Mating system

This review article describes how the mating decision of Drosophila fruit flies is dependent of first the male’s choice to mate and then the female’s choice to accept or reject the male. The article simplifies the mating by the neurobiology behind the male’s choice and then the female’s choice. Furthermore, the article describes how males rely on chemical signals to detect suitable courtship objects and distinguish female flies from males. According to the article, males courtship is based on pheromone detection which then elicits courtship singing. The neurobiology behind male pheromone detection and processing including how the chemical compound of the pheromone interacts with specific odorant receptors in the brain of male fruit flies is…

Eberhard. They use some of the behavioural anomalies in these species to look at how females affect paternity such as how females actively participate in creating copulatory plugs as well as physical clasping by the female rather than the male during copulation. They present evidence that female Leucage individuals have powerful effects on whether copulation will occur, when it will end, whether a mating plug will be formed and whether the male will survive the encounter arguing that several…

larger body size than that of males (Savalli & Fox, 1999). Despite their small size, males are known to have relatively large ejaculates, which act as a source of resources for their mates (Edvardsson, 2007). Although having access to these nutrients provided by their mates is of benefit to the females, it appears that living in the presence of males is costly to female C. maculatus health. Both females who were provided nutrients and those who were nutrient depleted had a shorter lifespan when…

the problems it is causing in Hawaii. The effects the Coquí has on Hawaii and in Puerto Rico are viewed differently and creating many conservational issues that has arisen in both places. The Coquí genus is “Eleutherodactylus, which in Greek means free toes. As the name indicates, this (genus) has no inter digital membrane, which could indicate that they are not adapted to swim. All Coquí’s have disks or pads on the tips of their toes, to help them adhere to surfaces, like moistened…

choosing a mate appeared and had no choice but to choose someone whom they could trust would bring food on the table and security to her and their offspring. Moore and Cassidy think that “female reproductive success is therefore constrained by access to the resources necessary to raise costly offspring.” In order to seek for a mate, Puts tells us that women were competing to be the most attractive ones because more physically attractive women demand greater male investment and other direct and…

Human mating is observed in almost every culture, leading us to the diverse world we live in today. This signifies our existence and should be important to us. To better understand this behavior, we can take a look at different explanations which shape human mating behavior. Researching this topic we can find evolutionary perspectives, which delve into topics, such as parental investment, survival, and sexual selection. There is also an opposition to these evolutionary ideas which suggest that…

the 10-5 dilution plated with antibiotic streptomycin did not produce any colonies, but the 10-5 dilution without streptomycin yielded 48 red colonies (Table I). The recipient strain with the the 10-5 dilution plated with streptomycin produced 41 white colonies and the conjugation mixture with the 10-4 dilution produced 12 red and 483 white colonies (Table I). The cell concentration of the donor strain calculated to be 4.8xcells/mL and for the recipient it was 4.1xcells/mL. The conjugation…

foundational studies and theories were established. These “schools of thought” were differentiated by support for either rational or natural systems as well as administrative practices. Central themes across the literature examined the primary differences between rational and natural systems and the selected schools of thought. Theories such as “Taylor’s Scientific Management”, “Fayol’s Administrative Theory”, “Weber’s Theory of Bureaucracy”, and “Simon’s Theory of Administration Behavior”…

They explain how the activity system define a group of people who share a common goal or motive. I completely agree on how an activity system allow certain communities are structurally connected. This is a great way to help you understand community relationships. Activity system is a good system because it “sees all aspects of activity as shaped over time by people’s social interactions with each other and the tools they use” (1). Everyone is in an activity system even if you don’t realize it.…

How Shake Shingle Metal Roofing Compares To Wood Shakes If you love the look of a wood shake roof but hate the thought of all the maintenance a wood roof needs, then you should consider getting a shake shingle metal roof instead. You'll have the look you like, but none of the upkeep required for real wood. Here's how the two types of roofing compare. Appearance You may imagine metal roofing to be in long sheets like you see on barns, but it actually comes in different forms. The metal can be…