Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded...
-
Upload
jonas-hopkins -
Category
Documents
-
view
215 -
download
0
Transcript of Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded...
![Page 1: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/1.jpg)
Immersing Corpses in Water
4/10/08
![Page 2: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/2.jpg)
Overall Effects on Corpse
Decomposition generally retarded
Decomp begins in head region
Skin of hands and feet
Livor mortis may not appear
Bloating
![Page 3: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/3.jpg)
![Page 4: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/4.jpg)
Overall Effects on Corpse
Finger and toenails easily detachable
Skeletonization
![Page 5: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/5.jpg)
Faunal Associates
Ectoparasites
Fleas
Body lice
![Page 6: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/6.jpg)
Carrion Community Associates
Pig carcass study by Payne
Stage one: submerged fresh
Bloat
Aquatic Insects
![Page 7: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/7.jpg)
Hydrophilid Beetles
Coleoptera: Hydrophilidae
Water scavenger beetles
284 species in North America
1-40 mm
Long palpi
Larvae predatory, adults scavengers
![Page 8: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/8.jpg)
Hydropsychid Caddisflies
Trycoptera: Hydropsychidae
Water nymph
146 species in North America
Adults 6-19 mm
Larvae: streams and rivers
Feed on algae, diatoms, crustaceans, insects
![Page 9: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/9.jpg)
![Page 10: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/10.jpg)
Chironomid MidgesDiptera: Chironomidae
Non-biting midtes
700 species
1-10 mm
Resemble mosquitos
Larvae aquatic
![Page 11: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/11.jpg)
![Page 12: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/12.jpg)
Simulidae Larvae
Diptera: Simulidae
Black flies
Blood feeders
Small, black/grey
Larvae aquatic
![Page 13: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/13.jpg)
![Page 14: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/14.jpg)
![Page 15: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/15.jpg)
Heptageniid Mayflies
Ephemeroptera: Heptageniidae
Mayflies
500 species
Clear wings, prominent venation
Nymps aquatic, flattened, streamlined
![Page 16: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/16.jpg)
![Page 17: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/17.jpg)
Carrion Community Associates
Stage two: submerged fresh
Early Floating
Exposed abdomen: eggs
Submerged portions still inhabited by organisms in stage one
![Page 18: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/18.jpg)
Carrion Community Associates
Stage three: Floating Decay
Blowfly eggs hatch
Oviposition ceased by Day 3
Coleoptera
Silphids, Staphylinids, Histerids
![Page 19: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/19.jpg)
![Page 20: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/20.jpg)
Carrion Community Associates
Stage four: Bloated Deterioration
Many maggots, beetles
Most tissues gone
![Page 21: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/21.jpg)
Carrion Community Associates
Stage five: Floating Remains
Few maggots
Histerid beetles
Small flies: Sphaerocerids, Phorids, Drosophilids, Psychodids
Stage ends when remains sink
![Page 22: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/22.jpg)
Carrion Community Associates
Stage six: Sunken Remains
Decomp completed by bacteria and fungi
![Page 23: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/23.jpg)
Postmortem Submersion Interval
Make use of organisms which attach themselves to substrate
Understand differences between moving and still water organisms
no purely sarophagous aquatic insects
![Page 24: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/24.jpg)
Ecological Function
Food for invertebrates and fish
Shelter
Attract secondary scavengers
Substrate for producers
Substrate for grazers
![Page 25: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/25.jpg)
Saltwater Submersion
Fauna almost completely different from fresh water
little studied
Barnacles
Shrimp, prawns, crabs
![Page 26: Immersing Corpses in Water 4/10/08. Overall Effects on Corpse Decomposition generally retarded Decomp begins in head region Skin of hands and feet Livor.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0191a28abf838cce402/html5/thumbnails/26.jpg)
AnyQuestions?