Citation: Lin C-Y, Tsai Y-C and Chiao C-C (2017) Quantitative Analysis of Dynamic Body Patterning Reveals the Grammar of Visual Signals during the Reproductive Behavior of the Oval Squid Sepioteuthis lessoniana. Front. Ecol. Evol. 5:30. doi: 10.3389/fevo.2017.00030 Quantitative Analysis of Dynamic Body Patterning Reveals the Grammar of Visual Signals during the Reproductive Behavior of the Oval...

Mating changes female reproductive behavior in profound ways. In Drosophila, the trigger for this behavioral switch is a small peptide called sex peptide (SP), which is transferred with the male seminal fluid during insemination. Two papers in this issue of Neuron (Häsemayer et al. and Yang et al.) show that SP inhibits a small set of internal sensory neurons in the female genital tract. These ...

The extensive Early Jurassic continental strata of southern Africa have yielded an exceptional record of dinosaurs that includes scores of partial to complete skeletons of the sauropodomorph Massospondylus, ranging from embryos to large adults. In 1976 an incomplete egg clutch including in ovo embryos of this dinosaur, the oldest known example in the fossil record, was collected from a road-cut...

Since the discovery of gonadotropin-releasing hormone (GnRH) in mammals at the beginning of the 1970s, it was generally accepted that GnRH is the only hypothalamic neuropeptide regulating gonadotropin release in mammals and other vertebrates. In 2000, however, gonadotropin-inhibitory hormone (GnIH), a novel hypothalamic neuropeptide that actively inhibits gonadotropin release, was discovered in...

Cheaters are a threat to every society and therefore societies have established rules to punish these individuals in order to stabilize their social system. Recent models and observations suggest that enforcement of reproductive altruism (policing) in hymenopteran insect societies is a major force in maintaining high levels of cooperation. In order to be able to enforce altruism, reproductive c...

Reproduction is energetically expensive for both sexes, but the magnitude of expenditure and its relationship to reproductive success differ fundamentally between males and females. Males allocate relatively little to gamete production and, thus, can reproduce successfully with only minor energy investment. In contrast, females of many species experience high fecundity-independent costs of repr...

Ablation of the telencephalic hemispheres blocked reproductive behavior and decreased the rate of operant responding for conspecific visual reinforcement. Repeated administration of operant conditioning sessions for 4 weeks following the ablation resulted in a partial recovery of the operant rate but not of reproductive behavior. Social isolation, which increases reactivity in Macropodus, had n...

SINGH and HALE ( 1 990) propose that differences in mating preference and mating speed of Drosophila pseudoobscura females from Bogota and California may explain the frequency changes of mitochondrial DNA (mtDNA) haplotypes that we (MACRAE and ANDERSON 1988) observed in population cages. In the course of considering various aspects of mating behavior as possible causes for the frequency changes...

BACKGROUND The fertility behavior of Iranian women and their reproductive needs is changing and consequently, for providing good services, it is critical to monitor their reproductive behavior at a national level.  METHODS This study was carried out by Avicenna Research Institute in the urban and rural parts of Iran between 2010 and 2011. Using cluster sampling, the reproductive history of 17...

This study examines female reproductive development from an evolutionary life history perspective. Retrospective data are for 10,847 U.S. women. Results indicate that timing of parental separation is associated with reproductive development and is not confounded with socioeconomic variables or phenotypic correlations with mothers’ reproductive behavior. Divorce/separation between birth and 5 ye...