scholarly journals The role of maternal age and context-dependent maternal effects in the offspring provisioning of a long-lived marine teleost

2018 ◽  
Vol 5 (1) ◽  
pp. 170966 ◽  
Author(s):  
Linsey M. Arnold ◽  
Wade D. Smith ◽  
Paul D. Spencer ◽  
Allison N. Evans ◽  
Scott A. Heppell ◽  
...  
Keyword(s):  
Maternal Effects ◽  
Maternal Age ◽  
Narrow Range ◽  
Somatic Growth ◽  
Age Effects ◽  
Offspring Quality ◽  
Young Females ◽  
Context Dependent ◽  
Intrinsic Function

Despite evidence of maternal age effects in a number of teleost species, there have been challenges to the assertion that maternal age intrinsically influences offspring quality. From an evolutionary perspective, maternal age effects result in young females paradoxically investing in less fit offspring despite a greater potential fitness benefit that might be gained by allocating this energy to individual somatic growth. Although a narrow range of conditions could lead to a maternal fitness benefit via the production of lower quality offspring, evolutionary theorists suggest these conditions are seldom met and that the reported maternal age effects are more likely products of the environmental context. Our goal was to determine if maternal effects operated on offspring provisioning in a long-lived rockfish (genus Sebastes ), and to evaluate any such effects as an intrinsic function of maternal age or a context-dependent effect of the offspring release environment. We found that offspring provisioning is a function of both maternal age and the timing of offspring release; older females exhibit increased provisioning over younger females throughout the spawning season despite a decrease in provisioning across all maternal ages as the season progresses. These findings suggest a role for both maternal age effects and a potential context-dependent maternal effect in population productivity, carrying important implications when modelling population persistence and resilience.

Maternal effects on offspring growth rate and weaning mass in harbour seals

2001 ◽  
Vol 79 (6) ◽  
pp. 1088-1101 ◽  
Author(s):  
W Don Bowen ◽  
Sara L Ellis ◽  
Sara J Iverson ◽  
Daryl J Boness
Keyword(s):  
Growth Rate ◽  
Nova Scotia ◽  
Path Analysis ◽  
Maternal Effects ◽  
Maternal Age ◽  
Mass Gain ◽  
Phoca Vitulina ◽  
Young Females ◽  
Harbour Seals ◽  
Offspring Growth

We studied maternal effects on offspring traits during lactation in harbour seals (Phoca vitulina) on Sable Island, Nova Scotia, from 1988 to 1996. Duration of lactation was correlated with rate of pup mass gain (r = %#150;0.34, n = 116) and weaning mass (r = 0.29, n = 154). Pups that grew faster had shorter nursing periods, whereas those that attained higher weaning masses nursed for a greater number of days. Pup sex did not affect patterns of maternal effects. The pups of young females (4%#150;6 years old) gained mass at a constant but lower rate (0.56 kg/d) than the pups of older females through midlactation (0.74%#150;0.78 kg/d; n = 75). In older females, rates of pup mass gain decelerated between mid and late lactation. Although maternal age did not directly affect weaning mass of pups, path analysis showed that maternal age acted on weaning mass through intermediary traits. Lighter females gave birth to smaller and slower growing pups, but invested relatively more than heavier females (n = 153). Effects of maternal postpartum mass on weaning mass (n = 100) were weaker in harbour seals than in phocids that fast during lactation, but apparently stronger than in otariids that forage during lactation, suggesting that the strength of maternal effects is influenced by lactation strategy.

scholarly journals Maternal age and maternal environment affect stress reactivity and measures of social behaviour in laying hens

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mariana R. L. V. Peixoto ◽  
Leanne Cooley ◽  
Tina M. Widowski
Keyword(s):  
Stress Response ◽  
Maternal Effects ◽  
Social Stress ◽  
Maternal Age ◽  
Stress Reactivity ◽  
Laying Hens ◽  
Age Effects ◽  
Maternal Environment ◽  
Positive Effects ◽  
Parent Stock

AbstractMaternal effects can shape the phenotypes of offspring, but the extent to which a layer breeder’s experience can affect commercial laying hens remains unclear. We aimed to investigate the effects of maternal age and maternal environment on laying hens’ behaviour and stress response. In our first experiment (E1), commercial hybrid hens were reared either in aviary or barren brooding cages, then housed in aviary, conventional cages or furnished (enriched) cages, thus forming different maternal housing treatments. Hens from each treatment were inseminated at three ages, and measures of response to manual restraint and social stress were assessed in offspring. In experiment 2 (E2), maternal age effects on offsprings' stress response were further investigated using fertile eggs from commercial breeder flocks at three ages. In E1, maternal age affected struggling and corticosterone during manual restraint, feather pecking and pulling and comb wounds. Additionally, maternal rearing and housing in aviary systems showed positive effects on measures of behaviour and stress response in offspring. Effects of maternal age were not replicated in E2, possibly due to methodological differences or higher tolerance to maternal effects in commercial breeders. Overall, we recommend researchers report parent stock age to increase comparison across studies and thus our understanding of maternal age effects.

scholarly journals Anopheles gambiae maternal age and parous state control offspring susceptibility to Plasmodium falciparum

2020 ◽  
Author(s):  
Christian Mitri ◽  
Isabelle Thiery ◽  
Marie-Thérèse Lecoq ◽  
Catherine Thouvenot ◽  
Solange Touron ◽  
...  
Keyword(s):  
Plasmodium Falciparum ◽  
Anopheles Gambiae ◽  
Malaria Transmission ◽  
Maternal Effects ◽  
Maternal Age ◽  
Gonotrophic Cycle ◽  
State Control ◽  
Reproductive State ◽  
Young Females ◽  
Old Females

AbstractMaternal effects have been reported in many organisms whereby exposure to environmental stress, either toxics or pathogens will impact on progeny response to these stresses. Here we show that Anopheles gambiae susceptibility to Plasmodium falciparum is dependent upon maternal effects driven by females not previously exposed to the parasite. The maternal effect involved both mother age and reproductive state. Offspring of old females or from a 4th gonotrophic cycle are more susceptible than offspring from young females. These maternal effects also contribute to overall better fitness of the offspring. As mosquito population age structure contributes heavily shaping malaria transmission, consequences of this novel finding should be taken into account in further strategies for controlling malaria transmission.

Forming Impressions of Personality

2014 ◽  
Vol 45 (3) ◽  
pp. 153-163 ◽  
Author(s):  
Sanne Nauts ◽  
Oliver Langner ◽  
Inge Huijsmans ◽  
Roos Vonk ◽  
Daniël H. J. Wigboldus
Keyword(s):  
Impression Formation ◽  
Context Dependent

Asch’s seminal research on “Forming Impressions of Personality” (1946) has widely been cited as providing evidence for a primacy-of-warmth effect, suggesting that warmth-related judgments have a stronger influence on impressions of personality than competence-related judgments (e.g., Fiske, Cuddy, & Glick, 2007 ; Wojciszke, 2005 ). Because this effect does not fit with Asch’s Gestalt-view on impression formation and does not readily follow from the data presented in his original paper, the goal of the present study was to critically examine and replicate the studies of Asch’s paper that are most relevant to the primacy-of-warmth effect. We found no evidence for a primacy-of-warmth effect. Instead, the role of warmth was highly context-dependent, and competence was at least as important in shaping impressions as warmth.

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

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.

scholarly journals Effects of maternal age and stress on offspring quality in a viviparous fly

2021 ◽  
Author(s):  
Jennifer S. Lord ◽  
Robert Leyland ◽  
Lee R. Haines ◽  
Antoine M. G. Barreaux ◽  
Michael B. Bonsall ◽  
...  
Keyword(s):  
Maternal Age ◽  
Offspring Quality

scholarly journals Role of thermal field in entanglement harvesting between two accelerated Unruh-DeWitt detectors

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Dipankar Barman ◽  
Subhajit Barman ◽  
Bibhas Ranjan Majhi
Keyword(s):  
Mutual Information ◽  
Critical Point ◽  
Thermal Field ◽  
Narrow Range ◽  
Critical Value ◽  
Critical Values ◽  
Parallel Motion ◽  
Field Temperature ◽  
The Right

Abstract We investigate the effects of field temperature T(f) on the entanglement harvesting between two uniformly accelerated detectors. For their parallel motion, the thermal nature of fields does not produce any entanglement, and therefore, the outcome is the same as the non-thermal situation. On the contrary, T(f) affects entanglement harvesting when the detectors are in anti-parallel motion, i.e., when detectors A and B are in the right and left Rindler wedges, respectively. While for T(f) = 0 entanglement harvesting is possible for all values of A’s acceleration aA, in the presence of temperature, it is possible only within a narrow range of aA. In (1 + 1) dimensions, the range starts from specific values and extends to infinity, and as we increase T(f), the minimum required value of aA for entanglement harvesting increases. Moreover, above a critical value aA = ac harvesting increases as we increase T(f), which is just opposite to the accelerations below it. There are several critical values in (1 + 3) dimensions when they are in different accelerations. Contrary to the single range in (1 + 1) dimensions, here harvesting is possible within several discrete ranges of aA. Interestingly, for equal accelerations, one has a single critical point, with nature quite similar to (1 + 1) dimensional results. We also discuss the dependence of mutual information among these detectors on aA and T(f).

scholarly journals The role of kinship in knowledge about medicinal plants: evidence for context-dependent model-based biases in cultural transmission?

2019 ◽  
Vol 33 (2) ◽  
pp. 370-375 ◽  
Author(s):  
Camilla de Carvalho de Brito ◽  
Washington Soares Ferreira-Júnior ◽  
Ulysses Paulino Albuquerque ◽  
Marcelo Alves Ramos ◽  
Taline Cristina da Silva ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Cultural Transmission ◽  
Model Based ◽  
Dependent Model ◽  
Context Dependent
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