Sexual size dimorphism and geographic variation in forearm length of Rafinesque’s Big-eared Bat (Corynorhinus rafinesquii) and Southeastern Myotis (Myotis austroriparius)

Sexual size dimorphism is common in many taxa and results from various pressures, including competition, reproductive requirements, functional differences, and sexual recognition. For mammals, males are typically the larger sex; however, for vespertilionid bats, females are more often the larger sex. Forearm length, a feature that influences overall wing and body size and is often sexually dimorphic, is a standard morphological measurement taken from bats. Forearm length was measured in two vesper bat species (Corynorhinus rafinesquii and Myotis austroriparius) that co-occur across much of the southeastern United States. Forearm length was greater in females of both species, and females of both species also exhibited regional variation in forearm length. By having a longer forearm and therefore being larger in size, females may be more maneuverable and better equipped to carry young. While this study did not directly investigate the mechanisms behind regional variation in forearm length, it is possible this is the result of variability in habitat types, resources, or thermodynamic constraints. Knowledge of sexually dimorphic characteristics is important for obtaining a general understanding of a species and its morphology.

Breve aproximación a la figura de Lilith en "Deseos"

In this paper, by analysing the novel Deseos by Marina Mayoral, we aim to address the dificulty that modern women suffer regarding her personal liberation as an active subject against the generic domain imposed by males. Her alienation, as an exercise supported by the beliefs of the ancient Mesopotamia, has given rise to the femme fatale, a reversal of utopian characteristics in different Western societies founded by the biblical patriarchy. Lilith's image, enhanced by the nineteenth century art by the Pre-Raphaelites, will be decisive in the process of sexual recognition that will lead the study of aspects such as the protest, uprooting, punishment and revenge.

Colouration in fishes

A large number of teleostean fishes is brightly and brilliantly coloured. Colouration is due to presence of chromatophores containing various kinds of pigment granules in their skin and scales. Colouration in fishes provides them power of adjustment with surrounding and also enables them to survive. Various factors like temperature, light, diet, stimuli, nervous and hormonal changes affect functioning of chromatophores, leading to colour coordination and dispersion. Colour pattern in fishes is used for concealment camouflage, communication, warning and sexual recognition, besides having taxonomic importance.

Coming Out Party

This chapter centers on one of the few moments when sexuality emerged as a particular topic of discussion, after an Australian tribune participant, Laurie Bebbington, identified herself as a lesbian feminist. Her intervention inspired lesbian participants at the NGO tribune to hold a series of forums on the importance of sexual recognition. Critics insisted on a zero-sum game in which a host of rights loosely related to sexuality—especially for lesbians, sex workers, and those seeking reproductive autonomy—were seen as coming at the expense of human rights and economic justice in the Third World. Some observers saw IWY as a Trojan horse that smuggled in unacceptable sexual freedoms.