Lecture 22 - Wildlife forensics and entomology Flashcards
What are the differences between an ametabolous, paurometabolous and nolometabolous insect?
Ametabolous - juveniles develop in size but do not change much physically. Paurometabolous - hatchlings emerge as nymphs and grow by molting and slight metamorphosis. Nolometabolous - larvae increase in size through molting and transition into adulthood through metamorphosis
What are the characteristics of a flesh fly?
Arrives early, feeds upon flesh and has live births
What are the characteristics of a house fly?
Early arrive, feeds on carbohydrates and lays eggs
What are the characteristics of a rove beetle?
Early arrival, feeds on fly larvae and has burying characteristics
What are the characteristics of a carrion beetle?
Last of the early arrivers and has burying characteristics
What are the characteristics of a clown and carpet beetle?
Later arrival and hides under the body
How are flying insects collected?
Trapped in a net and put into a killing jar, a jar filled with cotton balls soaked in ethyl acetate
How are crawling insects collected?
Collected with forceps, eggs, larvae and adults are all collected
What is the maximum limit on time since death based on?
Insect collection and recent weather conditions
What is the minimum limit on time since death based on?
Estimated by the age of developing immature insects
What are the four ecological categories?
Necrophagous species which feed on the body. Predatory and parasitic species which prey on other insects. Omnivorous species which eat whatever food source is available. Incidental species which use the cadaver as an extension of their normal habitat
What is involved in faunal succession?
The analysis of natural changes that take place in the body following death
What is the maggot mass effect?
A mass of maggots in one are results in a local significant temperature increase
