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2023

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Weston C. McCool and more · 21 December 2023

Homicide rates in the United States increase when resources are scarce and unequally distributed

Identifying the factors that drive homicide rates is not only of paramount interest to scholars across the social and behavioral sciences but is necessary to inform policy decisions aimed at reducing lethal aggression. Studies nominate diverse causes of homicide, including ambient temperature, city greenness, firearm ownership, firearm laws, structural racism, income inequality, poverty, and more. However, without general theory scholars struggle to disentangle causal factors from correlated effects. This distinction is vitally important for designing interventions that target underlying causes rather than spurious correlations.

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Lindell Bromham and more · 18 October 2023

Cross-cultural correlations must be interpreted with caution

Is human cultural diversity partly shaped by the diversity of environments in which human societies live? Finding that a particular cultural feature is significantly associated with specific environmental variables adds weight to an argument that human diversity is shaped by environment. For example, many aspects of human cultural diversity have been found to correlate with parasite load, and these correlations have been interpreted as support for the hypothesis that cultures with high pathogen load develop features that limit the chance of infection, such as ritualized behaviours, xenophobia, belief in supernatural agents, and inclusion of antimicrobial ingredients in food.

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Daniel Major-Smith · 25 July 2023

Being Less Casual About Causality in the Evolutionary Human Sciences

As evolutionary human scientists, we care about causality. We usually want to know whether something causes something else, rather than whether things are just correlated. We want to know whether aspects of our culture, social structure or ecology cause a given behaviour, as opposed to being merely associated with it, for instance. Experiments are the gold standard for assessing causality, but for obvious reasons cannot answer everything, especially many of the evolutionary questions we’re interested in – Randomising infants to be raised as religious or not, for instance, would be both impossible and ethically questionable (to put it mildly!).

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Andrea Langeland and more · 16 June 2023

Comparative transcriptomics from intestinal cells of permissive and non-permissive hosts during Ancylostoma ceylanicum infection reveals unique signatures of protection and host specificity

The latest Paper of the Month for Parasitology is Comparative transcriptomics from intestinal cells of permissive and non-permissive hosts during Ancylostoma ceylanicum infection reveals unique signatures of protection and host specificity and is freely available. …

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Tim Gillett · 31 May 2023

Building a new frontier

Martyn Dade-Robertson, Editor-in-Chief of Research Directions: Biotechnology Design, explains more about this emerging branch of science Can we grow a building?…

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Seth Munson · 29 May 2023

What a decade of experience tells us about buffelgrass control

Buffelgrass is a highly invasive perennial that reduces the biodiversity of native ecosystems and provides ready fuel for wildfires in the arid regions where it thrives. After examining a decade of data from Arizona’s Saguaro National Park, researchers writing in the journal Invasive Plant Science and Management describe best practices for buffelgrass control.

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Sebastian L. Rock · 21 March 2023

Comments on Parasitology paper – Effects of parasitic freshwater mussels on their host fishes: a review

Starting my PhD in 2020 on the conservation of Swedish parasitic freshwater mussels (Order: Unionida), I initially noted a lack of effort put into the study of what these mussels actually do to their hosts. If our goal is to increase the number of these mussels in our lakes and rivers, this will inevitably have some downstream impact on their host fishes.

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Joel Leonard Nicholas Barratt · 14 March 2023

Cyclospora cayetanensis comprises at least 3 species that cause human cyclosporiasis

Despite its impact on United States (US) food safety since the 1990’s, efforts to understand Cyclospora cayetanensis genetics only really began within the last 7 years. However, we have learned a great deal over that time; genotyping technologies now exist for Cyclospora, and these are being used routinely to complement cyclosporiasis outbreak investigations performed by US public health agencies

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Ben J. Mans · 27 February 2023

Hard Ticks from Down Under in Burmese Amber

Amber is a rich source of invertebrate fossils that constantly turn up new families, genera, and species. To become an amber fossil, an organism needs to be trapped in tree resin oozing from injured trees, which hardens and gets buried beneath sediment before fossilization at high pressure and temperature.

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Animal Welfare · 9 February 2023

Playtime is purr-fect for your cat’s welfare

Play is often considered an indicator and promotor of animal welfare. Playing with your cat may also nurture closer cat-human bonds. In a new study, scientists have investigated these links by applying in-depth empirical methods to analyse data gathered from around the world.

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