preserving animal specimen using liquid preservatives
DESCRIPTION
Preserving Animal Specimen Using Liquid Preservatives.TRANSCRIPT
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Preserving Animal Specimen Using Liquid
Preservatives
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Preservation
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Preservation- is the process by which a
specimen is conserve and avoid its
decomposition.
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Preservative- is any agent or substances
that hinder the decomposition process
of a specimen.
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Liquid Preservative
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Objectives and importance
of preservation• representative type of specimen may be used as a reference for other work to consult in future. • to maintain the qualitative and quantitative characteristics of a specimen that would be a an avenue for further study in the future.
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The Preserving Agents
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1. Formaldehyde (Formalin)- an agent used in the preservation of vertebrates specimen.
Advantages: • inexpensive• readily available• specimen almost never
decay in it.
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Disadvantages• has a very irritating odor• has a tendency to make specimen brittle. • remove or fade the color of the specimen.• it requires a rust proof container.
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2. Alcohol- used mainly for preserving invertebrates specially Arthropods.
-Safe to handle.- highly flammable.Types of alcohol readily
available in the market:Isoprophyl (70-90%)Ethyl alcohol
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Receptacles
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• Water-tight bottles- -Plastic or glass- the container should be as tall as the size of the specimen/s , such the specimen can be set straight.
• Plastic bag- useful for large specimen, specially those who contain mud and leaf-litter samples
-those who have thicker materials should be used.
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• Shallow tray- maybe plastic or metal, it is used for fixing and setting specimen of reptiles and amphibians.
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Steps for preservation of specimen
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1. Euthanizing2. Injection or Slitting3. Fixing4. Labeling 5. Storage
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1. Euthanizing-
2. Injection and Slitting- liquid preservatives must be introduced into the body cavity, limbs and tail either by injection or slitting.
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3. Fixing- While the specimens are still relaxed, they should be arranged in trays so they will harden in proper position.
4. Labeling- the specimen should be accompanied by certain data. Either attached directly on the receptacle are recorded in a notebook.
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5. Storage- specimen should be stored in liquid preservative. The specimen should be submerged in the preservative properly. - Proper storage of the receptacle should exercise for us to achieve long term preservation.
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Preserving Mollusk Specimen
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Preserving Arthropods Specimen
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Preserving Amphibian Specimen
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Preserving Reptile Specimen
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