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Ento 2010 Week 10 Notes

by: Caitlin Conner

Ento 2010 Week 10 Notes ENTO 2010

Marketplace > University of Georgia > Entomology > ENTO 2010 > Ento 2010 Week 10 Notes
Caitlin Conner
GPA 3.8

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Lecture notes from March 21-March 25
Insects & the Environment
Class Notes
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Popular in Insects & the Environment

Popular in Entomology

This 4 page Class Notes was uploaded by Caitlin Conner on Friday March 25, 2016. The Class Notes belongs to ENTO 2010 at University of Georgia taught by Espelie in Spring 2016. Since its upload, it has received 25 views. For similar materials see Insects & the Environment in Entomology at University of Georgia.

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Date Created: 03/25/16
 Ento 2010 Week 10 Notes  March 21, 2016 o Order: Diptera  Di=two  Ptera=wings  Common name: Flies & mosquitoes  Species: 90,000 o Diptera  Complete metamorphosis  Mouthparts: piercing/sucking or sponging  1 pair of membranous wings  no hind wings  halteres=stabilizers (replace hind wings)  primitive larvae=maggots  many larvae are aquatic  most harmful order: many members cause disease o Flies  Flies are best insect fliers  Hoverflies: 175 wing beats/second  Halteres give stability o House Fly:  Regurgitates on food  Enzymes soften food  Then, uses sponging mouthparts  Transmits disease mechanically:  Picks up disease somewhere and carries disease to another location  Can “see” movement very well  Uses leg hairs to taste  Has SPONGING MOUTHPARTS  Oily hairs on feet: walk on ceiling o Fly farms  Maggots are used to eliminate animal farm waste o Medical treatment  People with poor circulation  Leg (or arm) wounds heal slowly  Add fly maggots to wound  Maggots eat dead flesh  Prevents amputation o African Sleeping Sickness  Vector: tsetse fly  Disease: protozoans  Genus: trypanosoma  Drug treatment is effective  165,000 deaths per year o Sleeping sickness kills people and cows  Wild animals=reservoir host  Africans can’t raise cattle  People of Africa need more protein  Tsetse fly=”Guardian of Africa”  Because native habitat has been saved o Tsetse Fly Female:  Does not lay eggs  Has 1 egg that hatches inside female fly  Larva develops inside female fly  Mature larva is born  Burrows into soil and pupates  Adult emerges from soil  Produces only 8 larvae!  March 23, 2016 o Mosquito life cycle  Eggs laid in or near water  Aquatic larvae  Aquatic pupae  Adults live 1-3 weeks  Female mates in male swarm  Male feeds on flowers  Female needs “blood meal” o Mosquito larvae have a siphon tube for breathing o Mosquitos have piercing/sucking mouthparts! o Mosquitos:  Female attracted to host carbon dioxide  Sound of female wings attracts male o Mosquitos-piercing/sucking mouthparts have:  Protective sheath  Tube to suck blood  Knife-like mouthparts  Saliva injector (stops blood clotting) o 1/6 of humans have an insect-vectored disease  malaria has killed more people than any other disease  1897: Ronald Ross showed that mosquitos vector malaria  1900: Walter Reed showed that mosquitos vector yellow fever o Yellow Fever  Vector: mosquito  Genus: Aedes  Disease: virus  Reservoir host: monkeys  Worst in South America & Africa  No effective treatment o Dengue Fever  Vector: mosquito  Genus: Aedes  Disease: virus  No effective treatment  South America, Africa, & Caribbean o Zika Fever  Vector: mosquito  Genus: Aedes  Disease: virus  No effective treatment  South America, Africa, & Caribbean  Special concern: pregnant women  Zika may cause microcephaly o Malaria  Vector: mosquito  Genus: Anopheles  Disease: protozoan  Genus: plasmodium  Drug treatment is effective  South America, Africa, & Asia o Malaria life cycle  Mosquito feeds on infected host  Plasmodium mates in mosquito’s stomach  Moves to salivary glands  Mosquito feeds on new host  Plasmodium moves to host liver  Attacks red blood cells o Red blood cells rupture  Cycle repeats in host: 24, 48, 96 hours o Mated female mosquito:  Eggs do not develop without a blood meal  Head produces hormones needed for egg production o Natural Selection in Africa:  A mutation changed structure of hemoglobin  This change provided resistance to malaria  People with 1 copy of the gene survive malaria  People with 2 copies of the gene have Sickle Cell Anemia  March 25, 2016 o No Class


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