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WILDLIFE FORENSICS

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imogene-ferguson
47 diapositives · 1K Views · Nov 21, 2014

WILDLIFE FORENSICS. CSI FOR WILDLIFE. http://www.fotowolfie.com/blog/images/20061006220751_dsc_3423.jpg. The student will:. Identify the various types of skull and jaw bones in their evidence sample Utilize different types of dichotomous keys

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  1. WILDLIFE FORENSICS CSI FOR WILDLIFE http://www.fotowolfie.com/blog/images/20061006220751_dsc_3423.jpg

  2. The student will: • Identify the various types of skull and jaw bones in their evidence sample • Utilize different types of dichotomous keys • Identify different types of animal hair as to species type • Solve the forensic crime • Interpret a topographic map

  3. Foramen magnum – large opening in the base of skull, spinal cord passes through Skull Anatomy Foramen magnum

  4. Zygomatic arch– formed from 2 slender bony processes (one from the temporal bone and one from the maxilla) Skull Anatomy

  5. Sagittal crest - thin ridge of bone atop and down the braincase Sagittal Crest

  6. Incisors– smaller more vertical teeth on center front of jaw (purple) Canines– longer more pointed teeth (green) Teeth Identification

  7. Premolars- flatter teeth behind the canines (pink) Molars– teeth further back in jaw (aqua) Diastema– gap in teeth at canines (between green and purple) Teeth ID

  8. Kinds of molars Seleodont: found in herbivores; have ridges Bunodont: found in omnivores; have 4 cusps Carnassial: found in carnivores; fit together, shearing edges

  9. Raccoon - omnivore • Facial region is short/wide • Facial length < cranial length • Male skull: 94-125 mm • Female skull: 90-115 mm • Weak sagittal crest

  10. Raccoon skull Dental fromula = 3/3 I: 1/1 C: 4/4 P: 2/2 M

  11. Raccoon skull and hair examples

  12. Large canines and molars Small vestigial teeth behind canines Long, massive skull: narrow muzzle Large jaw hinge for muscle attachment Obvious sagittal crest Bear- omnivore Vestigial teeth

  13. Bear- skull and hair samples Hair Coats can be yellow, black and blue grey

  14. Skunk - omnivore • Long, oval shaped skull • Upper jaw somewhat square • 1 back molar in upper jaw (most carnivores • have 2) • 2 back molars in lower jaw

  15. Hair examples Skunk skull and hair samples

  16. Opossum - omnivore • Long snouts, narrow braincase • Prominent sagittal crest • Small incisors, large canines, tricusp molars • Lots of teeth compared to most animals

  17. Hair examples Opossum- skull and hair samples

  18. Cat family- carnivores

  19. Teeth: Sharp, pointed canines Skull: Short round Large eye orbits Bobcat - carnivore

  20. Cat hair samples Bobcat – skull and hair samples

  21. Dog family - carnivore

  22. Grey Fox - carnivore Long snout, lyre-shaped parasagittal crest with a flat area between

  23. Red Fox skull and hair samples Red Fox- carnivore

  24. Beaver- herbivore • Second largest rodent • Very large incisors—continually grow • Very large diastema—no canines • Shape of nasal bones square off the snout

  25. Hair examples Beaver

  26. Rabbits - herbivore • Teeth: Two pair of incisors; one large and the 2nd small and peg like • Lacy mesh-like bones

  27. Hair sample Rabbits- skull and hair sample

  28. Teeth No upper incisors Long diastema Selenodant teeth White tailed deer- herbivore

  29. Hollow brittle hair When folded in half forms a teepee or breaks Deer hair examples http://www.iamaweb.com/Animal_Hair/Beaver/Beaver_image_menu.html

  30. Skull Recap Bear Identify the skulls that follow:

  31. Raccoon

  32. Rabbit

  33. Deer

  34. Bobcat

  35. Beaver

  36. Fox

  37. opossum

  38. Skunk

  39. GIS makes it possible to combine layers of digital data from different sources and to manipulate and analyze how the different layers relate to each other. Geographic Information Systems (GIS) are causing a mapping revolution.

  40. Police investigators link police record systems with geographic information to analyze crime patterns and help solve cases. Crime solving

  41. Portray the shape and elevation of the land Topographic maps show the three-dimensional ups and downs of the terrain on a two-dimensional surface. Contour Lines

  42. Each contour is equal to a line of equal elevation- contours never cross Topographic contours are shown in brown by lines of different width. They show the general shape of the terrain.

  43. Contours that are very close together represent steep slopes. Widely spaced contours or an absence of contours means that the ground slope is relatively level.

  44. 1:24,000 means 1 in =2000 ft Red areas represent urban areas. Roads and highways are represented in black and red. Scale and Colors of Topographic Maps

  45. Blue represents water Green represents orchards and forested areas. Purple markings are those that have been "photorevised," or added to the map since the original map was published.

  46. Thin brown lines represent contours or points of similar elevation. Contour lines form "v" shapes in valleys or along stream beds. The point of the "v" points uphill.

  47. Topographic maps • http://www.topozone.com/map.asp?lat=40.0122&lon=-79.07727&datum=nad27&layer=DRG