W9: Invertebrate Physiology (Reproduction, Forensics & SIT) [Dr. Blair] Flashcards
Kinds of insect reproduction/Insect reproductive strategies? (3) HOP
- Haplodiploidy.
- Oviparous.
- Parthenogenesis.
Haplodiploidy attributes? (3)
- Sexual reproduction.
- No fertilisation (haploid) (ie, eggs develop without fertilisation).
- Seen in eusocial insects (bees & ants).
Oviparous attributes? (3)
- Sexual reproduction.
- Fertilisation of eggs occurs & produces diploid (2n) offspring.
- Seen in most insects (flies, mosquitoes).
Parthenogenesis attributes? (3)
- Asexual reproduction.
- No fertilisation (ie, eggs develop without fertilisation).
- Seen in aphids, wasps & stick insects.
Egs of oviparous insects? (2)
- Bees.
- Ants.
Egs of parthenogenetic insects? (3)
- Wasps.
- Aphids.
- Stick insects.
Eg of haplodiploidy insects?
Flies.
Diptera attributes? (3)
- Order of flies.
- Two wings.
- Part of the important species in medical & applied entomology.
Family under Diptera to focus on?
Calliphoridae.
Calliphoridae is AKA?
Blow flies.
Blow flies attributes? (2)
- Over 1100 species.
- Important in forensics as they often found on dead, often bloated, bodies upon which these flies/larvae are found.
Fly life cycle layout in order? (6)
- Eggs.
- 1st larval stage.
- 2nd larval stage.
- 3rd larval stage.
- Pupa.
- Adult.
- Repeat process.
Why are maggots eyes positioned where they are positioned?
Blow flies courtship process: Finding Ms. Right? (5)
- Males will find a female (7 day old females).
- Courtship process is initiated by the male.
- Done by mating with the female and spreading her wings.
- Female’s eggs are fertilised provided she is accepting of the male.
- Females mate once, while males mate multiple times.
Myiasis?
= the invasion of vertebrate tissues/organs (dead or living) by Dipteran larvae.
Flies that cause myiasis in South Africa? (2)
- Tumbu flies.
- Screw-worm flies.
Tumbu flies?
= under Calliphoridae family.
Screw-worm flies attributes? (4)
- Under the Calliphoridae family.
- Have a rapid life cycle (3 weeks).
- Partake in obligate myiasis.
- Cause significant damage by laying eggs in vertebrate tissues, affecting livestock and sometimes humans.