logging in or signing up WL220 Sex and Age Malbern Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 167 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: August 13, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Methods of Age Structure: Methods of Age Structure MAMMALS Cementum annuli Radiographs Ossification of long bones Skull measurements Slide2: Slide3: Male #1 7-9 years old Tooth Replacement andamp; Wear Methods Mammals Slide4: Extracted Premolar Slide5: Cementum annuli Methods Mammals Slide6: Annuli Age Structure Mammal: Age Structure Mammal Age Structure MammalMortality Event: Age Structure Mammal Mortality Event Age Structure Mammal Over Harvest-Truncated: Age Structure Mammal Over Harvest-Truncated Methods of Age Structure: Methods of Age Structure BIRDS Wing characteristics Weight Ossification of bones Bursa of Fabricius Band Returns Slide11: Probing the Bursa Methods Birds Methods--WEAR PATTERNS: Methods--WEAR PATTERNS If the ends of the outer two primary feathers are somewhat rounded and smooth, then the bird is likely an adult Methods--WEAR PATTERNS: Methods--WEAR PATTERNS If the ends of outer two primary feathers are more pointed and frayed, the bird is likely a juvenile Age Structure Bird: Age Structure Bird Slide15: Age Ratio Calculations 50 Adults and 100 Juveniles 100/50 = 2.0 juveniles/adult 60 Adult and 10 Juveniles 10/60 = 0.16 juveniles/adult Information from Age Structure: Information from Age Structure Status???—Increasing? Decreasing? Harvest-is age structure truncated? Mortality event-missing age class Survival-Mortality-can be calculated Sex Ratio??? Only if harvest open to both sexes Sex Ratio: Sex Ratio Why???? Need both sexes for reproduction to occur Number needed varies with breeding strategy—polygamy, monogamy, polyandry Sexes can compete with one another for resources May want to protect females if managing for population increase Slide18: Breeding Strategies Polygamy = One male, many females. Monogamy = One male, One female Polyandry = One female, many males Slide19: Sex Ratio Calculations 50 males and 100 females 50/150 = 0.33 * 100 = 33 33 males:66 females or 1:2 50/100 = .5 * 100 = 50 50 males/100 females Slide20: Survivorship Significant Declines You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
WL220 Sex and Age Malbern Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 167 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: August 13, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Methods of Age Structure: Methods of Age Structure MAMMALS Cementum annuli Radiographs Ossification of long bones Skull measurements Slide2: Slide3: Male #1 7-9 years old Tooth Replacement andamp; Wear Methods Mammals Slide4: Extracted Premolar Slide5: Cementum annuli Methods Mammals Slide6: Annuli Age Structure Mammal: Age Structure Mammal Age Structure MammalMortality Event: Age Structure Mammal Mortality Event Age Structure Mammal Over Harvest-Truncated: Age Structure Mammal Over Harvest-Truncated Methods of Age Structure: Methods of Age Structure BIRDS Wing characteristics Weight Ossification of bones Bursa of Fabricius Band Returns Slide11: Probing the Bursa Methods Birds Methods--WEAR PATTERNS: Methods--WEAR PATTERNS If the ends of the outer two primary feathers are somewhat rounded and smooth, then the bird is likely an adult Methods--WEAR PATTERNS: Methods--WEAR PATTERNS If the ends of outer two primary feathers are more pointed and frayed, the bird is likely a juvenile Age Structure Bird: Age Structure Bird Slide15: Age Ratio Calculations 50 Adults and 100 Juveniles 100/50 = 2.0 juveniles/adult 60 Adult and 10 Juveniles 10/60 = 0.16 juveniles/adult Information from Age Structure: Information from Age Structure Status???—Increasing? Decreasing? Harvest-is age structure truncated? Mortality event-missing age class Survival-Mortality-can be calculated Sex Ratio??? Only if harvest open to both sexes Sex Ratio: Sex Ratio Why???? Need both sexes for reproduction to occur Number needed varies with breeding strategy—polygamy, monogamy, polyandry Sexes can compete with one another for resources May want to protect females if managing for population increase Slide18: Breeding Strategies Polygamy = One male, many females. Monogamy = One male, One female Polyandry = One female, many males Slide19: Sex Ratio Calculations 50 males and 100 females 50/150 = 0.33 * 100 = 33 33 males:66 females or 1:2 50/100 = .5 * 100 = 50 50 males/100 females Slide20: Survivorship Significant Declines