Practical 1:
COLLECTION, PINNING, LABELING, DISPLAY AND STORAGE
Title: Insect collection, Pinning, Liquid Preservation, Labeling, Display and Storage
Introduction:
A medical entomologist studies how insects cause us harm. Insects bite us and sting us, but they also transmit diseases through their behavior. The medical entomologist learns the route of disease transmission, its course and how to prevent and cure the problem. The military employs many medical entomologists to study insect-borne diseases in other countries.
The insect collection methods are using the tools because some insect are hard to catch and it camouflages cause the human eye cannot see it normally, it also keep the insect on best condition and not cause it to be injured or damage.
Objective:
- To collect ,preserve ,label and store various types of insect
- To identify the body part of insect that can be distinguish easily.
Material:
Specimen container, Forceps, Alcohol/chloroforms, Petri dish, Magnification glass, Needle
Procedure:
1. A few different type of insect are collected and put the insect inside a container filled with alcohol/chloroforms.
- The insect will be pinned and observed on the dissect box with pinned.
- Observe the morphology of the insect with magnification glass and drew the observation.
Result:
Discussion:
In this experiment, all the insect that catch will be observe and study on all the morphology of the insect. The study of insects shows just how important these small creatures are. Insects serve as the most effective pollinators of plants, and without them, some plants might be extinct. Insects provide products, such as honey and silk. More than 500 different types of insects serve as food for human consumption. The insect that be observed in this experiment are butterfly, dragonfly and spider. These entire insects are been catch by using some method that safe and wont destroyed the morphology or the parts of the insect. All this three of insect have different morphology, shape, color and species.
The dragonfly body shapes are small and long abdomen. It belongs to kingdom is animalia, phylum is arthropod, class is insect, order is odonata, and suborder is epiprocta. The characteristic are have the strict sense, large multifaceted eye, with two pairs wing that transparent and elongated body. The non adult dragonfly is called the damselflies it has the different characteristic from the dragonfly. It also can be found on the fresh water area and eat other insect. It has three apart of body that is head, thorax and abdomen. It also compose with the two large compound eye located on the head. The dragonfly also has three pairs jointed leg and two pairs long, delicate, membranous wing.
The Morphology of a butterfly is an adult lepidopteron insect with wings covered with fine scales of various colors. The butterfly also has Apex. It is a point of the butterfly's wing. Outer margin is the outer part of the wing. Nerve is a part of the butterfly that projecting line on the wing of a butterfly. Cell also a part of the butterfly's wing outlined by the wing veins. Fore wing is foremost appendage of aerial locomotion of a butterfly. Hind wing is rear appendage of aerial locomotion of a butterfly. Thorax also one of the parts that butterfly has. It is a central part of a butterfly's body. Hind leg is rear appendage of a butterfly used for terrestrial locomotion. Abdomen is located rear part of a butterfly's body. The segment is one of the portions of a butterfly's body. The Middle leg is the middle appendage of a butterfly used for terrestrial locomotion. The Tibia also a middle part of the leg of a butterfly has. Femur is first part of the leg of a butterfly. The Fore leg is front appendage of a butterfly used for terrestrial locomotion. The Proboscis is elongated mouth part of a butterfly. The Compound eye is complex sight organ of a butterfly. The Head is foremost part of the body of a butterfly. The Antenna is an organ of touch of a butterfly. The classification of the butterfly are from kingdom is animalia, phylum is arthropod, class is insect, order is lepidoptera, family is noctuidae, and the genus is helicoverpa armigera.
The morphology of the spider starts with the eyes and the head. It has single eyes. The spider also has pedipalp to a walking leg and having a tactile and prehensile function; a spider has two. The fang is Curved part below the eyes and attached to the venom gland; it allows the spider to catch its prey to inject it with venom. The cephalothoraxes’ is a meeting point of the head and the thorax forming the anterior portion of the spider’s body. The abdomen is posterior portion of the body of a spider containing the main vital organs, including the heart, the intestines and the genital organs. Spinneret is an appendage located near the anus, where the silk glands end; the spider generally has three pairs. Eye is an Organ of vision joined to the brain by a nerve; the spider usually has four pairs of simple eyes. Lastly the walking leg Is an articulated member supporting the body and allowing the spider to move; a spider usually has eight.
To catch these insect the method used are only option is insect net because this flying insect cannot be catch by hand because it hard and may break their wing. The collected insect will be kept on the jar with air hole on it to keep them alive, to find them the place that should be looking are on their habitat for example the butterfly on the garden area and the dragonfly on the pond area.
For the preservation of the insect the insect for the big size will be dissect to remove the organ and other substances inside it ,the it will be kept in a form-alcohol solution such as Pampel's Fluid (95% alcohol, 15 parts; formalin, 6; glacial acetic, 4; and distilled water, 30 parts) to maintain the morphology of the insect. But adding some cotton inside it also can be used also. For the small insect it will be inject alcohol inside it but no dissection to remove the internal bodies, it may also be spray with special wax to kept the exoskeleton look shiny, the hair spray also can be used as the wax also. After all the insect preservative, the insect will be keep in oven in 370 C about 24 hours.
Conclusion:
Based on the experiment, the medical entomology is important to be studies to be study the insect that will harmful to human. In this experiment also study how to collect, preserve label and store the various types of insect. It also to identify the body parts of insect that can be distinguished easily.
Question:
- List down the 3 tools that can be used for the insect collection?
Insect net, fly trap and torch light.
- State the type of metamorphosis for each type of insect in your result.
Butter fly-egg, larva, pulpa and adult
Dragonfly – egg, nymph, adult
Beetle –egg, larva, pulpa, and adult
References:
· Read more: The Importance of Entomology | eHow.com http://www.ehow.com/about_6755973_importance-entomology.html#ixzz1QxQFvl1C
· Read more: Different Types of Entomology | eHow.com http://www.ehow.com/info_8124277_different-types-entomology.html#ixzz1QxMwIdOO
Dragonfly Anatomy
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