The contributions of maternal age heterogeneity to variance in lifetime reproductive output

Abstract Biotic factors (e.g., maternal age) and abiotic factors (e.g., weather) play vital roles in reproduction. However, there is little information about the combined effects of maternal age and weather on the reproductive output of cultured Asian yellow pond turtles, Mauremys mutica. To address this issue, we surveyed and compared the reproductive output of 13-year-old and 25-year-old female turtles on non-rainy and rainy days. The results showed that older females produced larger eggs than younger females regardless of the weather conditions. Females laid larger clutch sizes (number of eggs per nest) under non-rainy conditions compared with those under rainy conditions. However, the variation in clutch frequency (number of clutches per day) was independent of maternal age and weather. There was no effect of an interaction between maternal age and weather on egg mass, clutch size or clutch frequency. Our results suggest that maternal age and weather had significant effects on egg mass and clutch size, respectively. These results imply that maternal age, together with weather conditions (mainly conditions of rain), can affect the reproductive output of M. mutica. Our results provide useful information for the artificial breeding and stock management of M. mutica.

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Maternal body size and age govern reproduction and offspring phenotype in the ladybird, Menochilus sexmaculatus

Canadian Journal of Zoology ◽

10.1139/cjz-2020-0152 ◽

2020 ◽

Author(s):

Shashwat Singh ◽

Geetanjali Mishra ◽

Omkar Omkar

Keyword(s):

Body Size ◽

Maternal Effects ◽

Maternal Age ◽

Reproductive Output ◽

Life History Traits ◽

Middle Age ◽

Adaptive Strategy ◽

Egg Mass ◽

Developmental Duration ◽

Feeding Regimes

Maternal effects are possible channels through which mothers provision their offspring differentially, thereby affecting offspring phenotype. We investigated maternal effects in the ladybird, Menochilus sexmaculatus (Fabricius, 1781), in response to body size (induced by different feeding regimes during larval development) and their age within the reproductive cycle. Different sized females were permitted to mate and were provided with daily replenished ad libitum prey. Post mating, reproductive output and developmental duration of offspring from different oviposition days were recorded. We hypothesised that small females would lay smaller and fewer eggs than larger females, and that egg mass would also reduce with increased maternal age. In our study, the larger mothers laid more eggs per day. Small and large mothers oviposited maximally at middle age. Maternal age did not influence the egg mass, although it was slightly higher in the case of older, larger females. Offspring from old aged small and large mothers developed rapidly. This nimble development could be an adaptive strategy for the use of ephemeral aphid patches. The results of the study are indicative of this ladybird species’ ability to adjust their offspring’s life history traits, a feature more prominent in larger females.

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Reproductive output, maternal age, and survivorship in captive common marmoset females (Callithrix jacchus)

American Journal of Primatology ◽

10.1002/ajp.20065 ◽

2004 ◽

Vol 64 (1) ◽

pp. 107-121 ◽

Cited By ~ 37

Author(s):

Darlene A. Smucny ◽

David H. Abbott ◽

Keith G. Mansfield ◽

Nancy J. Schultz-Darken ◽

M. Emilia Yamamoto ◽

...

Keyword(s):

Maternal Age ◽

Reproductive Output ◽

Common Marmoset ◽

Callithrix Jacchus

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Indicator Profile of Birth Defects: Down Syndrome: Down Syndrome Birth Prevalence by Maternal Age, Utah, 1995-2006

PsycEXTRA Dataset ◽

10.1037/e570352011-001 ◽

2008 ◽

Keyword(s):

Down Syndrome ◽

Birth Defects ◽

Maternal Age ◽

Birth Prevalence

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First trimester ultrasound screening for trisomy 21 based on maternal age, fetal nuchal translucency and different combinations of the additional markers nasal bone, tricuspid and ductus venosus flow

Ultraschall in der Medizin - European Journal of Ultrasound ◽

10.1055/s-0035-1558776 ◽

2015 ◽

Vol 36 (S 01) ◽

Author(s):

KO Kagan ◽

M Hoopmann ◽

P Wagner ◽

H Abele

Keyword(s):

Trisomy 21 ◽

Maternal Age ◽

Nasal Bone ◽

First Trimester ◽

Nuchal Translucency ◽

Ductus Venosus ◽

Ultrasound Screening ◽

First Trimester Ultrasound

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Maternal Knowledge Factor, Maternal Age and Maternal Parity Associated with Genesis of Normal Delivery at Palembang Hospital of Bari Year 2017

SRIWIJAYA JOURNAL OF MEDICINE ◽

10.32539/sjm.v1i1.7 ◽

2018 ◽

Vol 1 (1) ◽

pp. 43-50

Author(s):

Juliana Widyastuti Wahyuningsih

Keyword(s):

Maternal Age ◽

World Health ◽

Survey Method ◽

P Value ◽

Maternal Knowledge ◽

Cross Sectional ◽

Normal Delivery ◽

Significance Level ◽

Birth Canal ◽

Maternal Parity

Childbirthis a processLabor of opening and depleting the cervix and the fetus down into the birth canal. Birth is a process in which the fetus and amniotic are pushed out through the birth canal. (Sarwono, 2008). According to the World Health Organization (WHO) estimates more than 585,000 mothers annually die during pregnancy or childbirth. Indonesia Health Demographic Survey (SDKI) Survey in 2012, Maternal Mortality Rate in Indonesia is still high at 359 per 100,000 live births. The purpose of this study is the knowledge of maternal knowledge, maternal age, and maternal parity associated with normal birth events at Palembang Bari Hospital 2017. This study used analytical survey method with cross sectional approach. The population in this study were all maternal mothers at the Palembang Bari Hospital in 2017. Sampling in the study was conducted non-randomly with the technique of "Accidental Sampling". Data analysis was done univariat and bivariate with Chi-Square statistical test with significance level α = 0,05. The result of this research shows that there is correlation between mother's knowledge with normal delivery incidence with p value 0,001, there is correlation between mother age with normal delivery incidence with p value 0,009, there is relation between mother parity with normal delivery incidence with p value 0,001. From result of this research hopes healthcare workers can improve normal delivery care services and more often to carry out maternal safety counseling.

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Parental breeding age effects on descendants’ longevity interact over two generations in matrilines and patrilines

10.32942/osf.io/mnx8h ◽

2019 ◽

Author(s):

Zac Wylde ◽

Foteini Spagopoulou ◽

Amy K Hooper ◽

Alexei A Maklakov ◽

Russell Bonduriansky

Keyword(s):

Maternal Age ◽

First Generation ◽

Age Effects ◽

Population Variation ◽

Paternal Age ◽

Interactive Effects ◽

Competitive Environment ◽

Larval Diet ◽

Negative Effects ◽

Two Generations

Individuals within populations vary enormously in mortality risk and longevity, but the causes of this variation remain poorly understood. A potentially important and phylogenetically widespread source of such variation is maternal age at breeding, which typically has negative effects on offspring longevity. Here, we show that paternal age can affect offspring longevity as strongly as maternal age does, and that breeding age effects can interact over two generations in both matrilines and patrilines. We manipulated maternal and paternal ages at breeding over two generations in the neriid fly Telostylinus angusticollis. To determine whether breeding age effects can be modulated by the environment, we also manipulated larval diet and male competitive environment in the first generation. We found separate and interactive effects of parental and grandparental ages at breeding on descendants’ mortality rate and lifespan in both matrilines and patrilines. These breeding age effects were not modulated by grandparental larval diet quality or competitive environment. Our findings suggest that variation in maternal and paternal ages at breeding could contribute substantially to intra-population variation in mortality and longevity.

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