Mate choice in a changing world

Human activities by altering environmental conditions are influencing the mate choice of animals. This is by impacts on: (i) the production and expression of traits evaluated by mate choosers; (ii) the transmission of information about potential mates to choosers; (iii) the reception and processing of the information by choosers; and (iv) the final mate choice. Here, I first discuss how these four stages of the mate-choice process can be altered by environmental change, and how these alterations, in turn, can influence individuals, populations, and communities. Much evidence exists for human-induced environmental changes influencing mate choice, but the consequences for the fitness of courters and choosers are less well known, and even less is known about the impact on population dynamics, species interactions and community composition. More evidence exists for altered mate-choice systems influencing interspecific matings and thereby community composition and biodiversity. I then consider whether plastic adjustments and evolutionary changes can rescue adaptive mate-choice systems, and reflect on the possibility of non-adaptive mate-choice systems becoming less maladaptive under environmental change. Much evidence exists for plastic adjustments of mate-choice systems, but whether these are adaptive is seldom known, as is the contribution of genetic changes. Finally, I contemplate the possibility of mate-choice systems rescuing populations from decline in changing environments. I explain how this is context dependent with both positive and negative outcomes possible. In summary, while much evidence exists for human-induced environmental changes influencing mate-choice systems, less is known about the consequences for ecological and evolutionary processes. Considering the importance that mate choice plays in determining individual fitness and population viability, the effects of environmental change on mate-choice systems should be considered in studies on the ecological and evolutionary consequences of human disturbances to habitats.Peer reviewe

Why study intraspecific variation: a comment on Harding et al.

Non peer reviewe

Parents' views on the impact Covid-19 has had on young children’s physical activity

The aim of this study is to examine parents' beliefs on what impact Covid-19 has had on our young children's physical activity. With the term young children, I refer to children aged from one to six years old. The research questions for this study are the following: 1. How do parents view the impact Covid-19 has had on children's physical activity? 2. What kind of change in the child’s physical activity can be seen? 3. Is there a change in the child’s attitude towards physical activity? In the chapter physical activity some background on how children master physical movements will be presented. The chapter contains children’s physical development, as well as benefits and the needs for physical activity. Physical development and physical activity go hand in hand, developing physically often leads to the child becoming more physically active. In the chapter Covid-19 and everyday life, viewpoints on how the Covid-19 pandemic has affected young children’s everyday life and especially physical activity are examined. The Covid-19 pandemic led to activities organized for families with children, such as story-time in library, music-play at the library/church and family café etc. stopped to decrease the spreading of the Covid-19 virus. A short complete lockdown took place in the beginning of spring 2020, where early childhood centers closed, and only parents/guardians who could not stay at home with their children had the right to bring their child to early childhood education. The parents that had the opportunity to stay home with their child were offered online early childhood education via the early childhood education center that they normally attend to. How much activities were sent out depended on the early childhood centers approach and beliefs (Hilppö, et al. 2020; Nurhonen et al. 2021). However, it was decided later that early childhood education centers remained open during the pandemic, and children were offered everyday life as normal as possible. Even though, early childhood education centers opened, the Covid-19 restrictions still existed (Nurhonen et al. 2021). How these restrictions were followed depended on the family. With the use of questionnaire, that were sent out to early childhood education centers and parent-child activities I have tried to get a view on how parents view the impact Covid-19 has had on young children’s physical activity. Has the pandemic affected young children’s physical activity? What are the parents’ beliefs? and how well with Covid-19 going on can children be physically active? I collected 103 answers from the questionnaire. Looking at the collected data I have also tried to see how and what attitudes towards physical activity children have. Do they enjoy being outdoors, physically active and has this changed during the pandemic? What can be concluded from this study is that even though the Covid-19 pandemic has been going on for 2 years it has not, according to the parents of the children, affected young children's physical activity that markedly. The children of this study seem to be as physically active as before the Covid-19 pandemic. This study is only a sample of a specific number of people, trying to explain how Covid-19 has affected the daily lives of children. Further study is needed to fully understand the changes made by Covid-19

The threespine stickleback (Gasterosteus aculeatus) as a modifier of ecological disturbances

Peer reviewe

Age-dependent relationships between multiple sexual pigments and condition in males and females

The reliability of sexual signaling may change across age classes due to shifts in resource allocation patterns. Two contrasting hypotheses exist regarding how the condition dependence of ornaments may shift with age, and both have received empirical support. On one hand, ornaments may more reliably reflect condition and quality in older individuals, because younger individuals of high quality invest in survival over signaling effort. On the other hand, the condition dependence of ornaments may decline with age, if older individuals in poor condition terminally invest in ornaments, or if resource constraints decline with age. Further, the expression and condition dependence of different ornaments may shift with age in unique ways, such that multifaceted sexual displays maintain reliable signaling across age classes. In yellow warblers (Setophaga petechia) of both sexes, we assessed how relationships between carotenoid-and phaeomelanin-based sexual pigmentation, prenesting body reserves, and condition at molt (reflected by growth bars and feather quality) vary across age classes. Melanin coverage correlated with condition at molt across age classes in males and showed high repeatability in both sexes. In contrast, carotenoid saturation increased longitudinally with age in males and correlated with condition at molt in different age classes in the 2 sexes. Specifically, carotenoid saturation correlated positively with condition at molt in younger, but not older males, whereas in females, the situation was reversed, with a positive correlation present only in older females. Results suggest that age-dependent signaling may promote maintenance of multifaceted sexual displays and that agedependent signaling dynamics depend on sex. © The Author 2013. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. All rights reserved

The Last Apache Broncho : The Apache Outlaw in the Popular Imagination, 1886-2013

This study examines the American mythmaking of late-nineteenth- and early-twentieth-century Apache \u27renegades\u27 and their post—Apache Wars counterpart the Apache \u27bronchos\u27 in popular culture and memory. The idea of the \u27broncho\u27 Apache created fear, insecurity, and cautionary folklore for residents of the American Southwest and northern Mexico from 1886—1930s. Over time, white appropriations of Apaches in literature, film, and pop culture would evolve from the murderous wild \u27savage,\u27 to the sympathetic anti-hero, to the hero. This thesis connects representations of Apaches with contemporaneous American attitudes on race, masculinity, nostalgia. Although portrayals of Apaches changed over time, an underlying theme of the American white male\u27s gender and racial superiority remained in place—reinforcing images of manhood in the mythic West and failing to accurately depict historic Apache individuals and historical events. The study, broken into three chapters, focuses on several mediums and aspects of Apache renegade/broncho mythologization. The first chapter largely centers on Massai, a historical Apache \u27broncho,\u27 and newspaper, military, and first-hand white and Apache accounts from the \u27broncho period. The second analyzes representations of Apaches in film and literature. And the third surveys the historiography of Apache \u27renegades

Reproductive isolation between two populations of Aglaoctenus lagotis , a funnel-web wolf spider

Aglaoctenus lagotis (Lycosidae: Sosippinae) is a spider that, in contrast to the predominant wandering habit of the family, constructs funnel webs. The species is widely distributed throughout the Neotropics and is credited with high levels of intraspecific variation. Here, we evaluate whether reproductive isolating barriers operate between some populations of A. lagotis. We used heterotypic encounters between individuals from two distant localities: southern Uruguay (SU) and Central Argentina (CA). Additionally, we used spiders from an ntermediate locality, western Uruguay (WU), where both forms of the species overlap (SU.WU was used to describe individuals from WU reminiscent of those from SU; and CA.WU was used to describe individuals from WU reminiscent of those from CA). No copulations occurred between SU and CA individuals, whereas a single and atypical copulation occurred between SU.WU and CA.WU individuals. Attacks (only by females on males) were rare. In tests of choice based on silk cues, SU males did not prefer homotypic cues but almost did not court CA females, whereas CA males preferred homotypic cues but usually courted heterotypic females. These findings, with a previously reported temporal asynchrony between populations, suggest the occurrence of reproductive isolation between both spider forms and a speciation process favoured by the wide distribution and plasticity of the species.Fil: González Pérez, María de la Macarena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Animal I; ArgentinaFil: Peretti, Alfredo Vicente. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Animal I; ArgentinaFil: Costa, Fernando G.. Instituto de Investigaciones Biológicas "Clemente Estable"; Urugua

Linking animal behavior to ecosystem change in disturbed environments

Peer reviewe

Do algae blooms dilute the risk of trematode infections in threespine sticklebacks?

Human-induced growth of macro-algae is often assumed to increase trematode infections in fishes by increasing the abundance and condition of the parasite’s intermediate host – snails – as this can boost the release of trematode larvae, cercariae, from the intermediate hosts. However, macro-algae can also impose barriers to the transmission of cercariae and reduce infections. We investigated whether an increased growth of filamentous algae affects the transmission of Diplostomum pseudospathaceum cercariae to the threespine stickleback Gasterosteus aculeatus, a common fish in eutrophied shallow waters. We exposed sticklebacks to trematode cercariae in the absence and presence of artificial filamentous algae, and recorded effects on the proportion of sticklebacks infected and the number of encysted metacercariae per fish. No significant effect of artificial algae on cercariae transmission was detected. However, the body size and the sex of the sticklebacks were strongly correlated with the number of encysted metacercariae per infected fish, with females and larger individuals being more infected. We discuss different factors that could have caused the difference in parasite transmission, including sex-related differences in body size and behaviour of sticklebacks.Peer reviewe