Many animal species have been shown to discriminate between individual humans in captive settings and may use a variety of cues to do so. Empirical evidence remains scarce for animals in the wild, however, particularly in aquatic contexts. For the first time, we investigated discrimination of individual humans by fish in the wild. We first trained two species of fish, saddled sea bream Oblada melanura and black sea bream Spondyliosoma cantharus, to follow a human diver to obtain a food reward. We then investigated whether they could discriminate between two human divers and follow the correct one in an operant-conditioning paradigm. We show that both species were able to quickly learn to discriminate between the two divers when they wore different diving gear. However, they showed no preference when both divers wore identical gear, suggesting that discrimination is based predominantly on visual cues from the dive gear. We discuss the implications of these results for ethical considerations and research practices.

News article: Experiments show wild fish can recognize individual divers

Between 3000 BCE and 1800 CE there were more than sixty ‘mega-empires’ that, at the peak, controlled an area of at least one million square kilometres. What were the forces that kept together such huge pre-industrial states? I propose a model for one route to mega-empire, motivated by imperial dynamics in eastern Asia, the world region with the highest concentration of mega-empires. This ‘mirror-empires’ model proposes that antagonistic interactions between nomadic pastoralists and settled agriculturalists result in an autocatalytic process, which pressures both nomadic and farming polities to scale up polity size, and thus military power. The model suggests that location near a steppe frontier should correlate with the frequency of imperiogenesis. A worldwide survey supports this prediction: over 90% of mega-empires arose within or next to the Old World’s arid belt, running from the Sahara desert to the Gobi desert. Specific case studies are also plausibly explained by this model. There are, however, other possible mechanisms for generating empires, of which a few are discussed at the end of the article.

No article to link, so let me explain:

Turchin, who studies history in a more data-science way, found that empires in the past 4000 years seem to pop up in pairs, likely as a result of the escalating arms race between agriculturalists and pastoralists. Pastoralists are used to mobility and trade (using animals for transport); agriculturalists use less land, but still have the tendency to expand for land and to secure trade routes. Obviously, expanding trade means more capital accumulation, and that applies to both. Pastoralists tend to rely on trade as they don't live off a "carnivore diet", but raise the "living stocks" as capital to grow wealth via trade.

The conflict is ancient and ongoing in many parts of the world, usually found as "farmer-herder conflict" in the literature.

Unrelated to the article, this is how I'm interpreting the ongoing war in Sudan, for example.

No news article for this, so I'll just mention some points:

• PROTEIN THO
• because of increases in GHGs, plants may grow more ("greening"), but the growth is rich in carbohydrates, leaving behind relatively a lot of other nutrients, especially Nitrogen based ones (amino acids)
• while ruminants can digest low-nutrient plant matter better than others, it doesn't make proteins appear out of nowhere. Large herbivores are already at the far end of "low nutrient use"
• this will lead to lower growth rates
• the low growth rates will mean huge losses for animal farmers, the rancher/herder types especially, the ones who rely on pastures and hay instead of concentrated feed
• they'll want to fertilize grasslands with nitrogen fertilizers (like planted grasslands... like lawns, which are perennial feed crops)
• they'll want to use more feed like soybeans

Summary

The horizontal transmission of cultural knowledge is a powerful mechanism of evolutionary change1. Across taxa, group-specific cultural traditions are expressed in diverse contexts, such as foraging, tool use, self-care and socialization2. These traditions arise when group members converge on specific behavioral phenotypes. When these behavioral phenotypes involve communicative signals, such as gestures, they are termed dialects3. However, gestural dialects are rare in non-humans3. Behavioral phenotypes and traditions can also be lost, a well-documented phenomenon in humans4, but rarely documented in non-human animals5. Here, we find that chimpanzee gestures produced in copulation solicitations show culturally established phenotypes and undergo cultural loss due to human-induced population decline.

Article about the study: Human influence has led to loss of dialects in chimpanzees, long-term study suggests

Warning: it has carnist bias recommending fish and one egg a day but points out the dangers of consuming animal products.

As plant-based diets gain traction, interest in their impacts on the gut microbiome is growing. However, little is known about diet-pattern-specific metagenomic profiles across populations. Here we considered 21,561 individuals spanning 5 independent, multinational, human cohorts to map how differences in diet pattern (omnivore, vegetarian and vegan) are reflected in gut microbiomes. Microbial profiles distinguished these common diet patterns well (mean AUC = 0.85). Red meat was a strong driver of omnivore microbiomes, with corresponding signature microbes (for example, Ruminococcus torques, Bilophila wadsworthia and Alistipes putredinis) negatively correlated with host cardiometabolic health. Conversely, vegan signature microbes were correlated with favourable cardiometabolic markers and were enriched in omnivores consuming more plant-based foods. Diet-specific gut microbes partially overlapped with food microbiomes, especially with dairy microbes, for example, Streptococcus thermophilus, and typical soil microbes in vegans. The signatures of common western diet patterns can support future nutritional interventions and epidemiology.

News version: Gut Microbiome Signatures of Different Diets Revealed - EMJ

To keep health as a unifying force, we must put resources into tackling health misinformation and disinformation - The Lancet

Health is political. This is what many practitioners of public and clinical health believe. Health and health policy are shaped by the political ideology of governments, whether that means more money to invest in health systems or less regulation on health-harming products. Health can also cut across political lines because health is a universally shared value. Everyone wants their loved ones to be healthy, so framing societal issues as health issues can draw people from across the political spectrum to advocate for change and policies. The health community has had successes using this strategy with, for example, the climate crisis and gun violence. Framing climate change in the context of its health implications has helped make it a more accessible and tangible topic to many people.1 Framing gun violence as a public health issue assisted in the topic becoming less politicised in some countries.2 But in recent years health has been the subject of unprecedented polarisation, begging the question: is health no longer a unifying force, but a dividing one?

Abstract

The terms ‘vegansexuality’ and ‘vegansexuals’ entered popular discourse following substantial media interest in a New Zealand-based academic study on ethical consumption that noted that some vegans engaged in sexual relationships and intimate partnerships only with other vegans. At this time it was suggested that a spectrum existed in relation to cruelty-free consumption and sexual relationships: at one end of this spectrum, a form of sexual preference influenced by veganism entailed an increased likelihood of sexual attraction towards those who shared similar beliefs regarding the exploitation of non-human animals; at the other end of the spectrum such a propensity might manifest as a strong sexual aversion to the bodies of those who consume meat and other animal products. The extensive media hype about (and public response to) vegansexuality was predominantly negative and derogatory towards ‘vegansexuals’ and vegans/vegetarians. A particular aggression was evident in online comments by those positioned as heterosexual meat-eating men. In this article we examine the hostile responses to vegansexuality and veganism posted by such men on internet news and journalism sites, personal blogs and chatrooms. We argue that the rhetoric associated with this backlash constructs vegansexuals — and vegans more generally — as (sexual) losers, cowards, deviants, failures and bigots. Furthermore, we suggest that the vigorous reactions of self-identified omnivorous men demonstrate how the notion of alternative sexual practices predicated on the refusal of meat culture radically challenges the powerful links between meat-eating, masculinity and virility in western societies.

An educational video about the methods in the papers we talk about, in context.

Some papers and books are linked in the YT description.

I don't like that "PlantChompers" switched to "Viva Longevity", but I appreciate these types of videos.

Isotopic evidence of high reliance on plant food among Later Stone Age hunter-gatherers at Taforalt, Morocco | Nature Ecology & Evolution

The transition from hunting-gathering to agriculture stands as one of the most important dietary revolutions in human history. Yet, due to a scarcity of well-preserved human remains from Pleistocene sites, little is known about the dietary practices of pre-agricultural human groups. Here we present the isotopic evidence of pronounced plant reliance among Late Stone Age hunter-gatherers from North Africa (15,000–13,000 cal BP), predating the advent of agriculture by several millennia. Employing a comprehensive multi-isotopic approach, we conducted zinc (δ66Zn) and strontium (87Sr/86Sr) analysis on dental enamel, bulk carbon (δ13C) and nitrogen (δ15N) and sulfur (δ34S) isotope analysis on dentin and bone collagen, and single amino acid analysis on human and faunal remains from Taforalt (Morocco). Our results unequivocally demonstrate a substantial plant-based component in the diets of these hunter-gatherers. This distinct dietary pattern challenges the prevailing notion of high reliance on animal proteins among pre-agricultural human groups. It also raises intriguing questions surrounding the absence of agricultural development in North Africa during the early Holocene. This study underscores the importance of investigating dietary practices during the transition to agriculture and provides insights into the complexities of human subsistence strategies across different regions.

Paper links in article.

The entire lifecycle of raising animals for beef production — from planting and harvesting feed crops to transportation, processing, and refrigeration — consumes a very substantial amount of energy, mostly coming from fossil fuels.

Paper:

Energy input and food output: The energy imbalance across regional agrifood systems | PNAS Nexus | Oxford Academic

Biomass was the principal energy source in preindustrial societies; their agriculture provided more energy than it required. Thus, the energy return on energy investment (EROEI) needed to be >1. Recent studies have indicated that this may not be the case for modern industrialized agrifood systems (AFSs). Although the green revolution radically improved agricultural yields, it came at the expense of increased energy inputs, mainly in the form of fossil fuels. AFSs relying on external energy pose a food security risk, an economic issue for agricultural producers, and an environmental issue for all. Previous EROEI studies investigated mainly certain groups of commodities, typically at the local or national level. Here, a comprehensive global analysis shows that current AFSs have a lower EROEI than previously estimated. Globally, EROEI has increased from 0.68 in 1995 to 0.91 in 2019. In low-income regions, AFSs are still energy sources, but their EROEI has declined with increasing wealth, reflecting the growing utilization of fossil fuels. AFSs of high-income regions are energy sinks, although their EROEI has improved. Food processing is responsible for 40% of the total energy use in the global AFS, notably larger than fertilizer, which accounts for 17%. More than half of the energy use in food processing is for livestock products that also require disproportionate energy input through their inefficient conversion of (human-edible) feed. Livestock products use 60% of energy inputs while delivering <20% of food calories.

The paper itself:

Integration of lipidomics with targeted, single cell, and spatial transcriptomics defines an unresolved pro-inflammatory state in colon cancer

Abstract

Background Over a century ago, Virchow proposed that cancer represents a chronically inflamed, poorly healing wound. Normal wound healing is represented by a transitory phase of inflammation, followed by a pro-resolution phase, with prostaglandin (PGE2/PGD2)-induced ‘lipid class switching’ producing inflammation-quenching lipoxins (LXA4, LXB4).

Objective We explored if lipid dysregulation in colorectal cancers (CRCs) is driven by a failure to resolve inflammation.

Design We performed liquid chromatography and tandem mass spectrometry (LC–MS/MS) untargeted analysis of 40 human CRC and normal paired samples and targeted, quantitative analysis of 81 human CRC and normal paired samples. We integrated analysis of lipidomics, quantitative reverse transcription-PCR, large scale gene expression, and spatial transcriptomics with public scRNASEQ data to characterize pattern, expression and cellular localisation of genes that produce and modify lipid mediators.

Results Targeted, quantitative LC–MS/MS demonstrated a marked imbalance of pro-inflammatory mediators, with a dearth of resolving lipid mediators. In tumours, we observed prominent over-expression of arachidonic acid derivatives, the genes encoding their synthetic enzymes and receptors, but poor expression of genes producing pro-resolving synthetic enzymes and resultant lipoxins (LXA4, LXB4) and associated receptors. These results indicate that CRC is the product of defective lipid class switching likely related to inadequate or ineffective levels of PGE2/PGD2.

Conclusion We show that the lipidomic profile of CRC tumours exhibits a distinct pro-inflammatory bias with a deficiency of endogenous resolving mediators secondary to defective lipid class switching. These observations pave the way for ‘resolution medicine’, a novel therapeutic approach for inducing or providing resolvins to mitigate the chronic inflammation driving cancer growth and progression.

The result has been not adaptation, but an exodus. Most pastoralists Rabari knows, particularly younger generations, are leaving the trade, seeking employment instead as drivers or cleaners in Ahmedabad. Rabari, who organizes for women pastoralists through the Maldhari Mahila Sangathan, or the Pastoral Women Alliance, says women are most often the ones left behind to tend to the herds.

They “have to take care of their children, they have to take care of the food, and they have to take care of the water,” she said. “They face the heat, they face the floods, or the excess rain.”

[...]

“Warming past 2 degrees C, which we will experience over the next 30 years, would mean that even overnight shifts wouldn’t recover productivity,” said Zobel.

Paper:

No Reprieve: Extreme Heat at Night Contributes to Heat Wave Mortality

https://ehp.niehs.nih.gov/doi/full/10.1289/EHP13206

Dietary plant-to-animal protein ratio and risk of cardiovascular disease in 3 prospective cohorts - ScienceDirect

Abstract

Background

Dietary guidelines recommend substituting animal protein with plant protein, however, the ideal ratio of plant-to-animal protein (P:A) remains unknown.

Objectives

We aimed to evaluate associations between the P:A ratio and incident cardiovascular disease (CVD), coronary artery disease (CAD), and stroke in 3 cohorts.

Methods

Multivariable-adjusted Cox proportional hazard models were used to estimate hazard ratios (HRs) for CVD outcomes among 70,918 females in the Nurses’ Health Study (NHS) (1984–2016), 89,205 females in the NHSII (1991–2017) and 42,740 males from the Health Professionals Follow-up Study (1986–2016). The P:A ratio was based on percent energy from plant and animal protein and assessed using food frequency questionnaires every 4 y.

Results

During 30 y of follow-up, 16,118 incident CVD cases occurred. In the pooled multivariable-adjusted models, participants had a lower risk of total CVD [HR: 0.81; 95% confidence interval (CI): 0.76, 0.87; P trend < 0.001], CAD (HR: 0.73; 95% CI: 0.67, 0.79; P trend < 0.001), but not stroke (HR: 0.98; 95% CI: 0.88, 1.09; P trend = 0.71), when comparing highest to lowest deciles of the P:A ratio (ratio: ∼0.76 compared with ∼0.24). Dose–response analyses showed evidence of linear and nonlinear relationships for CVD and CAD, with more marked risk reductions early in the dose-response curve. Lower risk of CVD (HR: 0.72; 95% CI: 0.64, 0.82) and CAD (HR: 0.64; 95% CI: 0.55, 0.75) were also observed with higher ratios and protein density (20.8% energy) combined. Substitution analyses indicated that replacing red and processed meat with several plant protein sources showed the greatest cardiovascular benefit.

Conclusions

In cohort studies of United States adults, a higher plant-to-animal protein ratio is associated with lower risks of CVD and CAD, but not stroke. Furthermore, a higher ratio combined with higher protein density showed the most cardiovascular benefit.

Report: https://www.efsa.europa.eu/en/efsajournal/pub/9106

Significance

Many meat and milk alternatives have been assessed from nutritional, environmental, and cost perspectives, but the analyses are rarely consistently combined, which limits the ability to identify cobenefits and trade-offs across domains. Our study advances each analysis and provides a comprehensive multicriteria assessment of meat and milk alternatives from nutritional, health, environmental, and cost perspectives. For a full contextualization, we compared the meat and milk alternatives to the animal products they intend to replace as well as to the unprocessed plant-based foods they are made from; we considered comparisons along multiple and complementary units of measurement, including per serving and per calorie; and we included comparisons per product as well as per overall diets in dedicated replacement analyses.

Abstract

Reducing meat and dairy intake has been identified as a necessary strategy for mitigating the high environmental impacts food systems are currently having on climate change, biodiversity loss associated with land-use changes, and freshwater use. Having a choice of dedicated meat and milk replacements available to consumers can help in the transition toward more plant-based diets, but concerns about nutritional and health impacts and high costs can impede uptake. Here, we conduct a multicriteria assessment of 24 meat and milk alternatives that integrates nutritional, health, environmental, and cost analyses with a focus on high-income countries. Unprocessed plant-based foods such as peas, soybeans, and beans performed best in our assessment across all domains. In comparison, processed plant-based products such as veggie burgers, traditional meat replacements such as tempeh, and plant milks were associated with less climate benefits and greater costs than unprocessed foods but still offered substantial environmental, health, and nutritional benefits compared to animal products. Our findings suggest that a range of food products exist that when replacing meat and dairy in current diets would have multiple benefits, including reductions in nutritional imbalances, dietary risks and mortality, environmental resource use and pollution, and when choosing unprocessed foods over processed ones also diet costs. The findings provide support for public policies and business initiatives aimed at increasing their uptake.

https://www.ucl.ac.uk/news/2024/dec/beans-and-peas-are-best-meat-alternative

The production and consumption of food is one of the main drivers of environmental change globally. Meanwhile, many populations remain malnourished due to insufficient or unhealthy diets. Increasingly, dietary shifts are proposed as a means to address both environmental and health concerns. We have a limited understanding of how dietary shifts could alter where food is produced and consumed and how these changes would affect the distribution of environmental pressures both globally and across different groups of people. Here we combine new food flow data linking producing to consuming country with environmental pressures to estimate how a global shift to each of four diets (Indian, EAT-Lancet, Mediterranean, and mean Food Based Dietary Guidelines (FBDGs)) could affect environmental pressures at the global, country income group, and country level. Globally, cumulative pressures decrease under the Indian, EAT-Lancet, and Mediterranean scenarios and increase under FBDGs. On average, low income countries increase their cumulative consumption and production pressures while high income countries decrease their consumption pressures, and typically decrease their production pressures. Increases in low income countries are likely due to the nutritional inadequacy of current diets and the corresponding increases in consumption quantities with a shift to our diet scenarios. Despite these increases, we believe that three out four of our simulated dietary shifts can be seen as a net benefit by decreasing global pressures while low income countries increase pressures to adequately feed their populations. Additionally, considering principles of fairness applied, some nations are more responsible for causing historical environmental pressures and should shoulder more of the change. To facilitate more equitable shifts in global diets, resources, capacity, and knowledge sharing of sustainable agricultural practices are critical to minimize the increases in pressures that low income countries would incur to adequately feed their populations.

cross-posted from: https://lemmy.vg/post/984284

Yet it's politically difficult to reverse practices that have been in place for many decades. Much of that drained peatland is now owned by farmers who are using it as pasture or hay fields. Most of them want to keep that land dry.

CW: images from fur farms

Put simply, if SARS-CoV-2 came about by frequent recombination through contact with common virus-carrying animals in the wild, we would expect it to display a mix of genome segments shared between it and several of their close cousins. However, if SARS-CoV-2 came about through manipulation in a lab, such as through gain-of-function research, we would expect a close match to one and only one “initial” strain, with the remainder of the genome failing to match any other wild strains. The discovery that SARS-CoV-2 does indeed have what biologists call a mosaic genome makes it abundantly clear that it could not have arisen through laboratory manipulation of an initial, single strain, through gain-of-function research or otherwise.

Iron-(Fe3+)-Dependent Reactivation of Telomerase Drives Colorectal Cancers | Cancer Discovery | American Association for Cancer Research

Over-consumption of iron-rich red meat and hereditary or genetic iron overload are associated with an increased risk of colorectal carcinogenesis, yet the mechanistic basis of how metal-mediated signaling leads to oncogenesis remains enigmatic. Using fresh colorectal cancer samples we identify Pirin, an iron sensor, that overcomes a rate-limiting step in oncogenesis, by reactivating the dormant human telomerase reverse transcriptase (hTERT) subunit of the telomerase holoenzyme in an iron-(Fe3+)-dependent manner and thereby drives colorectal cancers. Chemical genetic screens combined with isothermal dose-response fingerprinting and mass spectrometry identified a small molecule SP2509 that specifically inhibits Pirin-mediated hTERT reactivation in colorectal cancers by competing with iron-(Fe3+) binding. Our findings, first to document how metal ions reactivate telomerase, provide a molecular mechanism for the well-known association between red meat and increased incidence of colorectal cancers. Small molecules like SP2509 represent a novel modality to target telomerase that acts as a driver of 90% of human cancers and is yet to be targeted in clinic.

Significance: We show how iron-(Fe3+) in collusion with genetic factors reactivates telomerase, providing a molecular mechanism for the association between iron overload and increased incidence of colorectal cancers. Although no enzymatic inhibitors of telomerase have entered the clinic, we identify SP2509, a small molecule that targets telomerase reactivation and function in colorectal cancers.

People who are prejudiced against one social group also tend to be prejudiced against other social groups, that is, they show generalized prejudice. Many scholars have noted parallels between the devaluation and exploitation of certain human groups (e.g., racism, sexism, and other forms of prejudice) and the treatment of non-human animals (often referred to as speciesism), suggesting that generalized prejudice may even extend across species lines. I tested this hypothesis using panel data with large and demographically diverse participant samples and different operationalizations of the devaluation of humans and animals. Study 1 (56,759 participants from 46 European countries) revealed a positive association between human-directed prejudice and human supremacy beliefs and this association was still observed when controlling for various socio-demographic factors (e.g., gender, educational attainment, religiosity, political orientation). Study 2 (1,566 Dutch participants) revealed positive associations between human-directed prejudice and a host of attitudes, beliefs, emotional responses, and behaviors related to meat consumption. For the majority of tests, this positive association was still observed when controlling for socio-demographic factors. Thus, both studies suggest that people who devalue human groups also tend to devalue the welfare and interests of animals. The current findings support recent theorizing on the common psychological roots of human-directed and animal-directed prejudice and attest to the generality of generalized prejudice.

Article about this paper: https://faunalytics.org/devaluation-of-animals-is-linked-to-devaluation-of-humans/

Seed oils like canola give you "Oil Brain" and we would be dumb without fish according to What I've Learned. Let's see if the claims add up.

The "how I failed to learn" YouTube channel is at it again.

Most monitoring programs next to large per- and polyfluoroalkyl substances (PFAS) sources focus on drinking water contamination near source zones. However, less is understood about how these sources affect downgradient hydrological systems and food webs. Here, we report paired PFAS measurements in water, sediment, and aquatic biota along a hydrological gradient away from source zones contaminated by the use of legacy aqueous film-forming foam (AFFF) manufactured using electrochemical fluorination. Clustering analysis indicates that the PFAS composition characteristic of AFFF is detectable in water and fishes >8 km from the source. Concentrations of 38 targeted PFAS and extractable organofluorine (EOF) decreased in fishes downgradient of the AFFF-contaminated source zones. However, PFAS concentrations remained above consumption limits at all locations within the affected watershed. Perfluoroalkyl sulfonamide precursors accounted for approximately half of targeted PFAS in fish tissues, which explain >90% of EOF across all sampling locations. Suspect screening analyses revealed the presence of a polyfluoroketone pharmaceutical in fish species, and a fluorinated agrochemical in water that likely does not accumulate in biological tissues, suggesting the presence of diffuse sources such as septic system and agrochemical inputs throughout the watershed in addition to AFFF contamination. Based on these results, monitoring programs that consider all hydrologically connected regions within watersheds affected by large PFAS sources would help ensure public health protection.