Circadian rhythms

Question 1

Gonotrophic cycle

Answer 1

cycle of blood feeding, egg production and egg laying, lasting 2-3 days

Question 2

Acoustic autograph

Answer 2

measures the spontaneous flight activity of a mosquito

Question 3

Circadian rhtyhms

Answer 3

cyclical patterns of behaviour generated endogenously by biological clocks set by exogenous factors such as daily cycle of light and dark

Question 4

Disoria

Answer 4

Hormone generated by eggs which has a phase setting effect in mosq.

Question 5

Anophelenes host seeking

Answer 5

active process, females roam until locate odour plume then fly up concentration gradient

Question 6

MAG

Answer 6

male accessory gland
renders female anophelenes refractory to further insemination by secreting protein - Matrone
transferred by male with seminal fluid and absorbed into haemolymph of female

Question 7

Circadian oscillator

Answer 7

2 components - affected by insemination, bloodfeeding and egg production

Question 8

ecydysome

Answer 8

hormone produced by ovaries - stimulates oviposition seeking behaviour along with MAG

Question 9

Aedes flight activity

Answer 9

bimodal activity but durnal with morning and afternoon peaks

Question 10

Aedes mating/ breeding

Answer 10

don’t disperse from breeding sites but mate in vicinity of host

Question 11

Anopheles mating

Answer 11

males swarm at dusk and females fly into swarms

Question 12

Aedes biting

Answer 12

passive searching for host odour

Question 13

flight activity of malaria parasitised mosq

Answer 13

after 10 days infected mosq becomes significantly more active

Question 14

Aedes with filarial worms - flight activity

Answer 14

Flight activity depressed for two days - microfilarae penetrate muscles
activity returns to normal after 3-6 days - development of L2 larvae
permanent decrease in flight activity after day 8 - migration of L3 from muscle to proboscis