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.

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.

scholarly journals Short-term exposure of Chinook salmon (Oncoryhnchus tshawytscha) to o,p-DDE or DMSO during early life-history stages causes long-term humoral immunosuppression.

2003 ◽  
Vol 111 (13) ◽  
pp. 1601-1607 ◽  
Author(s):  
Ruth H Milston ◽  
Martin S Fitzpatrick ◽  
Anthony T Vella ◽  
Shaun Clements ◽  
Deke Gundersen ◽  
...  
Keyword(s):  
Life History ◽  
Chinook Salmon ◽  
Early Life ◽  
Early Life History ◽  
Short Term ◽  
Life History Stages ◽  
Short Term Exposure

Reproductive biology, early life-history and settlement distribution of sand flathead (Platycephalus bassensis) in Tasmania

2001 ◽  
Vol 52 (4) ◽  
pp. 589 ◽  
Author(s):  
Alan R. Jordan
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Strategy ◽  
Extended Period ◽  
Early Life History ◽  
Larval Transport ◽  
Spatial And Temporal Patterns ◽  
Spawning Period ◽  
Large Size ◽  
Settlement Distribution

The life-history ecology of P. bassensis was examined to determine the spatial and temporal patterns of spawning, larval transport and settlement distribution in coastal and continental shelf waters of southern and eastern Tasmania. Larval development is characterized by a large size at flexion and pelvic and dorsal fin formation, lightly pigmented trunk and tail and the absence of strong teeth on the roof of the mouth or lower jaw. The distribution of spawning fish and larvae and patterns of hydrography indicate that spawning occurs throughout estuaries, coastal embayments and inshore shelf waters of southern and eastern Tasmania. Larvae are concentrated in mid waters, which retain larvae inshore because cross-shelf subsurface currents are predominantly onshore. Spawning in P. bassensis occurred for up to six months between October and March. The broad range of lengths of 0+ fish in every month indicates that settlement occurred over an extended period, reflecting the protracted spawning period. Juveniles showed a preference for unvegetated habitats in nearshore waters, compared with beds of the seagrass Heterozostera tasmanica. Size compositions of 0+ fish indicate the presence of several cohorts in most months;this is discussed in terms of early life-history strategy and availability of settlement habitats.

Short-term variations in the early life history traits of common sardine Strangomera bentincki and anchoveta Engraulis ringens off central Chile

2020 ◽  
Vol 224 ◽  
pp. 105460 ◽  
Author(s):  
Victor Molina-Valdivia ◽  
Mauricio F. Landaeta ◽  
Manuel I. Castillo ◽  
Darly Alarcón ◽  
Guido Plaza
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Early Life History ◽  
Short Term ◽  
Central Chile ◽  
Engraulis Ringens

Early life-history strategy of Cape hake in the Benguela upwelling region

2007 ◽  
Vol 86 (2-3) ◽  
pp. 179-187 ◽  
Author(s):  
B. Grote ◽  
W. Ekau ◽  
W. Hagen ◽  
J.A. Huggett ◽  
H.M. Verheye
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Strategy ◽  
Early Life History ◽  
Benguela Upwelling

A comparison of cane toad and native tadpoles as predators of native anuran eggs, hatchlings and larvae

1998 ◽  
Vol 25 (4) ◽  
pp. 373 ◽  
Author(s):  
Michael R. Crossland
Keyword(s):  
Life History ◽  
Early Life ◽  
Quantitative Data ◽  
Laboratory Experiments ◽  
Early Life History ◽  
Water Bodies ◽  
Cane Toad ◽  
Life History Stages ◽  
The Impact ◽  
Toad Bufo

Few quantitative data exist regarding the impact of the introduced cane toad, Bufo marinus, on native Australian fauna. This study investigated predation by tadpoles of B. marinus and two native anurans (Limnodynastes ornatus and Litoria rubella) on eggs, hatchlings and larvae of native anurans that co-occur with these tadpoles in temporary and semi-permanent water bodies in northern Queensland. During controlled laboratory experiments, neither small nor large B. marinus tadpoles were significant predators of native anuran eggs, hatchlings or tadpoles. Small tadpoles of L. ornatus also did not prey significantly upon native anuran eggs, hatchlings or tadpoles. However, large tadpoles of L. ornatus and, to a lesser extent, L. rubella were often significant predators of native anuran eggs and hatchlings, but were not significant predators of native tadpoles. The results suggest that native tadpoles are often likely to have a greater impact on the survival of early life history stages of native anurans via predation than areB. marinus tadpoles.

scholarly journals LINKING FAMILY TRANSITIONS AND LATER-LIFE DEPRESSION: DOES LIFE-COURSE SOCIOECONOMIC STANDING MATTER?

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S576-S577
Author(s):  
Claudia Recksiedler ◽  
Boris Cheval ◽  
Stefan Sieber ◽  
Robert S Stawski ◽  
Stephane Cullati
Keyword(s):  
Life Course ◽  
Early Life ◽  
Linear Models ◽  
Later Life ◽  
Single Women ◽  
Family Transitions ◽  
Early Life Adversity ◽  
Marital Transitions ◽  
The Impact ◽  
Over Time

Abstract Research documented the impact of marital transitions—particularly marital loss—on depression in old age, yet its severity depends multiple factors. Individuals’ capability to cope with transitions depends on available resources and previous exposure to stressors, such as early-life adversity, which buffers or aggravates the impact of marital transitions on later-life depression. Although studies documented the pivotal link between early-life adversity and negative health trajectories, our study is the first attempt to examine whether early-life adversity influences the relationship between prospectively-tracked, later-life marital transitions and depression. We drew data from SHARE, which samples individuals aged 50+ across Europe (N = 13,258; 2004-2016). Using multilevel linear models, we found that women who became widowed had higher levels of depression compared to coupled and single women, but experienced lower increases in depression over time. After adjusting for early-life and adulthood SES, losing a partner remained significantly associated with depression. Life-course SES was associated with levels of depression, yet interactions between marital transitions and SES were not, with some exceptions: single women who reported difficulties in their ability to make ends meet experience higher increases of depression over time. Overall, results were similar for men. Interactions between family transitions and SES were again not significant, with a few exceptions for single men: those born in more childhood conditions, and those with high education, had lower levels of depression. We interpret and discuss our findings through the lens of life-course and stress-resiliency perspectives and in light of changing family dynamics for this age group.

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