The larvae of scarab beetles, known as "white grubs" and belonging to the genera Phyllophaga and Anomala (Coleoptera: Scarabaeidae), are regarded as soil-dwelling pests in Mexico. During a survey conducted to find pathogenic bacteria with the potential to control scarab larvae, a native Serratia sp. (strain Mor4.1) was isolated from a dead third-instar Phyllophaga blanchardi larva collected fro...

The lability of blood volume and its relationship to locomotor activity was investigated in two species of snakes Elaphe obsoleta, Say and Crotalus viridis, Rafinesque. Repetitive measurements of blood volume, determined from changes in the specific activity of circulating 51Cr-labelled erythrocytes, indicated that 15 min of locomotor activity reduced blood volume by 21% due to filtration of pl...

Production of nitric oxide (NO), an evolutionarily conserved, intercellular signaling molecule, appears to be required for the maintenance of the larval state in the gastropod mollusc Ilyanassa obsoleta. Pharmacological inactivation of endogenous nitric oxide synthase (NOS), the enzyme that generates NO, can trigger metamorphosis in physiologically competent larvae of this species. Neuropils in...

The intensity of small-scale fluid motions varies among coastal seascapes, which could drive species-specific behavioral adaptations in planktonic larvae. For example, inlets and estuaries typically have stronger turbulence weaker surface gravity waves than the continental shelf. In Mid-Atlantic Bight, eastern mudsnails (Ilyanassa obsoleta) inhabit estuaries, whereas threeline trivittata) two s...

En un contexto en el que la llegada de COVID-19 ha supuesto reto educativo: enseñanza a distancia, es necesario valorar si decisión adaptar situación entorno online una oportunidad para dejar atrás educación obsoleta y utilización las TIC como medio finalmente va conseguir consolidarse, siendo importante conocer también esta adaptación factor estresante los docentes día otro han tenido modifica...

Imposex, the development of male sex characteristics by female gonochoristic snails, has been documented globally and is causally associated with exposure to the ubiquitous environmental contaminant tributyltin (TBT). Elevated testosterone levels in snails also are associated with TBT, and direct exposure to testosterone has been shown to cause imposex. We discovered previously that the mud sna...

New records of 38 species of the Conopid genera Paramyopa Kröber, 1916a, Pseudoconops Camras, 1962b, Stylogaster Macquart, 1835, Thecophora Rondani, 1845, and Zodion Latreille, 1797 are presented from the Afrotropical Region. Stylogaster angolensis spec. nov. (Angola), Stylogaster cryptica spec. nov. (Ethiopia), Stylogaster fianarantsoensis spec. nov. (Madagascar), Stylogaster ivindoensis spec....

Resumen En muchos aspectos, los juegos de ordenador desarrollados durante la década de los 80 son una parte fundamental de la historia de los juegos modernos, ya que establecieron las bases de lo que actualmente entendemos por entretenimiento electrónico. Sin embargo, la tecnoloǵıa utilizada para esos juegos se han vuelto obsoleta. A pesar de ello, cuando se juega de nuevo a unos de estos clási...

Drought can have severe ecological effects and global climate-change theory predicts that droughts are likely to increase in frequency and severity. Therefore, it is important that we broaden our understanding of how drought affects not only individual species, but also multitrophic interactions. Here we document vegetation and small-mammal abundance and associated patterns of Texas ratsnake (E...

The lability of blood volume and its relationship to locomotor activity was investigated in two species of snakes Elaphe obsoleta, Say and Crotalus viridis, Rafinesque. Repetitive measurements of blood volume, determined from changes in the specific activity of circulating Cr-labelled erythrocytes, indicated that 15 min of locomotor activity reduced blood volume by 21 % due to filtration of pla...