scholarly journals CLASH: Climate (change) and cultural evolution of intergroup conflict

2017 ◽  
Vol 21 (3) ◽  
pp. 457-471 ◽  
Author(s):  
Paul A. M. van Lange ◽  
Maria I. Rinderu ◽  
Brad J. Bushman
Keyword(s):  
Climate Change ◽  
Life History ◽  
Seasonal Variation ◽  
Theoretical Model ◽  
Income Inequality ◽  
Cultural Evolution ◽  
Life History Strategy ◽  
Self Control ◽  
Intergroup Conflict ◽  
The Impact

Aggression and violence levels generally increase as one moves closer to the equator, but why? We developed a new theoretical model, CLimate, Aggression, and Self-control in Humans (CLASH; van Lange, Rinderu, & Bushman, 2017b, 2017c), to understand differences within and between countries in aggression and violence in terms of differences in climate. Colder temperatures, and especially larger degrees of seasonal variation in climate, call for individuals and groups to adopt a slower life history strategy, revealed in a greater focus on the future (vs. present) and a stronger focus on self-control—variables that are known to inhibit aggression and violence. Other variables (e.g., wealth, income inequality, parasite stress) are also linked to both climate differences and to aggression and violence differences. When people think of the consequences of climate change, they rarely think of the impact on aggression and violence levels, but they should. CLASH has broad implications for the effects of climate change on intergroup conflict.

scholarly journals The impact of sex ratio and economic status on local birth rates

2013 ◽  
Vol 9 (2) ◽  
pp. 20130027 ◽  
Author(s):  
A. Chipman ◽  
E. Morrison
Keyword(s):  
Life History ◽  
Sex Ratio ◽  
Economic Status ◽  
Life History Strategy ◽  
Reproductive Behaviour ◽  
Female Competition ◽  
Birth Rates ◽  
Economically Deprived ◽  
Human Mating ◽  
The Impact

Human mating and reproductive behaviour can vary depending on various mechanisms, including the local sex ratio. Previous research shows that as sex ratios become female-biased, women from economically deprived areas are less likely to delay reproductive opportunities to wait for a high-investing mate but instead begin their reproductive careers sooner. Here, we show that the local sex ratio also has an impact on female fertility schedules. At young ages, a female-biased ratio is associated with higher birth rates in the poorest areas, whereas the opposite is true for the richest areas. At older ages, a female-biased ratio is associated with higher birth rates in the richest, but not the poorest areas. These patterns suggest that female–female competition encourages poorer women to adopt a fast life-history strategy and give birth early, and richer women to adopt a slow life-history strategy and delay reproduction.

An alternative interpretation of climate data: Intelligence

2017 ◽  
Vol 40 ◽  
Author(s):  
Robert J. Sternberg
Keyword(s):  
Life History ◽  
Statistical Analysis ◽  
Life History Strategy ◽  
Alternative Interpretation ◽  
Self Control ◽  
Climate Data ◽  
State Variable ◽  
Target Article ◽  
Highly Correlated ◽  
Underlying Variable

AbstractThe CLASH model proposed in the target article is plausible but less than parsimonious. I suggest that statistical analysis probably would find slower life history strategy, greater focus on the future, and greater self-control to be highly correlated and perhaps unifactorial, because they are all manifestations of a single underlying variable, namely, intelligence. I suggest how intelligence as a state variable plausibly could explain the differences observed by the authors.

scholarly journals THE IMPACT OF SEASONALITY ON TOURIST’S ARRIVAL IN BANGLADESH BY USING SANCOVA MODEL

2021 ◽  
Vol 38 (4) ◽  
pp. 1118-1124
Author(s):  
Sayed Mohibul HOSSEN ◽  
◽  
Mohd Tahir ISMAIL ◽  
Mosab I. TABASH ◽  
Suhaib ANAGREH ◽  
...  
Keyword(s):  
Climate Change ◽  
Seasonal Variation ◽  
Tourism Industry ◽  
Climatic Variables ◽  
Modeling Framework ◽  
Impact Of Climate Change ◽  
Ancova Model ◽  
Minimum Variation ◽  
The Impact

In this study, we aim to highlight the impact of climate change as well as seasonality on tourist’s arrival in Bangladesh. The SANCOVA modeling framework modified by the ANCOVA model is used to examine the impact of climate change on tourists’ arrivals. The results show seasonality has a 91% effect on tourist’s arrival in Bangladesh. The maximum and minimum variation of climatic variables on tourists’ arrival in Bangladesh is rainfall and humidity, respectively. The winter and summer seasons have similar and more impact on tourist’s arrival in Bangladesh. Our findings indicate that the tourism industry of Bangladesh is more vulnerable to seasonal variation than the overall economy. The present study has significant implications for both policymakers and tourisms destination alike to plan for tourism in Bangladesh.

Lack of seasonal variation in the life-history strategies of the trematode Coitocaecum parvum: no apparent environmental effect

Parasitology ◽  
2008 ◽  
Vol 135 (10) ◽  
pp. 1243-1251 ◽  
Author(s):  
C. LAGRUE ◽  
R. POULIN
Keyword(s):  
Life History ◽  
Seasonal Variation ◽  
Life Cycle ◽  
Water Temperature ◽  
Intermediate Host ◽  
Definitive Host ◽  
Natural Environment ◽  
Life History Strategy ◽  
Life Cycles ◽  
Coitocaecum Parvum

SUMMARYParasites with complex life cycles have developed numerous and very diverse adaptations to increase the likelihood of completing this cycle. For example, some parasites can abbreviate their life cycles by skipping the definitive host and reproducing inside their intermediate host. The resulting shorter life cycle is clearly advantageous when definitive hosts are absent or rare. In species where life-cycle abbreviation is facultative, this strategy should be adopted in response to seasonally variable environmental conditions. The hermaphroditic trematode Coitocaecum parvum is able to mature precociously (progenesis), and produce eggs by selfing while still inside its amphipod second intermediate host. Several environmental factors such as fish definitive host density and water temperature are known to influence the life-history strategy adopted by laboratory raised C. parvum. Here we document the seasonal variation of environmental parameters and its association with the proportion of progenetic individuals in a parasite population in its natural environment. We found obvious seasonal patterns in both water temperature and C. parvum host densities. However, despite being temporally variable, the proportion of progenetic C. parvum individuals was not correlated with any single parameter. The results show that C. parvum life-history strategy is not as flexible as previously thought. It is possible that the parasite's natural environment contains so many layers of heterogeneity that C. parvum does not possess the ability to adjust its life-history strategy to accurately match the current conditions.

scholarly journals Life History, Fertility, and Short-Term Mating Motivation

2018 ◽  
Vol 16 (3) ◽  
pp. 147470491880006 ◽  
Author(s):  
Aekyoung Kim ◽  
Hannah Bradshaw ◽  
Kristina M. Durante ◽  
Sarah E. Hill
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Strategy ◽  
Single Women ◽  
Relationship Status ◽  
Cycle Phase ◽  
High Fertility ◽  
Ovulatory Cycle ◽  
Short Term ◽  
The Impact

The current research examines the impact of women’s early-life socioeconomic status (SES; used as a proxy measure of life history strategy), relationship status, and ovulatory cycle phase on their desire for short-term mating. Results revealed that during the periovulatory phase (i.e., the high-fertility phase of the monthly ovulatory cycle), single women from low SES environments expressed an increased desire for short-term mating, whereas the opposite was found for single women from high SES environments. No such pattern was found for partnered women. These results suggest that one’s early-life environment and relationship status may play a key role in how women respond to internal fertility cues, providing important new insights into factors that may moderate ovulatory shifts in mating behavior. Results provide some of the first evidence that one’s developmental history may alter the expression of ovulatory cycle adaptations.

The Logic of Climate and Culture: Evolutionary and Psychological Aspects of CLASH

2017 ◽  
Vol 40 ◽  
Author(s):  
Paul A. M. Van Lange ◽  
Maria I. Rinderu ◽  
Brad J. Bushman
Keyword(s):  
Theoretical Model ◽  
Income Inequality ◽  
Boundary Conditions ◽  
Human Behavior ◽  
Psychological Aspects ◽  
Self Control ◽  
Future Research ◽  
Scientific Disciplines ◽  
Wide Range

AbstractA total of 80 authors working in a variety of scientific disciplines commented on the theoretical model of CLimate, Aggression, and Self-control in Humans (CLASH). The commentaries cover a wide range of issues, including the logic and assumptions of CLASH, the evidence in support of CLASH, and other possible causes of aggression and violence (e.g., wealth, income inequality, political circumstances, historic circumstances, pathogen stress). Some commentaries also provide data relevant to CLASH. Here we clarify the logic and assumptions of CLASH and discusses its extensions and boundary conditions. We also offer suggestions for future research. Regardless of whether none, some, or all of CLASH is found to be true, we hope it will stimulate future research on the link between climate and human behavior. Climate is one of the most presing issues of our time.

scholarly journals The Impact of Climate Change on Income Inequality. Evidence from European Union Countries

2020 ◽  
Vol 15 (3) ◽  
pp. 223-235
Author(s):  
Albu Ada-Cristina ◽  
Albu Lucian-Liviu
Keyword(s):  
Climate Change ◽  
European Union ◽  
Income Inequality ◽  
Carbon Emissions ◽  
New Technologies ◽  
Member States ◽  
Eu Countries ◽  
European Union Countries ◽  
The Impact ◽  
The Relationship

Abstract We will investigate in this paper the relation between income inequality and climate change, taking into account that the increase of carbon emissions has among consequences the increase of inequalities. The most vulnerable to climate change are the poorest and less developed countries. Climate change represents an important challenge for EU policymakers and the transition to zerocarbon emissions will lead to greater social inclusion and convergence among EU countries. We use in this paper two-stage OLS in order to analyse the relationship between income inequality and carbon emissions in case of EU countries.. We apply our model to two groups of European Union countries, the old member states - EU15 and new member states - EU13. Our results confirm that there are important differences between the two groups regarding the relationship between climate change and income inequalities. Therefore, policies implemented at EU level are extremely important in order to mitigate the adverse effects of climate change on growing inequality and poverty in EU countries. Governments must invest in new technologies, industries and innovation in order to address the complex challenge posed by mitigating climate change.

scholarly journals Disease mediated changes to life history and demography threaten the survival of European amphibian populations

2017 ◽  
Author(s):  
Lewis J. Campbell ◽  
Trenton W. J. Garner ◽  
Giulia Tessa ◽  
Benjamin C. Scheele ◽  
Amber G.F. Griffiths ◽  
...  
Keyword(s):  
Life History ◽  
Infectious Diseases ◽  
Rana Temporaria ◽  
Life History Strategy ◽  
Adult Mortality ◽  
Population Declines ◽  
Individual Level ◽  
Historical Presence ◽  
Population Demographic ◽  
The Impact

AbstractInfectious diseases can influence the life history strategy of their hosts and such influences subsequently impact the demography of infected populations, reducing viability independently of increased mortality or morbidity. Amphibians are the most threatened group of vertebrates and emerging infectious diseases play a large role in their population declines. Viruses of genus Ranavirus are responsible for one of the deadliest of these diseases. To date no work has evaluated the impact of ranaviruses on host life-history post metamorphosis or population demographic structure at the individual level. In this study, we used skeletochronology and morphology to evaluate the impact of ranaviruses on the demography of populations of European common frog (Rana temporaria) in the United Kingdom. We compared ecologically similar populations that differed only in their historical presence or absence of ranaviral disease. Our results suggest that ranaviruses are associated with shifts in the age structure of infected populations, potentially caused by increased adult mortality and associated shifts in the life history of younger age classes. Population projection models indicate that such age truncation could heighten the vulnerability of frog populations to stochastic environmental challenges. Our individual level data provide further compelling evidence that the emergence of infectious diseases can alter host demography, subsequently increasing population vulnerability to additional stressors.

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