How Insects Attract a Mate

If youve spent any time watching insects, youve probably stumbled on a pair of lady beetles or flies joined together in the throes of love. When youre a lone bug in a big world, finding a partner of the same species and the opposite sex is not always that simple. So how do insects find a mate? Love at First Sight—Visual Signals Some insects begin their search for a sexual partner by looking for or giving visual cues or signals. Butterflies, flies, odonates, and luminous beetles use visual signals most often. In some butterfly species, males spend much of the afternoon patrolling for receptive females. Anything that looks like a female may be inspected, especially if the object is a desired color and floats like a butterfly, to borrow a phrase from Muhammed Ali. Many species of flies perch in a place that provides a clear view of the area. The fly sits, watching for any flying object that might be a female. If one appears, he quickly takes flight and makes contact. If his quarry is indeed a female of his own species, he escorts her to an appropriate place for mating—perhaps a leaf or a twig nearby. Fireflies may be the most famous insects that flirt using visual signals. Here, the female sends the signal to lure a male. She flashes her light in a specific code that tells passing males her species, her sex, and that she is interested in mating. A male will reply with his own signal. Both male and female continue to flash their lights until they have found each other. Serenades of Love—Auditory Signals If youve heard the chirp of a cricket or the song of a cicada, youve listened to insects calling for a mate. Most insects that make sounds do so for the purpose of mating, and males tend to be the crooners in species that use auditory signals. Insects that sing for a partner include Orthopterans, Hemipterans, and Coleopterans. The best-known singing insects must be the male periodical cicadas. Hundreds or even thousands of male cicadas congregate in an area after emerging and produce an ear-splitting chorus of song. The cicada chorus usually includes three different species, singing together. Remarkably, the females respond to the song and are able to find mates of the same species from within the chaotic choir. Male crickets rub their forewings together to produce a raspy and loud song. Once he lures a female close to him, his song changes to a softer courtship call. Mole crickets, which are ground dwellers, actually construct special entrance tunnels shaped like megaphones, from which they amplify their calls. Some insects simply tap on a hard surface to produce their love calls. The death-watch beetle, for example, bangs his noggin against the roof of his tunnel to attract a mate. These beetles feed on old wood, and the sound of his head tapping resonates through the wood. Love Is in the Air—Chemical Cues French naturalist Jean-Henri Fabre discovered the power of the insect sex pheromones quite by accident in the 1870s. Male peacock moths came flitting in the open windows of his laboratory, landing on the mesh cage of a female. He tried to fool the males by moving her cage to different locations, but the males always found their way back to her. As you might suspect from their plumose antennae, male moths search for suitable female mates by sensing sex pheromones in the air. The female cecropia moth emits a scent so powerful it attracts males from miles around. A male bumble bee uses pheromones to lure a female to a perch, where he can mate with her. The male flies along, marking plants with his perfume. Once he sets his traps, he patrols his territory waiting for a female to land on one of his perches. Unmated Japanese beetle females release a strong sex attractant, which quickly draws the attention of many males. Sometimes, so many male suitors appear at one time that they form a crowded cluster referred to as a beetle ball.

American Literature Kate Chopin, and Mary Eleanor...

Over the years American Literature has become an important part of the American history. In the other hand, it is really important for people to study the significant of the American literature, because in particular is associated with influence of the American culture. People should know more about their culture, because it is the place where they are living in. Literature was brought to the United States from the European culture. The American literature started to develop during the antebellum era in the late 19th century and the 20th century. At this period of time many writers started to get well known in the American society. Good examples of two good antebellum era writers are Kate Chopin, and Mary Eleanor Wilkins Freeman. These two women made a big impact in the American history. Both of these women were very important writers, and well known for their American romance fiction short stories. Chopin’s and Freeman’s short stories were very interesting because they talked about real day by day events. People liked their short stories, because sometimes they identified their selves with the characters of the stories. Freeman and Chopin wrote several short stories while they were alive. There are several reasons why Kate Chopin and Mary E. Wilkins- Freeman affected the American literature and culture. The Antebellum era in the American history was best known the period before the civil war and after the War of 1812. During the first half of the 19th century, the

An Analysis of Ethics In the Workplace Free Essays

In the first article â€Å"What role should HR play in corporate ethics† the authors establish that HR is vital toward maintaining and building corporate ethics programs. In particular the researchers suggest that HR professionals can create programs that help facilitate open communication and enhance ethics by helping employees and management officials understand the effects non-ethical behavior may have on customers, shareholders and organizational productivity. The authors also suggest that ethics programs should be linked to all business units including finance, security and any legal organization components. We will write a custom essay sample on An Analysis of Ethics In the Workplace or any similar topic only for you Order Now An ethics program according to this author must cover multiple areas including risk assessment, organizational standards, communication, reporting and organizational assessment. I support the author’s views in this article. Ethics starts by opening the lines of communication within an organization. HR plays a key role in ethics development in an organization because HR professionals come to intimately understand the needs, wants and problems employees may have with ethical subjects. In the second article, â€Å"How HR can facilitate ethics† the authors suggest again that HR professionals must play an important role in developing, maintaining and updating ethics programs. This article like the previous article supports adopting ethical systems within the organization. A key element of ethics programs defined by the authors is also communications. The authors suggest that HR plays three critical roles with respect to ethics including determining employee’s loyalty, providing consistent information and assessing perceptions about ethical behaviors in an organization. Again the authors here make a valid point. HR is critical as the previous article mentions to the success of an organizational ethical program. I also believe that a solid ethics program will build loyalty but not just among employees. A company that has a reputable ethics program in place will also stand out among the competition. In an increasingly global marketplace it is vital that organizations take steps to ensure they conduct ethical business practices. Both of these articles are very relevant to the field of HRD. As companies continue to expand into an international marketplace, the media more and more is highlighting stories that feature unethical behavior. Such behavior tarnishes the reputation of companies and also harms employee’s chances for advancement and personal success. It is vital that human resource professionals take an active role in developing ethical systems within the organization. HR professionals are trained not only in ethical management but also to work with employees to form a bridge between managers and employees. HR professionals can help open the lines of communication, survey current employees and mangers to determine potential problems areas, and work with multiple business units synergistically to ensure all company objectives are met in as ethical a manner as possible. It’s not enough to simply â€Å"do† business. Companies that fail to uphold ethical standards will ultimately fail in the long term. It is important that companies not only remain competitive but take pride in ethical work practices. HRD teams should continually work to discover new and innovative techniques for building ethical work practices into organizational processes and procedures. Ethics is something that should be ingrained in the heart and soul of organizations. How to cite An Analysis of Ethics In the Workplace, Essay examples