Results 31 to 40 of about 4,171 (204)
Fertility Decline in Malawi: A Decomposition Analysis
PopulasiFertility in Malawi has been declining since the late 1980s. Total Fertility Rate is reported to have declined by 1.1 children per woman from 5.7 in 2010 to 4.6 in 2015. This reduction indicates a continuing rapid decline in fertility in the country.
Martin Enock Palamuleni
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Tracking the decline of first marriage in South Korea: Timing, quantum decline, and pandemic disruptions [PDF]
Demographic ResearchBACKGROUND: In South Korea, where most births occur within marriage, the country’s record-low fertility has put renewed attention on the long-term decline in first marriage.
Sam Hyun Yoo
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Ips acuminatus (Gyllenhal) in the Czech Republic: Flight dynamics and adult population structure
Physiological Entomology, Volume 51, Issue 1, Page 136-146, March 2026.Ips acuminatus exhibits a univoltine life cycle in Central Europe and no full second generation in midsummer. The sex ratio shifts from male‐biased in spring to slightly female‐biased with the season, with over 90% of females mated. Among the pheromone lures tested, the ACP was most attractive, and combining ACP and PH lures could be used for effective
Daniela Hlávková +3 more
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Demographic Research, 2018 Background: In the second half of the 20th century, remarkable marriage changes were seen: a great proportion of never married population, high average age at first marriage, and large variance in first marriage timing.
Ryohei Mogi, Vladimir Canudas-Romo
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Ecology and Evolution, Volume 16, Issue 2, February 2026.Precopulatory mating behaviour, are important for fitness and can be disrupted by heatwave's. Here we assess how differing levels of intrasexual and intrasexual selection in precopulatory mating behaviours impacts fitness responses to heatwaves. We find that the likelihood of having a brood is impacted by differences in intrasexual and intersexual ...
Karendeep K. Sidhu +4 more
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Was malthus right? a var analysis of economic and demographic interactions in pre-industrial England [PDF]
, 2006 This paper shows that the interaction between economic and demographic variables in England before the onset of modern economic growth did not fit some crucial assumptions of the Malthusian model. I estimated a vector autoregression for data on fertility,
Nicolini Alessi, Esteban
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Sexual Dimorphism in Fin Size and Shape in Bluefin Killifish
Ecology and Evolution, Volume 16, Issue 2, February 2026.This study shows very high levels of sexual dimorphism in dorsal and anal fin traits compared to other fins. Dorsal and anal fin traits are also correlated, such that individuals with large dorsal fins also have large anal fins. Together, this suggests strong sexual selection on these functionally integrated traits.
Kasey Brockelsby +4 more
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A New Classification Framework to Understand Evolutionary Transitions in Individuality
BioEssays, Volume 48, Issue 1, January 2026.Classifying biological entities based on whether and how the two fundamental aspects physiological and evolutionary components are represented yields six types of structural organization. The resulting framework allows to compare different forms of organization, and, in this way, provides insight into the evolutionary processes giving rise to these ...
Saskia Wilmsen, Christian Kost
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Nuptiality in Early 20th Century Yekaterinburg: Quantitative Analysis
Известия Уральского федерального университета. Серия 2: Гуманитарные науки, 2019 This article analyses one of the main characteristics of the demographic behaviour of Russian citizens, i.e. their age at first marriage and its dynamics in the early twentieth century. The authors examine the situation in Yekaterinburg, a compact but an
Elena Mikhailovna Glavatskaya +3 more
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Ecology and Evolution, Volume 16, Issue 1, January 2026.We investigate the effect of previous mating opportunities with con‐ and heterospecifics on the subsequent mating decisions of male Lygaeus simulans seed bugs. We found that males were less likely to copulate with both con‐ and heterospecific females if they had previously encountered a heterospecific female, and more likely to copulate with ...
Vicki L. Balfour +3 more
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