scholarly journals Maternal effects on reproduction in the precocial European hare (Lepus europaeus)

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247174
Author(s):  
Stéphanie C. Schai-Braun ◽  
Peter Steiger ◽  
Thomas Ruf ◽  
Walter Arnold ◽  
Klaus Hackländer

In female mammals, reproduction, and in particular lactation, is the energetically most exigent life-history phase. Reproduction is strongly controlled by body reserves and food availability, so females with better body condition or food supply are believed to have higher reproductive output. Additionally, the growth and mortality of young mammals depends on their postnatal development. Therefore, the degree of precociality affects energetic demands for both mothers and young. To study the reproductive performance of the precocial European hare (Lepus europaeus), we analysed relationships between six predictor variables describing maternal and environmental effects and nine response variables relating to reproduction from 217 captive females. We compared the data with those of precocial and altricial mammal species from an extensive literature search. For hares, we found: (1) Heavier females had heavier litters at birth. (2) In summer and spring, total litter mass was larger than in winter. (3) At the end of lactation, the litters of multiparous females were heavier than those of primiparous females. (4) Both older females and females giving birth for the first time had relatively high leveret mortality during lactation. Comparing our results with the literature for other mammals revealed that the body condition (i.e., body mass) of females before birth is predictive of reproductive parameters in both precocial and altricial species. In the precocial hare, female body condition is no longer predictive of reproductive parameters at the end of lactation, whereas in altricial species, female body condition remains predictive of reproduction (litter mass at the end of lactation, offspring mortality) until the end of lactation. We conclude that these effects are caused by precocial offspring feeding on solid food soon after birth and, thus, being less dependent on the mother’s body condition during lactation than altricial offspring. In line with this, precociality might have evolved as a way of buffering offspring against maternal effects.

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 856
Author(s):  
Linas Balčiauskas ◽  
Laima Balčiauskienė

Scarcely investigated in terms of small mammals, kitchen gardens and homesteads form a subset of environments. Using results of snap trapping, we present the first data on small mammal species diversity, gender and age structure, relative abundance, body fitness, and reproduction parameters in these commensal habitats (kitchen gardens, homestead gardens, houses, and outbuildings). We expected that (i) house mice should be the dominant species in buildings, while striped field mice should be dominant in gardens, (ii) body condition should be the highest in buildings, (iii) body condition should increase in the autumn, irrespective of the habitat, and (iv) breeding failures in the form of disrupted pregnancies should be observed. Not all of the predictions were confirmed. From the seven recorded species, gardens and outbuildings were dominated by yellow-necked mice, while bank voles dominated in buildings where food was available. The number of recorded species and diversity index increased during the autumn months. The body condition was highest in rodents that were trapped in gardens. It decreased towards winter, with the exception of the striped field mouse. Breeding disturbances were recorded in all of the most numerous species, comprising 16.7–100% of all observed pregnancies.


2012 ◽  
Vol 102 (3) ◽  
pp. 303-310 ◽  
Author(s):  
Carlos B. Kasper ◽  
Vinícius A. G. Bastazini ◽  
José B. G. Soares ◽  
Thales R. O. de Freitas

Between January 2007 and December 2010, the abundance of medium-sized mammals was studied, with special focus on the Molina's hog-nosed skunk, Conepatus chinga (Molina, 1782), at four locations in southern Brazil. In this study, transect line methodology was used to obtain data for Distance Analyses. Transects were traveled by car at night, searching with spotlights along the edges of secondary roads in agricultural landscapes. Along 1,811 km, we obtained 620 observations of 20 mammal species. The most common species was the exotic European hare, Lepus europaeus (Pallas, 1778); the highest abundance estimated for South America was observed in one of the study areas, where its density was estimated as 32 individuals/km². Carnivores were the most commonly recorded mammals, represented by 10 species and comprising 51% of all observations. Molina's hog-nosed skunk occurred in all study areas, but occurred in sufficient numbers to obtain density estimates in only two of the areas. We estimated 1.4 to 3.8 individuals/km², in the first density estimate made by the transect method for a member of Conepatus in the Neotropics. These values are similar to those estimated for North American species of Mephitidae. In Brazil, C. chinga is apparently more abundant in the Pampa biome than in the grasslands of the Atlantic Forest. For two other carnivores, Lycalopex gymnocercus (Fisher, 1814) and Cerdocyon thous (Linnaeus, 1766), we estimated preliminary densities that were similar to those previously cited for different regions.


2017 ◽  
Vol 1 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Myrtill Gráff ◽  
Ágnes Süli ◽  
Szabina Szilágyi ◽  
Edit Mikó

Abstract The body condition scoring system (BCS) is a means of accurately determining body condition of dairy cows, independent of body weight and farm size. The body condition scores represent a subjective visual or tactile (or both) evaluation of the amount of subcutaneous fat in a cow. The system is a useful method of evaluating body energy reserves and is used widely for evaluating nutritional status in dairy cows. The different stages of lactation have different recommended scores. BCS change during the lactation period depends on the milk production, reproduction and health status. Extreme body condition loss in the early lactation can cause irregular heats, longer time to first ovulation, and fail to conceive. The aim of this research was to determine the effect of BCS on Holstein cows’ reproduction. The relationship between some BCS parameters: BCS at calving (BCSc), minimum BCS after calving (BCSmin) and the reduction of BCS after calving (BCSr) on one hand and three reproductive parameters: the days from calving to first service (DFS), number of inseminations to conception (NIC), and days open (DO) on the other hand were studied in three private dairy farms in South Hungary. BCS were determined monthly during milk recording. A total of 786 records of Holstein cows from 1 to 3 lactation were evaluated. DFS was significantly (P<5%) influenced by BCSs and BCSmin. The number of inseminations to conception (NIC) varied according to the individual cow. In the present study was between 1 and 12. The most favourable DO values were observed in the group having >3.5 BCSc (150.04 days), the group with 3.0-3.5 BCSmin (138.92) and the group having >1 BCSr. There was no significant relationship found between DO and the BCS groups.


2014 ◽  
Vol 45 (6) ◽  
pp. 495-497 ◽  
Author(s):  
Nicolas Guéguen

Nelson and Morrison (2005 , study 3) reported that men who feel hungry preferred heavier women. The present study replicates these results by using real photographs of women and examines the mediation effect of hunger scores. Men were solicited while entering or leaving a restaurant and asked to report their hunger on a 10-point scale. Afterwards, they were presented with three photographs of a woman in a bikini: One with a slim body type, one with a slender body type, and one with a slightly chubby body. The participants were asked to indicate their preference. Results showed that the participants entering the restaurant preferred the chubby body type more while satiated men preferred the thinner or slender body types. It was also found that the relation between experimental conditions and the choices of the body type was mediated by men’s hunger scores.


2013 ◽  
Vol 10 (2) ◽  
pp. 358-373
Author(s):  
Louise Wilks

The representation of rape continues to be one of the most highly charged issues in contemporary cinema, and whilst many discussions of this topic focus on Hollywood movies, sexual violation is also a pervasive topic in British cinema. This article examines the portrayal of a female's rape in the British feature My Brother Tom (2001), a powerful and often troubling text in which the sexual violation of the teenage female protagonist functions as a catalyst for the events that comprise the plot, as is often the case in rape narratives. The article provides an overview of some of the key feminist academic discussions and debates that cinematic depictions of rape have prompted, before closely analysing My Brother Tom's rape scene in relation to such discourses. The article argues that the rape scene is neither explicit nor sensationalised, and that by having the camera focus on Jessica's bewildered reactions, it positions the audience with her, and powerfully but discreetly portrays the grave nature of sexual abuse. The article then moves on to examine the portrayal of sexual violation in My Brother Tom as a whole, considering the cultural inscriptions etched on the female body within its account of rape, before concluding with a discussion of the film's depiction of Jessica's ensuing methods of bodily self-inscription as she attempts to disassociate her body from its sexual violation.


2020 ◽  
Vol 1 (2) ◽  
pp. 93-113
Author(s):  
Obert Bernard Mlambo ◽  

This article examined attitudes, knowledge, behavior and practices of men and society on Gender bias in sports. The paper examined how the African female body was made into an object of contest between African patriarchy and the colonial system and also shows how the battle for the female body eventually extended into the sporting field. It also explored the postcolonial period and the effects on Zimbabwean society of the colonial ideals of the Victorian culture of morality. The study focused on school sports and the participation of the girl child in sports such as netball, volleyball and football. Reference was made to other sports but emphasis was given to where women were affected. It is in this case where reference to the senior women soccer team was made to provide a case study for purposes of illustration. Selected rural community and urban schools were served as case references for ethnographic accounts which provided the qualitative data used in the analysis. In terms of methodology and theoretical framework, the paper adopted the political economy of the female body as an analytical viewing point in order to examine the body of the girl child and of women in action on the sporting field in Zimbabwe. In this context, the female body is viewed as deeply contested and as a medium that functions as a site for the redirection, profusion and transvaluation of gender ideals. Using the concept of embodiment, involving demeanor, body shape and perceptions of the female body in its social context, the paper attempted to establish a connection between gender ideologies and embodied practice. The results of the study showed the prevalence of condescending attitudes towards girls and women participation in sports.


The paper provides an analysis of the structuralist and phenomenological traditions in interpretation of female body practices. The structuralist intellectual tradition bases its methodology on concepts from social anthropology and philosophy that see the body as ‘ordered’ by social institutions. Structuralist approaches within academic feminism are focused on critical study of the social regulation of female bodies with respect to reproduction and sexualisation (health and beauty practices). The author focuses on the dominant physical ideal of femininity and the means for body pedagogics that have been constructed by patriarchal authority. In contrast to theories of the ordered body, the phenomenological tradition is focused on the “lived” body, embodied experience, and the personal motivation and values attached to body practices. This tradition has been influenced by a variety of schools of thought including philosophical anthropology, phenomenology and action theories in sociology. Within academic feminism, there are at least three phenomenologically oriented strategies of interpretation of female body practices. The first one is centred around women’s individual situation and bodily socialization; the second one studies interrelation between body practices and the sense of the self; and the third one postulates the potential of body practices to destabilize the dominant ideals of femininity and thus provides a theoretical basis for feminist activism. The phenomenological tradition primarily analyses the motivational, symbolic and value-based components of body practices as they interact with women’s corporeality and sense of self. In general, both structuralist and phenomenological traditions complement each other by focusing on different levels of analysis of female embodiment.


2021 ◽  
pp. 1354067X2110040
Author(s):  
Josefine Dilling ◽  
Anders Petersen

In this article, we argue that certain behaviour connected to the attempt to attain contemporary female body ideals in Denmark can be understood as an act of achievement and, thus, as an embodiment of the culture of achievement, as it is characterised in Præstationssamfundet, written by the Danish sociologist Anders Petersen (2016) Hans Reitzels Forlag . Arguing from cultural psychological and sociological standpoints, this article examines how the human body functions as a mediational tool in different ways from which the individual communicates both moral and aesthetic sociocultural ideals and values. Complex processes of embodiment, we argue, can be described with different levels of internalisation, externalisation and materialisation, where the body functions as a central mediator. Analysing the findings from a qualitative experimental study on contemporary body ideals carried out by the Danish psychologists Josefine Dilling and Maja Trillingsgaard, this article seeks to anchor such theoretical claims in central empirical findings. The main conclusions from the study are used to structure the article and build arguments on how expectations and ideals expressed in an achievement society become embodied.


Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1414
Author(s):  
Ramūnas Antanaitis ◽  
Vida Juozaitienė ◽  
Dovilė Malašauskienė ◽  
Mindaugas Televičius ◽  
Mingaudas Urbutis ◽  
...  

The aim of the current study was to evaluate the relation of automatically determined body condition score (BCS) and inline biomarkers such as β-hydroxybutyrate (BHB), milk yield (MY), lactate dehydrogenase (LDH), and progesterone (mP4) with the pregnancy success of cows. The cows (n = 281) had 2.1 ± 0.1. lactations on average, were 151.6 ± 0.06 days postpartum, and were once tested with “Easy scan” ultrasound (IMV imaging, Scotland) at 30–35 d post-insemination. According to their reproductive status, cows were grouped into two groups: non-pregnant (n = 194 or 69.0% of cows) and pregnant (n = 87 or 31.0% of cows). Data concerning their BCS, mP4, MY, BHB, and LDH were collected each day from the day of insemination for 7 days. The BCS was collected with body condition score camera (DeLaval Inc., Tumba, Sweden); mP4, MY, BHB, and LDH were collected with the fully automated real-time analyzer Herd Navigator™ (Lattec I/S, Hillerød, Denmark) in combination with a DeLaval milking robot (DeLaval Inc., Tumba, Sweden). Of all the biomarkers, three differences between groups were significant. The body condition score (BCS) of the pregnant cows was higher (+0.49 score), the milk yield (MY) was lower (−4.36 kg), and milk progesterone in pregnant cows was (+6.11 ng/mL) higher compared to the group of non-pregnant cows (p < 0.001). The pregnancy status of the cows was associated with their BCS assessment (p < 0.001). We estimated that cows with BCS > 3.2 were 22 times more likely to have reproductive success than cows with BCS ≤ 3.2.


The Auk ◽  
2006 ◽  
Vol 123 (2) ◽  
pp. 405-418 ◽  
Author(s):  
Jón Einar Jónsson ◽  
Alan D. Afton ◽  
Ray T. Alisauskas ◽  
Cynthia K. Bluhm ◽  
Mohamed E. El Halawani

AbstractWe investigated effects of ecological and physiological factors on brood patch area and prolactin levels in free-ranging Lesser Snow Geese (Chen caerulescens caerulescens; hereafter “Snow Geese”) and Ross's Geese (C. rossii). On the basis of the body-size hypothesis, we predicted that the relationships between prolactin levels, brood patch area, and body condition would be stronger in Ross's Geese than in the larger Snow Geese. We found that brood patch area was positively related to clutch volume and inversely related to prolactin levels in Ross's Geese, but not in Snow Geese. Nest size, nest habitat, and first egg date did not affect brood patch area in either species. Prolactin levels increased as incubation progressed in female Snow Geese, but this relationship was not significant in Ross's Geese. Prolactin levels and body condition (as indexed by size-adjusted body mass) were inversely related in Ross's Geese, but not in Snow Geese. Our findings are consistent with the prediction that relationships between prolactin levels, brood patch area, and body condition are relatively stronger in Ross's Geese, because they mobilize endogenous reserves at faster rates than Snow Geese.Factores Ecológicos y Fisiológicos que Afectan el Área del Parche de Incubación y los Niveles de Prolactina en Gansos Nidificantes del Ártico


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