Flesh Fly (Sarcophagidae) Insect Dissection

Flesh Fly (Sarcophagidae) Insect Dissection Insect Physiology Lab Report of Insect Dissection (Reproductive System) Flesh Fly (Sarcophagidae) Abdirizak Nur Roble Introduction Flesh fly belongs to the family of Sarcophagidae, and the name is a  Greek word that consist of two word which are:  sarco means  flesh and phage  means eating and commonly known as flesh flies. They differ from most flies in that they are  ovoviviparous (their eggs hatch at the moments that they are expelled), and they opportunistically deposit a maggots on  carrion (meat), dung, decaying material, or open wounds of mammals, hence getting their common name (Marshall, 2012). Some flesh fly larvae are internal  parasites  of other insects such as  Orthoptera, and some, in particular the Miltogramminae, are  kleptoparasites  of solitary  Hymenoptera; although most of the more 3000 world species of Sarcophagidae probably develop om invertebrate tissue as scavengers, predators, parasitoids or kleptoparasites (Marshall, 2012) . The flesh fly, (Sarcophagidae: Diptera) is an important ectoparasite as it causes myiasis in human and other mammals (Dutto and Bertero, 2010). It has become a great concern in many parts in the world such as Bangladesh as it is a serious agent affecting human health, livestock, fish and other animal food processing factories. The maggots of this species take their nourishment from unprotected fish and meat, thus contaminate them and reducing their nutritional value (Majumder at al. 2014). The adults of most genera are easily recognizable by the gray thorax possessing longitudinal black stripes (Fig. 1). Some members of this diverse genus are significant parasitoids of locusts as well as cicadas while other have the ability to locate their hosts by sound. It can be found in everywhere in the world, even in city parks and backyards, where some breed abundantly in mundane debris (Marshall, 2012). Sarcophagids are a very useful tool for the forensic entomologist, like many other insects, they can be used to estimate the time of the death of the person (Nishida 1984, Oliveira-Costa and Mello-Patiu 2004). Weather conditions and geographic location are key factors to consider when using insect evidence to estimate the time death time of a corpse as the variation associated with time of colonization after death is not completely understood at this time (Catts 1992). The reproductive organs of insects show an incredible variety of forms, but there is a basic design and function to each component so that even the most unusual reproductive system can be understood in terms of a generalized plan. Individual components of the reproductive system can vary in shape, position and number for example, the number of ovarian or testicular tubes, or sperm storage organs so on; are different between the insect groups, and sometimes even between different species within a genus. Knowledge of the homology of the components assists in interpreting structure and function in different insects (Gullan and Cranston 2014). The General male reproductive system is shown in the below picture (Fig: 2). It is important to note here that variation among insect reproductive systems is great since they are the most diverse organism that live in our world. Even closely related species are often isolated from one another through small variations in the morphology of reproductive organs which prohibits interspecies mating and to keep each species his existence. However, a generalized system can be constructed that closely represents all reproductive systems insects. Sometimes it’s very difficult to see the reproductive systems of the insect we dissected and we do not want to be alarmed if you we are unable to locate the structures on your dissected specimens. We need to be familiar with differences in male and female genitalia and be able to identify structures when given a diagram. The best approach to understand the insect reproductive systems and the insect internal morphology in general is to preform insect dissection; in this way one can see clearly if he/she follows the corre ct procedures to form the dissection. Objectives The main objective of this lab work was to locate and identify structures associated with the reproductive morphology of the insect as well as to understand and explain the functions of specific structures associated with the insect reproductive systems. Material and Methods The male adult fly was captured from Ongku Omra college area and the flesh fly was kept alive in the Center of Insect Systematic Center (CIS) in the Faculty of Science and Technology at UKM until the dissection time. The insect were killed with an alcohol which the concentration was 70%. After the insect died the legs and the wings were removed but the rest of the insect were kept in order to assist the dissection process (the head and the thorax were pinned to give some stability during the abdomen openings). After the abdomen was opened under stereoscopic microscope, the thorax and the head were removed. The reproductive system was removed out by using very fine forceps and some pining needles. The reproductive organ were cleaned up and was placed in clean petri-dish. The different components of reproductive system were photographed and the observation of the structure of the reproductive system was started. Result and discussion The adult male shows a pair of elongated and brown colored testes one on each side of the abdomen laying just below the alimentary canal (Fig. 3). The vasa deferentia was whitish paired canal which starts from the end of testis and these vasa transportspermfrom the epididymis  to the  ejaculatory ducts. The ejaculatory duct was a long and narrow tube which led to the ejaculatory sac formed by the union of two vasa deferentia. The ejaculatory duct color was light to creamy and it was in spiral shape.  ­Ã‚ ­Ã‚ ­ The testes were cylindrical in shape and dark brownish in color and the vasa deferentia was relatively short and ejaculatory duct was long as Keucheniusv (1913) discriped in mosquitoes (Culex). The vasa deferentia were generally short and became wavy to form a common ejaculatory duct. There was a soft tube-shaped and whitish twisted accessory gland which located at the frontal end of the ejaculatory duct just behind the vas deferens. Eshcherich (1894) reported that there was pairs of tubular type accessory glands in the male genital system of Musca and Tabanus. Also Keuchenius reported that in Culex. In the current dissection of the flesh fly the accessory glands are almost similar to that in Musca and Tabanus. The base part of the ejaculatory duct showed a muscular sacà ¢Ã¢â€š ¬Ã‚ like structure known as ejaculatory sac, located before the aedeagus. Hewit (1912) reported the ejaculatory sac in Musca and Keuchenius (1913) also confirmed the existence of ejaculatory sac in many Dipteran species. The flesh fly dissection showed the occurrence of a small muscular sacà ¢Ã¢â€š ¬Ã‚ like which located behind the male genitalia. The end part of the ejaculatory duct was enclosed and it forms the male aedeagus. After the insect was dissected and the reproductive system was removed from the rest of the body and it has been drawn and the (Fig: 4) below indicates the reproductive system that was observed under microscope of the flesh fly.  ­Ã‚ ­Ã‚ ­ The dissected insect had the same structures and features of Boettcherisca peregrina (Diptera : Sarcophagidae) that was dissected by Majumder (2014) and the picture below (Fig: 5) shows the similarity of the two reproductive systems. In conclusion carrying out an insect dissection experiment will enhance one’s knowledge of the insect’s internal morphology as well as identify and learning about the different parts that associated. It will also give opportunity to understand the functions of specific structures that are associated with the insect reproductive systems. References Capinera, J. L. 2008. Encyclopedia of Entomology. Springer. Catts, E. 1992. Problems in Estimating the Postmortem Interval in Death Investigations. Journal of Agricultural Entomology 9(4): 245-255. Dutto, M. Bertero, M. 2010. Traumatic Myiasis from Sarcophaga (Bercaea) Cruentata Meigen, 1826 (Diptera, Sarcophagidae) in a Hospital Environment: Reporting of a Clinical Case Following Polytrauma. J Prev Med Hyg 51(1): 50-52. Eshcherich, K. 1894. Anatomische Studien uber das mannlche Genital system der Coleopteran. Z.Wiss. Zool. 57: 620à ¢Ã¢â€š ¬Ã‚ 641. Gullan, P. J. Cranston, P. S. 2014. The Insects: An Outline of Entomology. John Wiley Sons. Hewitt, C. G. 1912. Fannia (Homalomyia) canicularis. Linn. and F scalaris Fab. Paraisitol. 5:161  174. Keuchenius, P.E. 1913. The structure of the internal genitalia of sonic male Diptera. Z. Wiss. Zool.105: 50là ¢Ã¢â€š ¬Ã‚ 536. Majumder, M. Z. R., Dash, M. K., Khan, H. R. Khan, R. A. 2014. The Reproductive Biology of Flesh Fly, Boettcherisca Peregrina (Robineauà ¢Ã¢â€š ¬Ã‚ Desvoidy, 1830)(Diptera: Sarcophagidae). Dhaka University Journal of Biological Sciences 23(1): 61-67. Marshall, S. A. 2012. Flies: The Natural History and Diversity of Diptera. Firefly Books Buffalo, NY. Nishida, K. 1984. [Experimental Studies on the Estimation of Postmortem Intervals by Means of Fly Larvae Infesting Human Cadavers]. Nihon hoigaku zasshi= The Japanese journal of legal medicine 38(1): 24-41. Oliveira-Costa, J. De Mello-Patiu, C. A. 2004. Application of Forensic Entomology to Estimate of the Postmortem Interval (Pmi) in Homicide Investigations by the Rio De Janeiro Police Department in Brazil. Emergence 234(3978): 165.175.

Fighting for Hunger

In this topic, we will see how Filipinos fighting for their hunger. We can see that there are so many people who starve to death, and the government didn't do anything about this problem. I hate how the government didn't do anything to solve this problem. There are many Filipinos who begging for food for them to live. My opinion here is we should help the others, if we help the others we can save a life. Starvation is not a joke we we're talking about million lives here. The government should take an action to this issue. There are so many cases that people die because of the hunger or starvation, they die because they can't do anything to stop their hunger, they just wait for someone to give them a food. So my opinion here is let's stop this problem now let's push the government to do something in this problem. If they can't do anything then let's encourage other people to help the people who's in need. If the government can't help them, I guess it's time to help the other people for them to have a longer life. The main problem here is the government didn't do anything to solve this problem. Many Filipinos died because of hunger or you can call it starvation. The rate of starvation in our country is increasing every year and every year the number of deaths in our country is increasing as well, it is all because of the starvation. I guess we are all aware that our country is rich in street people or you can call it as a homeless people, they are the one who experienced this problem, they can't do anything because they don't have any job or any money to buy their foods. We can help the by giving them a food or at least a small amount of money. In this way, we can help the others in a simple way. The problem here is why the government didn't do anything to solve this problem, they didn't do anything to save the others life. The fact that the government didn't do anything, we should help the one who's in need. If we have extra food or extra money we should give it to the people who can't afford to buy foods. We can always start a feeding program for the hungry people. I think there are many feeding program in our country.In this way we can help others, we can save the others by giving them a food or a money. There are many ways to help the people who's in need. If the government can't take any action to this then I guess it's time for us to make a move. We can help by starting a feeding program, giving a small amount of food and money to the people who's in need. We can help others in a small way if we want to I think it's time to help and care for the other people. Always remember that sharing is caring.

Othello, By William Shakespeare - 1454 Words

William Shakespeare wrote Othello during a time of great racial tension in England. In the drama, he introduces Othello, a military general who works for the state of Venice but is by origin a Moor (a black Arab). This gives him the unique position of being one of the most important men in Venice, while simultaneously being seen as an outsider. In writing such a character for a seventeenth century English audience, the author is clearly attempting to send a message. This tension between human desire and the need for control, not only in politics but in intimate relationships, is an equalizing force among humans of different races, backgrounds, and societal status. Othello conveys a theme that all humans – even those considered outsiders, even those in powerful positions – are vulnerable to destruction through their own lusts, jealousies, and desires. While, Othello is written as a tragic character, it is important to note that the source of his tragedy was not his colo r or background, but his human weaknesses that were, in some measure, shared by all the characters. This paper will explore how human desires and weaknesses can bring about destruction, particularly when exploited by an ill-intentioned individual. Othello is introduced in the first act as the subject of a late-night argument between Iago, Othello’s standard bearer, and Rodrigo in the streets of Venice. The audience learns that Othello is a military general, and that Iago is his standard bearer. Rodrigo isShow MoreRelatedOthello, By William Shakespeare957 Words   |  4 Pagesinnocent person kills himself while not knowing the truth. The best example of that would be the play Othello by the great William Shakespeare. As little as a handkerchief could make a difference if it is a symbol for something. In the play Othello by Shakespeare, handkerchief is first introduced by Othello to his beautiful mistress, Desdemona, as a sign of their love. At the end of the play what gets Othello to take extreme measures by the location of the handkerchief. As the symbol of the handkerchiefRead MoreOthello, By William Shakespeare1599 Words   |  7 Pages William Shakespeare’s 16th century play Othello is a duplicitous and fraudulent tale set alternatingly between Venice in act 1, and the island of Cyprus thereafter. The play follows the scandalous marriage between protagonist Othello, a Christian moore and the general of the army of Venice, and Desdemona, a respected and intelligent woman who also happens to be the daughter of the Venetian Senator Brabantio. Shakespeare undoubtedly positions the marriage to be viewed as heroic and noble, despiteRead MoreOthello, By William Shakespeare1218 Words   |  5 PagesIn a historical time period where emphasis was shifting from religion to race and ethnicity, key indicators of differences that perpetuated into racial prejudice and racial ideologies are evident in Othello by William Shakespeare. Although racism was not fully formed at this moment in history, Othello can be interpreted as a representation and an exploration of this shift in ideology. In the past, before this change to ward racial differences, religion was the major segretory factor in signifyingRead MoreOthello, By William Shakespeare894 Words   |  4 Pagesthose that which occurred in Othello written by William Shakespeare. Throughout the play Othello, we see the struggles of a marriage that is not accepted by their society. Othello is a extremely cherished black general living in a primarily white community. The play begins with Othello secretly becoming married to a white woman named Desdemona. This reasons others who are white to become angry and excuse to dislike this black man further more than they already do. Othello is a downward spiral from loveRead MoreOthello by William Shakespeare790 Words   |  3 PagesThroughout Othello by William Shakespeare, Othello makes numerous poor decisions due to his jealousy. Hitting Desdemona, trusting Iago, and killing Desdemona are among a few of the poor decisions that he makes. The word jealous can be defined as feeling or showing suspicion of som eones unfaithfulness in a relationship. Othello feels suspicious of Desdemona’s and Cassio’s relationship because of the lies that Iago tells him. Many people try to tell Othello the truth but he only believes the wordsRead MoreOthello, By William Shakespeare1923 Words   |  8 Pagesdissatisfaction or complication is shown. Firstly in Othello love is presented as ephemeral and transient while atonement love is presented as unrequited and finally in cat on a hot tin roof love is presented as painful and troublesome due to unreciprocated feelings. The tragic plot of Othello hinges on the potential of the villain, Iago, to deceive other characters, above all Roderigo and Othello, through encouraging them to misinterpret what they see. Othello is prone to Iago s ploys seeing that he himselfRead MoreOthello, By William Shakespeare941 Words   |  4 Pageswas Williams Shakespeare’s play Othello which depicts the tragedy of Othello, a Morris Captain. What is different about Shakespeare play is that the tragic hero is the black Othello and the villain a white Iago. Therefore, Shakespeare depiction of Othello as a tragic character and Iago as a villain, challenges Elizabethan’s stereotypes regarding individuals of African descent. Shakespeare challenges the stereotypical â€Å"type –casting of the black man† in Elizabethan society by depicting Othello asRead MoreOthello, By William Shakespeare1152 Words   |  5 Pages‘Othello’ was a tragedy of incomprehension at the deepest level of human dealings as no one in the play came to an understanding of himself or any of the surrounding characters. The play ‘Othello’ by William Shakespeare focused on tragedy through the anguish of the main character ‘Othello’ which lead to the suffering and death of numerous characters including himself. Appearance Vs. Reality challenged human dealings within the play ‘Othello’ as no-one came to see anyone’s true self and no-one seesRead MoreOthello, By William Shakespeare1178 Words   |  5 Pagesprofitable in condition of good and immorality. Othello is presented as good and Iago as evil, but Iago and Othello’s relationship also shares a distrust of their wives. The overall logical argument is based on love, jealousy and betrayal between two lovers that ultimately leads to their separation because of Iago’s evil plan. I am using this article to agree with Berry s view on how Iago separates two lovers just so he can take retaliation on Othello by manipulating everyone to unmasking their trueRead MoreOthello, By William Shakespeare1140 Words   |  5 Pagesâ€Å"Othello† is a play written by William Shakespeare in 1603. In this play, Shakespeare features three major characters: Othello, Iago, and Desdemona. Othello, a black man, and Desdemona, a white venetian secretly eloped in the play. Iago shows racism and prejudice towards their relationship because of their skin colors. In the play, Iago says: â€Å"Even now, now, very now, an old black ram is tupping your white ewe. Arise, arise! Awake the snorting citizens with the bell, or else the devil will make a

Sexual Harassment and Rape in The Military - Free Essay Example

Sample details Pages: 2 Words: 665 Downloads: 3 Date added: 2019/02/20 Category Law Essay Level High school Tags: Sexual Assault In The Military Essay Did you like this example? Sexual Harassment and Rape Prevention (SHARP) program continues to record cases of sexual harassment and rape in the military. Bullying, coercion, and other incidences related to sexual favors are the main forms of abuse occurring in the army. However, the Department of Defense (DOD) cannot ascertain whether the rise in the reported cases of sexual harassment and abuse implies a practical increase in the vices (Hillman, 2009). Don’t waste time! Our writers will create an original "Sexual Harassment and Rape in The Military" essay for you Create order Given the intervention of the SHARP program, the military personnel are more aware of and sensitive to aspects of assaults with improved confidence in the systems that document the case. Therefore, the increase in the reported cases implies that sexual assault and abuse are diminishing through training and awareness, leading to a more sensitive and better-informed society ready to avoid, control, and report such cases. The Occurrence of Sexual Assault The cases of sexual assault occur in the military due to their lifestyles. The overconsumption of alcohol is an identified lifestyle risk exposure to sexual assault (Ray, 2015). Another factor that leads to sexual involvement is spending much time watching extremely violent content such as movies or playing video games that carry strong sexual themes. Such activities influence sexual assaults directed to either their colleagues or to ordinary citizens. An example of such incidence involved retired Col. David Riggins. Susan Shannon, an army cadet (Melissa, 2017), filed charges against the Colonel for rape. According to Melissa (2017), Suzan alleges that the rape incident happened after heavy alcohol consumption. Although the case was resolved by the court and the Col. Riggins acquitted, the issue reveals that alcohol consumption plays role in cases of the military sexual assault. Training Programs as a Mitigation to Sexual Assaults Training creates awareness and offers quality information to the military. The information gives approaches on how to avoid the occasions that increase the vulnerability of sexual assault (Headquarters, Deputy Chief of Staff, 2018). Training also supports the service men and women with the preparedness on how to respond effectively to incidences of rape irrespective of the perpetrator as well as their influence or the promised reward used to cover-up the assault. The SHARP training program helps to build confidence both in public and the military. Improved reporting through the SHARP program has enhanced the confidence of the military in managing offenses. Given that the program promotes avenues for care and confidential reporting, the number of assault cases has decreased (Ray, 2015). Therefore, the increase in reported cases is a sign of improved awareness. Ending Sexual Assault in the Military Strengthening ethical conduct in the military practice is the utmost model that would end sexual assault. Hillman (2009) avers that solidifying reporting systems and effectively prosecuting the cases would reduce such assaults. Accordingly, awareness program among individuals in the military and the public would foster a cordial relationship that eliminates negative behavioral attitudes that are incidental to sexual assault. Conclusion Sexual assault in the military is an attitude issue caused by poor behavioral tenets and social exposure. Excessive consumption of alcohol and exposure to violent sexual contents are major causes that require mitigation initiatives through training and awareness. The SHARP program should ensure that its services infiltrate the military units to deliver effective approaches with the potential to build knowledge and skills between the military and the public to curb the vice. Through improved reporting and prosecutions, the military can achieve the objective to end the sexual assault. References Headquarters, Deputy Chief of Staff Deputy Chief of Staff, G-1. (2018). Sexual assault awareness and prevention month. U.S. Army. Retrieved from https://www.army.mil/standto/2018-04-03. Hillman, E. L. (2009). Front and center: Sexual violence in US military law. Politics Society, 37(1), 101-129. Melissa, L. (2017). Woman who falsely accused former Army colonel of rape now has to pay million in damages. American Military News. Retrieved from https://americanmilitarynews.com/2017/08/woman-who-falsely-accused-former- armycolonel-of-rape-now-has-to-pay-millions-in-damages/. Ray, G. (2015). HRC SHARP program opens its doors to raise awareness. HRC Public Affairs. Retrieved from https://www.army.mil/article/147186/hrc_sharp_program_opens_its_doors_to_raise_aw a reness.