum bang for the buck in terms of measurable outcomes for those in need.

The difficulty for effective altruists is in assessing the impact of different charities vying for their donations. There are now websites that list charities by lives saved per dollar donated.

Alternatively, donors might look at a charity’s appeal images for clues of how effectively it will use their dollars.

Depicting white people as saviors can create the impression of tokenistic aid that only serves the helper’s sentimental needs. Evidence shows people resent impure motives in others (including organizations) and might try to penalize them.

Behavioral economics research also shows, as you might expect, that some people are more concerned about themselves than others when giving. This is known as “warm glow” giving.

Warm glow givers have several self-serving motivations. They include giving to gain self-respect or social status.

People also have a desire to meet their social obligations. For richer folks, this could include charitable giving. And giving can reduce guilt they might feel about their privilege.

Just like the effective altruist, the warm glow giver could be put off by any sign of white saviourism. They don’t want to be seen to be endorsing it.

Do people still donate?

All this suggests that seeing a white savior depiction in a charitable appeal will make people donate less.

We examined this in another study, in which participants were shown each of the previous photos. This time they were asked, for every photo, if they were willing to donate to a charity that uses it.

And as we thought, the photos previously rated as high in white saviourism had low intentions to donate.

But intentions do not always equal actions, as psychologists have demonstrated for many years.

To overcome this, we measured real donations in another study. Again participants saw the same photos, but this time they had the chance to donate part of their participation fee to a real charity when seeing them.

What we found surprised us: the white savior effect disappeared. How high a photo was on the white savior scale had no impact on how much participants donated when seeing it.

Does the end justify the motivation?

Our results summarize the dilemma. Donors might object to white saviorism by charities, but in the end feel that it’s the help that counts, not the motivation behind it.

We found some evidence for this when we asked participants about their general views of white saviorism.

Almost 70% agreed that white savior motives are common in Western help and that this was problematic for recipients. But interestingly, only 42% thought helpers with these motives deserved criticism.

Together, this might suggest that people feel white savior help is better than no help. There are voices in the charity community who echo this sentiment: imposing conditions on charitable giving will serve to reduce it.

In an interview with the Wall Street Journal, Elise Westhoff, president of the Philanthropy Roundtable in the United States, said “by imposing those ‘musts’ and ‘shoulds,’ you really limit human generosity.”

But this doesn’t mean there are no legitimate concerns. There are, but it’s not hard for charities to address them.

Our results show that white savior perceptions do not affect actual donations, so read another way, suggests charities can safely replace highly white savior images without losing donations for their causes.

Provided by
The Conversation


This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
People don’t like a ‘white savior,’ but does it affect how they donate to charity? (2024, October 7)
retrieved 7 October 2024
from https://phys.org/news/2024-10-people-dont-white-savior-affect.html

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part may be reproduced without the written permission. The content is provided for information purposes only.





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Whale shark shipping collisions may increase as oceans warm, predict researchers

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Whale shark shipping collisions may increase as oceans warm, predict researchers


Whale shark shipping collisions may increase as oceans warm
Whale shark with injury to the dorsal fin, likely to be caused by collision with a vessel. Credit: Gonzalo Araujo.

Global warming could increase the threat posed to whale sharks from large ships, according to a study published in Nature Climate Change, titled “Climate-driven global redistribution of an ocean giant predicts increased threat from shipping.”

Researchers from the University of Southampton and Marine Biological Association (MBA) predict that increased ocean temperatures will see this already endangered species driven into new habitats crossed by busy shipping lanes.

The study predicts that the co-occurrence of whale sharks and large ships could be 15,000 times higher by the end of the century compared to the present day.

Lead author Dr. Freya Womersley, University of Southampton and MBA Postdoctoral Research Scientist said, “These shifts in the whale sharks’ habitat were most extreme under high emission scenarios. A global reshuffling could lead to core habitat losses in some areas as well as increased co-occurrence with shipping traffic as oceans warm and other variables change.”

Whale sharks, the world’s largest fish, are highly mobile and responsive to changes in temperature. Recent evidence suggests they are also particularly vulnerable to ship strikes—where large marine animals are struck and injured, often fatally, by large vessels in the global fleet.

Researchers used whale shark satellite-tracking data coupled with global climate models to project the distribution of whale sharks under three different future climate scenarios.

The models project core habitat losses of over 50% in some national waters by 2100 under high emissions (where we continue to rely heavily on fossil fuels), with the greatest potential losses in Asia. Under a sustainable development scenario (in line with the target of no more than 2°C of global warming), some areas showed a gain in core habitat, notably in Europe.

Whale shark shipping collisions may increase as oceans warm
A whale shark swimming. Credit: Gonzalo Araujo

“The shifts we predict are likely to be less extreme if we are able to slow warming and mitigate climate change, suggesting that even complex, multi-factor impacts of climate change can be somewhat alleviated by our actions,” says Professor David Sims, co-author and Senior Research Fellow at the University of Southampton and MBA.

The team paired the distribution maps with information on shipping traffic density to determine if these habitat shifts would see whale sharks move into more heavily trafficked areas in future, potentially increasing the likelihood of ship strikes.

They found that some newly suitable habitats overlapped with busy shipping routes. This was the case in the US part of the North Pacific Ocean, the Japanese part of the Eastern China Seas, and the Sierra Leonian part of the North Atlantic Ocean, among many other sites globally.

Some areas, such as the Mexican part of the Gulf of Mexico, saw reductions in co-occurrence, where core habitats shifted into more coastal waters, away from the busy shipping routes in the center of the Gulf.

Professor Sims says, “Overall ship co-occurrence increased under all future climate scenarios, even if shipping remained at current levels, rather than its anticipated expansion of up to 1,200% by 2050.”

Womersley added, “We show that climate change has the potential to indirectly impact highly mobile marine species through interacting pressures of humans and the environment. This highlights the importance of factoring climate change into discussions around endangered species management.”

More information:
Freya Womersley et al, Climate-driven global redistribution of an ocean giant predicts increased threat from shipping, Nature Climate Change (2024). DOI: 10.1038/s41558-024-02129-5. www.nature.com/articles/s41558-024-02129-5

Citation:
Whale shark shipping collisions may increase as oceans warm, predict researchers (2024, October 7)
retrieved 7 October 2024
from https://phys.org/news/2024-10-whale-shark-shipping-collisions-oceans.html

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