Successful breeding predicts divorce in plovers

AbstractWhen individuals breed more than once, parents are faced with the choice of whether to re-mate with their old partner or divorce and select a new mate. Evolutionary theory predicts that, following successful reproduction with a given partner, that partner should be retained for future reproduction. However, recent work in a polygamous bird, has instead indicated that successful parents divorced more often than failed breeders (Halimubieke et al. in Ecol Evol 9:10734–10745, 2019), because one parent can benefit by mating with a new partner and reproducing shortly after divorce. Here we investigate whether successful breeding predicts divorce using data from 14 well-monitored populations of plovers (Charadrius spp.). We show that successful nesting leads to divorce, whereas nest failure leads to retention of the mate for follow-up breeding. Plovers that divorced their partners and simultaneously deserted their broods produced more offspring within a season than parents that retained their mate. Our work provides a counterpoint to theoretical expectations that divorce is triggered by low reproductive success, and supports adaptive explanations of divorce as a strategy to improve individual reproductive success. In addition, we show that temperature may modulate these costs and benefits, and contribute to dynamic variation in patterns of divorce across plover breeding systems.

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Early-life reproduction is associated with increased mortality risk but enhanced lifetime fitness in pre-industrial humans

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2014.3053 ◽

2015 ◽

Vol 282 (1804) ◽

pp. 20143053 ◽

Cited By ~ 19

Author(s):

Adam D. Hayward ◽

Ilona Nenko ◽

Virpi Lummaa

Keyword(s):

Reproductive Success ◽

Evolutionary Theory ◽

Mortality Risk ◽

Early Life ◽

Later Life ◽

Lifetime Reproductive Success ◽

Reproductive Senescence ◽

Trade Offs ◽

Investment In Reproduction ◽

Using Data

The physiology of reproductive senescence in women is well understood, but the drivers of variation in senescence rates are less so. Evolutionary theory predicts that early-life investment in reproduction should be favoured by selection at the cost of reduced survival and faster reproductive senescence. We tested this hypothesis using data collected from preindustrial Finnish church records. Reproductive success increased up to age 25 and was relatively stable until a decline from age 41. Women with higher early-life fecundity (ELF; producing more children before age 25) subsequently had higher mortality risk, but high ELF was not associated with accelerated senescence in annual breeding success. However, women with higher ELF experienced faster senescence in offspring survival. Despite these apparent costs, ELF was under positive selection: individuals with higher ELF had higher lifetime reproductive success. These results are consistent with previous observations in both humans and wild vertebrates that more births and earlier onset of reproduction are associated with reduced survival, and with evolutionary theory predicting trade-offs between early reproduction and later-life survival. The results are particularly significant given recent increases in maternal ages in many societies and the potential consequences for offspring health and fitness.

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Darwinian Evolutionary Theory

10.1093/oso/9780190867577.003.0001 ◽

2018 ◽

Author(s):

Michael Ruse

Keyword(s):

Sexual Selection ◽

Natural Selection ◽

Middle Class ◽

Evolutionary Theory ◽

Scientific Community ◽

Homo Sapiens ◽

Origin Of Species ◽

Theory Of Evolution ◽

Descent Of Man

Charles Robert Darwin, the English naturalist, published On the Origin of Species in 1859 and the follow-up work The Descent of Man in 1871. In these works, he argued for his theory of evolution through natural selection, applying it to all organisms, living and dead, including our own species, Homo sapiens. Although controversial from the start, Darwin’s thinking was deeply embedded in the culture of his day, that of a middle-class Englishman. Evolution as such was an immediate success in scientific circles, but although the mechanism of selection had supporters in the scientific community (especially among those working with fast-breeding organisms), its real success was in the popular domain. Natural selection, and particularly the side mechanism of sexual selection, were known to all and popular themes in fiction and elsewhere.

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Postweaning maternal care increases male chimpanzee reproductive success

Science Advances ◽

10.1126/sciadv.aaz5746 ◽

2020 ◽

Vol 6 (38) ◽

pp. eaaz5746

Author(s):

Catherine Crockford ◽

Liran Samuni ◽

Linda Vigilant ◽

Roman M. Wittig

Keyword(s):

Reproductive Success ◽

Parental Investment ◽

Maternal Care ◽

Parental Loss ◽

Male Reproductive Success ◽

Complex Societies ◽

Successful Reproduction ◽

Using Data

Humans are unusual among animals for continuing to provision and care for their offspring until adulthood. This “prolonged dependency” is considered key for the evolution of other notable human traits, such as large brains, complex societies, and extended postreproductive lifespans. Prolonged dependency must therefore have evolved under conditions in which reproductive success is gained with parental investment and diminished with early parental loss. We tested this idea using data from wild chimpanzees, which have similarly extended immature years as humans and prolonged mother-offspring associations. Males who lost their mothers after weaning but before maturity began reproducing later and had lower average reproductive success. Thus, persistent mother-immature son associations seem vital for enhancing male reproductive success, although mothers barely provision sons after weaning. We posit that these associations lead to social gains, crucial for successful reproduction in complex social societies, and offer insights into the evolution of prolonged dependency.

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Years of potential life lost in pre-diabetes and diabetes mellitus: data from a 40-year follow-up of the Israel study on Glucose intolerance, Obesity and Hypertension

BMJ Open Diabetes Research & Care ◽

10.1136/bmjdrc-2020-001981 ◽

2021 ◽

Vol 9 (1) ◽

pp. e001981

Author(s):

Micha Rapoport ◽

Angela Chetrit ◽

Dror Cantrell ◽

Ilya Novikov ◽

Jesse Roth ◽

...

Keyword(s):

Glucose Intolerance ◽

Lifestyle Modification ◽

Smoking Status ◽

Age Groups ◽

Tolerance Test ◽

High Risk Group ◽

Oral Glucose ◽

Average Difference ◽

Using Data

IntroductionWe examined years of potential life lost (YPLL) associated with pre-diabetes as compared with either normoglycemia or diabetes, using data of the Israel cohort of Glucose intolerance, Obesity and Hypertension 40-year follow-up.Research design and methodsMen and women (N=2844, mean age 52.0±8.2 years) who underwent oral glucose tolerance test and anthropometric measurements, during 1976–1982, were followed for mortality until May 2019. Multiple imputation procedures for missing mortality dates and multivariable regression mixed models were applied.ResultsAt baseline, 35.8%, 48.8% and 15.4% individuals were found with normoglycemia, pre-diabetes, and diabetes, respectively. The average difference in YPLL associated with pre-diabetes as compared with normoglycemia was 4.3 years (95% CI 3.3 to 5.2; p<0.001). YPLL were 1 year higher in women with pre-diabetes than in men with pre-diabetes. These differences persisted mainly in individuals younger than 60 years, and those with body mass index (BMI) <25 kg/m2, at baseline. Adjusting for age, sex, country of origin, smoking status, BMI, and blood pressure, the average difference in YPLL associated with pre-diabetes as compared with normoglycemia was 2.0 years (95% CI 1.2 to 2.8; p<0.001). Significant reductions of 5.9 years (95% CI 4.8 to 7.0) on average were observed for diabetes as compared with pre-diabetes and 7.9 years (95% CI 6.7 to 9.1) as compared with individuals with normoglycemia.ConclusionsThis study reveals that life expectancy of middle-aged individuals with pre-diabetes is shorter than of normoglycemic ones. These findings are especially relevant in view of the rising worldwide prevalence of pre-diabetes within younger age groups and underscore the crucial importance of interventions by either lifestyle modification or drug therapy capable of delaying progression from pre-diabetes to diabetes to reduce the YPLL in this high-risk group.

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Serum C-reactive protein metabolite (CRPM) is associated with incidence of contralateral knee osteoarthritis

Scientific Reports ◽

10.1038/s41598-021-86064-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Anne-Christine Bay-Jensen ◽

Asger Bihlet ◽

Inger Byrjalsen ◽

Jeppe Ragnar Andersen ◽

Bente Juhl Riis ◽

...

Keyword(s):

Phase Iii ◽

Response To Treatment ◽

C Reactive Protein ◽

Two Phase ◽

Knee Oa ◽

Reactive Protein ◽

Inflammatory Phenotype ◽

The Mean ◽

Using Data

AbstractThe heterogeneous nature of osteoarthritis (OA) and the need to subtype patients is widely accepted in the field. The biomarker CRPM, a metabolite of C-reactive protein (CRP), is released to the circulation during inflammation. Blood CRPM levels have shown to be associated with disease activity and response to treatment in rheumatoid arthritis (RA). We investigated the level of blood CRPM in OA compared to RA using data from two phase III knee OA and two RA studies (N = 1591). Moreover, the association between CRPM levels and radiographic progression was investigated. The mean CRPM levels were significantly lower in OA (8.5 [95% CI 8.3–8.8] ng/mL, n = 781) compared to the RA patients (12.8 [9.5–16.0] ng/mL, n = 60); however, a significant subset of OA patients (31%) had CRPM levels (≥ 9 ng/mL) comparable to RA. Furthermore, OA patients (n = 152) with CRPM levels ≥ 9 ng/mL were more likely to develop contra-lateral knee OA assessed by X-ray over a two-year follow-up period with an odds ratio of 2.2 [1.0–4.7]. These data suggest that CRPM is a blood-based biochemical marker for early identification OA patients with an inflammatory phenotype.

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Is Continuous Eruption Related to Periodontal Changes? A 16-Year Follow-up

Journal of Dental Research ◽

10.1177/0022034521999363 ◽

2021 ◽

pp. 002203452199936

Author(s):

C. Wiedemann ◽

C. Pink ◽

A. Daboul ◽

S. Samietz ◽

H. Völzke ◽

...

Keyword(s):

Tooth Wear ◽

Total Sample ◽

Population Based ◽

Tooth Eruption ◽

Reference Points ◽

3 Dimensional ◽

Probing Depth ◽

Molar Teeth ◽

Using Data

The aims of this study were to 1) determine if continuous eruption occurs in the maxillary teeth, 2) assess the magnitude of the continuous eruption, and 3) evaluate the effects of continuous eruption on the different periodontal parameters by using data from the population-based cohort of the Study of Health in Pomerania (SHIP). The jaw casts of 140 participants from the baseline (SHIP-0) and 16-y follow-up (SHIP-3) were digitized as 3-dimensional models. Robust reference points were set to match the tooth eruption stage at SHIP-0 and SHIP-3. Reference points were set on the occlusal surface of the contralateral premolar and molar teeth, the palatal fossa of an incisor, and the rugae of the hard palate. Reference points were combined to represent 3 virtual occlusal planes. Continuous eruption was measured as the mean height difference between the 3 planes and rugae fix points at SHIP-0 and SHIP-3. Probing depth, clinical attachment levels, gingiva above the cementoenamel junction (gingival height), and number of missing teeth were clinically assessed in the maxilla. Changes in periodontal variables were regressed onto changes in continuous eruption after adjustment for age, sex, number of filled teeth, and education or tooth wear. Continuous tooth eruption >1 mm over the 16 y was found in 4 of 140 adults and averaged to 0.33 mm, equaling 0.021 mm/y. In the total sample, an increase in continuous eruption was significantly associated with decreases in mean gingival height ( B = −0.34; 95% CI, −0.65 to −0.03). In a subsample of participants without tooth loss, continuous eruption was negatively associated with PD. This study confirmed that continuous eruption is clearly detectable and may contribute to lower gingival heights in the maxilla.

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Positive and negative face as descriptive categories in the history of English

Journal of Historical Pragmatics ◽

10.1075/jhp.12.1-2.08juc ◽

2011 ◽

Vol 12 (1-2) ◽

pp. 178-197 ◽

Cited By ~ 8

Author(s):

Andreas H. Jucker

Keyword(s):

Recent Work ◽

Middle English ◽

Old English ◽

General Trend ◽

Clear Distinction ◽

History Of ◽

Negative Face

Studies in the history of politeness in English have generally relied on the notions of positive and negative face. While earlier work argued that a general trend from positive politeness to negative politeness can be observed, more recent work has shown that in Old English and in Middle English face concerns were not as important as in Modern English and that, in certain contexts, there are also opposing tendencies from negative to positive politeness. In this paper, I focus in more detail on the notions of positive and negative face and follow up earlier suggestions that for negative face a clear distinction must be made between deference politeness and non-imposition politeness. On this basis, I assess the usefulness of the notions of positive and negative face for the development of politeness in the history of English.

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